Abscisic acid and ethephon regulation of cellulase in the endosperm cap and radicle during lettuce seed germination

作     者：Bingxian Chen Jun Ma Zhenjiang Xu Xiaofeng Wang 

作者机构：Seed Science and Technology LabCollege of Life SciencesSouth China Agricultural University Agro-biological Gene Research CenterGuangdong Academy of Agricultural Sciences 

出 版 物：《Journal of Integrative Plant Biology》 (植物学报（英文版）)

年 卷 期：2016年第58卷第10期

页      面：859-869页

核心收录：

学科分类：09[农学] 0902[农学-园艺学] 090202[农学-蔬菜学] 

基　　金：funded by a grant (no.30870224) from the Natural Science Foundation of China to XW 

主　　题：Abscisic acid cellulase ethephon endosperm cap weakening lettuce seed germination 

摘      要：The purpose of this study was to investigate the role of cellulase in endosperm cap weakening and radicle elongation during lettuce （Lactuco sotiva L.） seed germination. The application of abscisic acid （ABA） or ethephon inhibits or promotes germination, respectively, by affecting endosperm cap weakening and radicle elongation. Cellulase activities, and related protein and transcript abundances of two lettuce cellulase genes, LsCEL1 and LsCEL2, increase in the endosperm cap and radicle prior to radicle protrusion following imbibition in water, ABA or ethephon reduce or elevate, respectively, cellulase activity, and related protein and transcript abundan- ces in the endosperm cap. Taken together, these observations suggest that celiulase plays a role in endosperm cap weakening and radicle elongation during lettuce seed germination, and that the regulation of cellulase in the endosperm cap by ABA and ethephon play a role in endosperm cap weakening. However, the influence of ABA and ethephon on radicle elongation may not be through their effects on cellulase.