An agravitropic mutant of Arabidopsis, endodermal-amyloplast less 1, that lacks amyloplasts in hypocotyl endodermal cell layer

被引:51
作者
Fujihira, K
Kurata, T
Watahiki, MK
Karahara, I
Yamamoto, KT [1 ]
机构
[1] Hokkaido Univ, Grad Sch Environm Earth Sci, Div Biol Sci, Sapporo, Hokkaido 0600810, Japan
[2] Toyama Univ, Fac Sci, Dept Biol, Toyama 9308555, Japan
关键词
amyloplast; Arabidopsis thaliana; endodermis; gravitropic mutant;
D O I
10.1093/pcp/pcd046
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
We have isolated a new recessive mutant of Arabidopsis thaliana for gravitropism, endodermal-amyloplast less1 (eal1), eal1 shows reduced gravitropism in hypocotyl, and completely lacks gravitropism in inflorescence stems; root gravitropism is not affected. Starch staining with I-KI solution reveals almost no amyloplasts in call hypocotyls when grown on a sucrose-free medium, though the root columella cells contain as many amyloplasts as wild type, On a medium containing 1% sucrose, call hypocotyls contain as many starch granules as those of wild type, suggesting that starch synthesis is not affected in eal1. The endodermal cell layer which is thought to function as statocytes in hypocotyls is present in call. These results suggest that differentiation or development of gravity-responsive amyloplasts are affected in eal1 hypocotyls.
引用
收藏
页码:1193 / 1199
页数:7
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