Effect of the elevated temperature on Grevillea robusta A cunn ex R Br: Physiological and growth approach to understand heat stress response

Silver oak (Grevillea robusta A Cunn ex R Br), an evergreen tree belonging to family Proteaceae is native to Australia – New South Wales and Queensland. An experiment was conducted to observe the likely impact of elevated temperature on growth behavior, biomass accumulation and physiological response of seedlings of silver oak grown in pot under open top chamber conditions. The present study examined the early growth of silver oak and other related parameters under elevated temperature for two months as compared to ambient air. Results showed more growth in plant along with increased leaf area, height and number of leaves per plant. Various other parameters like leaf area index, moisture content of leaves and shoot and root were determined. The physiological traits like photosynthesis, transpiration, stomatal conductance and water use efficiency were also examined.