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| Title: A novel factor FLOURY ENDOSPERM2 is involved in regulation of rice grain size and starch quality .
| | Author: She KC Kusano H Koizumi K Yamakawa H Hakata M Imamura T Fukuda M Naito N Tsurumaki Y Yaeshima M Tsuge T Matsumoto K Kudoh M Itoh E Kikuchi S Kishimoto N Yazaki J Ando T Yano M Aoyama T Sasaki T Satoh H Shimada H | | Journal: Plant Cell Citation: V : 22 P : 3280-94 Year: 2010 Type: MEDLINE | | Literature: oryza Field: abstract Doc ID: pub20889913 Accession (PMID): 20889913 | | Abstract: Rice ( Oryza sativa ) endosperm accumulates a massive amount of storage starch and storage proteins during seed development .
However , little is known about the regulatory system involved in the production of storage substances .
The rice flo2 mutation resulted in reduced grain size and starch quality .
Map-based cloning identified FLOURY ENDOSPERM2 ( FLO2 ) , a member of a novel gene family conserved in plants , as the gene responsible for the rice flo2 mutation .
FLO2 harbors a tetratricopeptide repeat motif , considered to mediate a protein-protein interactions .
FLO2 was abundantly expressed in developing seeds coincident with production of storage starch and protein , as well as in leaves , while abundant expression of its homologs was observed only in leaves .
The flo2 mutation decreased expression of genes involved in production of storage starch and storage proteins in the endosperm .
Differences between cultivars in their responsiveness of FLO2 expression during high-temperature stress indicated that FLO2 may be involved in heat tolerance during seed development .
Overexpression of FLO2 enlarged the size of grains significantly .
These results suggest that FLO2 plays a pivotal regulatory role in rice grain size and starch quality by affecting storage substance accumulation in the endosperm .
| Matching Sentences:
[ Sen. 4, subscore: 2.00 ]: Map-based cloning identified FLOURY ENDOSPERM2 ( FLO2 ) , a member of a novel gene family conserved in plants , as the gene responsible for the rice flo2 mutation .
[ Sen. 8, subscore: 2.00 ]: Differences between cultivars in their responsiveness of FLO2 expression during high-temperature stress indicated that FLO2 may be involved in heat tolerance during seed development .
[ Sen. 3, subscore: 1.00 ]: The rice flo2 mutation resulted in reduced grain size and starch quality .
[ Sen. 5, subscore: 1.00 ]: FLO2 harbors a tetratricopeptide repeat motif , considered to mediate a protein-protein interactions .
[ Sen. 6, subscore: 1.00 ]: FLO2 was abundantly expressed in developing seeds coincident with production of storage starch and protein , as well as in leaves , while abundant expression of its homologs was observed only in leaves .
[ Sen. 7, subscore: 1.00 ]: The flo2 mutation decreased expression of genes involved in production of storage starch and storage proteins in the endosperm .
[ Sen. 9, subscore: 1.00 ]: Overexpression of FLO2 enlarged the size of grains significantly .
[ Sen. 10, subscore: 1.00 ]: These results suggest that FLO2 plays a pivotal regulatory role in rice grain size and starch quality by affecting storage substance accumulation in the endosperm .
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