TY - JOUR
T1 - Varietal differences in cell wall β-(1→3),(1→4)-glucan and nonstructural carbohydrate in rice stems during the grain filling stage
AU - Arai-Sanoh, Yumiko
AU - Ida, Masashi
AU - Zhao, Rui
AU - Nishitani, Kazuhiko
AU - Yoshinaga, Satoshi
AU - Takai, Toshiyuki
AU - Nakano, Hiroshi
AU - Iwasawa, Norio
AU - Kondo, Motohiko
N1 - Copyright:
Copyright 2013 Elsevier B.V., All rights reserved.
PY - 2013/9/27
Y1 - 2013/9/27
N2 - The contribution of cell wall components and nonstructural carbohydrate (NSC) to grain filling in rice (Oryza sativa L.) was clarified by investigating the differences in the dynamics of hemicellulose, sugar composition of hemicellulose, β-(1→3),(1→4)-glucan, and NSC among cultivars with different grain filling capacities. This investigation was performed using the stems of standard, high yield and low harvest index (HI) cultivars. Hemicellulose concentration in stems tended to decrease slightly during the grain filling stage. This decrease was attributed to a decrease in β-(1→3),(1→4)-glucan concentration, which was detected as a decrease in glucose composition of hemicellulose in the stems during the grain filling stage. The rate of decrease and decrease in the amount of β-(1→3),(1→4)-glucan in the stems differed among the cultivars. These were higher in high yield and high HI cultivars than in relatively low yield and low HI cultivars. Moreover, a positive correlation was observed between the rate of decrease in β-(1→3),(1→4)-glucan and NSC, indicating similarities in the dynamics of β-(1→3),(1→4)-glucan and NSC among the cultivars. When the top half of panicle was removed, β-(1→3),(1→4)-glucan and NSC concentrations in the culm and leaf sheath did not decrease during the grain filling stage. Therefore, the β-(1→3),(1→4)-glucan in stems might be one of the sources that supply substrate to panicle as well as NSC.
AB - The contribution of cell wall components and nonstructural carbohydrate (NSC) to grain filling in rice (Oryza sativa L.) was clarified by investigating the differences in the dynamics of hemicellulose, sugar composition of hemicellulose, β-(1→3),(1→4)-glucan, and NSC among cultivars with different grain filling capacities. This investigation was performed using the stems of standard, high yield and low harvest index (HI) cultivars. Hemicellulose concentration in stems tended to decrease slightly during the grain filling stage. This decrease was attributed to a decrease in β-(1→3),(1→4)-glucan concentration, which was detected as a decrease in glucose composition of hemicellulose in the stems during the grain filling stage. The rate of decrease and decrease in the amount of β-(1→3),(1→4)-glucan in the stems differed among the cultivars. These were higher in high yield and high HI cultivars than in relatively low yield and low HI cultivars. Moreover, a positive correlation was observed between the rate of decrease in β-(1→3),(1→4)-glucan and NSC, indicating similarities in the dynamics of β-(1→3),(1→4)-glucan and NSC among the cultivars. When the top half of panicle was removed, β-(1→3),(1→4)-glucan and NSC concentrations in the culm and leaf sheath did not decrease during the grain filling stage. Therefore, the β-(1→3),(1→4)-glucan in stems might be one of the sources that supply substrate to panicle as well as NSC.
KW - (1→4)-glucan
KW - Cell wall
KW - Hemicellulose
KW - Nonstructural carbohydrate
KW - Rice
KW - β-(1→3)
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U2 - 10.1626/pps.16.335
DO - 10.1626/pps.16.335
M3 - Article
AN - SCOPUS:84884738738
VL - 16
SP - 335
EP - 341
JO - Plant Production Science
JF - Plant Production Science
SN - 1343-943X
IS - 4
ER -