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RNA-seq Analysis Reveals Ethylene-Mediated Reproductive Organ Development and Abscission in Soybean (Glycine max L. Merr.)

文献类型： 外文期刊

作者： Cheng, Yun-Qing 1 ; Liu, Jian-Feng 1 ; Yang, Xiangdong 2 ; Ma, Rui 2 ; Liu, Chunming 1 ; Liu, Qiang 1 ;

作者机构： 1.Jilin Normal Univ, Coll Life Sci, Siping 136000, Jilin, Peoples R China

2.Jilin Acad Agr Sci, Agrobiotechnol Res Inst, Changchun 130024, Jilin, Peoples R China

关键词： Abscission;Development;Reproductive organ;RNA-Seq analysis;Soybean

期刊名称：PLANT MOLECULAR BIOLOGY REPORTER （ 影响因子：1.595； 五年影响因子：2.042 ）

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收录情况： SCI

摘要： The high level of abscission of developing reproductive organs in soybean (Glycine max L. Merr.) causes severe yield loss. The role of ethylene in hastening organ abscission has been well documented. However, little is known about the regulatory mechanism by which ethylene influences abscission in soybean. Ethylene synthesis inhibitor [0.5 mM silver thiosulfate (STS)], ethylene-releasing compound [400 mg/L ethephon (ETH)], and water were applied twice with a 5-day interval between the applications. The STS-treated plants produced more flowers and pods, resulting in 55.6 % greater seed yield. ETH treatment significantly increased (P < 0.05) the abscission rate of flowers and pods. Three digital gene expression libraries (STS-, ETH- and control library) were constructed. Illumina sequencing of the three libraries was used to identify 9.7 to 10.5 million unigenes. Strong correlations were observed among different gene expression profiles and specific metabolite groups (such as plant hormone biosynthesis and signal transduction; starch and sucrose metabolism; and secondary metabolism) suggesting the importance of these metabolic pathways during ethylene regulation. Potential ethylene target genes such as 1-aminocyclopropane-1-carboxylate (ACC)-oxidase, 2C protein phosphatases (PP2Cs), MAT1, acetyltransferase, bidirectional sugar transporter SWEET1-like, and so on were identified. These results suggest that ethylene regulates flower and pod abscission in soybean by direct transcriptional regulation of genes that are involved in the metabolic and regulatory processes related to both floral organ development and abscission. Thus, these findings further elucidate the critical role of ethylene in transcriptional regulation of reproductive organ development and abscission.

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