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ID 14665
file
creator
Fujikawa, Y.
Sendo, S.
Oka, T.
Yamana, H.
Ofosu-Bude, K.G.
El-Shemy, H.
Fujita, K.
subject
metabolism
sugar
NDC
Biology
abstract
Relationships between leaf expansion and MeOH-soluble (cytosol) and cell-wall fractions, and their sugar composition prior to silking in flint corn lines were studied. A greater husk leaf area of one genotype, X-15 is mainly due to prolonged and higher rate of expansion. Prior to rapid expansion of husk leaf area, neutral sugars in the cytosol fraction accounted for most of the non-starch carbohydrates (56-62%), while hemicellulose and cellulose fractions accounted for less than 20%.0 In mature leaf parts, however, sugars in the cytosol fraction decreased but those in hemicellulose and cellulose fractions increased by 30 0x1.e499cp-891nd 42%, respectively. The predominant sugar in the cytosol fraction was glucose (Glc), while in the hemicellulose fraction xylose (Xyl) and arabinose (Ara) dominated. During rapid expansion of husk leaves, 13C was incorporated at a higher rate into hemicellulose than cellulose, and this process was more active in X-15 than in other genotypes. During an identical period, 13C atom 0.000000e+00xcess in Xyl increased markedly in the hemicellulose fraction, however it remained low in the cytosol one. The current results suggest that synthesis of Xyl and xylan plays an important role in renewal of hemicellulose, which may be required for expansion.
journal title
Journal of Agricultural Science
volume
Volume 139
issue
Issue 1
start page
37
end page
45
date of issued
2002-08
publisher
Cambridge University Press
issn
0021-8596
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 2002 Cambridge University Press
relation is version of URL
http://dx.doi.org/10.1017/S0021859602002319
department
Graduate School of Biosphere Science



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