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Titolo:
Effects of salinity on growth and patterns of ions and organic solutes in five sedges (Carex spp.) with different ecological demands
Autore:
Choo, YS; Song, SD; Albert, R;
Indirizzi:
Dongeui Univ, Dept Biol, Pusanjin Gu, Pusan 614714, South Korea Dongeui Univ Pusan South Korea 614714 njin Gu, Pusan 614714, South Korea Kyungpook Natl Univ, Dept Biol, Taegu 702701, South Korea Kyungpook Natl Univ Taegu South Korea 702701 , Taegu 702701, South Korea Univ Vienna, Inst Okol & Naturschutz, A-1091 Vienna, Austria Univ Vienna Vienna Austria A-1091 & Naturschutz, A-1091 Vienna, Austria
Titolo Testata:
FLORA
fascicolo: 1, volume: 196, anno: 2001,
pagine: 71 - 80
SICI:
0367-2530(2001)196:1<71:EOSOGA>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHASEOLUS-VULGARIS L; PHOTOSYNTHETIC CAPACITY; CHEMICAL-COMPOSITION; PHYSIOTYPE CONCEPT; NON-HALOPHYTES; MINERAL ION; SALT; PLANTS; NITROGEN; BARLEY;
Keywords:
Carex; salinity; mineral ions; organic solutes; ionic balance; salt exclusion;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
44
Recensione:
Indirizzi per estratti:
Indirizzo: Choo, YS Dongeui Univ, Dept Biol, Pusanjin Gu, San 24,Kaya Dong, Pusan 614714, South Korea Dongeui Univ San 24,Kaya Dong Pusan South Korea 614714 uth Korea
Citazione:
Y.S. Choo et al., "Effects of salinity on growth and patterns of ions and organic solutes in five sedges (Carex spp.) with different ecological demands", FLORA, 196(1), 2001, pp. 71-80

Abstract

The present study examines whether halophilous Carex distans, which is adapted to saline habitats, excludes salt ions under controlled conditions andwhether the salt exclusion is also effective in nora-halophilous Carex species from oligo- (C. limosa, C. rostrata), meso- (C. pilosa) and eutrophic (C. acutiformis) habitats. For C. limosa and C. rostrata, especially from oligotrophic sites, salt is never an ecological factor; therefore, this comparison is regarded rather as a heuristic model to characterize the solute pattern of genus Carex. The five species were grown in 2 different concentrations of Na-salt (control, 10 mM and 40 mM). Salt-tolerant C. distans exhibited no visible injury symptoms, but non-halophilous species showed reducedgrowth, especially at 40 mM salt, and less NaCl excluding capacity. In conclusion, in moderate salinity (40 mM) the investigated C(Carex species showed considerable salt resistance associated with the ability to exclude Na+ (esp. C. distans) and to maintain high leaf K+ levels. Particularly, proline, betaines and sugar alcohols, known to act as 'compatible solutes', were not synthesized as a response to salinity. Although nonhalophilous Carex species showed less salt exclusion capacity than C. distans, the investigatedCarex species generally belong to the 'monocot physiotype', characterized by high K+ contents, high exclusion capacity for soil ballast ions such as Na+, Ca2+ and heavy metals and an effective overall regulation of ion absorption.

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Documento generato il 26/11/20 alle ore 11:13:44