18 results about "Xylem" patented technology

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.

This invention discloses a vascular bundle-targeted bio-selenium nanoparticle, its preparation method, and its application, belonging to the field of plant treatment technology. The invention involves mixing and dissolving bio-selenium nanoparticles, water, 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride, and N-hydroxysuccinimide, followed by activation to obtain an activated bio-selenium nanoparticle solution. A xylem-anchored peptide and MES buffer are then mixed and dissolved to obtain a xylem-anchored peptide solution. The activated bio-selenium nanoparticle solution and the xylem-anchored peptide solution are mixed, and the pH is adjusted to 6.3-6.8 before stirring to obtain the vascular bundle-targeted bio-selenium nanoparticle. The vascular bundle-targeted bio-selenium nanoparticle provided by this invention achieves interception of heavy metal transport pathways by specifically anchoring to xylem vessels. Compared with existing technologies that rely solely on broad-spectrum physiological antagonism, its efficiency in reducing heavy metal content in crop stems and leaves represents a qualitative leap.

The application relates to the technical field of detection, in particular to a preparation method of sapwood section of Picea smithiana wood; the method comprises the following steps: fixing the sapwood sample of Picea smithiana after trimming in a fixing solution, softening the fixed sapwood sample of Picea smithiana in an ethylenediamine solution for 5-6 days, slicing the sapwood sample of Picea smithiana after the softening is completed, bleaching, washing and dyeing and eluting the sapwood section of Picea smithiana, making the section of the sapwood sample of Picea smithiana transparent by using an ethanol and xylene mixed solution, and sealing and shooting the section of the sapwood sample of Picea smithiana; the application increases the contact area of the sample with the FAA solution and the ethylenediamine solution, accelerates the fixing and softening speed of the sample, shortens the softening time from one month to 5-6 days, and realizes the rapid and efficient preparation of the sapwood section of Picea smithiana wood.

This invention discloses a method for separating the woody parts and leaves of trees from point clouds based on a saliency model, specifically implemented according to the following steps: Step 1, calculate the saliency of each point in the tree point cloud, and divide the points in the tree point cloud into non-saliency points and saliency points according to the saliency; Step 2, extract trunk points and branch points from the non-saliency points to obtain a skeleton point set including trunks and branches; Step 3, construct a tree skeleton based on the skeleton point set; Step 4, complete the tree skeleton obtained in Step 3 to achieve the final separation of the woody parts and leaves. This invention can improve the accuracy of separating the woody parts and leaves and the continuity of skeleton extraction in complex tree structures.

This invention provides a SNP molecular marker related to Pseudomonas recruitment in cucumber and its application, belonging to the field of microbial technology. The SNP molecular marker is closely related to the enrichment of Pseudomonas in cucumber. Haplotype cucumbers with the SNP molecular marker CCA recruit Pseudomonas more efficiently than haplotype cucumbers with the SNP molecular marker TTG, increasing the abundance of Pseudomonas in the xylem. This invention further demonstrates that by applying a *Pseudomonas chrysogenum* inoculant to different haplotype cucumbers, the *Pseudomonas chrysogenum* inoculant significantly increases the number of *Pseudomonas chrysogenum* in haplotype cucumbers with the SNP molecular marker CCA, more significantly promoting cucumber growth and increasing plant height, stem diameter, leaf area, fresh weight, dry weight, and the content of 4-methylene glutamine.

This invention discloses a method for measuring cavitation in plant xylem, comprising: calculating image parallax in an image sample set and recovering scene depth information; extracting the center line of the main stem based on the segmentation results of the main stem; determining the two-dimensional pixel coordinates of the target vibration measurement point above the plant roots along the direction of the center line of the main stem; and calculating the three-dimensional spatial position of the target vibration measurement point by combining the scene depth information corresponding to the target vibration measurement point; automatically coarsely aligning the target vibration measurement point above the plant roots; obtaining the optimal alignment posture of the laser Doppler vibrometer; collecting vibration signals from the target vibration measurement point above the plant roots; and measuring the cavitation in the plant xylem using the collected vibration signals. This invention addresses the problems of manual reliance, low efficiency, poor repeatability, and unstable signal quality caused by on-site interference in existing technologies for measurement point identification and LDV alignment, and achieves automatic positioning, automatic alignment, and cavitation event measurement of the position above the plant roots.

