|
KMID : 0368419880310020155
|
|
Journal of Plant Biology
1988 Volume.31 No. 2 p.155 ~ p.164
|
|
|
Effects of Spermidine on the Senescence in Leaf Discs of Chinese Cabbage
|
|
|
|
|
Abstract
|
|
|
|
The rapid senescence of detached Chinese cabbage leaf discs in darkness is first manifested by a sharp rise in malondialdehyde content (indicated by distruption of membrane structure), then by a rise in peroxidase activity and a decrease in catalase activity, and ultimately by chlorophyll degradation. These changes in parameters besides the catalase activity during senescence were delayed by application of spermidine. Especially, 10^-4M spermidine almost completely arrested chlorophyll degradation after incubation over 5 days. Spermidine reduced the amount of ethylene produced by senescing leaf discs. Additionally, it also reduced 1AA-induced ethylene production. Calcium ion (1 mM, 10 mM) supplied together with the spermidine dimminished the spermidine action, indicating probable involvement of an initial ionic attachment mechanism. These results suggest that spermidine can be used as an anti-senescence agent for plants and that this agent may stabillize membrane structure through interaction with the negatively charged loci on the membrane and exert the influence during senescence.
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|