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Titolo:
Effects of environmental variables on vesicular-arbuscular mycorrhizal abundance in wild populations of Vangueria infausta
Autore:
Bohrer, G; Kagan-Zur, V; Roth-Bejerano, N; Ward, D;
Indirizzi:
Ben Gurion Univ Negev, Dept Life Sci, Beer Sheva, Israel Ben Gurion Univ Negev Beer Sheva Israel pt Life Sci, Beer Sheva, Israel Ben Gurion Univ Negev, Jacob Blaustein Inst Desert Res, Mitrani Dept Desert Ecol, IL-84990 Sede Boqer, Israel Ben Gurion Univ Negev Sede Boqer Israel IL-84990 4990 Sede Boqer, Israel Ben Gurion Univ Negev, Inst Appl Res, Beer Sheva, Israel Ben Gurion Univ Negev Beer Sheva Israel st Appl Res, Beer Sheva, Israel
Titolo Testata:
JOURNAL OF VEGETATION SCIENCE
fascicolo: 2, volume: 12, anno: 2001,
pagine: 279 - 288
SICI:
1100-9233(200104)12:2<279:EOEVOV>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
PLANT COMMUNITY STRUCTURE; ZEA-MAYS-L; PHOSPHORUS-NUTRITION; TALLGRASS PRAIRIE; ROOT COLONIZATION; FUNGI; DIVERSITY; DYNAMICS; ECOSYSTEMS; FERTILIZATION;
Keywords:
Botswana; Kalahari desert; species composition; vesicular-arbuscular endomycorrhiza;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
43
Recensione:
Indirizzi per estratti:
Indirizzo: Bohrer, G Ben Gurion Univ Negev, Dept Life Sci, POB 653, Beer Sheva, Israel Ben Gurion Univ Negev POB 653 Beer Sheva Israel Sheva, Israel
Citazione:
G. Bohrer et al., "Effects of environmental variables on vesicular-arbuscular mycorrhizal abundance in wild populations of Vangueria infausta", J VEG SCI, 12(2), 2001, pp. 279-288

Abstract

Vesicular-arbuscular endomycorrhizal fungi include among its members some of the most widespread root symbiont species. It is not known whether thesefungal species show environmental or host preferences. In 13 semi-arid savanna sites in Botswana, we found positive correlations between individual environmental factors and the abundance of VAM associations in the roots of an important host, the indigenous fruit tree Vangueria infausta (Rubiaceae). The concentration of phosphorus in the leaves of the host was positively correlated with both phosphorus in the soil and the abundance of VAM associations in its roots, indicating direct benefits to the host of this association. Abundance of VAM associations was significantly different between thestudied sites and between seasons and was positively correlated with the mean annual rainfall. In addition, there was a negative correlation with phosphorus concentration in the soil. The differences between the summer and winter abundance of VAM associations were positively correlated with the density of bush cover and the amount of grazing. The apparent correlation found between the abundance of VAM in V. infausta and bush and tree community composition is presumably related to correlations between these two parameters and environmental conditions.

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Documento generato il 24/09/20 alle ore 01:13:19