In arid ecosystems environmental factors such as geoclimatic conditions and agricultural practices are of major importance in shaping the diversity and functionality of plant-associated bacterial communities. Assessing the influence of such factors is a key to understand (i) the driving forces determining the shape of root-associated bacterial communities and (ii) the plant growth promoting (PGP) services they provide. Desert oasis environment was chosen as model ecosystem where agriculture is possible by the microclimate determined by the date palm cultivation. The bacterial communities in the soil fractions associated with the root system of date palms cultivated in seven oases in Tunisia were assessed by culture-independent and dependent approaches. According to 16S rRNA gene PCR-DGGE fingerprinting, the shapes of the date palm rhizosphere bacterial communities correlate with geoclimatic features along a north-south aridity transect. Despite the fact that the date palm root bacterial community structure was strongly influenced by macroecological factors, the potential rhizosphere services reflected in the PGP traits of isolates screened in vitro were conserved among the different oases. Such services were exerted by the 83% of the screened isolates. The comparable numbers and types of PGP traits indicate their importance in maintaining the plant functional homeostasis despite the different environmental selection pressures.

The date palm tree rhizosphere is a niche for plant growth promoting bacteria in the oasis ecosystem / R. Ferjani, R. Marasco, E. Rolli, H. Cherif, A. Cherif, M. Gtari, A. Boudabous, D. Daffonchio, H.-. Ouzari. - In: BIOMED RESEARCH INTERNATIONAL. - ISSN 2314-6133. - 2015(2015), pp. 153851.1-153851.11. [10.1155/2015/153851]

The date palm tree rhizosphere is a niche for plant growth promoting bacteria in the oasis ecosystem

R. Marasco;E. Rolli;
2015

Abstract

In arid ecosystems environmental factors such as geoclimatic conditions and agricultural practices are of major importance in shaping the diversity and functionality of plant-associated bacterial communities. Assessing the influence of such factors is a key to understand (i) the driving forces determining the shape of root-associated bacterial communities and (ii) the plant growth promoting (PGP) services they provide. Desert oasis environment was chosen as model ecosystem where agriculture is possible by the microclimate determined by the date palm cultivation. The bacterial communities in the soil fractions associated with the root system of date palms cultivated in seven oases in Tunisia were assessed by culture-independent and dependent approaches. According to 16S rRNA gene PCR-DGGE fingerprinting, the shapes of the date palm rhizosphere bacterial communities correlate with geoclimatic features along a north-south aridity transect. Despite the fact that the date palm root bacterial community structure was strongly influenced by macroecological factors, the potential rhizosphere services reflected in the PGP traits of isolates screened in vitro were conserved among the different oases. Such services were exerted by the 83% of the screened isolates. The comparable numbers and types of PGP traits indicate their importance in maintaining the plant functional homeostasis despite the different environmental selection pressures.
English
RNA, Bacterial; Tunisia; Arecaceae; Bacteria; Ecosystem; RNA, Ribosomal, 16S; Rhizosphere; Soil Microbiology;
Settore AGR/16 - Microbiologia Agraria
Articolo
Esperti anonimi
Pubblicazione scientifica
2015
Hindawi
2015
153851
1
11
11
Pubblicato
Periodico con rilevanza internazionale
This work was supported by the project BIODESERT GA245746 “Biotechnology from desert microbial extremophiles for supporting agriculture research potential in Tunisia and Southern Europe” (European Union), Fondazione Project BIOGESTECA n∘ 15083/RCC “Fondo per la promozione di accordi istituzionali” (Regione Lombardia, Italy) through a fellowship to RM. ER was supported by Universita degli Studi di Milano, DeFENS, European Social Fund (FSE), and Regione Lombardia (contract “Dote Ricerca”). Thanks are due to Marco Fusi for invaluable help in statistical analysis. Research reported in this publication was supported by the King Abdullah University of Science and Technology (KAUST).
scopus
pubmed
crossref
wos
datacite
Aderisco
info:eu-repo/semantics/article
The date palm tree rhizosphere is a niche for plant growth promoting bacteria in the oasis ecosystem / R. Ferjani, R. Marasco, E. Rolli, H. Cherif, A. Cherif, M. Gtari, A. Boudabous, D. Daffonchio, H.-. Ouzari. - In: BIOMED RESEARCH INTERNATIONAL. - ISSN 2314-6133. - 2015(2015), pp. 153851.1-153851.11. [10.1155/2015/153851]
open
Prodotti della ricerca::01 - Articolo su periodico
9
262
Article (author)
no
R. Ferjani, R. Marasco, E. Rolli, H. Cherif, A. Cherif, M. Gtari, A. Boudabous, D. Daffonchio, H.-. Ouzari
File in questo prodotto:
File Dimensione Formato  
Ferjani et al 2015 date palm rhizosphere is a niche for plant growth promoting bacteria in oasis ecosystem.pdf

accesso aperto

Tipologia: Publisher's version/PDF
Dimensione 1.94 MB
Formato Adobe PDF
1.94 MB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/903883
Citazioni
  • ???jsp.display-item.citation.pmc??? 12
  • Scopus 36
  • ???jsp.display-item.citation.isi??? 34
social impact