首页|An INDEHISCENT-Controlled Auxin Response Specifies the Separation Layer in Early Arabidopsis Fruit
An INDEHISCENT-Controlled Auxin Response Specifies the Separation Layer in Early Arabidopsis Fruit
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NETL
NSTL
万方数据
维普
Seed dispersal is an important moment in the life cycle of a plant species.In Arabidopsis thaliana,it is dependent on transcription factor INDEHISCENT (IND)-mediated specification of a separation layer in the dehiscence zone found in the margin between the valves (carpel walls) and the central replum of the developing fruit.It was proposed that IND specifies the separation layer by inducing a local auxin minimum at late stages of fruit development.Here we show that morphological differences between the ind mutant and wild-type fruit already arise at early stages of fruit development,coinciding with strong IND expression in the valve margin.We show that IND-reduced PIN-FORMED3 (PIN3) auxin efflux carrier abundance leads to an increased auxin response in the valve margin during early fruit development,and that the concomitant cell divisions that form the dehiscence zone are lacking in ind mutant fruit.Moreover,IND promoter-driven ectopic expression of the AGC kinases PINOID (PID) and WAG2 induced indehiscence by expelling auxin from the valve margin at stages 14-16 of fruit development through increased PIN3 abundance.Our results show that IND,besides its role at late stages of Arabidopsis fruit development,functions at early stages to facilitate the auxin-triggered cell divisions that form the dehiscence zone.
Kasper van Gelderen、Martin van Rongen、An'an Liu、Anne Otten、Remko Offringa
展开 >
Molecular and Developmental Genetics, Institute of Biology Leiden, Leiden University, Sylviusweg 72,2333 BE Leiden, the Netherlands
Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, 3584 CH Utrecht, the Netherlands
Sainsbury Laboratory, 47 Bateman Street, Cambridge CB2 1LR, UK
K.v.G.was supported by an NWO-CW TOP grantChemical Sciences Division with financial support from the Netherlands Organisation for Scientific Research (NWO)
NETL
NSTL
万方数据
维普
