Effects of grafting on root polyamine metabolism of cucumber seedlings under copper stress

By the method of hydroponic culture, and taking Cucurbita ficifolia B. as rootstock, this paper studied the effects of grafting on the root polyamine metabolism of cucumber seedlings under copper stress. The results showed that under copper stress, the root activities of cucumber seedlings were inhi...

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Bibliographic Details
Published inYing yong sheng tai xue bao Vol. 21; no. 8; p. 2051
Main Authors Zhang, Zi-Kun, Liu, Shi-Qi, Liu, Su-Hui, Zhang, Yu, Chen, Kun, Huang, Zhi-Jun
Format Journal Article
LanguageChinese
Published China 01.08.2010
Subjects
Agriculture - methods
Copper - toxicity
Cucumis sativus - growth & development
Cucumis sativus - metabolism
Plant Roots - metabolism
Polyamines - metabolism
Seedlings - metabolism
Stress, Physiological
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Summary:By the method of hydroponic culture, and taking Cucurbita ficifolia B. as rootstock, this paper studied the effects of grafting on the root polyamine metabolism of cucumber seedlings under copper stress. The results showed that under copper stress, the root activities of cucumber seedlings were inhibited, and electrolyte leakage increased, with these changes being significantly lower for grafted than for ungrafted cucumber seedlings. In addition, the contents of free spermidine and spermine, and of conjugated and bound polyamines were significantly higher in grafted than in ungrafted seedling roots, while the free putrescine content and the ratio of free putrescine to polyamines were on the contrary. Comparing with those in ungrafted cucumber seedlings, the root arginine decarboxylase (ADC), ornithine decarboxylase (ODC), and S-adenosylmethionine decarboxylase (SAMDC) activities in grafted cucumber seedlings were higher, while the diamine oxidase and polyamine oxidase activities were significantly lower. All
ISSN:1001-9332