Aeschbacher R A, Hauser M T, Feldmann K A, Benfey P N
Department of Biology, New York University, New York 10003.
Genes Dev. 1995 Feb 1;9(3):330-40. doi: 10.1101/gad.9.3.330.
Regulated cell expansion is an important determinant of organ shape in higher plants. The sabre mutation results in abnormal cell expansion in Arabidopsis. There is a shift in the orientation of expansion evident primarily in root cortex cells. The SABRE gene has been cloned and found to encode a novel protein. Reduction of effective levels of the plant phytohormone ethylene through use of inhibitors and an insensitive mutant resulted in partial rescue of the sabre phenotype. This suggested that one of the roles of SABRE is to counter the action of ethylene in promoting radial expansion in plant cells.
受调控的细胞扩张是高等植物器官形态的一个重要决定因素。“sabre”突变导致拟南芥细胞异常扩张。主要在根皮层细胞中明显存在扩张方向的转变。“SABRE”基因已被克隆，发现它编码一种新型蛋白质。通过使用抑制剂和一个不敏感突变体降低植物激素乙烯的有效水平，导致“sabre”表型部分恢复。这表明“SABRE”的作用之一是对抗乙烯在促进植物细胞径向扩张中的作用。