This invention discloses a full-cycle digital management and control system for multiple varieties of rare Chinese medicinal herbs, belonging to the field of digital technology for Chinese medicinal herbs. The system includes the following steps: collecting hyperspectral cubic data of plants and soil water potential time series data; generating a non-uniform pulsed micro-stress control matrix based on a twin model; collecting acoustic emission events of xylem vessel cavitation, and re-watering via a drip irrigation solenoid valve driven by a dry contact when the event rate exceeds a limit; performing joint scanning of medicinal herb samples, extracting biochemical topology, and generating biological intrinsic hash values ​​for on-chain processing; collecting two-dimensional near-infrared and multispectral data of medicinal herb fragments, then retrieving moisture content and performing inverse expansion registration, and verifying the results with the on-chain biochemical topology through tomographic matching. This method achieves closed-loop management and control of Chinese medicinal herbs from induction, boundary control, fresh-state database construction to end-point ownership confirmation, enhancing the consistency between source information and physical samples, and thus improving the accuracy of authenticity verification in dried sliced ​​state.

The application discloses silica nanoparticles and a preparation method and application thereof, and the preparation method comprises the following steps: taking tetraethyl orthosilicate and (3-aminopropyl) triethoxysilane as a silicon source precursor, and through a reverse microemulsion method, the tetraethyl orthosilicate and the (3-aminopropyl) triethoxysilane are subjected to a co-hydrolysis and condensation reaction to obtain plant-degradable silica nanoparticles; wherein the volume ratio of the tetraethyl orthosilicate and the (3-aminopropyl) triethoxysilane is 20:7-28. By introducing an amine propyl in the process of synthesizing nano-silica particles, the application remarkably improves the dissolution rate of the nano-silica particles in a plant xylem simulation solution (a weak acid environment), and can continuously and efficiently provide absorbable orthosilicic acid for plants, and the effect is much better than that of unmodified silica nanoparticles and traditional sodium silicate.

This invention discloses a disease-resistant and growth-promoting strain of *Streptomyces oryzae* P9-1 and its applications. *Streptomyces oryzae* P9-1 has the accession number CGMCC No. 36797 at the China General Microbiological Culture Collection Center. This strain exhibits typical actinomycete characteristics, excellent salt tolerance, and possesses multiple enzyme activities and potassium-solubilizing activities. Antagonism tests show that this strain has significant inhibitory effects on *Alternaria maculata*, the pathogen of apple tree rot, and *Alternaria spp.*, the pathogen of apple leaf spot. Growth-promoting tests show that this strain can significantly increase the plant height, stem diameter, fresh weight, and various root morphological indicators of maize seedlings. This strain can be used to prepare biocontrol agents for apple diseases and growth-promoting agents for maize, possessing dual application value in both biological control and crop growth promotion.

This invention relates to the field of soil fertility technology, specifically to a method and system for comprehensive detection of the fertilizer efficacy of multi-element compound fertilizers in southern double-cropping rice areas. The method includes the following steps: obtaining the redox potential level to determine the reduction state classification; combining the diffusion constant to determine the nutrient release boundary; analyzing the ion antagonism strength to obtain the effective chelation potential energy; using the xylem pressure difference to determine the vascular bundle node transport conductance parameters; analyzing the release rate and chelation potential energy to determine the theoretical nutrient flux; determining the physiological intensity through calcium ion pulses; comparing deviations; and calculating a score. In this invention, by coupling soil reduction classification, fertilizer release boundary, rhizosphere chelation efficiency, and plant transport conductance multi-dimensional parameters, a correlation model from soil environment to plant physiology is established. Real-time physiological feedback signals are used to perform dynamic weight allocation and normalization processing, improving the matching degree between evaluation results and actual growth response, and achieving high-frequency and accurate quantification of the efficacy of multi-element compound fertilizers.

This invention proposes a trunk respiration measurement device and method. The device includes a wrapping ring, a carbon dioxide concentration measuring element, and a flow detection element. The wrapping ring is a sealing ring disposed on the outer periphery of the trunk body, forming a sealed cavity. The inlet and outlet of the carbon dioxide concentration measuring element are respectively connected to the sealed cavity. The flow detection element has three probes, the ends of which are inserted into the effective sapwood layer of the trunk body. Along the axial direction of the trunk body, the middle probe is a heating probe, and the two probes on either side are temperature detection probes. This invention can simultaneously obtain the carbon dioxide outflow flux from the bark and the carbon dioxide carrying capacity of the xylem sap. When performing actual trunk respiration measurements, it considers both the carbon dioxide outflow flux from the bark and the inorganic carbon flux of the xylem sap, thereby correcting measurement deviations and improving the accuracy of the trunk respiration measurement.

