pH对淡水小球藻叶绿素荧光参数及生长的影响

doi:10.19640/j.cnki.jtau.2018.01.009

Journal of Tianjin Agricultural University ›› 2018, Vol. 25 ›› Issue (1): 38-43.doi: 10.19640/j.cnki.jtau.2018.01.009

• Researches and Scientific Notes • Previous Articles Next Articles

Effects of pH on chlorophyll fluorescence parameters and growth of Chlorella vulgaris

BO Xiang-lan, LIU Xing, CHAI Ying-hui, DOU Yong, GAO Jin-wei, JIA Xu-ying, ZHOU Wen-li^{Corresponding Author}

Tianjin Key Lab of Aqua-Ecology and Aquaculture, College of Fisheries, Tianjin Agricultural University, Tianjin 300384, China

Received:2017-09-20 Online:2018-03-20 Published:2019-11-05

Abstract

Abstract: To determine the optimum pH conditions and provide basic information for intensive production of Chlorella vulgaris, the effects of different pH values on chlorophyll fluorescence, chlorophyll content and cell density during its culture process have been studied. The results show that when pH is 9 the maximum energy conversion rate（Fv/Fm）, the actual photochemical efficiency（ΦPSⅡ）and the quantum efficiency（Yield）decreased; meanwhile, the potential energy（F_v/F₀）, relative electronic conversion rate（ETR）, chlorophyll content（CHL）and the density of Chlorella increasing trend was minimum. When pH is 7, chlorophyll fluorescence are higher than the other groups with the values 1 613.05 µg/L, 1.13×10⁷cells/mL respectively. The chlorophyll content and cell density of pH 9 treatment group were 883.82 µg/L and 6.77×10⁶cells/mL. The optimum growth pH of Chlorella is 7, and pH 9 can obviously inhibit the growth of Chlorella.

Key words: Chlorella vulgaris, chlorophyll fluorescence, chlorophyll content, cell density, pH

CLC Number:

Q945

BO Xiang-lan, LIU Xing, CHAI Ying-hui, DOU Yong, GAO Jin-wei, JIA Xu-ying, ZHOU Wen-li. Effects of pH on chlorophyll fluorescence parameters and growth of Chlorella vulgaris[J]. Journal of Tianjin Agricultural University, 2018, 25(1): 38-43.

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Effects of pH on chlorophyll fluorescence parameters and growth of Chlorella vulgaris

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