Biotechnology Bulletin ›› 2020, Vol. 36 ›› Issue (11): 103-111.doi: 10.13560/j.cnki.biotech.bull.1985.2020-0263

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Advances on Alkaline Tolerance of Rice

LENG Chun-xu(), ZHENG Fu-yu, ZHAO Bei-ping, LIU Hai-ying, WANG Yu-jie()   

  1. Biotechnology Research Institute of Heilongjiang Academy of Agricultural Sciences,Key Laboratory of Crop and Livestock Molecular Breeding of Heilongjiang, Harbin 150028
  • Received:2020-03-12 Online:2020-11-26 Published:2020-11-20
  • Contact: WANG Yu-jie E-mail:lengchunxu@163.com;Lkwangyujie@126.com

Abstract:

In China,with the degree of land salinization aggravating,the crop production is impeded. Rice,as a moderately salt-sensitive crop,as its roots absorb salt and secrete organic acids,may dilute the salinity-alkalinity of the soil surface in its growing water environment,thus making it the first choice for improving saline-alkali land. Salt and alkali stress cause both osmotic stress and ion toxicity to rice plants. Furthermore,alkali stress results in the rice suffering from double damages of high pH value and high salinity,the damage is more severe and the regulation mechanism is more complex than salt stress. At present,most of the researches had focused on salt stress,but few studies were on the response and regulation mechanism of alkali stress. This paper systematically reviewed the effects of alkali stress on the growth,development,physiology,and biochemistry of rice,as well as the alkali-resistance mechanism and related genes,and finally proposed a strategy of enhancing the alkali tolerance of rice. It is aimed to breed new alkali-resistant rice varieties through the molecular biological technique for improving saline-alkali soil,increasing rice plating area and rice yield,and thus protecting national food security.

Key words: rice, alkali resistance, alkali stress