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Identification and functional analysis of two alternatively spliced transcripts of ABSCISIC ACID INSENSITIVE3 (ABI3) in linseed flax (Linum usitatissimum L.)

文献类型： 外文期刊

作者： Wang, Yanyan 1 ; Zhang, Tianbao 1 ; Song, Xiaxia 1 ; Zhang, Jianping 2 ; Dang, Zhanhai 2 ; Pei, Xinwu 1 ; Long, Yan 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Biotechnol, MOA Key Lab Safety Assessment Mol AgriGMO, Beijing, Peoples R China

2.Gansu Acad Agr Sci, Crop Inst, Lanzhou, Gansu, Peoples R China

期刊名称：PLOS ONE （ 影响因子：3.24； 五年影响因子：3.788 ）

ISSN： 1932-6203

年卷期： 2018 年 13 卷 1 期

页码：

收录情况： SCI

摘要： Alternative splicing is a popular phenomenon in different types of plants. It can produce alternative spliced transcripts that encode proteins with altered functions. Previous studies have shown that one transcription factor, ABSCISIC ACID INSENSITIVE3 (ABI3), which encodes an important component in abscisic acid (ABA) signaling, is subjected to alternative splicing in both mono- and dicotyledons. In the current study, we identified two homologs of ABI3 in the genome of linseed flax. We screened two alternatively spliced flax LuABI3 transcripts, LuABI3-2 and LuABI3-3, and one normal flax LuABI3 transcript, LuABI3-1. Sequence analysis revealed that one of the alternatively spliced transcripts, LuABI3-3, retained a 6 bp intron. RNA accumulation analysis showed that all three transcripts were expressed during seed development, while subcellular localization and transgene experiments showed that LuABI3-3 had no biological function. The two normal transcripts, LuABI3-1 and LuABI3-2, are the important functional isoforms in flax and play significant roles in the ABA regulatory pathway during seed development, germination, and maturation.

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