, 44:542 | Cite as

Changes in photosynthetic and growth characteristics of Leymus chinensis community along the retrogression on the Songnen grassland in northeastern China

  • L.-X. Shi
  • J.-X. Guo
Original Papers


Net photosynthetic rate, stomatal conductance, ratio of sub-stomatal to atmospheric CO2 concentration, transpiration rate, and water use efficiency changed significantly and assimilation capacity dropped continuously along the salinization and alkalinization process in the afternoon. Assimilation capacity of L. chinensis leaf correlated negatively with the degree of salinization and alkalinization. The photosynthetic characteristics of L. chinensis determined its community formation. By changing the ratio of chlorophyll a/b in leaves and accumulating soluble saccharides in rhizome, L. chinensis could adapt to the saline-alkali condition.

Additional key words

carotenoids chlorophyll CO2 concentration retrogressive succession salinity and alkalinity gradients stomatal conductance transpiration rate water use efficiency 



atmospheric CO2 concentration


sub-stomatal CO2 concentration






transpiration rate


electrical conductivity


stomatal conductance


net photosynthetic rate


water use efficiency


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Copyright information

© Institute of Experimental Botany, ASCR 2006

Authors and Affiliations

  1. 1.Key Laboratory for Vegetation Ecology, Ministry of Education, Institute of Grassland ScienceNortheast Normal UniversityChangchunChina

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