title: [Effects of high temperature stress on photosynthetic parameters and chlorophyll fluorescence characteristics of Xinjiang hybrid hazels].
abstract: With five temperature gradient treatments, this paper studied the effects of high temperature stress on the photosynthetic parameters and chlorophyll fluorescence characteristics of four Xinjiang hybrid hazels. When the temperature gradually raised from 25 degrees C to 45 degrees C, the net photosynthetic rate, stomatal conductance, intercellular CO2 concentration, water use efficiency and light use efficiency of the hybrid hazels decreased gradually, and the decrement was the largest at 35 degrees C - 45 degrees C. The actual photochemical efficiency of photosystem II, electron transport rate, and photochemical quenching coefficient increased slowly with increasing temperature, but decreased sharply when the temperature was raised to >35 degrees C. The water consumption for transpiration and the heat dissipation also increased with increasing temperature. Among the four hybrid hazels, Xinzhen No. 3 had higher tolerance against high temperature in photosynthesis, belonging to heat-resistant cultivar.
authors.affiliation: Afforestation and Desertification Control Research Institute, Xinjiang Forestry Academy, Urumqi 830063, China. syj504@126.com
authors.forename: Yan-Jiang
authors.initials: YJ
authors.lastname: Shi
authors.forename: Qing-Hong
authors.initials: QH
authors.lastname: Luo
authors.forename: Feng-Hui
authors.initials: FH
authors.lastname: Song
authors.forename: Tao
authors.initials: T
authors.lastname: Yu
authors.forename: Yun-Ling
authors.initials: YL
authors.lastname: Kou
mesh_terms: D000222:Adaptation, Physiological; D002681:China; D002734:Chlorophyll / Q000378:metabolism; D031211:Corylus / Q000502:physiology*; D017753:Ecosystem; D005453:Fluorescence; D006358:Hot Temperature; D010788:Photosynthesis / Q000502:physiology*; D045332:Photosystem II Protein Complex / Q000378:metabolism; D013312:Stress, Physiological
chemical_list: D045332:Photosystem II Protein Complex; D002734:Chlorophyll