Corpus ID: 96429115

The aquatic resurrection plant Chamaegigas intrepidus – adaptation to multiple abiotic stresses and habitat isolation

@inproceedings{Heilmeier2014TheAR,
  title={The aquatic resurrection plant Chamaegigas intrepidus – adaptation to multiple abiotic stresses and habitat isolation},
  author={Hermann Heilmeier and Wolfram Hartung},
  year={2014}
}
Chamaegigas intrepidus is a tiny poikilohydrous member of the Linderniaceae growing endemically in ephemeral rock pools on granite outcrops in Central Namibia. Habitat conditions are characterised by (1) frequent and fast desiccation and rehydration during the rainy summer season, (2) complete dehydration during the dry winter season lasting up to 11 months, (3) intensive solar irradiation and high temperatures during the dry season, (4) diurnal oscillations of pH in the pool water up to 6… Expand

Figures from this paper

HABITAT CONDITIONS, POPULATION GENETICS AND NICHE PARTITIONING OF THE NAMIBIAN RESURRECTION PLANT CHAMAEGIGAS INTREPIDUS DINTER
TLDR
The patchy spatial distribution of suitable habitats within a rather impermeable landscape matrix causes a highly structured genetic diversity in Ch. Expand

References

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TLDR
Anatomical, biochemical and physiological adaptations to this complex of extreme environmental conditions are discussed such as contractive xylem, accumulation of abscisic acid, dehydrins and carbohydrates during desiccation, and the role of amino acids, ammonium, urea and urease for nitrogen nutrition. Expand
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TLDR
Investigations in Namibia showed drastic diurnal fluctuations in the pH of the rock pools, which increased from slightly acidic or neutral conditions during the morning to alkaline conditions (up to pH 12) during late afternoon, which would be expected to affect the ABA relations in the plant. Expand
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TLDR
In vivo 31P NMR spectroscopy results imply an unusually effective regulation of intracellular pH, consistent with the adaptation of C. intrepidus to the extreme environmental conditions of its habitat. Expand
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TLDR
Anatomical, biochemical and physiological adaptations to this complex of extreme environmental conditions in Central Namibia are discussed. Expand
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TLDR
It is shown that urea can be utilised by plants in the field through the presence of urease in the sediments of the rock pools of central Namibia, and urea plays a vital role in allowing urea to be utilising as a major N source in this nutrient-limited aquatic ecosystem. Expand
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TLDR
It is concluded that amino acids, predominantly glycine and serine, can be utilised by C. intrepidus in its natural habitat and the relation of inorganic and organic nitrogen available in the pool water and the preferential utilisation of one or the other nitrogen source may change during the day corresponding with pH changes in the water. Expand
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TLDR
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TLDR
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TLDR
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