Agriculture Reference
In-Depth Information
Table 7.1
Impact of PGPR inoculation on plant growth and yield
Experimental
soil
Inoculant used
Crops benefited
Response/effects
References
G. etunicatum +
Burkholderia
cepacia BAM 6
Wheat [
Triticum
aestivum
]
Loam soil
Enhanced biomass
and phosphorous
uptake
Saxena
et al. (
2013
)
Pseudomonas putida
Barley [
Hordeum
vulgare
]
Heavy loam Enhanced chlorophyll
content
Mehrvarz
et al. (
2008
)
P. fluorescence
+
Bacillus
megaterium
Chickpea [
Cicer
arietinum
]
Alluvial soil
Enhanced seedling
growth
Sharma
et al. (
2007
)
P. striata
Chickpea, soy-
bean [
Glycine
max
]
Sandy
alluvial
Increased the number
of nodules, weight
of nodules, and
grain yield
Son
et al. (
2006
)
Bradyrhizobium
+
G. fasciculatum
+
B. subtilis
Green gram
[
Vigna
radiata
(L.)
Wilczek]
Loam soil
Enhanced seed yield
Zaidi and Khan
(
2006
)
B. megaterium +
G. fasciculatum
and
G. fasciculatum
Banana [
Musa
paradisiaca
]
Acidic soil
Biomass and phos-
phorous intake
Patil
et al. (
2002
)
B. firmus
NCIM
2636
Paddy [
Oryza
spp.]
Moist and
acidic soil
Increased root bio-
mass and
phytohormones
Datta
et al. (
1982
)
(Afzal and Bano
2008
). The increase in yield of wheat was attributed to the
phosphate-solubilizing potential of PSB applied in this study as reported by others
(Kucey et al.
1989
; Ponmurugan and Gopi
2006
). The seedling length of chickpea
(Sharma et al.
2007
) was enhanced following PSB inoculation, while in other
report, co-inoculation of PSB with certain PGPR reduced P application by 50 %
without affecting corn yields (Yazdani et al.
2009
). Rhizospheric microorganisms
can interact positively in soil and improve plant growth synergistically or additively
(Zaidi et al.
2003
; Wani et al.
2007
) by enhancing N and P uptake by plants. For
example, seed yield of green gram was enhanced by 24 % following triple inocu-
lation of
Bradyrhizobium
+
Glomus fasciculatum
+
Bacillus subtilis
(Zaidi and
Khan
2006
). The synergistic effect of an arbuscular mycorrhizal fungus (AMF),
G. etunicatum
, and an indigenous PSB strain,
Burkholderia cepacia
BAM-6, was
determined against wheat plants grown in pots containing soil with low available P
to assess their potential to be used as bioinoculants in semiarid regions (Saxena
et al.
2013
). Seed yield and N concentration were remarkably enhanced by more
than 50 and 90 %, respectively, following dual inoculation. Percent root coloniza-
tion by rhizosphere population of PSB was also increased with time in soil.
Integration of half dose of NP fertilizer with biofertilizer resulted in crop yields
comparable to those obtained for full rate of fertilizer. This led to reduction in use of
