广西植物2023，Vol.43Issue(12)：2328-2337,10.DOI:10.11931/guihaia.gxzw202206026
幼苗期不同水稻材料应答盐胁迫的生理差异分析
Physiological differences of different rice materials in response to salt stress at seedling stage
摘要
Abstract
In order to investigate physiological characteristics of salt-tolerance rice HD96-1 at seedling stage,indica rice HD96-1(strong salt-tolerant)and 93-11(weak salt-tolerant)were used as experimental materials in this study.Three NaCl concentrations(0,60,120 mmol·L-1)was set to treat 3-leaf rice seedlings for 7 d.The growth,physiological and biochemical indexes of two rice cultivars were measured and analyzed.The results were as follows:(1)The plant height and the pseudostem width of two cultivars decreased,and the root-shoot ratio increased under salt stress;compared with 93-11,the decrease of plant height and pseudostem width of HD96-1 was lower,and the increase of root-shoot ratio was higher under salt stress;in addition,the dry weight of aboveground and root of HD96-1 increased under salt stress,while that of 93-11 decreased.(2)The malonaldehyde(MDA),superoxide anion(O2-)and hydrogen peroxide(H2 O2)contents in rice seedlings increased after salt stress,of which the increase of HD96-1 was lower than that of 93-11.(3)The activities of superoxide dismutase(SOD),peroxidase(POD),catalase(CAT)and ascorbate peroxidase(APX),the contents of ascorbic acid(AsA),glutathione(GSH),proline,soluble sugar and soluble protein in rice seedlings were increased under salt stress,of which the increase of HD96-1 was higher than that of 93-11.In conclusion,the physiological mechanisms of two rice seedlings responding to salt stress are similar,but the difference is that HD96-1 with strong salt-tolerance is stronger antioxidant and osmotic regulation ability than 93-11 in response to salt stress,so that growth and development of HD96-1 are less inhibited than 93-11.关键词
水稻/幼苗/盐胁迫/生理特性/生长Key words
Oryza sativa/seedlings/salt stress/physiological characteristics/growth分类
农业科技引用本文复制引用
陈观秀,周鸿凯,王盼盼,许江环,郭海峰,刘梦霜,杨善..幼苗期不同水稻材料应答盐胁迫的生理差异分析[J].广西植物,2023,43(12):2328-2337,10.基金项目
广东省重点领域研发计划资助(2020B020219004) （2020B020219004）
广东省普通高校省级重大科研项目(2017KZDXM044) （2017KZDXM044）
湛江市科技专项资金(2020A06013) （2020A06013）
广东海洋大学博士科研启动费(060302052011). （060302052011）
