Biologia Plantarum

, Volume 53, Issue 2, pp 237–242 | Cite as

Growth, lipid peroxidation and photosynthesis in two tall fescue cultivars differing in heat tolerance

Original Papers


Seedlings (70-d-old) of two tall fescue (Festuca arundinacea Schreb.) genotypes, heat-tolerant Jaguar 3 and heat-sensitive TF 66, were exposed to a high temperature stress of 35/30 °C (day/night) for 20 d and both light-saturated and CO2-saturated leaf stomatal conductance decreased, especially in TF 66. Higher reductions of quantum efficiency, carboxylation efficiency and maximum photochemical efficiency of photosystem 2 in dark adapted leaves (measured as Fv/Fm) occurred in TF 66 than in Jaguar 3. High temperature stress increased photorespiration in the two plants, but more in TF 66. Moreover, high temperature stress also reduced the growth, chlorophyll content and caused cell membrane injuries in the two cultivars, the changes were again more pronounced in TF 66 than in Jaguar 3.

Additional key words

chlorophyll fluorescence Festuca arundinacea high temperature stress carboxylation efficiency stomatal conductance 



ambient CO2 partial pressure in the leaf chamber


carboxylation efficiency




leaf internal CO2 concentration


electrolyte leakage


initial chlorophyll fluorescence yield


maximum photochemical efficiency of photosystem 2 in dark adapted leaves


stomatal conductance




net photosynthetic rate


photosynthetic photon flux density


reactive oxygen species


relative stomatal limitation


quantum efficiency


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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  1. 1.School of Life SciencesNanjing UniversityNanjingP.R. China
  2. 2.Landscape DepartmentLishui UniversityZhejiangP.R. China
  3. 3.School of Life SciencesShanxi Normal UniversityXi’anP.R. China

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