59 results about "Phloem" patented technology

The invention belongs to the technical field of agriculture, and particularly relates to a method for promoting growth and development of rice based on illumination and nitrogen. One of the purposes of the invention is to provide a method for promoting growth and development of rice based on illumination and nitrogen. The method comprises the following steps: providing cultivation conditions of illumination intensity of 600-800 [mu] mol.m <-2 >. S <-1 > and nitrogen concentration of 5.51-8.11 mM for rice in a tillering stage of the rice. By accurately applying a specific combination of illumination intensity and nitrogen concentration in the tillering stage of rice, efficient loading and long-distance transportation of photosynthetic products (especially cane sugar and the like) in phloem are promoted, and the photosynthetic products are guided to be more effectively and directionally distributed to developed library organs (such as fruits, grains or root systems); therefore, the transfer and circulation efficiency of carbon-nitrogen substances in plants is improved synergistically on the whole, the waste phenomenon of nitrogen redundancy or local lack and ineffective accumulation of photosynthetic products is reduced, and finally, an important physiological regulation basis is provided for remarkably improving the yield and quality of crops.

The invention discloses application of a PdeTLP protein and a related biological material thereof in regulation and control of plant root system development. Experiments prove that compared with wild poplar, the number of adventitious roots, the number of adventitious root lateral roots, the root length and the root included angle of PdeTLP knockout poplar are obviously increased, and the plant height, the number of stem nodes and the stem diameter are also obviously increased. In addition, the xylem width, the phloem width and the xylem cell area of the poplar with the PdeTLP knocked out are obviously higher than those of the wild poplar. The PdeTLP gene participates in regulation and control of the root system number, the root system length, the root system included angle, the plant height, the stem node number, the stem diameter and the secondary microtubule tissue development of the poplar. The method not only has important significance on molecular mechanism and theoretical research of regulating and controlling the number and length of poplar root systems, plant height, number of stem nodes and stem diameter, but also has important guiding significance on directionally cultivating trees meeting actual production requirements.

The invention relates to a phenyl thiazole formic acid compound containing an aromatic amide structure and a preparation method and application thereof.In the phenyl thiazole formic acid compound containing the aromatic amide structure, a carboxylic acid group is beneficial to achieving phloem conductivity, and an amide active substructure introduced into an amino site effectively improves the bactericidal activity of the compound; therefore, the compound disclosed by the invention not only shows excellent agricultural fungicidal activity, but also has the capability of conducting in the phloem of the plant. The raw materials are easy to obtain and process, various pesticide formulations can be prepared, and the requirements of different conditions and different use scenes can be met. The specific structure of the phenyl thiazole formic acid compound is shown as a formula I in the specification.

The invention discloses a healing promoting agent for melon vegetable grafted seedlings. The healing promoting agent contains abscisic acid and ribulose phosphate. The effect of promoting communication of phloem and xylem of grafted seedlings can be achieved by spraying the healing promoting agent before grafting, the healing time of the melon vegetable grafted seedlings is shortened, the operation of film uncovering and film covering in the healing period is reduced, the healing period management is simplified, and the healing cost is reduced.

The application discloses a solid-phase extraction agent and a preparation method and application thereof. Raw materials of the solid-phase extraction agent include cigar stems and shavings, and the mass ratio of the cigar stems to the shavings is 1:1-2. The above raw materials are all natural plants, and in addition to being rich in vascular systems and cellulose, the structure formed by xylem and phloem arranged in bundles and a variety of capillary pore structures make the pores rich, and the structure is provided with rich polar hydroxyl and hydrophobic aromatic functional groups. After being prepared as the solid-phase extraction agent, the structure can form pi-pi bonds and hydrogen bonds with benzo[a]pyrene, has strong adsorption capacity for the benzo[a]pyrene and high adsorption stability, and due to the rich pores, has good permeability. The speed of the benzo[a]pyrene in the solution after adsorption through the extraction column is faster, the adsorption enrichment and purification efficiency of the benzo[a]pyrene in the solution after adsorption is high, and the cost is low and the structure is green and environment-friendly.

