Chin J Plan Ecolo ›› 2003, Vol. 27 ›› Issue (4): 516-521.doi: 10.17521/cjpe.2003.0075

• Research Articles • Previous Articles     Next Articles

The Responses of Calligonum caput-medusae to Changes of Water Conditions Under Natural Environment

LI Xiang-Yi, Frank M. THOMAS, Andrea FOETZKI, ZENG Fan-Jiang, ZHANG Xi-Ming, HE Xing-Yuan   

  • Online:2015-11-04 Published:2003-04-10
  • Contact: FAN Jiang-Wen


In the Taklamakan desert region, water is the most important limiting factor to influence plant growth and distribution. The study of water relations is necessary to provide an ecological basis for the sustainable management of the vegetation at the transition between oasis and sandy desert to protect oasis environments. At the same time, the study also provided theory about how to use the limited water resources to regenerate vegetation. In the southern fringe of the Taklamakan desert Calligonum caput-medusae Schrenk (Polygonaceae) is an introduced species which serves as important shelter vegetation against sand drift at the foreland of the oasis. We investigated: 1) the degree to which plants suffered water stress during flooding conditions in summer; 2) the adaptability of physiological characters in water relations to this extreme environment; 3) the effect of irrigation on water status of vegetation (utilizing summer flooding). From April to October in 1999, around the 20th of each month, the predawn water potential (Ψp; between 5∶00 and 6∶00) and the afternoon water potential (Ψ; between 13∶00 and 14∶00) were measured using pressure chambers on six plants with three measurements per plant. Following the measurements of water potential, the pressure and volume (PV) curves from three or four samples were established. The results showed C. caput-medusae kept positive turgor during the growing season. Development of water deficit was not severe and the water stress that plants suffered was still in the normal range. Thus, the water stress induced by drought is not severe enough to threaten the survival of the artificial vegetation. During the growing season, C. caput-medusae still maintained relatively high water potential and osmotic potential as the environmental stress increased. At the same time, no experimental evidence indicated that the accumulation of solute (NsDM) reached high levels either. Therefore, the physiological process of plants still worked in normal conditions. The relative water content (RWCp) always remained high during the growing season, which was helpful to plants to prevent excess water loss in drought environments. Maintaining high level RWCp would be the adaptability of the plant to the extreme environment of the Taklamakan desert. Those adaptabilities of physiological characters exhibited in C. caput-medusae indicated the type of the plant to adapt drought environmental stress is resistance. The drought-adapted physiology of C. caput-medusae at the leaf level was mainly shown in an increase in the proportion of apoplasm, bulk modulus of elasticity (εmax), long standing high relative water content (RWCp), and increased RWCp and WCsat after irrigation. Irrigation in summer by flooding is helpful to recover the water status of C. caput-medusae and is probably one of the important reasons that the vegetation avoids serious water stress.

No related articles found!
Full text



[1] Zhi-Duan Chen, Tuo Yang, Li Lin, Li-Min Lu, Hong-Lei Li, Miao Sun, Bing Liu, Min Chen, Yan-Ting Niu, Jian-Fei Ye, Zhi-Yong Cao, Hong-Mei Liu, Xiao-Ming Wang, Wei Wang, Jing-Bo Zhang, Zhen Meng, Wei Cao, Jian-Hui Li, Sheng-Dan Wu, Hui-Ling Zhao, Zhong-Jian Liu, Zhi-Yuan Du, Qing-Feng Wang, Jing Guo, Xin-Xin Tan, Jun-Xia Su, Lin-Jing Zhang, Lei-Lei Yang, Yi-Ying Liao, Ming-He Li, Guo-Qiang Zhang, Shih-Wen Chung, Jian Zhang, Kun-Li Xiang, Rui-Qi Li, Douglas E. Soltis, Pamela S. Soltis, Shi-Liang Zhou, Jin-Hua Ran, Xiao-Quan Wang, Xiao-Hua Jin, You-Sheng Chen, Tian-Gang Gao, Jian-Hua Li, Shou-Zhou Zhang, An-Ming Lu, China Phylogeny Consortium. Tree of life for the genera of Chinese vascular plants[J]. J Syst Evol, 2016, 54(4): 277 -306 .
[2] ZHANG Cheng Yi, YU Fei Hai, DONG Ming. Effects of Sand Burial on the Survival, Growth, and Biomass Allocation in Semi-shrub Hedysarum laeve Seedlings[J]. J Integr Plant Biol, 2002, 44(3): 337 -343 .
[3] Yu Wang,Huiyong Zhang,Peng Xiang,Youyin Ye,Gengming Lin,Qingliang Yang,Mao Lin. Observing the morphological features of Emiliania huxleyi coccoliths using atomic force microscopy[J]. Biodiv Sci, 2016, 24(7): 847 -854 .
[4] LI Jun-De YANG Jian WANG Yu-Fei. Aquatic Plants in the Miocene Shanwang Flora[J]. Chin Bull Bot, 2000, 17(专辑): 261 .
[5] XU Jing-Xian WANG Yu-Fei YANG Jian PU Guang-Rong ZHANG Cui-Fen. Advances in the Research of Tertiary Flora and Climate in Yunnan[J]. Chin Bull Bot, 2000, 17(专辑): 84 -94 .
[6] Yuanjie Xu,Dunmei Lin,Ming Shi,Yanjie Xie,Yizhi Wang,Zhenhua Guan,Jianying Xiang. Spatial heterogeneity and its causes in evergreen broad-leaved forests in the Ailao Mountains, Yunnan Province[J]. Biodiv Sci, 2017, 25(1): 23 -33 .
[7] Yao Zhao,Jiakuan Chen. The origin of crops in the Yangtze River Basin and its relevance for biodiversity[J]. Biodiv Sci, 2018, 26(4): 333 -345 .
[8] TAN Ying-, Wang-Zhi-, Sui-Xue-Yi-, Hu-Guang-Wan. The Systematic Placement of the Monotypic Genus Paraisometrum (Gesneriaceae) Based on Molecular and Cytological Data[J]. Plant Diversity, 2011, 33(5): 465 -476 .
[9] LI Sheng-Sheng,WANG Shi-Jun, BEI Yue-Min. On Some Dispersed Cordaitean Cuticles from Cathaysian Flora in the Permian of China and Their Significance[J]. J Integr Plant Biol, 2003, 45(5): 517 -522 .
[10] GONG Ji-Rui, HUANG Yong-Mei, GE Zhi-Wei, DUAN Qing-Wei, YOU Xin, AN Ran, ZHANG Xin-Shi. ECOLOGICAL RESPONSES TO SOIL WATER CONTENT IN FOUR HYBRID POPULUS CLONES[J]. Chin J Plan Ecolo, 2009, 33(2): 387 -396 .