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Acta Prataculturae Sinica ›› 2016, Vol. 25 ›› Issue (1): 254-261.DOI: 10.11686/cyxb2015327

• Orginal Article • Previous Articles     Next Articles

Photosynthetic responses of Arundinella hirta populations to light intensity and CO2 concentration

LIU Ying, BAI Long, LEI Jia-Jun*   

  1. College of Horticulture, Shenyang Agricultural University, Shenyang 110866, China
  • Received:2015-06-29 Online:2016-01-20 Published:2016-01-20

Abstract: Photosynthetic responses to light intensity and CO2 concentration were determined in four Arundinella hirta Tanaka populations in Liaoning province in order to provide a basis for further studies of phenotypic variation in this species. Most of the characteristic parameters were significantly different among the four A. hirta populations, suggesting that there are genetic differences between them. The Benxi (P1) and Beizhen (P2) populations showed higher yield potentials as they had higher light saturation points (1782 and 1690 μmol/m2·s, respectively), apparent quantum yields (0.0553 and 0.0564, respectively), carboxylation efficiencies (0.0568 and 0.0783 μmol/m2·s, respectively) and lower CO2 compensation points (14 and 12 μmol/mol), respectively. The Jianping (P3) and Zhangwu (P4) populations performed better with regard to drought tolerance, with lower stomata conductance (0.1227 and 0.1176 mol/m2·s, respectively) and transpiration rates (2.67 and 2.68 mmol/m2·s, respectively) and with higher water holding capacities.