The invention discloses a microbial fertilizer for treating citrus huanglongbing and a preparation method of the microbial fertilizer, and belongs to the field of agricultural biological control. 33 to 50 percent of sodium alginate-chitosan microspheres; 5 to 8% of hesperidin; 3-5% of nano zinc oxide; 2-4% of humic acid chelated boron; 2-4% of sucrose fatty acid ester; 2-4% of diatomite; wherein the preparation method of the sodium alginate-chitosan microspheres comprises the following steps: mixing sodium alginate with a microbial suspension, dropwise adding the mixture into a calcium chloride solution by using an injector, and standing and curing to form a microsphere core; and immersing the cured microspheres into a chitosan solution with the pH value of 6.0, taking out, and freeze-drying to obtain finished microspheres. Wherein the microbial suspension comprises trichoderma, bacillus and actinomycetes. The invention solves the problems of poor prevention and treatment effect of the existing Candidatus Liberobacter asiaticum, difficulty in colonization of the strain at phloem, short survival time and lack of targeted slow release function.

The application discloses a propiconazole-azoxystrobin- clothianidin seed treatment suspending agent and a preparation method and application thereof, and belongs to the technical field of pesticide preparations; the agent takes propiconazole, azoxystrobin and clothianidin as active ingredients, takes beta-nicotinamide mononucleotide (NMN) as a functional antimicrobial component, and is supplemented with styrene-maleic anhydride copolymer sodium salt, fatty alcohol polyoxyethylene ether, xanthan gum, magnesium aluminum silicate, glycerol, polydimethylsiloxane defoaming agent, sodium benzoate, polyvinyl alcohol and deionized water to prepare the agent. The application is suitable for seed coating treatment for preventing and treating rice false smut, thrips and wheat sharp eyespot and aphids; NMN promotes the accumulation of phenolic compounds in the phloem of plants, and cooperates with clothianidin on the same insecticidal target, thereby significantly improving the prevention and treatment effect on aphids and thrips; the degradation product of NMN promotes the proliferation of beneficial microorganisms in the rhizosphere, improves soil enzyme activity, and realizes soil micro-ecological restoration.

The invention provides a method for high-pressure propagation and rapid seedling culture of acanthopanax giraldii harms, and belongs to the technical field of rapid propagation of acanthopanax giraldii harms. The method comprises the following steps: 1-3 days before high-pressure propagation in April to August, shading seed trees of acanthopanax giraldii harms; the method comprises the following steps: selecting branches which grow for more than or equal to 1 year on an acanthopanax giraldii harms seed tree, girdling, and scraping away phloem of the girdled part; carbendazim, a rooting solution 1 and a rooting substrate are mixed and filled into a breeding box, the breeding box is pressed at the branch girdling position, a girdling notch is kept in the dead center of the breeding box, and the breeding box is fixed; the relative humidity of the rooting substrate in the breeding box is kept to be 70%-80%, and a rooting promoting nutrient solution is supplemented regularly. According to the method, the problems of microbial contamination and browning in traditional tissue culture are solved, only 4-6 months are needed, the seedling culture time of the acanthopanax giraldii harms is greatly shortened, and the reproduction rate and the branch utilization rate are remarkably increased; the rooting rate and the survival rate both reach 90% or above, and the material cost and the time cost are saved.

The invention discloses a tree peripheral bark callus inducer as well as a preparation method and a use method thereof, and belongs to the technical field of plant tissue hyperplasia. The inducer is prepared by mixing the following components in parts by mass: 900 to 1100 parts of water, 90 to 130 parts of a humectant, 0.01 to 0.5 part of a proliferation agent and 0 to 15 parts of a protective agent. When the inducer is prepared, firstly, water is heated to 50-60 DEG C, under the condition of heat preservation, the humectant weighed according to the proportion is added and fully stirred to be dissolved, then the protective agent weighed according to the proportion is added and fully stirred to form a homogeneous system, then the temperature is reduced to the room temperature, the inducer weighed according to the proportion is added, and the homogeneous system is formed after the inducer is fully stirred again. When in use, the inducer is prepared according to the formula proportion and the method; the composition is sprayed on a fresh wound surface of a peeled bark, the dosage is 0.06-0.10 ml / cm < 2 >, and then the wound surface is wrapped by a degradable film. The inducer can effectively shorten the callus time of peridermis, promote the formation of hyperplastic tissues, increase the growth amount of cork and improve the quality uniformity of the cork.

