1. II;JA Berry,1982
2. Cai HX, Wu FZ, Yang WQ (2011) Effects of drought stress on the photosynthesis of Salix paraqplesia and Hippophae rhamnoides seedlings. Acta Ecol Sin 31(9):2430–2436
3. Calos GM, Lorenzo L (2001) Nitric oxide induces stomatal closure and enhances the adaptive plant responses against drought stress. Plant Physiol 126:1196–1204
4. Chen J, Zhang GC, Zhang SY, Wang MJ (2008) Response processes of Araiia elata photosynthesis and transpiration to light and soil moisture. J Appl Ecol 19(6):1185–1190
5. Cui XY, Song JF, Zhang YH (2004) Some photosynthetic characteristics of fraxinus mandshurica seedlings grown under different soil water potentials. Acta Phytoecol Sin 28(6):794–802