Effect of high night temperature on storage lipids and transcriptome changes in developing seeds of oilseed rape.
Effect of high night temperature on storage lipids and transcriptome changes in developing seeds of oilseed rape.
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夜间高温对油菜种子贮藏脂质及转录组变化的影响
DOI：
10.1093/jxb/ery004
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发表时间：
2018-03-24
影响因子：
6.9
通讯作者：
Jiang L
中科院分区：
文献类型：
--
作者：
Zhou L;Yan T;Chen X;Li Z;Wu D;Hua S;Jiang L
夜间高温会增强赤霉素信号传导和参与脂肪酸分解代谢的基因的活性，从而降低种子的总脂肪酸并增加 18 碳不饱和脂肪酸的比例。全球变暖导致热带和亚热带地区夜间气温上升速度快于白天气温。关于夜间高温对油菜储存脂质和转录组变化的影响知之甚少。本研究比较了夜间高温和低温下两个油菜品种种子中的总脂肪酸和脂肪酸组成。还分析了他们的转录组图谱。夜间高温显着影响了低含油品种酒二13和浙优50种子中的总脂肪酸和脂肪酸组成，导致总脂肪酸分别减少了18.9%和13.7%。特别是，夜间高温降低了两个品种中C18:0和C18:1的相对比例，但增加了C18:2和C18:3的比例。对转录组图谱的深入分析表明，夜间高温上调了夜间的赤霉素信号传导。这种上调与脂肪酸分解代谢相关基因的活跃表达有关，例如β-氧化和乙醛酸代谢途径中的基因。尽管之前已经研究过温度对植物脂质的影响，但本研究首次关注夜间温度及其对种子脂肪酸组成的影响。
High night temperature lowers the total fatty acids of seed and increases the proportion of 18-carbon unsaturated fatty acids by enhancing gibberellin signaling and the activity of the genes involved in fatty acid catabolism. Global warming causes a faster increase of night temperature than of day temperature in tropical and subtropical zones. Little is known about the effect of high night temperature on storage lipids and transcriptome changes in oilseed rape. This study compared the total fatty acids and fatty acid compositions in seeds of two oilseed rape cultivars between high and low night temperatures. Their transcriptome profiles were also analyzed. High night temperature significantly affected the total fatty acids and fatty acid compositions in seeds of both low and high oil content cultivars, namely Jiuer-13 and Zheyou-50, thereby resulting in 18.9% and 13.7% total fatty acid reductions, respectively. In particular, high night temperature decreased the relative proportions of C18:0 and C18:1 but increased the proportions of C18:2 and C18:3 in both cultivars. In-depth analysis of transcriptome profiles revealed that high night temperature up-regulated gibberellin signaling during the night-time. This up-regulation was associated with the active expression of genes involved in fatty acid catabolism, such as those in β-oxidation and glyoxylate metabolism pathways. Although the effect of temperature on plant lipids has been previously examined, the present study is the first to focus on night temperature and its effect on the fatty acid composition in seeds.
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影响因子：
2
作者：
DORNBOS, DL;MULLEN, RE
通讯作者：
MULLEN, RE
甘蓝型油菜种子含油量的母体控制：长角果壁光合作用的作用
影响因子：
7.2
作者：
Hua, Wei;Li, Rong-Jun;Wang, Han-Zhong
通讯作者：
Wang, Han-Zhong
种子脂肪酸还原剂作用于赤霉素信号通路下游，降低拟南芥种子脂肪酸储存
影响因子：
7.3
作者：
Chen, Mingxun;Du, Xue;Jiang, Lixi
通讯作者：
Jiang, Lixi
影响因子：
4.8
作者：
O'Quin, Jami B.;Bourassa, Linda;Dyer, John M.
通讯作者：
Dyer, John M.
影响因子：
7.3
作者：
Iyer, Vidya V.;Sriram, Ganesh;Shanks, Jacqueline. V.
通讯作者：
Shanks, Jacqueline. V.