期刊
PLANT GROWTH REGULATION
卷 42, 期 1, 页码 1-5出版社
SPRINGER
DOI: 10.1023/B:GROW.0000014888.45592.4d
关键词
cytokinin oxidase/dehydrogenase; development; high temperature; senescence; stress; UV-B irradiation
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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