Cytokinin Activity in Water-stressed Shoots | Zendy

Chanan Itai | Zendy; Yoash Vaadia | Zendy

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Cytokinin Activity in Water-stressed Shoots

Author(s) -

Chanan Itai,

Yoash Vaadia

Publication year - 1971

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.47.1.87

Subject(s) - cytokinin , wilting , xylem , exudate , shoot , kinetin , water stress , botany , chemistry , biology , horticulture , tissue culture , biochemistry , auxin , in vitro , gene

Water stress applied to the plant shoot through enhanced evaporative demands reduced cytokinin activity in extracts of xylem exudate and leaves. This reduction resembled the changes in cytokinin activity caused by water stress applied to the root. Cytokinin activity in detached wilting leaves decreased rapidly. Recovery took place after several hours in a humid chamber. Experiments with (14)C-kinetin indicated that the mechanism of the inactivation and its reversal involve a chemical transformation of the cytokinin molecule.

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