Effects of water status and temperature on leaf growth

Under the condition of Laboratory，we study the effects of water status and temperature on leaf growth of wheat and maize through the determination of leaf extension rate， _s and _L．The results shows with the increase of temperature．1eaf extension rate increases first．arrives at highest value at 27℃ and then decreases rapidly．Under different soil statuses．there are lineral correlations between leaf extension rate and water stress．The changes of soll stres and temperature bring out the changes of _p．and osmotic potential aimcauses the change of leaf extension rate．As the increase of _p，leaf extension rate increases and at the same time the co-effects of water stress and temperature on leaf extension rate of maize is biggest．