华北农学报 ›› 1995, Vol. 10 ›› Issue (2): 43-49. doi: 10.3321/j.issn:1000-7091.1995.02.009

所属专题: 玉米 抗旱节水 高影响力文章

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水分胁迫对玉米保护酶系活力及膜系统结构的影响

王茅雁, 邵世勤, 张建华, 耿庆汉   

  1. 内蒙古农牧学院, 呼和浩特 010018
  • 收稿日期:1994-12-25 出版日期:1995-06-28

Effect of Water Stress upon the Activities of Protective Enzyme System and the Structures of Membrane System in Maize

Wang Maoyan, Shao Shiqin, Zhang Jianhua, Geng Qinghan   

  1. Inner Mongolia Institute of Agriculture and Animal Husbandry, Huhhot
  • Received:1994-12-25 Published:1995-06-28

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。

关键词: 水分胁迫, 玉米, 保护酶系, 膜系统

Abstract: 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.

Key words: Water stress, Maize, Protective enzyme system, Membrane system

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王茅雁, 邵世勤, 张建华, 耿庆汉. 水分胁迫对玉米保护酶系活力及膜系统结构的影响[J]. 华北农学报, 1995, 10(2): 43-49. doi: 10.3321/j.issn:1000-7091.1995.02.009.

Wang Maoyan, Shao Shiqin, Zhang Jianhua, Geng Qinghan. Effect of Water Stress upon the Activities of Protective Enzyme System and the Structures of Membrane System in Maize[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1995, 10(2): 43-49. doi: 10.3321/j.issn:1000-7091.1995.02.009.

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