在Panicoideae中的DNAJ蛋白基因扩张机制和在珍珠小米中的PgDNAJ功能识别
Yarong Jin1, Jiyuan Jia1, Yuchen Yang1
1College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu, 611130, China.
概括
研究人员在珍珠小米 (PgDNAJ) 中发现了耐热DNAJ蛋白质基因. 这些基因通过激活酸盐过氧化酶 (APX) 来提高植物的耐热性,为作物适应全球变暖提供解决方案.
科学领域:
- 植物遗传学和进化研究
- 分子生物学分子生物学
- 农作物科学 农作物科学
背景情况:
- 全球变暖需要开发耐热作物.
- 像珍珠小米一样,Panicoideae亚家族的物种表现出自然的热适应性.
- 了解DNAJ蛋白质基因演变是识别抗压机制的关键.
研究的目的:
- 为了分析DNAJ蛋白质基因进化在Panicoideae.
- 确定和描述珍珠小米DNAJ基因 (PgDNAJ) 的耐热功能.
- 探索可移植元素 (TE) 在DNAJ基因扩张中的作用.
主要方法:
- 对12个Panicoideae和其他10个物种的DNAJ蛋白质基因进行比较进化分析.
- 在珍珠小米中识别和表征PgDNAJ基因.
- 对DNAJ基因附近的逆转移素 (TE) 插入模式的分析.
- 在高温应激反应中对PgDNAJ的功能分析.
主要成果:
- 79%的Panicoideae DNAJ蛋白质基因显示了逆转移子插入.
- 非核心DNAJ基因含有比核心基因更多的TE.
- 科皮亚和吉普赛的逆转移体有助于DNAJ基因扩张在Panicoideae.
- 在珍珠小米中确定了PgDNAJ基因.
结论:
- PgDNAJ通过激活亚酸盐过氧化酶 (APX) 来增强耐热性,减少反应性氧物种.
- 逆转移子插入是Panicoideae.ae中DNAJ基因家族进化的重要驱动因素.
- 这项研究为发现Panicoideae中耐热基因的发现提供了洞察力,以改善作物.
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