Research Progresses on the Mechanism of Salinity and Drought Affecting Root Morpho-physiology and Yield Formation of Rice
Received date: 2022-11-26
Online published: 2023-05-23
At present, China is vigorously developing and utilizing coastal beaches to promote rice production. The rice production along the coastal beach is limited by freshwater resources and water conservancy infrastructure, which resulted in salinity-drought combined stress and seriously restricts the realization of the goal of a high and stable yield of rice in coastal beaches. The root system is the primary organ for plants to perceive salinity damage and drought stress, which is also the most important and direct damaged part. A comprehensive understanding of the effects of salinity damage, drought stress, and their combined stress on rice root morphology and physiology and their internal relationship with yield formation can provide scientific support for high-yield rice cultivation in coastal beaches. This paper summarized the effects of salinity damage, drought stress, and their combined stress on the morphological structure, physiological activity, and yield formation of rice roots, expounded the mechanism of their effects on rice root growth and yield formation from the aspects of osmotic regulation, ion balance, photosynthesis, antioxidant enzyme system, and endogenous hormones, and discussed the regulatory measures to alleviate rice salinity damage and drought stress. Finally, some suggestions were put forward for further research on the effects of salinity-drought combined stress on rice root growth and yield formation in the future.
Key words： rice; salinity stress; drought stress; salinity-drought combined stress; root
ZHU Wang, ZHANG Xubin, GENG Xiaoyu, CHEN Yinglong, DAI Qigen, ZHOU Guisheng, WEI Huanhe, MENG Tianyao . Research Progresses on the Mechanism of Salinity and Drought Affecting Root Morpho-physiology and Yield Formation of Rice[J]. China Rice, 2023 , 29(3) : 34 -40 . DOI: 10.3969/j.issn.1006-8082.2023.03.006
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