6 results about "Biological Stress" patented technology

The application provides a corn new variety breeding cultivation device and cultivation method, relates to the corn variety breeding technical field, and includes a support platform, which is arranged with multiple groups of cultivation bins in an array; the cultivation bin is slidably connected to the support platform through a driving mechanism, and a HEPA filter screen is connected to the cultivation bin; both sides of the cultivation bin are provided with observation windows, and multiple observation mechanisms are arranged on the support platform; the front end of the cultivation bin is provided with a docking mechanism; the bottom of the front end and the bottom of the rear end of the cultivation bin are respectively provided with abutment mechanisms; the front end and the rear end of the cultivation bin are respectively provided with opening and closing mechanisms; the cultivation bin is provided with an environment simulation mechanism; the cultivation bin is connected with a stress application window; the application integrates multiple environment simulations, multiple stress applications, automatic observation and unit recombination, greatly improves the breeding efficiency, realizes the simulation of different regional soil-climate conditions, can accurately combine multiple biological and non-biological stresses, and speeds up the breeding process of the corn new variety.

This invention discloses an early detection and evaluation method and system for the abiotic stress tolerance of new forest tree germplasm. The method includes: collecting chlorophyll fluorescence indicators, phenotypic indicators, and physiological and biochemical indicators of forest trees under abiotic stress conditions, and performing data cleaning and standardization; performing principal component analysis on the multi-source standardized dataset to screen candidate indicators; performing grey relational analysis using the comprehensive score of forest tree stress tolerance as a reference sequence and the candidate indicators as a comparison sequence; determining the core indicators and their weights based on the variance contribution rate of the principal component analysis and the correlation degree of the grey relational analysis; obtaining the abiotic stress assessment index from the core indicators using a membership function; and classifying the tolerance level of forest tree germplasm using a clustering algorithm based on this index. This invention achieves early, rapid, and accurate evaluation of the abiotic stress tolerance of forest tree germplasm, and can effectively guide forest tree stress resistance breeding work.

This invention belongs to the field of biological control technology for agricultural diseases, specifically disclosing a method for controlling root rot of Panax notoginseng based on ricinoleic acid. Specifically, this invention provides the application of ricinoleic acid in inhibiting root rot pathogens, wherein the pathogens are... Fusarium oxysporum、Fusarium solani or Ilyonectria vredhoekensis The ricinoleic acid provided by this invention can not only effectively control root rot in Panax notoginseng, but also significantly improve the physiological state of plants under heavy metal and biological stress, and enhance the overall stress resistance and yield of Panax notoginseng. It has outstanding advantages and application potential as a multi-effect, environmentally friendly green plant protection product.

The application belongs to the technical field of plant genetic engineering, and particularly relates to application of LOC_Os01g34560 gene and coded protein thereof in breeding high-temperature-resistant rice; the gene and the coded protein thereof are involved in high-temperature non-biological stress regulation in the flowering stage of rice, and affect the rice yield by affecting the seed setting rate; LOC_Os01g34560 is edited by using a conventional method, so as to change the expression level of the gene, and then new rice germplasm with different expression levels of LOC_Os01g34560 gene is obtained; the rice created by the application has no significant difference in the growth and development of plants and other agronomic characters compared with the parent control, but significantly affects the seed setting rate under high-temperature non-biological stress; the application provides a useful gene resource for genetic improvement of sterile lines, and has important breeding utilization value.

The application discloses application of long-male wild rice OlARF9 gene in improving rice resistance to low-oxygen stress and belongs to the field of bioengineering. The long-male wild rice OlARF9 gene is overexpressed in rice by using overexpression technology, and it is found according to phenotype changes of transgenic plants that overexpression of the OlARF9 gene in rice can significantly improve the ability of the rice to resist low-oxygen stress, and therefore, the long-male wild rice OlARF9 gene can be applied to improving the non-biological stress resistance of the rice, including overexpression of the long-male wild rice OlARF9 gene in the rice to obtain a transgenic plant, and the obtained transgenic plant has obviously enhanced resistance to low-oxygen stress. The application has application prospects in aspects of improving and enhancing the stress resistance of the rice and accelerating the process of stress resistance molecular breeding.

The present application relates to natural system simulation technical field, specifically to a mountain park ecological restoration digital twin method and system, in the present application, by constructing multi-directional elevation profile sequence and calculating micro-landform fractal dimension, combining with ellipse fitting technology to generate roughness tensor matrix, accurately quantifying the structural difference of micro-landform in different directions, using water flow velocity vector projection in roughness tensor to analyze equivalent fractal dimension, realizing accurate calculation of surface runoff resistance coefficient dynamic response with flow direction, thereby significantly improving the solving accuracy of hydrodynamic equation under complex terrain, at the same time, introducing environmental biological stress intensity index, based on spatial Euclidean distance as distance attenuation factor and interspecific competition coefficient weighted summation, deeply coupling physical habitat hydrodynamic condition and biological community interspecific competition mechanism, using biological stress correction state transition probability, realizing dynamic prediction of vegetation community succession path.