The invention relates to a method for efficiently preparing and converting immature xylem protoplast of catalpa bungei. The invention particularly relates to an enzyme solution for preparing immature xylem protoplast of catalpa bungei as well as a preparation method and a conversion method of the enzyme solution. The preparation method provided by the invention can realize efficient preparation and conversion of the protoplast.

This invention belongs to the field of non-destructive testing technology for the internal structure of agricultural and forestry trees. Its purpose is to provide an intelligent scanning transmission detection system and method for the bark-xylem interface. The system includes a host computer, an X-ray beam-limiting scanning detection unit, and a walking mechanism. The host computer intelligently controls the walking mechanism, which in turn coordinates with the X-ray beam-limiting scanning detection unit to perform local transmission scanning of the bark along a preset path. The method includes: based on preset scanning requirements, intelligently and synchronously controlling the walking mechanism and the X-ray beam-limiting scanning detection unit to perform local high-speed, high-stability, and high-precision transmission imaging of the tree; processing the X-ray transmission image group according to an intelligent algorithm; and constructing a three-dimensional contour coordinate model of the internal perspective features of the bark-xylem interface at the tens of micrometer level. This invention can achieve high-resolution, low-energy-consumption, and low-damage transmission detection of the bark-xylem interface while ensuring tree safety, for applications in rubber tapping, live detection of forest pests and diseases, and other fields.

This invention relates to the field of plant water source ratio calculation technology, and discloses a normalized method for calculating the plant water source ratio, comprising the following steps: S1, data acquisition, determining the isotopic composition of xylem water and soil water in each layer through stable water isotope analysis; S2, contribution ratio calculation, calculating the contribution ratio of each soil layer to plant water; S3, water source score calculation, calculating the water source score WSS according to the formula; S4, evaluation and application, constructing the relationship with ecosystem variables through the WSS score. By normalizing the water source score WSS value from 0 to 1, and eliminating absolute depth differences through mathematical standardization, the research results of different regions or different soil stratification schemes are directly comparable, thereby solving the defect of traditional methods that cannot be compared horizontally due to the subjectivity of depth boundaries, and realizing an objective comparison of the degree of plant deep water dependence across regions.

1. Name of the product in this design: Graphical User Interface for Displaying the Fragility Curves of Plant Xylem in Electronic Devices. 2. Purpose of this design: An electronic device. 3. The key design features of this product are its graphical user interface. 4. The image or photograph that best illustrates the design's key features: the front view. 5. Use of the graphical user interface: for displaying the fragile curves of plant xylem.

This invention relates to the field of tree vigor restoration technology, specifically to a method for promoting the rejuvenation of ancient Torreya grandis trees, comprising the following steps: S1, timing of operation: performing rejuvenation girdling at the end of the dormant period of the ancient Torreya grandis tree until before bud break; S2, pretreatment of the operation area: cleaning the surface of the phloem area to be girdled in the upper part of the trunk of the ancient Torreya grandis tree, removing rotten bark and debris, and then disinfecting; S3, girdling of the phloem: in the upper part of the pretreated trunk of the ancient Torreya grandis tree, setting two semi-circular girdling cracks that are axially spaced apart and circumferentially staggered by 180° along the trunk circumference, the width of the girdling cracks is 5-6 cm, the girdling depth penetrates the phloem but does not damage the xylem, and the instantaneous phloem cut rate after girdling is less than 50% of the trunk circumference; S4, post-girdling protection and maintenance: applying an antiseptic and moisturizing agent to the phloem cracks formed by girdling to complete the rejuvenation and protection treatment after girdling.

This invention discloses the application of the Masson pine PmVNS2 gene, belonging to the field of plant genetic engineering technology. The invention obtains the Masson pine PmVNS2 gene through cloning, its nucleotide sequence is shown in SEQ ID NO.1, and its expressed protein sequence is shown in SEQ ID NO.2. The invention constructs a plant expression vector 35S::PmVNS2 and transforms it into poplar leaves, cultivating and screening to obtain poplar PmVNS2 transgenic plants. Compared with control plants, the number of roots, plant height, and ground diameter are significantly increased. Real-time quantitative PCR revealed that PmVNS2 significantly promotes the upregulation of expression levels of most key enzyme genes and transcription factor encoding genes in the secondary xylem synthesis of poplar; further scanning electron microscopy results show that the number of secondary xylem cell layers and the cell wall thickness in heterologously expressed transgenic poplar are significantly increased. This invention provides an effective molecular tool and method for improving poplar traits and has broad application prospects.