Stress-Induced Changes of Plant Lipidomes

3 LIPIDOMICS FOR PLANT BIOLOGY 18.3.1 Stress-Induced Changes of Plant Lipidomes 

Plant membrane lipids undergo many changes when the plants are exposed to various stress conditions such as cold, heat, mechanical wounding, and phosphorus deficiency. Lipidomics allows researchers to reveal the lipid changes induced by the 

As mentioned earlier and established previously [34, 35, 44], it is well known that the degree of fatty acyl saturation in lipid species is closely related to the heat tolerance. In the studies on heat acclimation, it was also found that an increased level of fatty acyl saturation as indicated by the double-bond index in galactolipids from wild-type plants after heat acclimation is also present [6, 17]. Specifically, the double-bond index of DGDG species is reduced from 2.58 to 2.34, and the double-bond index of MGDG decreased from 2.95 to 2.84 after a heat acclimation for 24 h at 38 C. Increases in the levels of fatty acyl saturation among other major 

In another study, the changes of lipidomes in response to temperature were conducted as a temperature-dependent manner (i.e., at 4, 21, and 32 °C) by LC-MS [13]. In addition to the previous findings as described earlier, it was also found that an immediate decrease in unsaturated species of PG was present in plants under high-temperature conditions (i.e., 32 °C). This finding suggests that the reduction of unsaturation in PG species could be the first stages of adaptation to heat stress conditions. 

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