The application discloses a method for detoxification of jujube tree stem tips, which comprises the steps of material pre-culture, secondary cutting of stem tips, loading, vitrification of ultra-low temperature treatment, thawing and recovery culture. The application effectively improves the survival rate of stem tip explants by optimizing the pre-culture in the medium of the formula and secondary cutting of stem tips, and to some extent, solves the contradiction among the size of stem tips, survival rate and detoxification rate. The phloem-associated virus is detoxified by the treatment of ultra-low temperature freezing therapy, and the survival rate of the explants reaches 50%, and the detoxification rate is 100%. Therefore, the jujube stem tip ultra-low temperature freezing detoxification technology can effectively remove the phloem-associated virus of winter jujube.

The application discloses a method for improving survival rate of palm-leaf wood budding, and belongs to the palm-leaf wood grafting technical field.The grafting method is as follows: (1) selection of stock: selecting palm-leaf wood with a result rate and oil content lower than normal for more than three years as the stock; (2) selection of scion: selecting one-year-old branch of palm-leaf wood with excellent traits and stable yield for more than two years as the scion; (3) grafting: cutting out bud pieces on the scion and waiting for use; cutting out incisions with the same size as the bud pieces on the stock, reaching the phloem, and embedding the bud pieces into the incisions on the stock after taking out, and then binding tightly, so that the problem of low survival rate of palm-leaf wood grafting propagation is solved, and the economic benefit of economic forest is improved.

The invention belongs to the field of molecular biology, and particularly relates to application of an MdHT13.2 gene in regulation and control of plant growth. According to RNA-seq (Ribonucleic Acid-Seq) data analysis, MdHT13.2 with high expression quantity in apple leaves is screened out. Mutant yeast sugar absorption complementation experiments show that MdHT13.2 not only has transport activity on hexose such as glucose, fructose and the like, but also has stronger transport capacity on cane sugar. The results of in-situ hybridization of apple leaves and GUS staining experiments of arabidopsis show that MdHT13.2 has a high expression level in the phloem of the vein. The MdHT13.2 as a member in a hexose transporter gene family can regulate and control sugar accumulation in plants and promote growth of the plants.

The application discloses a method for improving the growth and fruiting rate of 2-3-year-old Carya illinoensis container grafting seedlings after afforestation, which comprises the following steps: selecting 2-3-year-old Carya illinoensis container grafting seedlings and young seedling container seedlings, transplanting the container seedlings and the young seedling container seedlings into planting ponds in an afforestation area, setting up a wound on the stem bark of the container seedlings and the young seedling container seedlings respectively after scratching the stem bark, binding the wounds of the container seedlings and the young seedling container seedlings by using plastic cloth, filling soil, and normally maintaining; after the wounds are fully healed, the plastic cloth is removed, the part above the wound joint of the young seedling container seedlings is cut off, and the young seedling container seedlings are normally maintained until the roots of the young seedling container seedlings and the Carya illinoensis container seedlings are alive. The method can not only protect the root system of the container seedlings by the root system protection matrix, but also can release the root system winding, enhance the root system activity, and promote the rapid growth and development of the root system after transplanting.

The invention discloses a method for improving the salt tolerance of a woody plant through interspecific grafting, in particular to a method for improving the salt tolerance of a scion through grafting by taking a salt-tolerant variety as a stock, and relates to the field of grafting planting. The method comprises the following steps: (1) cutting an annual branch of a salt-tolerant woody plant as a stock, and cutting a phloem at the upper end and the middle part of a cambium from top to bottom; (2) cutting an annual branch of the woody plant and reserving 2-3 buds as scions; (3) aligning and abutting cambiums on the two sides of the long cutting surface of the scion and cambiums on the two sides of the cut of the stock, and binding with a plastic film strip; after the grafting succeeds, one vigorous leaf bud is reserved in the scion. According to the method, the populus nigra scion is grafted to the salt-tolerant American black poplar stock, so that the salt tolerance of the populus nigra scion is improved, the obtained grafted seedling has better growth advantage and salt tolerance, and the method has important application value in increasing the forest yield and cultivating new salt-tolerant varieties.

