11 results about "Vascular bundle" patented technology

This invention provides a method for freezing strawberries that can reduce the amount of drip that occurs when frozen strawberries are thawed. [Solution] As preparation, a solution containing an ingredient that solidifies into a jelly-like substance at room temperature is prepared. In step 1, strawberries are placed in a vacuum container and the pressure is reduced, causing moisture from inside the strawberries to seep out to the surface through the vascular bundles. In step 2, while maintaining the reduced pressure, the solution containing the ingredient that solidifies into a jelly-like substance at room temperature is brought into contact with the surface of the strawberries. In step 3, with the surface of the strawberries covered with the solution containing the ingredient that solidifies into a jelly-like substance at room temperature, the reduced pressure is released, filling the openings of the vascular bundles on the surface of the strawberries with the solution. In step 4, the strawberries after step 3 are rapidly frozen.

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.

This invention discloses a nano-bandage for preserving cut flowers, belonging to the field of horticultural technology. The nano-bandage consists of a polymer carrier and a bactericide encapsulated therein. The polymer is a mixture of PEG and PDMAEMA. By adjusting the mass fraction and total concentration of PDMAEMA, the particle size of the nanoparticles can be controlled, and their surface can be positively charged. It is prepared using microfluidic co-assembly technology, where the drug-containing organic phase and aqueous phase are instantaneously mixed and purified by dialysis. This nano-bandage actively targets and persistently accumulates on the negatively charged cut surface of fresh cut flowers using electrostatic interactions, forming a physical barrier. It also synergistically inhibits microbial infection through slow-release bactericide and charge adsorption, while its nano-size does not affect vascular function. This invention achieves precise and long-lasting protection for cut flower wounds, significantly extending vase life with extremely low dosage, and has the advantages of high efficiency, safety, and intelligent adjustability.

The application provides application of RanGAP in regulation of symbiotic nodulation. A novel functional gene RanGAP (including RanGAP1 or RanGAP2) is disclosed, which encodes RanGAP protein with important biological function, and the protein is involved in symbiotic nitrogen fixation process of leguminous plants and rhizobium, and the application has significant meaning in genetic improvement of plant traits and soil improvement. An isolated promoter from RanGAP genome (upstream) is also disclosed, which has the function of driving gene-specific expression; more particularly, the promoter drives specific expression of the gene in root vascular bundle, lateral root / nodule primordium.

This invention belongs to the field of plant molecular biology and genetic engineering technology, specifically involving miR396f and / or GRF7 The application of related biological products in improving plant heat resistance. This invention confirms... miR396f This is a heat-inducible miRNA primarily located in the vascular bundles. Its promoter exhibits sequence polymorphisms in the heat-resistant variety HT54 and the heat-sensitive variety HT14, leading to differences in heat stress responses. Through a multi-step screening strategy, this invention identifies and validates for the first time... GRF7 for miR396f A direct target of the rice heat tolerance pathway. Genetic evidence suggests that... miR396f Through negative regulation GRF7 Positive regulation of heat tolerance during the seedling and reproductive stages of rice. This invention discloses... miR396f - GRF7 The module provides important genetic resources for breeding heat-resistant crops.

The application discloses a portable micro-pressure perfusion device for plant vascular bundle injection and belongs to the technical field of micro-pressure perfusion devices. The micro-pressure perfusion device comprises a perfusion device cylinder and a piston rod slidingly connected in the perfusion device cylinder, and the micro-pressure perfusion device is detachably connected with a liquid storage tank. The whole design structure is portable and flexible to use. By holding and releasing the pressure holder, one-time plant vascular bundle perfusion operation can be completed, and one-time automatic absorption of biological medicaments from the liquid storage tank into the perfusion device cylinder can be completed. Through repeated operations, the above operation can be realized for multiple plant vascular bundle injection. The micro-pressure perfusion device solves the problem that the traditional micro-pressure perfusion device needs to repeatedly manually absorb biological medicaments in the process of multiple plant vascular bundle injection, greatly improves the injection efficiency, and through rotation of the adjusting nut, the capacity of the perfusion device cylinder for absorbing biological medicaments at one time can be quickly adjusted, the adjustment of the capacity of biological medicaments for each time of perfusion is realized, and the micro-pressure perfusion device is convenient and practical to use.

The application discloses a method for increasing drought adaptability of plant osmotic regulation substance accumulation, and belongs to the field of plant genetic engineering and drought-resistant molecular breeding. First, a plant to be transformed is combined with 13C-glutamic acid and 15N-choline double isotope labels to quantize carbon and nitrogen flow redistribution of proline synthesis pathways and glycine betaine synthesis pathways in leaf cells and vascular bundle companion cells, and to identify rate-limiting enzyme nodes. Second, a multi-cistronic plant expression vector is constructed. A first expression box is driven by a leaf-specific promoter and a drought response cis-element composite promoter to drive P5CS. A second expression box is driven by a companion cell-specific promoter and a drought response cis-element composite promoter to drive BADH. Positive transformants are obtained through Agrobacterium mediation or gene gun transformation and molecular screening. The expression quantity of the positive transformants is increased by 5 to 50 times under stress and falls back to a baseline within 72 hours of rehydration. Root activity is significantly improved, and yield is preserved.

The application discloses a transcription factor VTP1 regulation stem vascular development and application in improving rape yield, and belongs to the technical field of plant genetic engineering. The application first finds that after overexpression of VTP1, the rape stem diameter and stem vascular bundle number can be significantly increased, and the single plant yield, thousand kernel weight and seed oil content of rape are also significantly improved. Molecular mechanism research finds that VTP1 can directly interact with stem cell development star transcription factor WOX4 to form a molecular regulation module, and then promote the stem vascular tissue development of rape. The application provides the application and corresponding breeding technology of VTP1 in vascular engineering design and rape breeding, and provides a new key target and practical technical scheme for molecular design breeding of high-yield rape, and has important scientific theoretical significance and breeding application value.

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 discloses a bamboo-based MXene / PSSA smart responsive composite membrane with a native anisotropic vascular bundle structure, its preparation method, and its applications. The composite membrane comprises a continuous matrix phase and a functional phase filled within the continuous matrix phase. The continuous matrix phase is an in-situ delignified natural bamboo skeleton, and the functional phase comprises MXene nanosheets and PSSA with a molecular weight of 60,000-80,000 Da. The functional phase forms a continuous interpenetrating network structure in the pores of the bamboo skeleton. This invention also provides a bamboo-based MXene / PSSA oriented bending responsive composite membrane with an asymmetric functional phase component concentration gradient in the thickness direction. The composite membrane obtained by this invention possesses high axial tensile modulus, sub-second wet / heat response speed, and excellent cycling stability. Furthermore, the preparation process is green and low-carbon, making it suitable for applications such as flexible sensors, respiration monitors, bending actuators, soft actuators, or environmental energy harvesters.

This utility model relates to the technical field of biomass material performance testing devices, and provides a biomass vascular bundle pull-out test device, including: a test chamber; an environmental adjustment module for adjusting environmental parameters within the test chamber; and a pull-out module, disposed within the test chamber, including a first pull body and a second pull body arranged opposite to each other and capable of approaching or moving away from each other; the first pull body is used to clamp one end of the sample; the second pull body is provided with a slot, the slot having a relatively small opening on the side of the second pull body facing the first pull body, and the opening penetrating one side of the second pull body to form a notch, the slot being used to clamp the other end of the sample. This design effectively reduces sample slippage and damage to the vascular bundle, while simultaneously adjusting the environmental parameters within the test chamber in real time during the test to maintain a constant testing environment, thereby improving the accuracy and reliability of the test results.