Strategies providing success in a variable habitat: III. Dynamic control of photosynthesis in Cladophora glomerata
作者： I. Ensminger , M. Xyländer , C. Hagen , W. Braune
DOI: 10.1046/J.1365-3040.2001.00725.X
关键词: Photosynthesis 、 Photosystem II 、 Chlorophyll fluorescence 、 Oxygen evolution 、 Acclimatization 、 Diurnal temperature variation 、 Horticulture 、 Xanthophyll 、 Chlorophyta 、 Botany 、 Biology
摘要: Diurnal patterns of photosynthesis were studied in July and April populations Cladophora glomerata (L.) Kutz, from open shaded sites. Summer samples exposed to full sunlight showed decreased efficiency photosystem II at noon, only slight differences found between that had grown or Electron transport rate was limited highest fluence rates shade plants, non-photochemical quenching (NPQ) revealed faster regulation Daily course de-epoxidation not linearly correlated with the NPQ. The comparison sites a higher capacity thermal energy dissipation an increase total amount xanthophyll-cycle pigments (21%) In April, down-regulation related lower water temperature, hence, increased excitation pressure. pool size by 21% summer suggested levels via de-epoxidized xanthophylls. both, spring 20% Acclimation C. growth light conditions further shown experimental induction NPQ, indicating NPQ increases 23%, 77% reversible component site samples. effect temperature on photosynthetic non-linear, different optimum temperatures electron oxygen evolution exhibited.
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