The invention discloses a traditional Chinese medicine preparation and method for preventing and treating navel orange liberobacter asiaticum. The prevention and treatment method comprises the following steps: a trunk infusion step: infusing a diluent of the traditional Chinese medicine preparation into xylem and / or phloem of a plant trunk; and a foliage spraying step: spraying a foliage fertilizer containing pyroligneous liquor to the foliage of the plant. The traditional Chinese medicine preparation comprises a Chinese herbal medicine extracting solution and aminated xylan. According to the method, a synergistic system of bacteriostasis, nutrition and immunological enhancement is formed through a comprehensive prevention and treatment method of trunk infusion and foliage spraying of the pyroligneous liquid foliage fertilizer. The traditional Chinese medicine preparation infused into the trunk inhibits pathogenic bacteria from the inside in a long-acting mode, the pyroligneous leaf fertilizer provides nutrition from the outside, regulates growth and induces system resistance, internal and external synergism is achieved, diseases are directly inhibited, the nutritional status of diseased trees is remarkably improved, the autoimmunity of the trees is enhanced, and both symptoms and root causes of the huanglongbing are treated.

The invention belongs to the technical field of insect investigation, and particularly relates to a plug-in type insect trap and an insect trapping method. The plug-in type insect trap is reasonable in design, all parts cooperate with one another, pine branch rods and pine branch leaves are simulated through branch simulants, an atomizer is installed in a supporting rod, and the insect trapping effect is improved. The atomizer can atomize attractant liquid, the attractant liquid is transmitted and attached to pine branches and leaves through the gas path system, the attractant variety can attract adults of monochamus alternatus to come forward, and when the adults fall into the branch simulants sufficiently, the vibration exciter drives the branch simulants to vibrate through the movable plate and the supporting rod, the adults are induced to fall off due to fake death, and the adults fall into the branch simulants. The adults are guided into the adult longhorn beetle collecting pipe through the sliding cover assembly; the trunk simulant in the adult longhorn beetle collecting pipe is used for simulating the phloem and the outer skin of the pine, and a spawning site is provided; pine wood sections can be reserved in the adult monochamus alternatus collecting pipe, twigs of bark of the pine wood sections are reserved to serve as nutrient supplements, and adult monochamus alternatus and worm eggs can be efficiently captured.

The application discloses a cotton topping regulator with the functions of topping control and fruit promotion, and belongs to the technical field of crop plant growth regulators.The application adopts special compound active components and special inactive additive systems, does not add any exogenous hormones, insecticides, fungicides and other auxiliary materials, and constructs a differential target regulation mechanism.The regulator can act on the cotton apical meristem, flower bud differentiation tissue and phloem nutrient transport channel, and simultaneously realizes four functions of apical vigorous shoot inhibition, invalid bud removal, bud and boll shedding inhibition and photosynthetic product directional transport, thereby replacing artificial topping operation.The application can reduce the cotton bud and boll shedding rate by 18.2%-23.7%, increase the per mu seed cotton yield by 12.6%-19.3%, and simultaneously optimize the cotton fiber quality;the preparation has strong storage stability, is suitable for unmanned aerial vehicles, large-scale traction spraying machines and other full-process mechanized plant protection equipment, has a green and waste-free preparation process, meets the development needs of cotton simplified and green cultivation, and has high field popularization value.

The present disclosure relates to a single stranded RNA vector suitable for introducing a therapeutic agent, such as a peptide, a protein or a small RNA, into a host plant. The vector does not encode for any movement protein or coat protein, but is capable of capable of systemic and phloem-limited movement and replication within the host plant.

The utility model discloses an electric girdling device for winter jujube tree branches, which comprises a direct current brushless motor, a rotating output shaft of the direct current brushless motor is connected with one end of a planetary reducer, and the other end of the planetary reducer is connected with a driving bevel gear. The driving bevel gear is in transmission connection with a girdling transmission gear arranged on the periphery of the turnover girdling tool bit through a gear set. The phloem of a winter jujube tree branch is surrounded and stripped through the girdling tool bit driven by the motor, the clamping mechanism can change along with the diameter of the winter jujube tree branch, operation is easy and convenient, the labor intensity of orchard workers is greatly relieved, and working efficiency is improved.

