Pretreatment with 5-aminolevulinic acid mitigates heat stress of cucumber leaves

被引：70

作者：

Zhang, J. ^{[1
]}

Li, D. -M. ^{[1
]}

Gao, Y. ^{[1
]}

Yu, B. ^{[1
]}

Xia, C. -X. ^{[2
]}

Bai, J. -G. ^{[1
]}

机构：

[1] Shandong Agr Univ, State Key Lab Crop Biol, Coll Life Sci, Tai An 271018, Shandong, Peoples R China

[2] Shandong Agr Univ, Coll Food Sci & Engn, Tai An 271018, Shandong, Peoples R China

来源：

BIOLOGIA PLANTARUM | 2012年 / 56卷 / 04期

关键词：

5-aminolevulinic acid; antioxidant enzyme; Cucumis sativus; heat; proline; soluble sugar; SUPEROXIDE-DISMUTASE; ANTIOXIDANT ENZYMES; LIPID-PEROXIDATION; TOLERANCE; ULTRASTRUCTURE; INCREASE; L; CHLOROPLASTS; GLUTATHIONE; CULTIVARS;

D O I：

10.1007/s10535-012-0136-9

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Cucumber seedlings were pretreated with 3 mu M 5-aminolevulinic acid (ALA) followed by cultivation at normal (25/18 A degrees C) or high (42/38 A degrees C) day/night temperature to investigate the protective effects of ALA on heat stress in plants. Heat elevated the contents of malondiadehyde (MDA), superoxide radical (O-2 (.-)) and hydrogen peroxide (H2O2) in leaves of all plants but less in ALA-pretreated plants. Heat treatment resulted in higher antioxidant enzyme activities and proline and soluble sugar contents and weaker growth inhibition in ALA-pretreated plants than in those treated with heat alone. These results indicate that ALA pretreatment increased the tolerance of seedlings to heat stress.

引用

页码：780 / 784

页数：5

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