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4-Coumarate-CoA Ligase-Like Gene OsAAE3 Negatively Mediates the Rice Blast Resistance, Floret Development and Lignin Biosynthesis

文献类型： 外文期刊

作者： Liu, Hao 1 ; Guo, Zhenhua 2 ; Gu, Fengwei 1 ; Ke, Shanwen 3 ; Sun, Dayuan 4 ; Dong, Shuangyu 1 ; Liu, Wei 1 ; Huang, Ming 1 ;

作者机构： 1.South China Agr Univ, Natl Engn Res Ctr Plant Space Breeding, Guangzhou, Guangdong, Peoples R China

2.Heilongjiang Acad Agr Sci, Jiamusi Rice Res Inst, Dept Rice Breeding, Jiamusi, Peoples R China

3.South China Agr Univ, Coll Agr, Dept Plant Breeding, Guangzhou, Guangdong, Peoples R China

4.Guangdong Acad Agr Sci, Plant Protect Res Inst, Guangdong Prov Key Lab High Technol, Guangzhou, Guangdong, Peoples R China

关键词： 4CL-like;Rice blast;AMPBP;Lignin;ROS

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）

ISSN： 1664-462X

年卷期： 2017 年 7 卷

页码：

收录情况： SCI

摘要： Although adenosine monophosphate (AMP) binding domain is widely distributed in multiple plant species, detailed molecular functions of AMP binding proteins (AMPBPs) in plant development and plant-pathogen interaction remain unclear. In the present study, we identified an AMPBP OsAAE3 from a previous analysis of early responsive genes in rice during Magnaporthe oryzae infection. OsAAE3 is a homolog of Arabidopsis AAE3 in rice, which encodes a 4-coumarate-Co-A ligase (4CL) like protein. A phylogenetic analysis showed that OsAAE3 was most likely 4CL-like 10 in an independent group. OsAAE3 was localized to cytoplasm, and it could be expressed in various tissues. Histochemical staining of transgenic plants carrying OsAAE3 promoter-driven GUS (b-glucuronidase) reporter gene suggested that OsAAE3 was expressed in all tissues of rice. Furthermore, OsAAE3-OX plants showed increased susceptibility to M. Oryzae, and this finding was attributable to decreased expression of pathogen-related 1a (PR1) and low level of peroxidase (POD) activity. Moreover, OsAAE3 over-expression resulted in increased content of H2O2, leading to programmed cell-death induced by reactive oxygen species (ROS). In addition, OsAAE3 over-expression repressed the floret development, exhibiting dramatically twisted glume and decreased fertility rate of anther. Meanwhile, the expressions of lignin biosynthesis genes were significantly decreased in OsAAE3-OX plants, thereby leading to reduced lignin content. Taken together, OsAAE3 functioned as a negative regulator in rice blast resistance, floret development, and lignin biosynthesis. Our findings further expanded the knowledge in functions of AMBPs in plant floret development and the regulation of rice-fungus interaction.

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