Abscisic acid and ethephon regulation of cellulase in the endosperm cap and radicle during lettuce seed germination
文献类型： 外文期刊
作者： Chen, Bingxian 1 ; Ma, Jun 1 ; Xu, Zhenjiang 1 ; Wang, Xiaofeng 1 ;
作者机构： 1.South China Agr Univ, Coll Life Sci, Seed Sci & Technol Lab, Guangzhou 510642, Guangdong, Peoples R China
2.Guangdong Acad Agr Sci, Agrobiol Gene Res Ctr, Guangzhou 510640, Guangdong, Peoples R China
关键词： Abscisic acid;cellulase;ethephon;endosperm cap weakening;lettuce seed germination
期刊名称：JOURNAL OF INTEGRATIVE PLANT BIOLOGY （ 影响因子：7.061； 五年影响因子：6.002 ）
ISSN： 1672-9072
年卷期： 2016 年 58 卷 10 期
页码：
收录情况： SCI
摘要： The purpose of this study was to investigate the role of cellulase in endosperm cap weakening and radicle elongation during lettuce (Lactuca sativa 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 abundances in the endosperm cap. Taken together, these observations suggest that cellulase 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.
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