Constraints of tolerance: why are desiccation-tolerant organisms so small or rare?
Drying to equilibrium with the air kills nearly all animals and flowering plants, including livestock and crops. This makes drought a key ecological problem for terrestrial life and a major cause of human famine. However, the ability to tolerate complete desiccation is widespread in organisms that a...
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Veröffentlicht in: | Journal of experimental biology 2006-05, Vol.209 (Pt 9), p.1575-1584 |
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container_title | Journal of experimental biology |
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creator | Alpert, Peter |
description | Drying to equilibrium with the air kills nearly all animals and flowering plants, including livestock and crops. This makes drought a key ecological problem for terrestrial life and a major cause of human famine. However, the ability to tolerate complete desiccation is widespread in organisms that are either |
doi_str_mv | 10.1242/jeb.02179 |
format | Article |
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This makes drought a key ecological problem for terrestrial life and a major cause of human famine. However, the ability to tolerate complete desiccation is widespread in organisms that are either <5 mm long or found mainly where desiccation-sensitive organisms are scarce. This suggests that there is a trade-off between desiccation tolerance and growth. Recent molecular and biochemical research shows that organisms tolerate desiccation through a set of mechanisms, including sugars that replace water and form glasses, proteins that stabilize macromolecules and membranes, and anti-oxidants that counter damage by reactive oxygen species. These protections are often induced by drying, and some of the genes involved may be homologous in microbes, plants and animals. 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source | MEDLINE; EZB-FREE-00999 freely available EZB journals; Company of Biologists |
subjects | Animals Body Size - physiology Climate Dehydration Plants - metabolism Water - metabolism |
title | Constraints of tolerance: why are desiccation-tolerant organisms so small or rare? |
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