文献类型： 外文期刊

作者： Xu, C. C. ¹ ; Zhang, Q. R. ³ ; Hu, L. ⁴ ; Wang, R. M. ¹ ; Shi, Q. ² ; Chen, J. ¹ ; Song, Y. Y. ¹ ; Chen, D. M. ¹ ; Zeng, R. ¹ ;

作者机构： 1.Fujian Agr & Forestry Univ, Coll Agr, Minist Educ Genet Breeding & Multiple Utilizat Cr, Key Lab, Fuzhou 350002, Peoples R China

2.Fujian Agr & Forestry Univ, Coll Life Sci, Fuzhou 350002, Peoples R China

3.Fujian Acad Agr Sci, Crop Res Inst, Fuzhou 350013, Peoples R China

4.Nanning Normal Univ, Minist Educ, Key Lab Beibu Gulf Environm Change & Resources Ut, Nanning 530001, Peoples R China

关键词： Na2SiO3; priming; salinity stress; OsNHX1; OsVPI

期刊名称：APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH （ 影响因子：0.711； 五年影响因子：0.796 ）

ISSN： 1589-1623

年卷期： 2020 年 18 卷 4 期

页码：

收录情况： SCI

摘要： Rice is one of the most important cereal crops and is susceptible to salinity stress. To enhance biotic and abiotic stress tolerance in crops, the application of silicon (Si) during seedling culture and seed priming are two effective approaches. However, whether seed priming with silicon can enhance salinity stress tolerance in rice seedlings, and what the optimal concentration of Si treatment is largely unclear. In this study, rice seeds were pretreated with sodium silicate, and the hydroponically grown rice seedlings were exposed to sodium chloride. Our results show that seed soaking with Si can significantly improve the growth of rice seedlings under salinity-stress, as evidenced by enhanced fresh weight, dry weight, leaf relative water content, photosynthetic pigment level, soluble protein content, as well as the activities of POD and SOD enzymes. Moreover, Si-pretreated seeds showed accelerated seed germination, increased seedling height and reduced root length. Furthermore, qRT-PCR analysis showed that seed soaking with Si induced the transcription of genes encoding Na+/H+ exchangers and H+-pyrophosphatase. Our results imply that seed priming with Si enhances seedling tolerance to salinity stress without negative effect on growth and it can be used as an effective strategy.