Wheat leaf lipids during heat stress: I. High day and night temperatures result in major lipid alterations.
Wheat leaf lipids during heat stress: I. High day and night temperatures result in major lipid alterations.
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DOI：
10.1111/pce.12649
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发表时间：
2016-04
期刊：
影响因子：
--
通讯作者：
Welti R
中科院分区：
文献类型：
--
作者：
Narayanan S;Tamura PJ;Roth MR;Prasad PV;Welti R
了解小麦（Triticum aestivum L.）植物在高温（HT）下调节脂质成分是培育气候适应性品种的关键。我们使用电喷雾电离串联质谱法在最佳和高昼夜温度下测量了小麦叶片中的165种甘油脂和固醇衍生物。高温处理下，耐热基因型文特诺和敏感基因型Karl 92的极性脂脂肪酰基链不饱和度均低于最适温度。较低的不饱和度主要是由于较低水平的18：3和较高水平的18：1和16：0酰基链。18：3-含有三酰甘油的水平增加3倍/更多的HT下，在膜脂质重塑过程中螯合脂肪酸的可能作用一致。含有奇数或氧化酰基链的磷脂在高温下积累在叶片中。甾醇苷（SG）和16：0-酰化甾醇苷（ASG）在高温下高于最适温度。与Karl 92相比，文特诺在HT下具有较低量的具有氧化酰基链的磷脂，并且具有较高量的SG和16：0-ASG。两者合计，这些数据表明，小麦叶脂质组成被改变HT，一些脂质是特别响应HT，和两个小麦基因型，选择他们不同的生理反应HT，不同的脂质谱下HT。
Understanding how wheat (Triticum aestivum L.) plants under high temperature (HT) regulate lipid composition is critical to developing climate-resilient varieties. We measured 165 glycerolipids and sterol derivatives under optimum and high day and night temperatures in wheat leaves using electrospray ionization-tandem mass spectrometry. Levels of polar lipid fatty acyl chain unsaturation were lower in both heat-tolerant genotype Ventnor and susceptible genotype Karl 92 under HT, compared to optimum temperature. The lower unsaturation was predominantly due to lower levels of 18:3 and higher levels of 18:1 and 16:0 acyl chains. Levels of 18:3-containing triacylglycerols increased 3-fold/more under HT, consistent with their possible role in sequestering fatty acids during membrane lipid remodeling. Phospholipids containing odd-numbered or oxidized acyl chains accumulated in leaves under HT. Sterol glycosides (SG) and 16:0-acylated sterol glycosides (ASG) were higher under HT than optimum temperatures. Ventnor had lower amounts of phospholipids with oxidized acyl chains under HT and higher amounts of SG and 16:0-ASG than Karl 92. Taken together, the data demonstrate that wheat leaf lipid composition is altered by HT, that some lipids are particularly responsive to HT, and that two wheat genotypes, chosen for their differing physiological responses to HT, differ in lipid profile under HT.
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影响因子：
--
作者：
Ayala A;Muñoz MF;Argüelles S
通讯作者：
Argüelles S
影响因子：
3.8
作者：
Devaiah, Shivakumar Pattada;Roth, Mary R.;Wang, Xuemin
通讯作者：
Wang, Xuemin
影响因子：
2.3
作者：
ALKHATIB, K;PAULSEN, GM
通讯作者：
PAULSEN, GM
DOI：
10.1016/0005-2736(92)90391-x
发表时间：
1992-12-09
期刊：
BIOCHIMICA ET BIOPHYSICA ACTA
影响因子：
--
作者：
HANSBRO, PM;BYARD, SJ;REID, DG
通讯作者：
REID, DG
影响因子：
4.9
作者：
Hagio, M;Sakurai, I;Wada, H
通讯作者：
Wada, H