Cytokinin oxidase/dehydrogenase in Pisum sativum plants during vegetative development. Influence of UV-B irradiation and high temperature on enzymatic activity

被引：0
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作者：
Irina Vaseva-Gemisheva
David Lee
Vera Alexieva
Emanuil Karanov
机构：
[1] Molecular Research Group,Acad. M. Popov Institute of Plant Physiology
[2] NIAB,undefined
[3] Bulgarian Academy of Sciences,undefined
来源：
Plant Growth Regulation | 2004年 / 42卷
关键词：
Cytokinin oxidase/dehydrogenase; Development; High temperature; Senescence; Stress; UV-B irradiation;
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摘要：
Cytokinin oxidase/dehydrogenase (EC 1.5.99.12) specific activity was determined in leaves and roots of two P. sativum cultivars (cv. Scinado and cv. Manuela) during vegetative development and the effect of UV-B irradiation or elevated temperature was assessed. The measurement of CKX activity during development showed localisation of this enzyme to roots. The reduction in CKX activity in leaves after UV-B irradiation and the increased levels of the enzyme in high temperature-treated plants suggests that the enzymes from the CKX gene family have a different expression during stress responses provoked by different factors and probably are tissue specific. Differences regarding cytokinin oxidase/dehydrogenase activity stress response were observed between the two pea cultivars.
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页码：1 / 5
页数：4
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