Application of Arabidopsis thaliana SAL gene on regulating flowering time and amount of rosette leaves

Abstract

The invention provides application of an Arabidopsis thaliana SAL gene on regulating flowering time and amount of rosette leaves. By analyzing phenotype of a loss-of-function mutant homozygous plant of SAL1 / 2, as for single mutants sal1 and sal2 as well as a double mutant sal1sal2, compared with a wild type Col-0, the phenomena that the flowering times are all shortened by about 7 days, the amounts of the rosette leaves are added by 2-3 leaves during flowering, and the growth speeds of stalks after flowering are rapider. An obvious difference occurs between a flowering phenotype of an SAL1 / 2 mutant and normal early blossoming phenotype, i.e. the amount of the rosette leaves is added, and report on the phenotype does not exist; and through phenotypes of the SAL2 mutant and an overexpression plant, the function can be speculated to be of limiting too fast growth of the plant, and a study result of the gene function has the guiding significance of breaking through a neck bottle of increasing the crop yield.

Description

technical field [0001] The invention belongs to the field of biotechnology, and in particular relates to the application of Arabidopsis thaliana SAL gene in regulating flowering time and rosette leaf quantity. Background technique [0002] In flowering plants, the transition from vegetative to reproductive growth, anthesis, is the most critical stage of plant development. In agriculture, the timing of flowering largely determines the quantity and quality of seeds and fruits. The flowering of plants is affected by a series of environmental and endogenous factors, such as daylight length, circadian clock and gibberellin, etc., and the time of flowering is regulated by a complex gene regulatory network in vivo. Most of the genetic studies on plant flowering focus on the model plant Arabidopsis thaliana, and then apply the corresponding research results to other economic crops, such as rice, soybean and corn, which greatly improve the economic traits of crops and the adverse ef...

AI Technical Summary

Problems solved by technology

For a long time, plants have been considered to have a trade-off between vegetative and reproductive growth, and therefore crop yields are considered to have an upper limit, because crops with early flowering are relatively deficient in basic vegetative growth (fewer leaves, photosynthetic products low volume) resulting in low yield

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