期刊文献+

水分胁迫对玉米保护酶系活力及膜系统结构的影响 预览 被引量:72

Effect of Water Stress upon the Activities of Protective Enzyme System and the Structures of Membrane System in Maize
在线阅读 免费下载
收藏 分享 导出
摘要 在PEG诱导的水分胁迫下,SOD活力在不同抗旱性的玉米品种或杂交组合中均呈现下降─回升─下降的变化趋势;CAT活力在抗旱性强的品种中先升(或基本不变)后降,而在抗旱性弱的品种中一直降低;POD活力在所有品种均呈明显降低。同时,叶片质膜透性增大,叶绿体和线粒体超微结构受损,抗旱性强的品种受损程度较轻。SOD和CAT活力与质膜、叶绿体和线粒体膜系统结构的损伤程度呈负相关,与品种抗旱性呈正相关,可作为玉米抗旱鉴定的生化指标;而POD活力与上述膜系统的损伤程度及品种抗旱性相关不大。 When exposed to water stress induced by PEG, the activity of SOD in the maize seedlings with different drought-resistance lowered at the beginning and then increased and then lowered again; the activity of CAT went up (or almost did not change) at the beginning and then lowered in the strong drought-resistance genotypes but lowered straight in the weak droughtresistance genotypes; the activity of POD lowered apparently in all genotypes. At the sametime, the permeability of plasma membrane increased; the super-microstructures of chloroplasts and mitochondria in the leaves were damaged, and the damaged degree was lighter in the strong drought-resistance genotypes than that in the weak drought-resistance genotypes. The activities of SOD and CAT were negatively related to the damaged degree of plasmalemrna and chloroplasts and mitochondria membrane systems, but positively related to the drought-resistant properties of the genotypes, thus may be used as the biochernical appraisal indexes of drought-resistance of matte. However, the correlation between POD activity and the damaged degree of the membrane systems and the correlation between POD activity and the drought-resistant properties of the genotypes were not apparent.
作者 王茅雁 邵世勤 Wang Maoyan; Shao Shiqin; Zhang Jianhua; Geng Qinghan(Inner Mongolia Institute of Agriculture and Animal Husbandry, Huhhot)
机构地区 内蒙古农牧学院
出处 《华北农学报》 CSCD 北大核心 1995年第2期 43-49,共7页 Acta Agriculturae Boreali-Sinica
关键词 水分胁迫 玉米 保护酶系 膜系统 抗旱性 Water stress Maize Protective enzyme system Membrane system
  • 相关文献

同被引文献1004

引证文献72

二级引证文献1059

投稿分析

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部 意见反馈