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Expression analysis of abscisic acid (ABA) and metabolic signalling factors in developing endosperm and embryo of barley

文献类型： 外文期刊

作者： Chen, Zhiwei 1 ; Huang, Jianhua 1 ; Muttucumaru, Nira 2 ; Powers, Stephen J. 3 ; Halford, Nigel G. 2 ;

作者机构： 1.Shanghai Acad Agr Sci, Biotechnol Res Inst, Shanghai 201106, Peoples R China

2.Rothamsted Res, Plant Biol & Crop Sci Dept, Harpenden AL5 2JQ, Herts, England

3.Rothamsted Res, Computat & Syst Biol Dept, Harpenden AL5 2JQ, Herts, England

关键词： Hordeum vulgare;Abscisic acid;Seed development;Signalling

期刊名称：JOURNAL OF CEREAL SCIENCE （ 影响因子：3.616； 五年影响因子：3.891 ）

ISSN： 0733-5210

年卷期： 2013 年 58 卷 2 期

页码：

收录情况： SCI

摘要： The expression of genes encoding components of ABA and metabolic signalling pathways in developing barley endosperm and embryo was investigated. The genes included HvRCAR35_47387 and HvRCAR35_2538 (encoding ABA receptors), HvABI1d (protein phosphatase 2C), HvSnRK2.4, HvSnRK2.6 and HvPKABA1 (SnRK2-type protein kinases) and HvABI5 (ABA response element binding protein; AREBP), as well as two genes encoding SnRK1-type protein kinases. Both SnRK1 and SnRK2 phosphorylate AREBPs, but SnRK2 is activated by ABA whereas SnRK1 may be broken down. Multiple cereal AREBPs with two conserved SnRK1/2 target sites and another class of BZIP transcription factors with SnRK1/2 binding sites, including HvBLZ1, were identified. Barley grain (cv. Triumph) was sampled at 15, 20, 25 and 30 days postanthesis (dpa). HvRCAR35_47387, HvABI1d, HvSnRK2.4 and HvABI5 were expressed highly in the endosperm but at much lower levels in the embryo. Conversely, HvPKABA1 and HvRCAR35_2538 were expressed at higher levels in the embryo than the endosperm, while HvSnRK2.6 was expressed at similar levels in both. HvRCAR35_47387, HvABI1d, HvSnRK2.4 and HvABI5 all peaked in expression in the endosperm at 20 dpa. A model is proposed in which ABA brings about a transition from a SnRK1-dominated state in the endosperm during grain filling to a SnRK2-dominated state during maturation. (C) 2013 The Authors. Published by Elsevier Ltd. All rights reserved.

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