caa a22 4500 465763685 CHVBK 20180323111907.0 cr unu---uuuuu 170327e19900201xx s 000 0 eng 10.1007/BF00238420 doi (NATIONALLICENCE)springer-10.1007/BF00238420 Post Adele School of Biological Sciences, Macquarie University, NSW 2109, Australia aut Photoprotective pigment as an adaptive strategy in the antarctic moss Ceratodon purpureus [Elektronische Daten] [Adele Post] Summary: Variation in leaf pigmentation from green to ginger is observed for Ceratodon purpureus (Hedw.) Brid. in Antarctica. Electron microscopy of ginger and green leaves reveals less thylakoid stacking, a response to greater light exposure, in the ginger leaves. In extremely exposed sites C. purpureus has low chlorophyll a/b ratios which correlate with decreased 77K chlorophyll fluorescence, indicating damage to chlorophyll a. Pigment analysis of ginger moss shows that even when the chlorophyll a/b ratio has not decreased the pigment composition differs from green moss. The increase in anthocyanin and decrease in chlorophyll concentrations largely account for the visual change from green to ginger. The ratio of total carotenoid to chlorophyll varies from 0.35 in green moss to 0.55 in the ginger moss, with violaxanthin increased preferentially. Since these changes in pigmentation are consistent with photoprotection and they are linked to light dependent variations in chloroplast structure, it appears that photoprotective pigments are a useful adaptation for the bright Antarctic environment. Springer-Verlag, 1990 Polar Biology Springer-Verlag 10/4(1990-02-01), 241-245 0722-4060 10:4<241 1990 10 300 https://doi.org/10.1007/BF00238420 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00238420 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Post Adele School of Biological Sciences, Macquarie University, NSW 2109, Australia aut NATIONALLICENCE 773 0- Polar Biology Springer-Verlag 10/4(1990-02-01), 241-245 0722-4060 10:4<241 1990 10 300 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer