Comparison ofmorphological and isozymes variation on different populations in Calligonum mongolicum Photosynthetic characteristics of C4 desert species Haloxylon ammodendron and Calligonum mongolicum under different moisture conditions COMPARATIVE STUDIES ON CRYSTAL IDIOBLASTS OF FIVE DESERT C4 PLANTS Characteristic in photosynthesis,transpiration and water use efficiency of Haloxylon ammodendron and Calligonum mongolicum of desert species A study on successional trends of plant communities within aerial seeding region of the Alxa Desert The features of Calligonum mongolicum population and its expansion process in sandy habitat KRANZ ANATOMY AND C4 PHOTOSYNTHETIC CHARACTERISTICS OF TWO DESERT PLANTS, HALOXYLON AMMODENDRON AND CALLIGONUM MONGOLICUM The Grey Relatedness Analysis between the Modular Structure of Clonal Population of Calligonum mongolicum and the Environmental Factors in the Minqin Desert Effects of PEG stress on physiological characteristics of Calligonum mongolicum in different geographical provenance