Organ fusion and defective shoot development in oni3 mutants of rice

被引：28

作者：

Akiba, Takafumi ^{[1
]}

Hibara, Ken-Ichiro ^{[2
]}

Kimura, Fumiko ^{[1
]}

Tsuda, Katsutoshi ^{[3
]}

Shibata, Kiko ^{[4
]}

Ishibashi, Mayu ^{[1
]}

Moriya, Chihiro ^{[5
]}

Nakagawa, Kiyotaka ^{[1
]}

Kurata, Nori ^{[3
,6
]}

Itoh, Jun-Ichi ^{[2
]}

Ito, Yukihiro ^{[1
]}

机构：

[1] Tohoku Univ, Grad Sch Agr Sci, Sendai, Miyagi 9818555, Japan

[2] Univ Tokyo, Grad Sch Agr & Life Sci, Tokyo 1138657, Japan

[3] Natl Inst Genet, Plant Genet Lab, Mishima, Shizuoka 4118540, Japan

[4] Yamagata Nishi High Sch, Yamagata 9902492, Japan

[5] Sendai Shirayuri Gakuen High Sch, Sendai, Miyagi 9813205, Japan

[6] Grad Univ Adv Studies, Sch Life Sci, Dept Genet, Mishima, Shizuoka 4118540, Japan

来源：

PLANT AND CELL PHYSIOLOGY | 2014年 / 55卷 / 01期

基金：

日本学术振兴会;

关键词：

Epidermis; Long-chain fatty acid; Organ fusion; Rice; Shoot; Very-long-chain fatty acid; FATTY-ACID ELONGASE; RECEPTOR-LIKE KINASE; CELL-DIFFERENTIATION; ARABIDOPSIS; EXPRESSION; GENE; EPIDERMIS; BIOSYNTHESIS; FIDDLEHEAD; VECTORS;

D O I：

10.1093/pcp/pct154

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Maintenance of organ separation is one of the essential phenomena for normal plant development. We have identified and analyzed ONION3 (ONI3), which is required for avoiding organ fusions in rice. Loss-of-function mutations of ONI3, which were identified as mutants with ectopic expression of KNOX genes in leaves and morphologically resembling KNOX overexpressors, showed abnormal organ fusions in developing shoots. The mutant seedlings showed fusions between neighboring organs and also within an organ; they stopped growing soon after germination and subsequently died. ONI3 was shown to encode an enzyme that is most similar to Arabidopsis HOTHEAD and is involved in biosynthesis of long-chain fatty acids. Expression analyses showed that ONI3 was specifically expressed in the outermost cell layer in the shoot apex throughout life cycle, and the oni3 mutants had an aberrant outermost cell layer. Our results together with previous studies suggest that long-chain fatty acids are required for avoiding organ fusions and promoting normal shoot development in rice.

引用

页码：42 / 51

页数：10

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