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Jasmonic acid negatively regulation of root growth in Japonica rice (Oryza sativa L.) under cadmium treatment

文献类型： 外文期刊

作者： Wu, Bohan 1 ; Zeng, Zifan 1 ; Wu, Xiangyang 1 ; Li, Yingying 2 ; Wang, Fangquan 2 ; Yang, Jie 2 ; Li, Xia 1 ;

作者机构： 1.Jiangsu Univ, Sch Environm & Safety Engn, Zhenjiang 212013, Jiangsu, Peoples R China

2.Jiangsu Acad Agr Sci, Jiangsu Rice Res & Dev Ctr, Nanjing Branch, Inst Food Crops,China Natl Ctr Rice Improvement, Nanjing 210014, Peoples R China

3.Collaborat Innovat Ctr Modern Prod Technol Grain, Yangzhou 225009, Jiangsu, Peoples R China

4.Nanjing Agr Univ, Coll Life Sci, Nanjing 210095, Peoples R China

关键词： Rice (Oryza sativa L; ); Seed germination; Cadmium tolerance; Jasmonic acid

期刊名称：PLANT GROWTH REGULATION （ 影响因子：3.242； 五年影响因子：3.607 ）

ISSN： 0167-6903

年卷期： 2022 年 98 卷 3 期

页码：

收录情况： SCI

摘要： To explore the role of jasmonic acid (JA) in seed germination of japonica rice under Cadmium (Cd) stress, the growth indices of japonica rice varieties under the bud stage were measured for identifying the variety difference in Cd tolerance. Then the tolerant variety JJ818 and the sensitive one NJ9108 were treated under 150 mu mol L-1 Cd concentration, 0.5 mu mol L-1 methyl jasmonate (MeJA), and 10 mu mol L-1 Ibuprofen (IBU) alone or in combination to study the molecular mechanism. In addition to the germination phenotype (germination rate, root length and bud length), soluble protein content, soluble sugar content, and sugar components, alpha-amylase activity, and its related gene expression were also measured. The results showed that Cd treatment restricted the root length of rice seed (P < 0.05) but had little effect on germination rate and shoot length. The combined application of MeJA with Cd treatment further reduced the seed germination rate and shoot length, while its inhibitor (Ibuprofen) treatment showed an opposite trend. Cd treatment also decreased the expression of the alpha Amy and RL1, and the accompanying increases of the gene expression of JIOsPR10, OsLOX1, and OsLOX4 related to synthesizing JA. The results indicated that JA negatively regulates the of root growth of japonica rice seeds under cadmium treatment via the genes related to the synthesis at the bud stage. Compared with the NJ9108, JJ818 was more tolerant to Cd stress and was related to its insensitivity to JA.

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