[Spin label study of the temperature stability of plant fibers]

Temperature relationship of rotation diffusion parameters of radical connected to different varieties of cotton filament, isolated from normal and with affected cotton was studied. It has been found that structural transitions accompanied with a markable increase of radical rotation diffusion in all the samples studied, proceed at definite temperatures. For filament samples from wilt-affected plants temperatures at which structural transitions proceed are higher as compared to the filaments taken from normal plants. This phenomenon point to higher micro rigidity of wilt-affected plants.