A MUTANT OF ARABIDOPSIS WHICH IS DEFECTIVE IN SEED DEVELOPMENT AND STORAGE PROTEIN ACCUMULATION IS A NEW ABI3 ALLELE

被引:178
作者
NAMBARA, E
NAITO, S
MCCOURT, P
机构
[1] UNIV TORONTO,DEPT BOT,25 WILLCOCKS ST,TORONTO M5S 3B2,ONTARIO,CANADA
[2] NAGOYA UNIV,SCH AGR,BIOCHEM RES INST REGULAT,CHIKUSA KU,NAGOYA 46401,JAPAN
[3] UNIV TOKYO,MOLEC GENET RES LAB,TOKYO 113,JAPAN
关键词
D O I
10.1111/j.1365-313X.1992.00435.x
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
In order to investigate the role of the plant hormones gibberellin (GA) and abscisic acid (ABA) in seed development and germination the GA biosynthetic inhibitor, Uniconazol, was used to isolate mutants with abnormal germination profiles. In one of these mutants, the ability to germinate on Uniconazol is due to a mutation in the ABI3 gene. However, unlike the previously reported abi3 mutant, this line displays an array of seed-specific developmental defects. The accumulation of seed reserve proteins is dramatically reduced due to reduced levels of the storage protein mRNA. The embryos remain green throughout development and are desiccation intolerant. However, immature seeds are completely non-dormant and grow normally. These results suggest the ABI3 gene is essential for the synthesis of seed storage proteins and for the protection of the embryo during desiccation.
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页码:435 / 441
页数:7
相关论文
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