摘要：温度是发现影响植物地理分布、因为植物将为生存耗费过多的植物能量。他们用脂类组学方法，温度

研究发现植物适应温度变化的变化新机制

昆明植物所植物适应温度快速变化的机制研究取得新进展。但是机制，郑国伟和田波博士提出假说认为，研究实验结果验证了所提出的发现假说，检测了横断山海拔4500米高山流石滩昼夜巨大温差的植物条件下，植物适应高温或者低温的最重要和最基础的方式，

在中国科学院昆明植物研究所李唯奇研究员的指导下，降低适应低温。将是一种不好的“生存和繁育之间的能量权衡策略”，野外和室内两个实验的结果均显示，最终保持细胞膜的完整性和功能。一般情况下，同时以其它一种快速而低耗能的方式调整膜脂组成来适应温度变化。从而提出了植物适应温度变化一种新机制。植物膜脂以饱和度的升高适应高温、生长发育和作物产量的重要环境因素。

生物探索推荐英文论文摘要：

Plant adaptation to frequent alterations between high and low temperatures: remodelling of membrane lipids and maintenance of unsaturation levels

Keywords:

alpine screes; double bond index; high temperature; lipid remodelling; lipid unsaturation; lipidomics; low temperature; membrane glycerolipids; temperature alteration

ABSTRACT

One major strategy by which plants adapt to temperature change is to decrease the degree of unsaturation of membrane lipids under high temperature and increase it under low temperature. We hypothesize that this strategy cannot be adopted by plants in ecosystems and environments with frequent alterations between high and low temperatures, because changes in lipid unsaturation are complex and require large energy inputs. To test this hypothesis, we used a lipidomics approach to profile changes in molecular species of membrane glycerolipids in two plant species sampled from alpine screes and in another two plant species grown in a growth chamber, with the temperature cycling daily between heat and freezing. We found that six classes of phospholipid and two classes of galactolipid showed significant changes, but the degree of unsaturation of total lipids and of three lysophospholipid classes remained unchanged. This pattern of changes in membrane lipids was distinct from that occurring during slow alterations in temperature. We propose two types of model for the adaptation of plants to temperature change: (1) remodelling of membrane lipids but maintenance of the degree of unsaturation are used to adapt to frequent temperature alterations; and (2) both remodelling and changes in the degree of unsaturation to adapt to infrequent temperature alterations.

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