UVB TOLERANCE MECHANISMS IN MEDICINALLY IMPORTANT PLANT SIMAROUBA GLAUCA: EPICUTICULAR WAX AND LIPID PEROXIDATION

Patil Sarika S.; D. K. Gaikwad

Volume : VI, Issue : IX, September - 2016

UVB TOLERANCE MECHANISMS IN MEDICINALLY IMPORTANT PLANT SIMAROUBA GLAUCA: EPICUTICULAR WAX AND LIPID PEROXIDATION

Patil Sarika S. , D. K. Gaikwad

Abstract :

Simarouba glauca is medicinally important oil yielding evergreen tree which is environmentally sturdy. 10h/day UVB (280–320nm) irradiation treatments of 4, 8,12and16days were applied to one year old seedlings. While control plants were kept in normal sunlight. It was noticed that, the epicuticular wax content was elevated by 40% over the control and which further remains stable in 8, 12, and 16 days of UV–B exposed plants. The slight increase in MDA level in response to UV–B irradiations was noticed and this increase was about 5.20% over the control. The plants exposed to UV–B irradiation showed the stable lipid peroxidation indicating 5.20% increase in the Malone di aldehyde (MDA) which is directly proportional to lipid peroxidation. It indicates that the memane fluidity is stable showing slight leakiness exhibiting a slight damage to the functional proteins, which is further reflected in the slight (2 to 5%) increase in electrolyte leakage. The elevation in epicuticular wax might be contributing for the development of thick waxy cuticle and it helps to reflect the UV–B radiations and protects the internal tissues from UV–B damage.This property of S. glauca leaves might be helpful to develop thick green belts in the regions of which uvb radiations.Thus this species is suitable for the development green belts to reduce UVBradiation effects on human beings