Photoprotective pigment as an adaptive strategy in the antarctic moss Ceratodon purpureus

Post, Adele

doi:10.1007/bf00238420

Cited by 49 publications

(51 citation statements)

References 21 publications

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“…Red cell walls have been reported previously in the leaves of certain other bryophyte species (Bendz et al 1962;Rudolph 1964;Rudolph & jöhnk 1982;Mentlein & vowinkel 1984;Post 1990;Post& vesk 1992;Kunz et al 1994;Kunz & Becker 1995), and the associated pigments were often described as "anthocyanin-like" compounds. They contrast with red anthocyanins in the vascular plants, which occur most commonly in solution in the cell vacuole and can be easily extracted in acidified methanol (McClure 1975).…”

Section: Species Arimentioning

confidence: 75%

Photoprotective pigments in red and green gametophytes of two New Zealand liverworts

Hooijmaijers

Gould

2007

New Zealand Journal of Botany

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Gametophytes of Jamesoniella colorata (Jungermanniaceae) and Isotachis lyallii (Isotachidaceae) produce red leaves in exposed habitats, but green leaves in shaded environments. To understand the functional significance of this colour polymorphism, the anatomy, pigment composition, optical properties, and kinetics of chlorophyll a fluorescence were compared for red and green gametophytes. Both colour morphs were structurally similar, but the red leaves held unidentified red pigment(s) firmly associated with the cell wall. Green morphs contained more chlorophylls and carotenoids, and had higher ratios of chlorophylls to carotenoids, than did the red morphs. Red leaves absorbed 10% more photosynthetically active radiation, with a maximum at 540 nm, than did the green leaves. Under high irradiance, the red leaves maintained higher apparent quantum efficiencies for photosynthesis, and had larger photochemical and non-photochemical quenching values. The data indicate that red gametophytes have the greater potential to mitigate the damaging effects of high irradiance.

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Section: Species Arimentioning

confidence: 75%

Photoprotective pigments in red and green gametophytes of two New Zealand liverworts

Hooijmaijers

Gould

2007

New Zealand Journal of Botany

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“…Anthocyanin production is unlikely to be due to the production of excess photosynthate or nutrient deficiency (see . It has been suggested that anthocyanins may provide protection against damage by high irradiances (Caldwell, Robberecht & Flint, 1983), particularly in plants like M. muralis, which show no alterations in their bulk light harvesting pigments (see Post, 1990). However, enhanced anthocyanin production was particularly evident in the lower mesopbyil cells and on the leaf undersurfaces.…”

Section: Discussionmentioning

confidence: 99%

Is acclimation required for success in high light environments? A case study using Mycelis muralis (L.) Dumort (Asteraceae)

Clabby

Horsley

1994

New Phytologist

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In the field significant differences in maximum photosynthetic O.j-exchange ratf (P,J were found between leaves oi Mycelis muralis (L.) Dumon (Asteraceae) collected from woodland and exposed habitats, with tht-highest values in the exposed sites. However, there were no differences in the P^^ of leaves collected from plants growing in grikes (fissures in the limestone pavement), or exposed limestone pavement, despite a greater than four-fold difference in the integrated daily irradiance. Lea\es of plants from the open pavement had lower photon yields (0,) and higher dark respiration rates and light compensation points, in comparison to shaded plants. Under controlled enviranmcntal conditions the highest P^, of leaves from plants subjected to variations in irradiance were found at the intermediate (8-6 mol photon m"M ') growth light level used. At the highest growth irradiance 17-3 mol photon m ^ d"') used in tht-laboratory both P,^^ and

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“…However, their production costs are small, estimated at 2% of daily net photosynthesis (Snell et al 2009). While protective ''sunscreen'' pigments are found across many mosses, lichens, and microbes, and there is clearly greater production in more exposed locations (Post 1990, Post and Vesk 1992, Lovelock and Robinson 2002, Clarke and Robinson 2008, studies quantifying the energetic or resource investment in these strategies across exposure gradients are still required. Dynamic avoidance strategies such as vertical migrations to avoid high UV have also been demonstrated in Antarctic microbial mats (Nadeau et al 1999).…”

Section: Solar Radiationmentioning

confidence: 99%

The spatial structure of Antarctic biodiversity

Convey

Chown

Clarke

et al. 2014

Ecological Monographs

314

296

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Patterns of environmental spatial structure lie at the heart of the most fundamental and familiar patterns of diversity on Earth. Antarctica contains some of the strongest environmental gradients on the planet and therefore provides an ideal study ground to test hypotheses on the relevance of environmental variability for biodiversity. To answer the pivotal question, “How does spatial variation in physical and biological environmental properties across the Antarctic drive biodiversity?” we have synthesized current knowledge on environmental variability across terrestrial, freshwater, and marine Antarctic biomes and related this to the observed biotic patterns. The most important physical driver of Antarctic terrestrial communities is the availability of liquid water, itself driven by solar irradiance intensity. Patterns of biota distribution are further strongly influenced by the historical development of any given location or region, and by geographical barriers. In freshwater ecosystems, free water is also crucial, with further important influences from salinity, nutrient availability, oxygenation, and characteristics of ice cover and extent. In the marine biome there does not appear to be one major driving force, with the exception of the oceanographic boundary of the Polar Front. At smaller spatial scales, ice cover, ice scour, and salinity gradients are clearly important determinants of diversity at habitat and community level. Stochastic and extreme events remain an important driving force in all environments, particularly in the context of local extinction and colonization or recolonization, as well as that of temporal environmental variability. Our synthesis demonstrates that the Antarctic continent and surrounding oceans provide an ideal study ground to develop new biogeographical models, including life history and physiological traits, and to address questions regarding biological responses to environmental variability and change.

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Photoprotective pigment as an adaptive strategy in the antarctic moss Ceratodon purpureus

Cited by 49 publications

References 21 publications

Photoprotective pigments in red and green gametophytes of two New Zealand liverworts

Photoprotective pigments in red and green gametophytes of two New Zealand liverworts

Is acclimation required for success in high light environments? A case study using Mycelis muralis (L.) Dumort (Asteraceae)

The spatial structure of Antarctic biodiversity

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