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著者 Huang X., Peng X., Sun M.X.
タイトル OsGCD1 is essential for rice fertility and required for embryo dorsal-ventral pattern formation and endosperm development.
Abstract:
Rice fertility is critical for rice reproduction and is thus a focus of interest. Most studies have addressed male sterility and its relation to rice production. The mechanisms of regulation of embryogenesis and endosperm development are essential for rice reproduction, but remain largely unknown. Here, we report a functional analysis of the rice gene OsGCD1, which encodes a highly conserved homolog of Arabidopsis GCD1 (GAMETE CELLS DEFECTIVE1). OsGCD1 mutants were generated using the CRISPR/Cas9 system and subjected to functional analysis. The homozygote mutants cannot be obtained, whereas heterozygotes showed altered phenotypes. In the majority of aborted seeds, the endosperm nucleus divided a limited number of times. The free nuclei were distributed only at the micropylar end of embryo sacs, and their oriented positioning was blocked. In addition, aleurone differentiation was interrupted. The embryo developed slowly, and pattern formation, particularly the dorsal-ventral pattern and symmetry establishment, of embryos was disturbed. Thus, the embryos showed various morphological and structural dysplasias. Our findings reveal that OsGCD1 is essential for rice fertility and is required for dorsal-ventral pattern formation and endosperm free nucleus positioning, suggesting a critical role in sexual reproduction of both monocotyledon and dicotyledon plants.
掲載誌 New Phytol.
Country China
刊数 215(3)
ページ 1039-1058
発刊年 2017
PubMed ID 28585692
PubMed Central ID -
DOI 10.1111/nph.14625
URL -
関連情報
遺伝子 AMY1A DSG1 GCD1 GE1 HAZ1 OSH1 PNH1 SCR
INSD -
系統 野生イネ
コアコレクション 		-
突然変異系統(遺伝研 Collection) -
種子不稔系統 -
致死変異体系統 -
組織別発生段階
- 突然変異系統(遺伝子) 		-
栽培イネ品種(遺伝研 Collection) -
組織別発生段階 -
/rice/oryzabase