Preliminary Study on Drought Resistance of Four Broadleaved Seedlings under Water Stress in South China

• Published in: Forest research (Beijing) Vol. 24; no. 6; pp. 760 - 767
• Main Authors: Shi, X-L, Xue, L, Ren, X-R, Feng, H-F, Zheng, W-G, Fu, J-D
• Format: Journal Article
• Language: Chinese
• Published: 01.12.2011
• Subjects: Castanopsis; Elaeocarpus; Michelia
• ISSN: 1001-1498

The drought resistance of Michelia macclurei, Elaeocarpus sylvestris, Schima superba and Castanopsis fissa seedlings was studied under artificial simulated water stress by using PEG-6000. The results are as follows: With the water stress increasing, the decrease of relative water contents in leaves of M. macclurei and S. superba seedlings was relatively small, followed by E. sylvestris, whereas that of C. fissa was the largerest. The relative conductivities of leaves of M. macclurei and S. superba seedlings increased slightly, followed by E. sylvestris, whereas that of the C. fissa increased greatly. The contents of free proline in leaves of M. macclurei and S. superba changed a little, whereas those of E. sylvestris and C. fissa increased significantly compared to the controls. The contents of soluble sugar in leaves of the four seedlings tended to increase with increasing stress intensity; the chlorophyll contents in leaves of the four seedlings fluctuated slightly with increasing stress intensity; the acti