分生组织
生物
基因座(遗传学)
突变体
植物
花序
龙葵
开花位点C
拟南芥
基因
遗传学
作者
Antonia Fernández-Lozano,Fernando J. Yuste‐Lisbona,Fernando Pérez-Martín,Benito Pineda,Vicente Moreno,Rafael Lozano,Trinidad Angosto
出处
期刊:Plant Science
[Elsevier]
日期:2015-03-01
卷期号:232: 41-48
被引量:9
标识
DOI:10.1016/j.plantsci.2014.12.007
摘要
A novel tomato (Solanum lycopersicum L.) mutant affected in reproductive development, excessive number of floral organs (eno), is described in this study. The eno plants yielded flowers with a higher number of floral organs in the three innermost floral whorls and larger fruits than those found in wild-type plants. Scanning-electron microscopy study indicated that the rise in floral organ number and fruit size correlates with an increased size of floral meristem at early developmental stages. It has been reported that mutation at the FASCIATED (FAS) gene causes the development of flowers with supernumerary organs; however, complementation test and genetic mapping analyses proved that ENO is not an allele of the FAS locus. Furthermore, expression of WUSCHEL (SlWUS) and INHIBITOR OF MERISTEM ACTIVITY (IMA), the two main regulators of floral meristem activity in tomato, is altered in eno but not in fas flowers indicating that ENO could exert its function in the floral meristem independently of FAS. Interestingly, the eno mutation delayed the expression of IMA leading to a prolonged expression of SlWUS, which would explain the greater size of floral meristem. Taken together, results showed that ENO plays a significant role in the genetic pathway regulating tomato floral meristem development.
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