Agriculture Reference
In-Depth Information
Fig. 4.1 Plate culture
showing phosphate
solubilization by
Penicillium
chrysogenum Thom
Fig. 4.2 Plate culture
showing phosphate
solubilization by
Penicillium restrictum
Gilman and Abott
(courtesy: Dash, S. Ph.D.
Thesis: Characterization
and evaluation of
biofertilization potential of
phosphate and iron
solubilizing fungi and
rhizobia for tree legumes,
Utkal University, 2012)
A. niger strain 2 solubilized 262 mg/ml from 0.5 % TCP after 7 days growth. This
was probably the first report of TCP solubilization by any Arctic fungal strains
which could be used to prepare fungal P biofertilizer. Zeroual et al. ( 2012 ) isolated
A. niger , from agricultural soil, and tested for its ability to solubilize different P
matrixes (TCP, DCP, phosphates rock). Singh et al. ( 2012 ) isolated a total of
42 fungal isolates belonging to 12 different species from 40 soil samples of unusual
habitats of Agra region, Uttar Pradesh, India. Of these, 27 Aspergilli showed PS
activity, and 18 from 27 fungi, namely, A. clavatus , A. fumigatus , A. nidulans ,
A. niger , A. terreus , A. ustus and A. sydowii , showed comparatively more PS
activity. While comparing the PS activity of all fungi, A. niger (KH-4, KH-6 and
CH-2) had the largest PS activity which could be used in the field as biofertilizers
for supplying P to field-grown crops and, hence, increasing the crop productivity.
Rinu et al. ( 2013 ) in a follow-up experiment recovered three species of Aspergillus ,
namely, A. niger , A. glaucus and A. sydowii , from Indian Himalayan Region (IHR),
and assayed their aluminium P- and iron P-solubilizing efficiency in the presence of
different C and N sources. The P solubilized by fungal cultures varied considerably
among C and N wherein A. niger solubilized 32 % and 8 % of the supplemented
aluminium P and iron P, respectively. This result indicated that the C and N sources
influenced the PS efficiency of all the Aspergillus spp.
Search WWH ::




Custom Search