Genes that regulate the number of nodules in root nodule plants and their application in efficient nitrogen fixation

Abstract

The present invention relates to a gene regulating the number of nodules of nodule plants and its application in efficient nitrogen fixation. The inventors cloned a new gene for the first time: Rac1 gene. Functional analysis showed that the gene or its regulatory molecules were closely related to the number of nodules in rooted plants. Therefore, the gene can be applied to plant improvement to obtain plants with altered root nodule traits and nitrogen fixation traits.

Description

technical field

[0001] The present invention belongs to the fields of biotechnology and botany; more particularly, the present invention relates to a gene regulating the number of nodules of nodule plants and its application in efficient nitrogen fixation. Background technique

[0002] Nitrogen is a macronutrient essential for plant growth and a limiting factor in agricultural production. At present, more than half of the world's food is obtained through the application of chemical fertilizers (especially nitrogen fertilizers), and 40 to 60% of crop yields (even up to 90% in tropical soils) are also attributed to the use of nitrogen fertilizers. Excessive use of nitrogen fertilizers not only increases the Production costs, but also a heavy burden on the environment. About 40% are not directly deaminated by plants using nitrogen fertilizers to form N every year 2 returning to the atmosphere, resulting in a serious waste of energy and resources; secondly, the N produced by t...

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