Seed priming using different agents can alleviate salt stress in kenaf (Hibiscus cannabinus L.) by activating antioxidant system and related genes expression

文献类型： 外文期刊

第一作者： Li, Renxue

作者： Li, Renxue;Luo, Dengjie;Rehman, Muzammal;Li, Xin;Wang, Caijin;Cao, Shan;Xu, Guofeng;Wang, Meng;Chen, Canni;Nie, Jingzhi;Chen, Peng;Li, Ru;Chen, Tao

作者机构：

关键词： Seed priming; Salt stress; Kenaf; Seed germination; Biochemical response; Gene expression

期刊名称：PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS （ 影响因子：3.3； 五年影响因子：3.9 ）

ISSN： 0971-5894

年卷期： 2024 年 30 卷 10 期

页码：

收录情况： SCI

摘要： High salinity is an abiotic stress that limits crop production. Kenaf (Hibiscus cannabinus L.) is an annual fiber crop of the genus Hibiscus in the family Malvaceae with a certain tolerance to salt stress. Seed priming has been shown to ameliorate the adverse effects of salt stress on plants. However, the salt resistance mechanism in kenaf seeds treated with priming agents is not fully understood. In this study, we used four priming agents (H2O, PEG, ABA, KNO3) in different concentrations to treat kenaf seeds, and subjected the induced kenaf seedlings to salt stress (150 mM NaCl) to measure their agronomic traits and physiological and biochemical indicators. Our results indicate that the optimal priming concentration for PEG was 10%, 0.5 mu M for ABA, and 0.5% for KNO3. Under these treatment concentrations, the germination rate of kenaf was significantly increased, and the fresh weight was also increased by 35.1%, 33.39%, 20.78% and 15.3%, respectively. Furthermore, the use of priming agents can alleviate the adverse effects of salt stress to a certain extent, significantly increase the agronomic indicators such as plant height, stem thickness, and leaf area of kenaf, enhance the ability of plants to perform photosynthesis, further improve the activity of antioxidant enzymes and increase the content of osmotic material, and reduce the accumulation of cell H2O2, O-2(-) and MDA. Meanwhile, seed priming can also enhance the expression of HcSOS1, HcNHX, HcHKT, HcCBL, HcCIPK, HcPD and HcNCED involved in the salt stress pathway. These results warrant that seed priming can reduce the adverse effects of salt stress on kenaf.

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