Full TGIF Record # 237769
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DOI:10.11686/cyxb20120324
Web URL(s):http://en.cnki.com.cn/Article_en/CJFDTOTAL-CYXB201203023.htm
    Last checked: 02/10/2016
Publication Type:
i
Report
Author(s):Liu, Jian-xin; Wang, Xin; Wang, Rui-juan; Jia, Hai-yan
Author Affiliation:College of Life Science and Technology, Longdong University, University Provincial Key Laboratory for Protection and Utilization of Longdong Bio-resources in Gansu Province, Qingyang, China
Title:Photosynthetic physiological response of Lolium perenne to NaHCO3 stress
Source:[Caoye Xuebao] [Acta Prataculturae Sinica]. Vol. 21, No. 3, June 20 2012, p. 184-190.
# of Pages:7
Publishing Information:[Lanzhou Shi, China]: ["Cao Ye Xue Bao" Bian Ji Wei Yuan Hui]
Abstract/Contents:"To explore the photosynthetic physiological response of forage to alkaline stress, ryegrass (Lolium perenne) seedlings grown in sands in a greenhouse were exposed to NaHCO3 at concentrations of 0, 50, 100, 150, or 200 mmol/L in Hoagland's nutrient solution. The effect of NaHCO3 stress on the photosynthetic pigment content, gas exchange and chlorophyll fluorescence parameters, and the xanthophyll cycle in the leaf was assessed. 1) With an increase in NaHCO3 concentration, the chlorophyll and carotenoid contents decreased gradually, but the chlorophyll a/b increased continuously. Net photosynthetic rate (Pn) stomatal conductance, transpiration rate, and stomatal limitation to Pn of ryegrass leaves decreased, but the intercellular CO2 concentration increased, suggesting that non-stomatal limitation was the main cause of the Pn decrease under alkaline stress. 2) The initial fluorescence and non-photochemical quenching (NPQ) increased with increasing concentration of NaHCO3, while the maximum fluorescence value (Fm), maximal photochemical efficiency (Fv/ Fm) actual yield (ΦPSII), and photochemical quenching of PS II decreased significantly. 3) With an increase in NaHCO3 concentration, the antenna efficiency at open centers in the presence of NPQ decreased, the deviation from full balance between PSI and PSII improved, the absorbed light energy allocated to the photochemical reaction of PSII reduced, while the proportion of energy lost during antenna heat dissipation increased significantly. The de-epoxidation extent of the xanthophyll cycle (A+Z)/(V+A+Z) initially increased but then decreased, suggesting that antenna heat dissipation dependant [dependent] on the xanthophyll cycle was the main mechanism for excessive energy dissipation."
Language:Chinese
References:33
Note:Abstract also appears in English
"Sum No. 98"
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Liu, J.-x., X. Wang, R.-j. Wang, and H.-y. Jia. 2012. Photosynthetic physiological response of Lolium perenne to NaHCO3 stress. (In Chinese) [Caoye Xuebao] [Acta Prataculturae Sinica]. 21(3):p. 184-190.
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DOI: 10.11686/cyxb20120324
Web URL(s):
http://en.cnki.com.cn/Article_en/CJFDTOTAL-CYXB201203023.htm
    Last checked: 02/10/2016
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