Agriculture Reference
In-Depth Information
their effect on yield and yield components of cucumbers under field environment.
The results clearly showed that the mixture of PGPR (
Pseudomonas
sp.), strains of
P. putida
and
P. agglomerans
, and chemical fertilizers demonstrated a profound
increase in length, fresh and dry weight of roots and shoots, and yield of cucumber
plants (Isfahani and Besharati
2012
). Bacterial cultures, for instance,
Pseudomonas
sp., exhibiting high PS ability isolated from the rhizosphere soil and root cuttings of
bush black pepper (
Piper nigrum
L.) when used in combination with N
2
fixing
Azospirillum sp.
and VAM showed additive effect on black pepper under green-
house trials and reflected their potentiality as efficient P solubilizer for black pepper
growing in soils (Ramachandran et al.
2007
). In a similar way, a Gram-positive,
rod-shaped potential PSB
Bacillus
strain which shared highest sequence similarity
to
Bacillus tequilensis
NRRL B-41771T (99.5 %) produced good amount of IAA
and was positive for siderophore production. The seed inoculation with this strain
(NII-0943) resulted in significantly higher root initiation in black pepper cuttings
grown under pot experiments. The soil N and P and P and N uptake by inoculated
plants were also enhanced significantly following bacterial inoculation (Dastager
et al.
2011
).
12.5 Conclusion and Future Prospects
Even though phosphorus is an essential nutrient required for proper growth and
development of vegetable plants, it is generally unavailable due to its rapid fixation
ability with soil constituents. No doubt, PSM in this context can act as a better and
viable substitute and may supply an ample quantity of P to vegetable crops in an
inexpensive way. Therefore, researchers need to identify more and more potentially
sound PSM so that they could be developed as microbial P inoculants for raising the
production of vegetables in eco-friendly way under different agroecological
regions. Broadly, the use of PSB in vegetable cultivation has genuinely provided
an exciting and meaningful option for enhancing its production and simultaneously
preserving the inherent characteristics of diverse agroecosystems from the unpleas-
ant shock of synthetic fertilizers. The success of PSB application, however, depends
on selection and delivery of quality PSB inoculants, which requires considerable
attention of the scientists to overcome such challenges.
References
Abd El-Salam IZ, Arafa MM, Shalaby OE (2005) Effect of rock phosphate and rare earth minerals
on growth, yield, chemical constituents and active ingredients of hot pepper (
Capsicum
annuum
,
L
.) under new reclaimed soils conditions. Egypt J Appl Sci 20:285-310
Alertor O, Oshodi AA, Ipinmoroti K (2002) Chemical composition of common leafy vegetables
and functional properties of their leaf protein concentrates. Food Chem 78:63-68
