水分胁迫对荔枝叶片呼吸代谢有关酶活性的影响

doi:10.11707/j.1001-7488.20030207

林业科学 ›› 2003, Vol. 39 ›› Issue (2): 39-43.doi: 10.11707/j.1001-7488.20030207

水分胁迫对荔枝叶片呼吸代谢有关酶活性的影响

陈立松刘星辉

福建农林大学园艺学院,福州350002

收稿日期:2000-11-15 修回日期:1900-01-01 出版日期:2003-03-25 发布日期:2003-03-25

EFFECTS OF WATER STRESS ON SOME ENZYME ACTIVITIES RELATED TO RESPIRATORY METABOLISM IN LITCHI CHINENSIS LEAVES

Chen Lisong,Liu Xinghui

College of Horticulture,Fujian Agriculture and Forestry University Fuzhou350002

Received:2000-11-15 Revised:1900-01-01 Online:2003-03-25 Published:2003-03-25

摘要/Abstract

摘要：

以抗旱性不同的2a生盆栽实生荔枝(Litchi chinensis Sonn .)幼苗为试验材料,研究了水分胁迫对荔枝叶片呼吸代谢有关的几种酶活性的影响。结果表明:(1)水分胁迫下,叶片相对含水量(RWC)减少,抗旱性较强的“东刘1号”下降的幅度小于抗旱性弱的“陈紫”。(2)水分胁迫下,荔枝叶片线粒体膜结合酶Mg²⁺-AT-Pase和Ca²⁺-ATPase活性增加,乙醇酸氧化酶活性下降;抗旱性较强的品种Mg²⁺-ATPase和Ca²⁺-ATPase活性增加的幅度以及乙醇酸氧化酶活性下降的幅度均大于抗旱性较弱的品种。(3)水分胁迫下,荔枝叶片葡萄糖6-磷酸脱氢酶(G-6-PDH)和细胞色素C还原酶(NADH-CCR)活性下降,NADH-CCR活性/G-6-PDH活性比值上升;抗旱性较强的品种G-6-PDH和NADH-CCR活性下降的幅度以及NADH-CCR活性/G-6-PDH活性比值均小于抗旱性较弱的品种。

关键词: 荔枝, 水分胁迫, 呼吸酶活性

Abstract:

The 2-year-old seedlings of two litchi(Litchi chinensis Sonn.)cultivars grown in pots with different drought-resistance were used in this study.“Chenzi” grown in riverside is considered to be drought-sensitive,while “Dongliu 1” grown on hills is considered to be drought-resistant.Effects of water stress on some enzyme activities related to respiratory metabolism in litchi leaves were studied.The results showed:(1)Under water stress,the relative water content(RWC) of litchi leaves decreased,and the extent of decrease was less in drought-resistant “Dongliu 1” than in drought-sensitive “Chenzi”. (2)Under water stress,the activities of Mg²⁺-ATPase and Ca²⁺-ATPase in mitochondria of litchi leaves increased,and the activity of glycolate oxidase decreased.The extent of Mg²⁺-ATPase and Ca²⁺-ATPase activities increase and the extent of glycolate oxidase activity decrease in drought-resistant cultivar were higher than in drought-sensitive one.(3)The activities of Glucose-6-phosphate dehydrogenase(G-6-PDH) and NADH-cytochrome c reductase(NADH-CCR) in the litchi leaves decreased and the ratios of NADH-CCR activity/G-6-PDH activity increased under water stress.The extent of G-6-PDH and NADH-CCR activity decrease and the extent of NADH-CCR activity/G-6-PDH activity increase in drought-sensitive cultivar were greater than in drought-resistant one.

Key words: Litchi chinensis, Water stress, Activities of respiratory enzymes

陈立松刘星辉. 水分胁迫对荔枝叶片呼吸代谢有关酶活性的影响[J]. 林业科学, 2003, 39(2): 39-43.

Chen Lisong;Liu Xinghui. EFFECTS OF WATER STRESS ON SOME ENZYME ACTIVITIES RELATED TO RESPIRATORY METABOLISM IN LITCHI CHINENSIS LEAVES[J]. Scientia Silvae Sinicae, 2003, 39(2): 39-43.

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水分胁迫对荔枝叶片呼吸代谢有关酶活性的影响

EFFECTS OF WATER STRESS ON SOME ENZYME ACTIVITIES RELATED TO RESPIRATORY METABOLISM IN LITCHI CHINENSIS LEAVES

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