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Titolo:
COMPARATIVE WATER-USE EFFICIENCIES OF 3 SPECIES OF PEPEROMIA (PIPERACEAE) HAVING DIFFERENT PHOTOSYNTHETIC PATHWAYS
Autore:
HELLIKER BR; MARTIN CE;
Indirizzi:
UNIV KANSAS,DEPT BOT LAWRENCE KS 66045 UNIV KANSAS,DEPT BOT LAWRENCE KS 66045
Titolo Testata:
Journal of plant physiology
fascicolo: 3, volume: 150, anno: 1997,
pagine: 259 - 263
SICI:
0176-1617(1997)150:3<259:CWEO3S>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
CRASSULACEAN ACID METABOLISM; COMPARATIVE ECOPHYSIOLOGY; C-3 BROMELIADS; CAM; STATISTICS;
Keywords:
PEPEROMIA CAMPTOTRICHA; PEPEROMIA OBTUSIFOLIA; PEPEROMIA SCANDENS; C-3-CAM; CO2 EXCHANGE; CRASSULACEAN ACID METABOLISM; TRANSPIRATION; WATER-USE EFFICIENCY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
25
Recensione:
Indirizzi per estratti:
Citazione:
B.R. Helliker e C.E. Martin, "COMPARATIVE WATER-USE EFFICIENCIES OF 3 SPECIES OF PEPEROMIA (PIPERACEAE) HAVING DIFFERENT PHOTOSYNTHETIC PATHWAYS", Journal of plant physiology, 150(3), 1997, pp. 259-263

Abstract

Water-use efficiencies (WUE) were compared among three species of Peperomia (Piperaceae) selected for their diversity in photosynthetic pathways. Peperomia obtusifolia is a C-3 plant that exhibits a small degree of CAM-cycling; P. camptotricha is a C-3-CAM intermediate, having relatively high rates of CO2 uptake during both the day and the night; and P. scandens is a CAM plant. All three congeners have succulent leaves and share a similar ecological niche; they typically grow as epiphytes (occasionally as terrestrials) in tropical and subtropical forests. Thus, these species of Peperomia provide an ideal set of truly comparable plants to test the long-held, but recently challenged, generalization that the WUE of CAM plants is substantially greater than that of non-CAM species. Although daytime values of WUE were lower in P. scandens than in P. obtusifolia and P. camptotricha, values of nighttime WUE and 24-hour WUE for the CAM species greatly exceeded correspondingvalues for the other two Peperomia species. Thus, the results of thisstudy support past generalizations that a high WUE is a consequence of the CAM photosynthetic pathway.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 12/08/20 alle ore 21:01:50