caa a22 4500 475751701 CHVBK 20180406123525.0 cr unu---uuuuu 170329e20001101xx s 000 0 eng 10.1023/A:1026517920852 doi (NATIONALLICENCE)springer-10.1023/A:1026517920852 Proctor Michael School of Biological Sciences, University of Exeter, Hatherly Laboratories, Exeter, UK aut The bryophyte paradox: tolerance of desiccation, evasion of drought [Elektronische Daten] [Michael Proctor] Vascular plants represent one strategy of adaptation to the uneven and erratic supply of water on land. Desiccation-tolerant (DT) bryophytes represent an alternative, photosynthesising and growing when water is freely available, and suspending metabolism when it is not. By contrast with vascular plants, DT bryophytes are typically ectohydric, carrying external capillary water which can vary widely in quantity without affecting the water status of the cells. External water is important in water conduction, and results in bryophyte leaf cells functioning for most of the time at full turgor; water stress is a relatively brief transient phase before full desiccation. All bryophytes are C3 plants, and their cells are essentially mesophytic in important physiological respects. Their carbohydrate content shows parallels with that of maturing embryos of DT seeds. Initial recovery from moderate periods of desiccation is very rapid, and substantial elements of it appear to be independent of protein synthesis. Desiccation tolerance in effect acts as a device that evades the problems of drought, and in various adaptive features DT bryophytes are more comparable with (mesic) desert ephemerals or temperate winter annuals (but on a shorter time scale, with DT vegetative tissues substituting for DT seeds) than with drought-tolerant vascular plants. Kluwer Academic Publishers, 2000 Ectohydry nationallicence Photosynthesis nationallicence Poikilohydry nationallicence Protein synthesis nationallicence Rehydration nationallicence Water relations nationallicence Plant Ecology Kluwer Academic Publishers 151/1(2000-11-01), 41-49 1385-0237 151:1<41 2000 151 11258 https://doi.org/10.1023/A:1026517920852 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1026517920852 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Proctor Michael School of Biological Sciences, University of Exeter, Hatherly Laboratories, Exeter, UK aut NATIONALLICENCE 773 0- Plant Ecology Kluwer Academic Publishers 151/1(2000-11-01), 41-49 1385-0237 151:1<41 2000 151 11258 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer