Biopolymers and cell. 2009; 25 (2): 85 - 94

Plant sulfolipid. III. Role in adaptation

O. I. Kosyk, A. A. Okanenko, N. Yu. Taran

National Taras Shevchenko University, 64 Volodymyrska str, Kyiv, Ukraine, 01033

The quality and/or relative content of plant sulfoquinovosyl diacylglycerol (SQDG) change in response to a stress action. Various types of stress action induce two types of response – more general to the oxidative stress and specific – to a concrete stress factor. Besides, two types of reaction take place in photosynthesizing and non-photosynthesizing tissues. SQDG molecules take part in the adaptation reaction being cytochrome oxidase, CF₁, F₁, ATPase regulators, protectors and stabilizing agents for D₁/D₂ dimers and LHC II. This compound in non-photosynthesising tissues could be connected with negative charge domination required for lipoprotein complex stabilisation. SQDG quantitative changes and acyl composition shifts take place at both abiotic and biotic factors impact.

Keywords: sulfolipid, sulfoquinovosyl diacylglycerol, stress.