14 results about "Chilling injury" patented technology

This invention belongs to the field of post-harvest quality testing technology for agricultural products, specifically relating to a method for predicting the degree of chilling injury in bitter gourd. The method uses *Bitter Gourd 'Du Ruan'* as the research object, employing segmented pre-cooling treatment to measure indicators such as chilling injury index, respiration rate, weight loss rate, firmness, chlorophyll content, malondialdehyde content, and antioxidant enzyme activity during storage. This determines suitable pre-cooling conditions, explores the impact of different pre-cooling settings on its physiological quality and chilling injury development during storage, and constructs a bitter gourd chilling injury prediction model based on key indicators. The method for predicting the degree of chilling injury in bitter gourd provided by this invention offers a theoretical basis and technical support for optimizing post-harvest cold chain processes for bitter gourd, mitigating low-temperature damage, and extending shelf life.

The present invention provides a special cold-tolerant regulator for cotton seedling stage, its preparation method and application method, belonging to the technical field of crop cultivation. The special cold-tolerant regulator for cotton seedling stage includes chlorophyllin iron and chitosan; the mass ratio of chlorophyllin iron to chitosan is 28-38:500-700. The preparation method of the present invention includes the following steps: (1) Mix chlorophyllin iron with water to obtain solution A; (2) Mix chitosan with glacial acetic acid solution and dissolve to obtain solution B; (3) Add solution A to solution B, and make up the volume with water to obtain the special cold-tolerant regulator for cotton seedling stage. The application method of the present invention is to perform foliar spraying before the occurrence of chilling injury from the cotyledon stage to the five-leaf stage of cotton seedlings. Applying the cold-tolerant regulator prepared by the present invention before the occurrence of chilling injury in the cotton seedling stage can significantly reduce the chilling injury index of cotton seedling leaves and improve the survival rate of cotton seedlings.

The invention belongs to the technical field of postharvest preservation of fruits and vegetables, and particularly relates to a treatment method for relieving cold injury of postharvest mangoes, which comprises the following steps: treating mango fruits with an n-butyl alcohol aqueous solution, air-drying, and storing in a low-temperature environment. The cold injury index of the mangoes can be remarkably reduced through n-butyl alcohol treatment, and symptoms such as black spots are relieved; related enzyme activity is inhibited, and cell membranes are protected; the activity of antioxidant enzyme is improved, and the oxidation resistance is enhanced; energy metabolism is regulated and controlled; and the expression level of membrane lipid degradation genes can be lowered, and the expression level of resistance genes can be increased.

The invention discloses a method for relieving cold injury of tobacco seedlings. After low-temperature stress, the compound solution of catechin and abscisic acid is sprayed to the tobacco seedlings, so that the activity of SOD and CAT is improved, and the content of H2O2, OFR and MDA is remarkably reduced. According to the technical scheme, the cold resistance of the tobacco seedlings can be effectively improved, and the method has the advantages of being convenient to use, green, safe and the like.

The invention discloses a fresh-keeping system applied to fresh Chinese prickly ash, and belongs to the technical field of agricultural product postharvest fresh-keeping. Aiming at the technical problems that an existing preservation method is difficult to consider precooling safety, precise control and dynamic maintenance of a gas environment, cold damage and gas damage are easily caused and the preservation effect is unstable, the method is characterized in that physiological stress signals are monitored through a gradient precooling unit, and fresh peppers are safely cooled to a target storage temperature; a low-oxygen and high-carbon-dioxide initial fresh-keeping gas environment is replaced and established in the unlocked intelligent fresh-keeping container through a gas environment initialization module, and locking of the intelligent fresh-keeping container is completed in the atmosphere; and through a fresh-keeping state dynamic maintaining module, according to the real-time change of oxygen and carbon dioxide concentration in the container and the breathing intensity trend, a two-way fine adjustment air valve on the box cover is intelligently controlled to carry out air exchange adjustment. The system is mainly used for post-harvest storage and logistics links of respiration climacteric agricultural products such as fresh peppers and the like, and aims to prolong the fresh-keeping period and maintain the excellent quality of the fresh peppers and the like.

The invention relates to a sweet potato cold-damage-resistant fresh-keeping method with synchronization of heat treatment and composite coating, which comprises the following steps: (1) selecting and grading raw materials; (2) heat treatment and composite coating: completely immersing disinfected sweet potatoes in a treatment tank filled with a composite coating solution, accurately maintaining the temperature of the solution in a range of 48-50 DEG C, (3) cooling and film-forming drying: immediately transferring the treated sweet potatoes into a forced cold air environment at 15-20 DEG C, and drying; then, drying is performed at the temperature of 25-30 DEG C; and (4) packaging and warehousing. According to the method provided by the invention, the anti-cold-damage fresh-keeping effect is remarkable, after the sweet potatoes are treated in the whole process, the sweet potatoes are refrigerated for 60 days at the temperature of 5 + / -0.5 DEG C, the cold damage index is reduced by 50% or above, the MDA content is remarkably reduced, and the integrity of a cell membrane structure is effectively maintained. In addition, thermophysical sterilization and natural antibacterial components have a synergistic effect, and the rotting rate is controlled within 10%; the formed protective film can effectively inhibit water transpiration, and the weight loss rate is controlled within 5%.

The application discloses application of molybdenum disulfide nanomaterial in crop cold damage regulation and belongs to the technical field of cold resistance agents. The molybdenum disulfide nanomaterial is dispersed in water to obtain a suspension; and then the suspension is sprayed on corn and soybean leaves, and the cold resistance of the corn and the soybean is regulated through the leaf surface spraying mode, so that the biomass of the cold-damaged corn and the cold-damaged soybean is increased, and the application prospect is excellent.

