盐胁迫对不同基因型黄秋葵苗期生长及生理生态特征的影响

发布时间：2018-04-22 13:26

本文选题：NaCl + 黄秋葵　；参考：《华北农学报》2016年06期

【摘要】：为揭示盐害下不同黄秋葵品种苗期生长的差异,以2个黄秋葵品种皇星五角(HXWJ,耐盐型)和绿新五角(LXWJ,盐敏感型)为试验材料,采用盆栽法研究不同浓度Na Cl(0,80,160 mmol/L)、不同胁迫时间(25,50 d)对黄秋葵植株苗期生长及生理生态指标的影响。结果表明:随着Na Cl浓度的提高、胁迫天数的增加,黄秋葵幼苗的株高、根长、植株鲜干质量、细胞膜稳定指数(CMSI)、K+含量,K+/Na+比呈下降的趋势;而叶片丙二醛(MDA)含量,Na+含量逐步升高;盐胁迫下黄秋葵幼苗鲜质量下降的幅度大于干质量,茎叶下降的幅度大于根系;胁迫至25 d,黄秋葵叶片和根中SOD、POD活性随Na Cl浓度增加逐步升高,胁迫至50 d,2个酶活性随Na Cl浓度增加先升高后降低;整个胁迫过程中,幼苗的株高、根长、植株鲜干质量、CMSI、K+含量,K+/Na+比含量的降幅及MDA含量的增幅均为HXWJLXWJ,表明苗期较高的干物质积累、细胞膜稳定性及K+含量是耐盐性黄秋葵品种的基本特征。
[Abstract]:In order to reveal the difference of seedling growth of different anemone varieties under salt injury, two varieties HXWJ (salt tolerant) and LXWJ (salt sensitive type) were used as experimental materials. Pot culture was used to study the effects of different concentrations of NaClO (80160 mmol / L) and different stress time (2550 days) on the growth and physiological and ecological indexes of sunflower plants at seedling stage. The results showed that with the increase of NaCl concentration and stress days, the plant height, root length, fresh dry weight, cell membrane stability index (CMSI) K content and K / Na ratio of anemone seedlings decreased. However, the content of malondialdehyde (MDAA) in leaves increased gradually, and the decrease of fresh weight was greater than that of dry weight, and that of stem and leaf was larger than that of root under salt stress. After 25 days of stress, the activity of SOD POD in leaves and roots of Okra increased gradually with the increase of NaCl concentration, and at 50 days of stress, the activities of two enzymes increased first and then decreased with the increase of NaCl concentration. During the whole stress process, the plant height and root length of seedlings increased. The decrease of K / Na ratio and the increase of MDA content were both HXWJLXWJ, which indicated that high dry matter accumulation, cell membrane stability and K content were the basic characteristics of salt-tolerant Okra varieties.
【作者单位】：江苏沿海地区农业科学研究所农业部沿海盐碱地农业科学观测实验站;江苏省盐土生物资源研究重点实验室;江苏省农业科学院经济作物研究所;
【基金】：江苏省农业科技自主创新基金项目[CX(12)5071] 江苏省盐土生物资源研究重点实验室开放课题(JKLBS2013008)
【分类号】：S649

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