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ABA and polyamines act independently in primary leaves of cold‐stressed tomato ( Lycopersicon esculentum ) by Tae Eun Kim; Seong‐Ki Kim; Tae Jin Han; June Seung Lee; Soo Chul Chang is a Agricultural and Biological Sciences article available to read on EtoBox.

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The effects of ABA and putrescine, a polyamine, on cold‐induced membrane leakage were investigated using primary leaves of wild‐type and an ABA‐deficient mutant, __flacca__, of tomato (__Lycopersicon esculentum__ Mill.). The amount of chilling‐induced electrolyte leakage from __flacca__ leaves was much higher than that from the wild‐type leaves. When applied exogenously ABA reduced cold‐induced electrolyte leakage from leaves of both wild‐type and the __flacca__ mutant. However, the cold‐induced electrolyte leakage from __flacca__ leaves was not as pronounced as in the wild‐type indicating that ABA is an important mediator in response to cold stress in the leaves. Putrescine reduced cold‐induced electrolyte leakage from both wild‐type and __flacca__ leaves. Synthesis of putrescine in the leaves was increased by cold treatment. DFMO, a biosynthetic inhibitor of the polyamine, increased electrolyte leakage from cold‐treated leaves, and exogenously applied putrescine decreased the enhanced leakage to the control level. Therefore, this polyamine is thought also to be involved in the response to cold stress of tomato leaves. Both ABA and putrescine were protective against cold stress, b

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Author

Tae Eun Kim; Seong‐Ki Kim; Tae Jin Han; June Seung Lee; Soo Chul Chang

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley (ISSN 0031-9317)

Published

2002

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)