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1. esponse of photosynthetic and morphological characteristics to soil moisture stress for Mosla chinensis and congeneric weediness M. scabra | |||
Yijun Lu ,Ge Ying,Gu Baojing,Guan Baohua,Chang Jie | |||
Biology 11 March 2010 | |||
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Abstract:In the field investigation, we found populations of a rare species Mosla chinensis and congeneric weediness species M. scabra distribute in drought habitats frequently, while they have different performances. In order to find out how the two species response to water stress in physiology and morphology, we compared the characteristics of the two species under different soil water status in cultivation. Results showed that the largest folia diurnal net photosynthetic rate (PN), stomatal conductance (gs), water use efficiency (WUE), apical height (H) and crown diameter (CD) of M. chinensis and M. scabra were occurred at 60% and 90% soil water holding capacity (WHC) respectively, while the smallest values occurred at 20% WHC in both two species. The PN, gs, WUE, H and CD of M. chinensis were larger than those of M. scabra, while the chlorophyll a (Chl a) and Chl b contents, the physiological plasticity indices were smaller than those of M. scabra, which is more sensitivity and has smaller drought resistance to soil water status transform than M. chinensis. The height concerned traits of M. scabra increased with the increase of soil moisture, it showed that M. scabra was a resource, which increased the height to obtain more irradiance at moist soil. However, the highest values for the height concerned traits of M. chinensis happened in W60 and less than M. scabra indicated M. chinensis could not enhanced the competitive ability for irradiation and failure in community under well water conditions and become endurant species. | |||
TO cite this article:Yijun Lu ,Ge Ying,Gu Baojing, et al. esponse of photosynthetic and morphological characteristics to soil moisture stress for Mosla chinensis and congeneric weediness M. scabra[OL].[11 March 2010] http://en.paper.edu.cn/en_releasepaper/content/40575 |
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