The invention discloses receptor-like kinase MaHPCA1 and application thereof in relieving banana cold injury, and relates to the field of plant genetic engineering. According to the application disclosed by the invention, homologous genes MaHPCA1-1 and MaHPCA1-3 in two leucine-rich repeat receptor-like kinase gene families are found from bananas, and the generation of hydrogen peroxide, superoxide anions and malondialdehyde can be inhibited by overexpressing the MaHPCA1-1 and MaHPCA1-3 in banana peels, so that the cold injury symptom of the banana fruits is relieved; the cold resistance of the banana fruits under the postharvest low-temperature storage condition is improved, and the storage period of the banana fruits is prolonged.

This invention relates to the application of iron dihydroporphyrin in low-temperature resistance of oilseed and vegetable crops, and methods for achieving low-temperature resistance. The low-temperature protection agent for oilseed and vegetable crops includes iron dihydroporphyrin; the method for low-temperature resistance of oilseed and vegetable crops includes treating them with iron dihydroporphyrin. Its advantages lie in the fact that the iron dihydroporphyrin-containing plant low-temperature resistance regulator of this invention has a certain stress resistance effect on oilseed and vegetable crops, can reduce the chilling injury index of oilseed and vegetable crops, and provides a new approach and reference for improving the low-temperature resistance of oilseed and vegetable crops.

This invention relates to the field of fresh food preservation control technology, and discloses a fresh food preservation control system based on osmotic pressure synergistic low-temperature barrier, comprising: a category parameter locking module for acquiring and fixing the category parameters of the current batch of fresh food; a first-test conversion and evaluation module for collecting ambient temperature and humidity, calculating ambient water activity and effective osmotic pressure difference; a priority path determination module for determining the priority control path based on the inhibition degree gap sign and the upper limit of the chilling injury temperature window; a main variable correction module for adjusting temperature and humidity according to the priority path and verifying inhibition degree and osmotic pressure difference; a secondary variable fine-tuning module for fine-tuning secondary variables according to category parameters and verifying inhibition degree and osmotic pressure difference; a patrol limit module for verifying osmotic pressure difference and adjusting temperature and humidity; and a disturbance switching verification module for returning to the first-test conversion and evaluation module during disturbances and performing batch parameter verification. This invention achieves precise preservation control of fresh food during low-temperature storage, extending shelf life and maintaining stable quality.

This invention proposes a magnetic field-coupled low-temperature pre-storage preservation method for mitigating chilling injury during peach storage. During the low-temperature pre-storage process, a static magnetic field is coupled, which can be achieved using an external magnetic field on existing refrigeration equipment. This eliminates the need for significant modifications to existing refrigeration equipment, saving on equipment and time costs. The magnetic field-coupled low-temperature treatment method does not involve the use of chemical preservatives, thus avoiding food safety issues. It is a chemical-free, simple, efficient, green, and safe method for controlling chilling injury during peach storage. It does not require highly skilled operators, facilitating the widespread application of this invention.

The invention discloses a cucumber CsEIN2 gene and an application of the cucumber CsEIN2 gene in regulating and controlling the cold resistance of cucumbers. The cucumber CsEIN2 gene is identified for the first time, a CDS sequence of the cucumber CsEIN2 gene is cloned from a cucumber full-length cDNA library, a gene editing carrier pCas9-CsEIN2 targeting the CsEIN2 gene is constructed on the basis of the CDS sequence, the plasmid is transformed into the cucumber to obtain a CsEIN2 gene modified plant, and through field cross pollination, molecular identification and phenotype identification, the CsEIN2 gene modified plant is obtained. It is proved that the CsEIN2 gene has the function of regulating and controlling cucumber cold stress resistance, the regulation and control are positive regulation and control, and when the function of the CsEIN2 gene is lost or weakened, the cold damage index of the cucumber is remarkably increased, and the cold resistance is reduced. The invention lays a foundation for revealing genetic and biological mechanisms of cucumber cold resistance, provides a new gene resource for cultivation of cold-resistant cucumbers, and has important significance for research on cucumber cold resistance and breeding of new low-temperature-resistant varieties.

The application discloses a receptor-like kinase MaHPCA1 and application thereof in relieving banana chilling injury, and relates to the field of plant genetic engineering. Two homologous genes MaHPCA1-1 and MaHPCA1-3 in a leucine-rich repeat receptor-like kinase gene family are found from banana, and overexpression of MaHPCA1-1 and MaHPCA1-3 in banana peel can inhibit the generation of hydrogen peroxide, superoxide anion and malondialdehyde, and further relieve banana fruit chilling injury symptoms, improve the cold resistance of banana fruit under postharvest low-temperature storage conditions, and prolong the storage period of banana fruit.

The invention relates to a food preservation control method, a storage box body and a refrigerator. The method comprises the steps of obtaining storage conditions of food types, and preprocessing state parameters of a storage box body based on the storage conditions; the gas with the same volume in the storage box body is extracted to enter any slow release cabin, gradient cooling is conducted on the storage box body, and the gas in the storage box body is extracted to enter the other slow release cabins based on the first extraction sequence after each time of cooling; after the nitric oxide gas is released in the slow-release cabins, the storage box continues to be subjected to gradient cooling, and after cooling is conducted every time, the nitric oxide gas in the slow-release cabins is extracted based on a second extraction sequence to sequentially enter the storage box; and controlling the storage box body to sequentially introduce oxygen and humidity atomized gas until the concentration of the nitric oxide gas and the concentration of the nitrogen dioxide gas are respectively lower than the corresponding target concentrations, and then cooling the storage box body. The food fresh-keeping device is more beneficial to preventing food from cold damage at low temperature, the fresh-keeping efficiency is improved, generated harmful gas can be oxidized and absorbed, and the safety is improved.