数字农科院2.0

Genome-wide investigation and expression analysis of membrane-bound fatty acid desaturase genes under different biotic and abiotic stresses in sunflower (Helianthus annuus L.)

文献类型： 外文期刊

作者： Juanjuan Li;Ake Liu;Ullah Najeeb;Weijun Zhou;Hui Liu;Guijun Yan;Rafaqat Ali Gill;Xiaopeng Yun;Quanjiang Bai;Ling Xu

作者机构：

关键词： Biotic and abiotic stresses; Fatty acid desaturases; Gene family; Sunflower; Tandem duplication

期刊名称： Int. J. Biol. Macromol.

ISSN： 0141-8130

年卷期： 2021 年 175 卷

页码：

收录情况： JCR（2021版）

摘要： Membrane-bound fatty acid desaturase (FAD) gene family plays crucial roles in regulation of fatty acid (FA) compositions in plants. Sunflower (Helianthus annuus L.) is an important oilseed crop in the world; however, no comprehensive study on exploring the role of FAD family in relation to stress tolerance in sunflower has been performed yet. In this study, we identified 40 putative FAD genes in H. annuus (HaFAD), which were unevenly distributed across 13 of the total 17 chromosomes. Phylogenetic analysis indicated that HaFAD genes were divided into four subfamilies, as supported by highly conserved gene structures and motifs. Collinearity analysis showed that tandem duplication events played a crucial role in the expansion of HaFAD gene family. In addition, tissue-specific expression showed that 32 HaFAD genes were widely expressed in various tissues or organs of sunflower. Furthermore, qRT-PCR results revealed significant expression changes of HaFAD genes in response to abiotic (cadmium, drought) and biotic (Orobanche cumana) stresses, suggesting their important functions in response to different stresses. Therefore, our results provide insights into HaFAD gene family in response to different stresses, and some specific up-regulated genes such as HaFAD3.2, HaADS8, HaFAD2.1, and HaADS9 would be the potential candidate genes for the sunflower tolerance breeding. © 2018 Elsevier B.V.

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