JOINTLESS is a MADS-box gene controlling tomato flower abscission zone development
JOINTLESS is a MADS-box gene controlling tomato flower abscission zone development
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DOI：
10.1038/35022611
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发表时间：
2000-08-24
期刊：
影响因子：
64.8
通讯作者：
Wing, RA
中科院分区：
文献类型：
--
作者：
Mao, L;Begum, D;Wing, RA
脱落是植物中的一个普遍和动态的过程，其中器官如叶，花和果实在正常发育期间以及响应于组织损伤和胁迫而脱落（1）。脱落通过植物解剖学上不同区域的细胞分离发生，称为脱落区（AZ）。在分裂过程中，植物激素乙烯刺激细胞产生降解AZ中细胞之间的中间层的酶。在完全发育的AZ中的脱落的生理学和调节是众所周知的（2，3），但其发育的分子生物学基础不是。在这里，我们报告的第一个分离的基因直接参与发展的功能植物AZ。具有无节突变（4）的番茄植物不能在其花梗上发育AZ，因此不能正常地发生花或果实的脱落。我们确定JOINTLESS作为一个新的MADS盒基因在一个不同的系统发育分支分开的花器官的功能。我们建议，在JOINTLESS的缺失帐户的无关节番茄植株花梗AZ发展的激活失败。
Abscission is a universal and dynamic process in plants whereby organs such as leaves, flowers and fruit are shed, both during normal development, and in response to tissue damage and stress(1). Shedding occurs by separation of cells in anatomically distinct regions of the plant, called abscission zones (AZs). During abscission, the plant hormone ethylene stimulates cells to produce enzymes that degrade the middle lamella between cells in the AZ. The physiology and regulation of abscission at fully developed AZs is well known(2,3), but the molecular biology underlying their development is not. Here we report the first isolation of a gene directly involved in the development of a functional plant AZ. Tomato plants with the jointless mutation(4) fail to develop AZs on their pedicels and so abscission of flowers or fruit does not occur normally. We identify JOINTLESS as a new MADS-box gene in a distinct phylogenetic clade separate from those functioning in floral organs. We propose that a deletion in JOINTLESS accounts for the failure of activation of pedicel AZ development in jointless tomato plants.