The gravitropism defective 2 mutants of Arabidopsis are deficient in a protein implicated in endocytosis in Caenorhabditis elegans

被引：55

作者：

Silady, RA

Kato, T

Lukowitz, W

Sieber, P

Tasaka, M

Somerville, CR

机构：

[1] Carnegie Inst Sci, Dept Plant Biol, Stanford, CA 94305 USA

[2] Stanford Univ, Dept Biol Sci, Stanford, CA 94305 USA

[3] Nara Inst Sci & Technol, Grad Sch Biol Sci, Nara 6300101, Japan

来源：

PLANT PHYSIOLOGY | 2004年 / 136卷 / 02期

关键词：

D O I：

10.1104/pp.104.050583

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The gravitropism defective 2 (grv2) mutants of Arabidopsis show reduced shoot phototropism and gravitropism. Amyloplasts in the shoot endodermal cells of grv2 do not sediment to the same degree as in wild type. The GRV2 gene encodes a 277-kD polypeptide that is 42% similar to the Caenorhabditis elegans RME-8 protein, which is required for endocytosis. We hypothesize that a defect in endocytosis may affect both the initial gravity sensing via amyloplasts sedimentation and the subsequent more general tropic growth response.

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页码：3095 / 3103

页数：9

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