A cucurbit androecy gene reveals how unisexual flowers develop and dioecy emerges
A cucurbit androecy gene reveals how unisexual flowers develop and dioecy emerges
复制标题
DOI：
10.1126/science.aac8370
复制
发表时间：
2015-11-06
期刊：
影响因子：
56.9
通讯作者：
Bendahmane, Abdelhafid
中科院分区：
文献类型：
--
作者：
Boualem, Adnane;Troadec, Christelle;Bendahmane, Abdelhafid
理解植物性别决定的进化，需要确定从雌雄花共存的雌雄同株植物到雌雄异株物种的单性个体过渡的机制。我们发现，在甜瓜和黄瓜中，雄雄基因控制雌花发育，并编码乙烯生物合成的限制酶ACS11。ACS11在与花连接的韧皮部细胞中表达，而ACS11功能丧失突变体导致雄性植物（雄雄）。CmACS11通过抑制雄性促进基因CmWIP1的表达来控制雌雄同株花的发育和雌雄花的共存。由于单性可以导致雌雄异株，我们展示了CmACS11和CmWIP1等位基因的组合如何产生人工雌雄异株。
Understanding the evolution of sex determination in plants requires identifying the mechanisms underlying the transition from monoecious plants, where male and female flowers coexist, to unisexual individuals found in dioecious species. We show that in melon and cucumber, the androecy gene controls female flower development and encodes a limiting enzyme of ethylene biosynthesis, ACS11. ACS11 is expressed in phloem cells connected to flowers programmed to become female, and ACS11 loss-of-function mutants lead to male plants (androecy). CmACS11 represses the expression of the male promoting gene CmWIP1 to control the development and the coexistence of male and female flowers in monoecious species. Because monoecy can lead to dioecy, we show how a combination of alleles of CmACS11 and CmWIP1 can create artificial dioecy.