The invention discloses application of a PdeAPL protein and a coding gene thereof in regulating and controlling properties of a poplar material. According to the invention, a transgenic poplar overexpressed with PdeAPL and a transgenic poplar with reduced PdeAPL gene expression quantity are constructed. Experiments prove that compared with a control group, the plant height, the number of stem nodes and the length of the stem nodes of the transgenic poplar subjected to overexpression of the PdeAPL are all remarkably increased, and leaves become smaller; and the plant height and the number of stem nodes of the transgenic poplar with reduced PdeAPL gene expression quantity are reduced, the length of the stem nodes is increased, and the leaves are enlarged. In addition, the xylem width of the transgenic poplar with reduced PdeAPL gene expression quantity is reduced, and the areas of xylem conduit cells, xylem fiber cells and phloem cells are increased. The method disclosed by the invention is of great significance to reveal the regulation and control molecular mechanism of the development of the stem vascular of the forest, the tree form of the forest, the growth speed and the improvement of the wood quality, and directionally cultivate the forest with the tree form or the material meeting the actual production requirements.

The invention discloses a promoter with a nucleotide sequence as shown in SEQ ID NO: 1, which can improve the expression level of a target gene in a plant, is used for accurately modifying transporter to regulate and control nutrition distribution and heavy metal resistance at phloem, and can be used for cultivating transgenic plant varieties.

This invention relates to the field of identification technology for precious woods and medicinal materials, particularly a method for non-destructive testing of agarwood based on micro-CT to determine its authenticity and quality. The technical solution includes: acquiring complete three-dimensional data of the agarwood interior through micro-CT non-destructive scanning; extracting characteristic parameters such as the three-dimensional topological structure of the interstitial phloem, the distribution and fullness of agarwood resin, and abnormal structures; identifying authenticity by comparing these parameters with a pre-built database, particularly effective in identifying internal forgery traces such as high-pressure oil injection and mechanical compression; simultaneously, using a multi-parameter fusion model to quantitatively evaluate the spatiotemporal distribution characteristics of agarwood resin and the proportion of resin-containing interstitial phloem to determine its quality grade; achieving comprehensive, objective, and non-destructive testing of agarwood from the inside out, from authenticity to quality, especially suitable for identifying high-end crafts, collectibles, and precious agarwood raw materials, solving the industry pain point that traditional destructive testing methods cannot be applied to intact products.

The present disclosure relates to a viral vector suitable for introducing a therapeutic agent, such as a peptide, protein or small RNA, into a host or otherwise treating a host. The vector may include an exogenous RNA segment with a hairpin-like structure or having two or more base-paired regions separated by one or more non-base-paired regions. The exogenous RNA segment may have a secondary structure, minimum free energy, average positional entropy or other attributes within specified ranges, or with values similar to one or more hairpin-like structures of a reference wild type virus. Optionally, the RNA vector may be derived from the reference wild type virus or a relative of the reference wild type virus. In some examples, the vector is capable of capable of systemic and phloem-limited movement and replication within a host plant. In some examples, the reference wild type virus is an umbravirus-like associated RNA.

The invention discloses a method for collecting sieve tube overflow substances in rubber tree barks, and belongs to the technical field of sieve tube overflow substance acquisition. Rubber tree coppice shoots growing within two years are selected; a section of stem is selected from the third extension unit or the fourth extension unit, the outermost epidermis and part of the cortex layer of the bark are scraped firstly, and wiping is carried out after primary latex exudates completely; after that, scraping off the remaining part of cortex, primary phloem fiber layer and primary phloem until the secondary phloem containing the sieve tube tissue is exposed, puncturing the secondary phloem, and sucking the discharged sieve tube overflow in the secondary phloem; a V-shaped opening is upwards cut in the secondary phloem part along the punctured part, and the sieve tube overflowing matter flowing out subsequently is sucked. The method is implemented on a specific rubber tree material in a specific period, a secondary milk duct is not generated in the bark, and pure sieve tube overflow of the rubber tree can be obtained by removing the primary milk duct and the latex firstly, then obtaining the sieve tube overflow and eliminating interference of the latex in the milk duct.

This invention discloses an effective method for protecting the phloem tissue of agarwood trees from decay and resin formation, comprising the following steps: Selection of agarwood trees: Select agarwood trees over 3 years old with a diameter at breast height (DBH) of over 10 cm; Drill blind holes towards the tree's axis using a non-threaded drill bit, with a hole diameter of 5-8 mm and a depth of 4-5 cm; Arrange the holes in a stepped pattern from bottom to top, with a horizontal distance of 3-4 cm and a vertical distance of 1-2 cm between each hole and the next hole in the same row, and a vertical distance of 5-6 cm between adjacent rows; Introduce the resin-forming agent into the holes, and then apply a protective solution to the hole openings. This method effectively protects the phloem tissue of agarwood trees, achieving resin formation without decay. After resin formation, the heartwood accumulates yellowish-brown or reddish-brown resin, exhibiting a distinct agarwood layer structure, and the agarwood oil contains higher levels of effective components such as agaritol and agarwood aldehyde.

