Vol. 6, Issue 4 (2018)
Responses of rice under salinity stress: A review
Author(s): BS Thorat, TA Bagkar and SM Raut
Abstract: Rice (Oryza sativa L.) is an important staple crop that feeds more than one half of the world’s population and is the model system for monocotyledonous plants. Salinity has been a key abiotic constraint devastating crop production worldwide. However, rice is very sensitive to salinity and is the most salt sensitive cereal crop with a threshold of 3 dSm-1 for most cultivated varieties. Even at EC as low as 3.5 dSm-1, rice loses about 10% of its yield and 50% yield loss was recorded for rice at EC 7.2 dSm-1. Attempts in understanding salt tolerance mechanisms has revealed several key enzymes and altered biochemical pathways inferring resistance to crop plants against salt stress. Being a glycophyte by nature, its growth is severely imparted in presence of excess salt. Rice is susceptible to salinity specifically at the early vegetative and later reproductive stages and the response of the crop to excessive salt toxicity at biochemical and molecular level as well as physiological level is well studied and documented. An understanding of the specific response of rice to ion accumulation at the toxic level can aid in identifying the key factors responsible for retarded growth and limited production of rice with the future scope of mitigating the same. The present review summarizes the differential responses of rice, in particular, to salt toxicity enumerating the detailed morphological, physiological, biochemical and molecular changes occurring in the plant. An attempt to explain salinity tolerance and its future scope and implications in screening for salt tolerance has also been elucidated in the present study.
Pages: 1441-1447 | 400 Views 75 Downloads
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How to cite this article:
BS Thorat, TA Bagkar, SM Raut. Responses of rice under salinity stress: A review. Int J Chem Stud 2018;6(4):1441-1447.
