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Stress tolerance of photosynthesis in sporelings of the red alga Grateloupia doryphora compared to that of stage III thalli

Journal Article


Abstract


  • More experimental evidence is needed to understand the role of propagules in macroalgal biology. There are no reports in the literature on the comparative physiology (e.g. photosynthesis) of sporelings and adults. In this paper we report on the variation in photosynthetic parameters (maximum photosynthesis, P(max), and efficiency, alpha, and dark respiration (R(d)) of cultivated young sporelings of the red alga Grateloupia doryphora (Montagne) Howe under normal conditions and after a short-term incubation at different salinities and temperatures. The results are compared to those for adult Stage III thalli obtained in laboratory culture from the same population of sporelings. The pigment composition of sporelings (more chlorophyll a and less phycoerthryn and phycocyanin than adults) promotes a better photosynthetic performance (higher P(max) and alpha and lower R(d) under chlorophyll a excitation. The younger sporelings were also more tolerant to variations in salinity and temperature than Stage III, in which the highest variation in maximum photosynthesis and dark respiration was observed.

Publication Date


  • 1997

Citation


  • Rodrigo, M., & Robaina, R. R. (1997). Stress tolerance of photosynthesis in sporelings of the red alga Grateloupia doryphora compared to that of stage III thalli. Marine Biology, 128(4), 689-694. doi:10.1007/s002270050136

Scopus Eid


  • 2-s2.0-0030872794

Web Of Science Accession Number


Start Page


  • 689

End Page


  • 694

Volume


  • 128

Issue


  • 4

Place Of Publication


Abstract


  • More experimental evidence is needed to understand the role of propagules in macroalgal biology. There are no reports in the literature on the comparative physiology (e.g. photosynthesis) of sporelings and adults. In this paper we report on the variation in photosynthetic parameters (maximum photosynthesis, P(max), and efficiency, alpha, and dark respiration (R(d)) of cultivated young sporelings of the red alga Grateloupia doryphora (Montagne) Howe under normal conditions and after a short-term incubation at different salinities and temperatures. The results are compared to those for adult Stage III thalli obtained in laboratory culture from the same population of sporelings. The pigment composition of sporelings (more chlorophyll a and less phycoerthryn and phycocyanin than adults) promotes a better photosynthetic performance (higher P(max) and alpha and lower R(d) under chlorophyll a excitation. The younger sporelings were also more tolerant to variations in salinity and temperature than Stage III, in which the highest variation in maximum photosynthesis and dark respiration was observed.

Publication Date


  • 1997

Citation


  • Rodrigo, M., & Robaina, R. R. (1997). Stress tolerance of photosynthesis in sporelings of the red alga Grateloupia doryphora compared to that of stage III thalli. Marine Biology, 128(4), 689-694. doi:10.1007/s002270050136

Scopus Eid


  • 2-s2.0-0030872794

Web Of Science Accession Number


Start Page


  • 689

End Page


  • 694

Volume


  • 128

Issue


  • 4

Place Of Publication