All the C4 plants in the arid area of Xinjiang were identified according to the stable carbon isotope ratios contents and some related 1 iteratures. There are 278 species of C4 plants from 66 genuses in 12 families. The taxonomy, life form,geographical element and the areal - types of genera were accordingly analysis. The results showed that the families with most species orderly from Chenopodiaceae, Gramineae, Cyperaceae, Liliaceae, Polygonaceae etc. Among which,the dicotyledon more than monocotyledon of angiosperm ,there is not C4 plants in the pterido-phyte and the gymnosperm. Annual and perennial of C4 plant dominate in the arid area of Xinjiang. This reveals these species compete with a better-adapted and more powerful succession evolution. The dominant of C4 plants species occupy accounts for 10%. Among C4 plants 125 species grow in sand dune, 103 species grow in salt and alkaloid environment ,56 species grow in wet environment. Everything prove C4 plant might have higher tolerance to environmental stresses (dry and salting) and could make greater contribution to sand land restoration of botanic characters. Furthermore, The floristic composition of C4 plants is concisely enumerated and were found to belong to 10 categories, which the dominant element of the geographical composition was Mediterranea, W. Asia to C. Asia and there are 13 genera and 60 species in this region. The distribution of the florae reflects the dynamic climatic and geological changes during the species succession on a historical scale. Therefore, it is suggested to carry out the study on breeding, introduction and popularization of C4 plants and so as to solve desertification in the arid regions in northwest China. The complete investigation of the plant resources and their distribution and succession in the region will provide the scientific basis for protecting the plant resources in the region.
the arid area of XinjiangC4 plantsgeographical distributionfloral elements
国家科技期刊平台
NSTL
维普
万方数据
