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Titolo:
A COMPARATIVE-STUDY BY DELTA-C-13-ANALYSIS OF CRASSULACEAN ACID METABOLISM (CAM) IN KALANCHOE (CRASSULACEAE) SPECIES OF AFRICA AND MADAGASCAR
Autore:
KLUGE M; BRULFERT J; LIPP J; RAVELOMANANA D; ZIEGLER H;
Indirizzi:
TH DARMSTADT,INST BOT,SCHNITTSPAHNSTR 3-5 D-64287 DARMSTADT GERMANY CNRS,BIOCHIM FONCT MEMBRANES VEGETALES LAB F-91190 GIF SUR YVETTE FRANCE GSF MUNICH,INST HYDROL MUNICH GERMANY UNIV ANTANANARIVO,PHYSIOL VEGETALE LAB,EES SCI ANTANANARIVO MALAGASY REPUBL UNIV MUNICH,INST BOT W-8000 MUNICH 2 GERMANY
Titolo Testata:
Botanica acta
fascicolo: 4, volume: 106, anno: 1993,
pagine: 320 - 324
SICI:
0932-8629(1993)106:4<320:ACBDOC>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVOLUTION;
Keywords:
AFRICA; CARBON ISOTOPE RATIO; CRASSULACEAN ACID METABOLISM (CAM); ECOPHYSIOLOGY; KALANCHOE; MADAGASCAR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
13
Recensione:
Indirizzi per estratti:
Citazione:
M. Kluge et al., "A COMPARATIVE-STUDY BY DELTA-C-13-ANALYSIS OF CRASSULACEAN ACID METABOLISM (CAM) IN KALANCHOE (CRASSULACEAE) SPECIES OF AFRICA AND MADAGASCAR", Botanica acta, 106(4), 1993, pp. 320-324

Abstract

The carbon isotope ratios (deltaC-13 values) of samples of Kalanchoe species collected in Africa were compared with previous data obtained with species from Madagascar. In contrast to the Malagasy species which cover the whole range of deltaC-13 values from - 10 to - 30 parts-per-thousand, indicating high inter- and intraspecific diversity of CAM performance, in the African species nearly all deltaC-13 values were less negative than - 18 parts-per-thousand. Thus, in the African species the CAM behaviour is characterized by CO2 uptake proceeding mainly during the night. The distribution of deltaC-13 values among the species clearly mirrors the taxonomic groups and the three sections of the genus Kalanchoe sensu lato. The Kitchingia section comprises only groups having CAM with a high proportion of carbon acquisition by the C3-pathway of photosynthesis. The same holds true for the first three groups of the Bryophyllum section, whereas in the following groups of the section CAM with CO2 proceeding mainly during the might is common. The latter CAM mode is typical also for the majority of groups and speciesin the section Eukalanchoe. The African Kalanchoe species belong to the Eukalanchoe section, whereas in Madagascar all three sections are abundant. The data support the view that the centre of adaptive radiation of the genus is located in Madagascar. They also suggest that high CAM variability is abundant in the more primitive taxa of the genus, whereas the phylogenetically more derived taxa show a stereotype CAM with CO2 uptake taking place only during the night.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 10/07/20 alle ore 15:58:28