The invention discloses a cotton boll water flux balance equation and a phloem hydraulic conductivity quantification method, and relates to the technical field of plant physiology and agricultural engineering. The method comprises the following steps: measuring the water vapor diffusion conductance of the fruit surface and the hydraulic conductance of the fruit xylem, monitoring the fresh weight and dry weight change of the fruit and the daily change of the water potential of the fruit and the stem, establishing a water flux balance equation of entering and exiting the fruit, and calculating the hydraulic conductance of the phloem. Parameters such as related conductance and osmotic potential are calculated through a formula, the phloem water flux is calculated according to a fruit phloem sugar unloading path selection formula, and then the phloem hydraulic conductance is obtained. The method solves the problem that a systematic quantification method for phloem hydraulic conductivity is lacked in the prior art, can accurately track the moisture flux of the fruits, provides a basis for crop stress-resistant variety breeding and accurate irrigation, and is suitable for fruit crops such as cotton and the like.

The invention discloses a non-destructive edgeworthia chrysantha factor cloning propagation method for agilawood trees, and belongs to the technical field of forestry biology. Aiming at the problems that in the prior art, plants need to be damaged during agilawood formation, the propagation efficiency is low, and agilawood formation characters are unstable, the method comprises the following steps: obtaining agilawood formation key factor genes of the phloem of the lateral root of the agilawood in a non-destructive manner; constructing an edgeworthia chrysantha factor recombinant expression vector containing a phloem specific promoter; non-destructively preparing agilawood axillary buds as an acceptor material; cloning seedlings are formed through agrobacterium tumefaciens-mediated oriented transformation and induction; and carrying out non-destructive edgeworthia chrysantha verification and domestication on the cloned According to the method, non-destructive operation of stock plants and clone seedlings is achieved, the breeding period is short, the agilawood formation character is stable, and technical support is provided for sustainable development of the agilawood industry.

This invention discloses an RNAi recombinant vector resistant to both whitefly and tomato yellow leaf curl virus (TYLCV), its construction method, and its applications. The method involves constructing a DNAβ promoter associated with a geminivirus expressed in the phloem into the RNAi vector pCambia1391, obtaining a 1391::DNAβpro vector backbone. RT-PCR is used to amplify a partial fragment of the whitefly key gene BtACTB, a key region of TYLCV (including the intergenic spacer region for viral replication initiation, some coat proteins, and replication-related proteins), and its inverted repeat sequences. This constructs a recombinant vector with an inverted hairpin structure driven by the phloem promoter, simultaneously targeting key sequences of both whitefly and TYLCV. The constructed recombinant vector is then introduced into tomatoes via Agrobacterium-mediated transformation. Screening yields tomato plants that reduce whitefly survival and inhibit TYLCV infection.

The present specification provides, in one aspect, a method of treating or inhibiting infection of a plant by a plant pathogen. The method includes contacting the plant with an amount of a cranberry composition effective to inhibit the plant pathogen. In another aspect, the present specification provides a composition for treatment of a plant disease. The composition includes a cranberry composition and a carrier that delivers the cranberry composition to at least a portion of a phloem of a citrus plant.

The invention relates to the technical field of plant physiology and ecology monitoring, in particular to a plant stalk carbon sink in-situ measuring device which comprises a split type shell used for being buckled on a plant stalk. A self-adaptive dynamic sealing system is arranged at a port, used for buckling plant stalks, of the split type shell; the self-adaptive dynamic sealing system comprises an inflatable elastic sealing piece and a pressure adjusting unit connected with the inflatable elastic sealing piece through a gas circuit. The invention also relates to a method for measuring the carbon sink of the plant stalk. The method comprises the following steps: closing the split shell on the periphery of the plant stalk to be measured through the two-stage locking mechanism; a dynamic measurement mode is entered; gas exchange data is recorded, and the split type shell is opened; the device can automatically fill gaps generated due to non-uniform stalk thickness and irregular surface texture, ensures airtightness, and ensures that the radial pressure intensity of the plant stalk is always limited in a safe range in which phloem tissues of the plant stalk are not damaged, so that the physiological authenticity of measured data is ensured.