Stomatal, mesophyll and biochemical limitations to soil drought and rewatering in relation to intrinsic water-use efficiency in Manchurian ash and Mongolian oak oleh K. ZHU, F.H. YUAN, A.Z. WANG, J.B. WU, D.X. GUAN, C.J. JIN, J. FLEXAS, C.J. GONG, H.X. ZHANG, Y.S ZHANG