|
KMID : 0903619850260040350
|
|
Journal of the Korean Society for Horticultural Science
1985 Volume.26 No. 4 p.350 ~ p.360
|
|
|
Accumulation and Mobilization of Storage Proteins in Ginkgo Shoot Bark
|
|
Titus, J S
|
|
|
Abstract
|
|
|
|
Four major protein bands (17.5, 20, 40, and 45K), each consisting of many separate proteins, were identified from ginkgo shoot bark using SDS gel electrophoresis. The four bands contributed to the bulk of the total extractable proteins throughout the period of sample collection. However, the relative proportions of these 4 protein bands changed as senescence progressed. Proteins in the 40 and 45K bands increased dramatically as senescence progressed, indicating that some proteins in these high MW bands may serve a storage role in the bark on ginkgo trees. No significant differences were observed in protein bands of the bark of male and female ginkgo trees. Differential N treatments during the growing season greatly affected protein accumulation. At the end of senescence, the bark of trees receiving high N (224 ppm) contained 5 times the amount of extractable protein than did the bark of trees receiving low N (54 ppm). During spring regrowth the proteins in the 40 and 45K bands rapidly disappeared and probably served as a N source for the initial shoot growth. This pattern was similar in trees receiving either the low N or the high N treatment.
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|
|