数字农科院2.0

Pyridoxal 5 '-Phosphate Enhances The Growth And Morpho-Physiological Characteristics Of Rice Cultivars By Mitigating The Ethylene Accumulation Under Salinity Stress

文献类型： 外文期刊

作者： Hussain, S; Huang, J; Zhu, CQ; Zhu, LF; Cao, XC; Hussain, S; Ashraf, M; Khaskheli, MA; Kong, YL; Jin, QY; Li, XP; Zhang, JH

作者机构：

关键词： Acs Activity; Ethylene; Physiology; Pyridoxal 5 '-Phosphate; Rice; Salinity; Yield

期刊名称： PLANT PHYSIOLOGY AND BIOCHEMISTRY

ISSN： 0981-9428

年卷期： 2020 年 154 卷

页码：

收录情况： JCR（2021版）

摘要： Salinity-induced ethylene accumulation caused by high production of 1-aminocyclopropane-1-carboxylic acid (ACC) hinders rice plant growth and development. Nevertheless, ACC deaminase may alleviate salt stress and high ethylene production in rice cultivars under salinity stress. Pyridoxal 5'-phosphate (PLP), an ACC deaminase co-factor, could be a useful ACC inhibitor in plants;; however, it has not been studied before. In the present study, the effects of PLP on the growth and morphophysiological characteristics of rice cultivars (Jinyuan 85 (JY85) and Nipponbare (NPBA) were investigated under salinity stress (control (CK), low salinity (LS), and high salinity (HS) in hydroponic conditions. The experiment was laid out in a completely randomized design (CRD) under factorial arrangement of treatments. The results showed that, compared with no PLP, exogenous application of PLP significantly inhibited ACC and ethylene production in the roots, leaves and panicles of both cultivars under salinity, and PLP was more effective at improving the physiological characteristics of both cultivars under salinity stress. Further, root morphophysiological traits and pollen viability were triggered in the PLP treatment compared to the no-PLP treatment under various salinity levels. ACC production inhibited by PLP was useful for improving the 1000-grain weight, grain yield per plant, and total plant biomass under the CK, LS and HS treatments in both rice cultivars. These results revealed that PLP, as an ACC deaminase cofactor, is a key tool for mitigating ethylene-induced effects under salinity stress and for enhancing the agronomic and morphophysiological traits of rice under saline conditions.

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