Isoprene as a tool for plant protection against abiotic stresses

摘要

Isoprene is emitted from numerous plant species of different genera. Due to its high volatility it is rapidly lost from plant tissue into the atmosphere where it undergoes chemical reactions. Since isoprene synthesis takes place in chloroplasts, it was suggested that a link may exist between isoprene production and environmental stresses affecting the photosynthetic apparatus Isoprene synthesis is therefore of interest to the study of both atmospheric chemistry and plant biology This review presents a brief overview of studies on the role of isoprene in atmospheric chemistry and the environmental control of isoprene emission A special emphasis is placed on the physiological role of isoprene in plant defense against abiotic constrains. The physiological function of isoprene is still matter of debates It has been hypothesized that this compound may stabilize thylakoid membranes and/or may exert antioxidant properties thus increasing plant tolerance to environmental stresses. The involvement of isoprene in non-enzymatic plant defense strategy is suggested.