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From
Analysis of the Cultivable Endophytic Bacterial Diversity in the Date Palm (
Phoenix dactylifera
L.) and Evaluation of Its Antagonistic Potential against Pathogenic Fusarium Species that Cause Date Palm Bayound Disease
Rayda Siala, Ines Ben Chobba, Tatiana Vallaeys, Mohamed Ali Triki, Mouna Jrad, Manel Cheffi, Imen Ayedi, Amine Elleuch, Ahmad Nemsi, Frederique Cerqueira, Radhouane Gdoura, Noureddine Drira, Néji Gharsallah
Journal of Applied & Environmental Microbiology
.
2016
, 4(5), 93-104 doi:10.12691/jaem-4-5-2
Fig
ure
1.
Phylogenetic tree of strains isolated from date palm and related species based on 16S rDNA sequences by the maximum parsimony analysis. The bootstrap percentages of more than 50% are shown above each branch.
a.
The
Bacilliaceae
with
Bacillus lentus
as the outgroup,
b.
The
Alcaligenaceae
with
Achromobacter denitrificans
as the outgroup,
c.
The
Microbacteriacea
with
Microbacterium flavescens
as the outgroup,
d.
The
Micrococcaceae
with
Arthrobacter roseus
as the outgroup,
e.
The
Enterobacteriaceae
with
Serratia liquefaciens
as the outgroup,
f.
The
Moraxellaceae
with
Acinetobacter gerneri
as the outgroup and
g.
The
Pseudomonadaceae
with
Pseudomonas putida
as the outgroup
Full size figure and legend
Fig
ure
2.
Antagonistic effect of bacterial palm endophytes (A)
A. agilis
and (B)
B. sublilis
on
Fusaria
as evaluated by dual-culture on PDA medium after 7 days
.
(a)
Fusarium solani
from potato tree, (b)
Fusarium oxysporum
from olive tree and (c)
Fusarium oxysporum
from palm date tree
Full size figure and legend
Fig
ure
3.
Growth inhibition (%) of different
Fusarium
spp (Fo:
Fusarium oxysporum
, Fs:
Fusarium solani
and Foa:
Fusarium oxysporum f. sp.
albidinis)
induced by palm endophytic bacterial isolates (1: Acinetobacter calcoaceticus
;
2:
Arthrobacter
agilis
;
3:
Achromobacter piechaudii
;
4:
Serratia nematodiphila
;
5:
Pseudomonas sp
;
6:
Microbacterium aerolatum
;
7:
Microbacterium barkeri
;
8:
Serratia
rubidaea
;
9:
Bacillus cereus
;
10:
Bacillus
subtilis
;
11:
Bacillus safensis
and
12:
Bacillus sonorensis
using the dual culture methods. Percentages were determinate (a) after 7 days and (b) after 15 days incubation
Full size figure and legend