Scholars@Duke publication: Diurnal responses of photosynthesis and fluorescence in Ulva rotundata acclimated to sun and shade in outdoor culture

Diurnal responses of photosynthesis and fluorescence in Ulva rotundata acclimated to sun and shade in outdoor culture

Publication , Journal Article

Henley, WJ; Levavasseur, G; Franklin, LA; Lindley, ST; Ramus, J; Osmond, CB

Published in: Marine Ecology Progress Series

1991

Thalli of Ulva rotundata were acclimated to sun (100% Io) and shade (9% Io) in outdoor tumble tanks under nutrient-sufficient conditions. Diurnal patterns were determined for areal photosynthetic O2 exchange capacity (Pm) and quantum yield, respiration (Rd), and photosystem (PS) II chlorophyll fluorescence. Net Pm was maximal at midday in sun-grown thalli and at midmorning in shade-grown thalli exposed to 100% Io. A slight afternoon decline in net Pm in shade-grown thalli exposed to 100% Io could be explained entirely by a concurrent rise in Rd. Sun thalli exhibited a larger diurnal fluctuation of net Pm which was inconsistent with photoinhibition or end product inhibition by accumulated photosynthate. This leaves endogenous control as the most likely cause, with slight modification by Rd. -from Authors

Duke Scholars

Author Joseph S. Ramus Marine Science and Conservation

Published In

Marine Ecology Progress Series

Publication Date

1991

Volume

Issue

Start / End Page

19 / 28

Related Subject Headings

Marine Biology & Hydrobiology
0608 Zoology
0602 Ecology
0405 Oceanography

Citation

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MLA

NLM

Henley, W. J., Levavasseur, G., Franklin, L. A., Lindley, S. T., Ramus, J., & Osmond, C. B. (1991). Diurnal responses of photosynthesis and fluorescence in Ulva rotundata acclimated to sun and shade in outdoor culture. Marine Ecology Progress Series, 75(1), 19–28.

Henley, W. J., G. Levavasseur, L. A. Franklin, S. T. Lindley, J. Ramus, and C. B. Osmond. “Diurnal responses of photosynthesis and fluorescence in Ulva rotundata acclimated to sun and shade in outdoor culture.” Marine Ecology Progress Series 75, no. 1 (1991): 19–28.

Henley WJ, Levavasseur G, Franklin LA, Lindley ST, Ramus J, Osmond CB. Diurnal responses of photosynthesis and fluorescence in Ulva rotundata acclimated to sun and shade in outdoor culture. Marine Ecology Progress Series. 1991;75(1):19–28.

Henley, W. J., et al. “Diurnal responses of photosynthesis and fluorescence in Ulva rotundata acclimated to sun and shade in outdoor culture.” Marine Ecology Progress Series, vol. 75, no. 1, 1991, pp. 19–28.