Journal article


Pulse amplitude modulated fluorescence in the green macrophytes, Codium abherens, Enteromorpha muscoides, Ulva gigantea und Ulva rigida, from the Atlantic coast of Southern Spain.


Publication Details
Author(s): Häder DP, Lebert M, Jiménez C, Salles S, Aguilera J, Flores-Moya A, Mercado J, Viñegla B, Figueroa FL
Publication year: 1999
Volume: 41
Pages range: 247 - 255
ISSN: 0098-8472

Abstract

The effect of ambient and enhanced solar radiation on the photosynthetic apparatus in four marine green macroalgae on the Southern coast of Spain (Strait of Gibraltar) was investigated using pulse amplitude modulation (PAM) fluorescence. The dependence of the fluorescence parameters on the irradiance of the actinic light was determined for all four species. It showed that maximal fluorescence after light adaptation (Fm′), photochemical quenching (qP) and the photosynthetic quantum yield decreased in Enteromorpha muscoides with irradiance while non-photochemical quenching (qN) rose continuously. In Ulva rigida the photosynthetic quantum yield dropped at irradiances above 4 W m−2 but qP did not decrease with increasing light. qN quenching rose sharply above 37 W m−2, and maximal fluorescence dropped above 1 W m−2. In Ulva gigantea the yield dropped to zero at irradiances of 37 W m−2, as did qP at 53 W m−2. qN started from an intermediate level and increased to a maximum at the highest irradiances. In Codium adherens, the yield and qP behaved similarly as in U. rigida, while qN rose at much lower irradiances. All investigated algae suffered from photoinhibition even at their natural sites of growth when the sun is at high angles. The hypothesis that algae with flat thalli suffer more than those with massive ones was confirmed. Photoinhibition was less pronounced in U. rigida and C. adherens than in the other two species. After 1 h of exposure to solar radiation at the surface, the photosynthetic quantum yield decreased substantially in the surface algae E. muscoides and U. rigida. In both macroalgae, recovery of the photosynthetic quantum yield was almost complete after 2–3 h in the shade. Two other green algae from shaded habitats (U. gigantea and C. adherens) did not show complete recovery of the yield from photoinhibition. This confirms the second hypothesis that sun-adapted algae recover faster from photoinhibition than those adapted to shaded sites.



How to cite
APA: Häder, D.-P., Lebert, M., Jiménez, C., Salles, S., Aguilera, J., Flores-Moya, A.,... Figueroa, F.L. (1999). Pulse amplitude modulated fluorescence in the green macrophytes, Codium abherens, Enteromorpha muscoides, Ulva gigantea und Ulva rigida, from the Atlantic coast of Southern Spain. Environmental and Experimental Botany, 41, 247 - 255. https://dx.doi.org/10.1016/S0098-8472(99)00007-6

MLA: Häder, Donat-Peter, et al. "Pulse amplitude modulated fluorescence in the green macrophytes, Codium abherens, Enteromorpha muscoides, Ulva gigantea und Ulva rigida, from the Atlantic coast of Southern Spain." Environmental and Experimental Botany 41 (1999): 247 - 255.

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