葡萄NHX基因家族的鉴定和表达分析Identification and expression analysis of NHX genes family in grape
卢世雄;许春苗;何红红;梁国平;王萍;陈佰鸿;毛娟;
摘要(Abstract):
【目的】探究葡萄NHX基因家族生物信息学特性及在非生物胁迫下的表达情况,以期筛选出与非生物胁迫相关的家族成员,从而为葡萄抗逆性研究提供理论依据。【方法】以拟南芥、水稻及胡扬NHX基因序列为基础,对葡萄NHX基因进行同源克隆、染色体定位、氨基酸组成成分、理化性质、motif、蛋白质二级结构以及基因芯片表达等分析,同时利用qRT-PCR技术分析葡萄NHX基因家族表达情况。【结果】葡萄NHXs可分为2个亚族,主要分布在第1、5、7、14、15、19号染色体上,其外显子数为12~23个;VvNHX06的氨基酸数最少,有291个,VvNHX07的氨基酸数最多,有1141个。Motif分析发现,N端含有典型的锌指结构,蛋白质二级结构以α-螺旋和无规则卷曲为主。亚细胞定位预测发现,葡萄NHX基因主要分布在细胞膜、内质网、线粒体、液泡和细胞质中。基因芯片表达显示,使用NaCl、ABA和PEG处理后,葡萄叶片中VvNHX02和VvNHX06基因表达量均呈上升趋势。qRT-PCR分析结果表明,在200 mmol·L~(-1)NaCl、100 mmol·L~(-1)ABA处理后的葡萄叶片中,VvNHX06表达量显著增加,分别是对照的30倍和60倍。用10%PEG处理实验材料6 h后,VvNHX05的表达量明显增加,是对照的5倍。【结论】VvNHX05和VvNHX06基因与植物耐盐和抗旱性有密切关系,可为葡萄的逆境胁迫机制研究提供参考。
关键词(KeyWords): 葡萄;NHX基因家族;胁迫;qRT-PCR
基金项目(Foundation): 国家自然科学基金(31460500);; 甘肃省葡萄酒产业发展专项资金;; 甘肃省科技重大专项(18ZD2NA006)
作者(Author): 卢世雄;许春苗;何红红;梁国平;王萍;陈佰鸿;毛娟;
Email:
DOI: 10.13925/j.cnki.gsxb.20180361
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