Plant adaptation to frequent alterations between high and low temperatures: remodelling of membrane lipids and maintenance of unsaturation levels.
Plant adaptation to frequent alterations between high and low temperatures: remodelling of membrane lipids and maintenance of unsaturation levels.
复制标题
DOI：
10.1111/j.1365-3040.2011.02341.x
复制
发表时间：
2011-09
期刊：
影响因子：
--
通讯作者：
Li W
中科院分区：
文献类型：
--
作者：
Zheng G;Tian B;Zhang F;Tao F;Li W
高温下降低膜脂不饱和度，低温下增加膜脂不饱和度是植物适应温度变化的主要策略之一。我们假设，这种策略不能通过植物在生态系统和环境之间的频繁变化的高和低的温度，因为脂质不饱和度的变化是复杂的，需要大量的能量输入。为了验证这一假设，我们使用了脂质组学的方法来配置文件中的分子种类的膜甘油脂的变化，在两种植物物种从高山screes和另外两种植物物种生长在一个生长室，与温度循环之间的热量和冷冻。我们发现，六类磷脂和两类半乳糖脂表现出显着的变化，但总脂质和三个溶血磷脂类的不饱和度保持不变。膜脂的这种变化模式与温度缓慢变化期间发生的变化模式不同。我们提出了两种类型的模式，植物适应温度变化：（1）重塑膜脂，但不饱和度的维持是用来适应频繁的温度变化;（2）重塑和不饱和度的变化，以适应不频繁的温度变化。
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) remodeling of membrane lipids but maintenance of the degree of unsaturation are used to adapt to frequent temperature alterations; and (2) both remodeling and changes in the degree of unsaturation to adapt to infrequent temperature alterations.
登录
查看更多内容
拟南芥冷冻和冷冻后恢复过程中质体外和质体脂质的差异降解
影响因子：
4.8
作者：
Li, Weiqi;Wang, Ruiping;Wang, Xuemin
通讯作者：
Wang, Xuemin
影响因子：
4.8
作者：
Welti, R;Li, WQ;Wang, XM
通讯作者：
Wang, XM
影响因子：
7.4
作者：
HUGLY, S;SOMERVILLE, C
通讯作者：
SOMERVILLE, C
影响因子：
46.9
作者：
Li, WQ;Li, MY;Wang, XM
通讯作者：
Wang, XM
影响因子：
6.9
作者：
Bakht, Jehan;Bano, Asghari;Dominy, Peter
通讯作者：
Dominy, Peter