Abstract
Cucumber seedlings were pretreated with 3 μM 5-aminolevulinic acid (ALA) followed by cultivation at normal (25/18 °C) or high (42/38 °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 (O2 .−) 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.
Abbreviations
- ALA:
-
5-aminolevulinic acid
- APX:
-
ascorbate peroxidase
- CAT:
-
catalase
- DHAR:
-
dehydroascorbate reductase
- GPX:
-
guaiacol peroxidase
- GR:
-
glutathione reductase
- GSH-Px:
-
glutathione peroxidase
- MDA:
-
malondiadehyde
- MDHAR:
-
monodehydroascorbate reductase
- SOD:
-
superoxide dismutase
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Zhang, J., Li, D.M., Gao, Y. et al. Pretreatment with 5-aminolevulinic acid mitigates heat stress of cucumber leaves. Biol Plant 56, 780–784 (2012). https://doi.org/10.1007/s10535-012-0136-9
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DOI: https://doi.org/10.1007/s10535-012-0136-9