Affiliation:
1. College of Agronomy, Sichuan Agricultural University, Ya’an 625014, China
2. Sichuan Engineering Research Center for Crop Strip Intercropping System, Chengdu 611130, China
3. Key Laboratory of Crop Ecophysiology and Farming System in Southwest China, Ministry of Agriculture, Chengdu 611130, China
Abstract
The plant architecture of higher plants is regulated through environmental and genetic factors, as well as phytohormones. Phytohormones play a critical role in regulating shoot branching. We determined the branching phenotype of D16 and N99-6, the content of strigolactones, the genetic expression level, and the interaction between auxin and strigolactones. We found that the branching development of the two soybean varieties under shading was significantly slower than that under normal light. The average branch length of N99-6 decreased by 40.9% after shading; however, the branch length of D16 was not significantly affected. Meanwhile, the branch formation rate in D16 was significantly higher than in N99-6. In addition, after shading treatment, the content of strigolactones in D16 and N99-6 axillary buds increased significantly, and the expression of phytochrome genes, PhyA and PhyB, showed opposite changes. However, strigolactone synthesis gene GmMAX4 and signal transduction gene GmMAX2 expression levels of D16 were lower than those of N99-6 after 24 h of shading. In addition, the application of strigolactone inhibitor TIS108 and auxin inhibitor NPA to soybean had no significant effect on the branch phenotype. The expression of the GmMAX2 gene was significantly up-regulated after the external application of the auxin analog, and the expression of auxin transporter gene GmPINI was significantly down-regulated after external application of the strigolactone analog under shade. In this study, we investigated the adverse effect of shade on soybean branching development, which may be due to the interaction of strigolactones with auxins.
Funder
National Natural Science Foundation of China
Sichuan Innovation team Project of National Modern Agricultural Industrial Technology system
Subject
Agronomy and Crop Science
Reference69 articles.
1. The microworld behind high yield of soybean;Han;Grain Sci. Technol. Econ.,2020
2. Environmental sustainability challenges of China’s edible vegetable oil industry: From farm to factory;Bai;Resour. Conserv. Recycl.,2021
3. Intercropping: Feed More People and Build More Sustainable Agroecosystems;Yang;Front. Agric. Sci. Eng.,2021
4. Designing intercrops for high yield, yield stability and efficient use of resources: Are there principles?;Stomph;Adv. Agron.,2019
5. Effects of Shade and Light Recovery on Soybean Cultivars (Lines) and Its Relationship with Yield in Relay Strip Intercropping System;Wu;Acta Agron. Sin.,2015
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献