Chandra Shekhar Singh

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A plant growth-promoting isolate of a fluorescent Pseudomonas sp. EM85 and two bacilli isolates MR-11(2) and MRF, isolated from maize rhizosphere, were found strongly antagonistic to Fusarium moniliforme, Fusarium graminearum and Macrophomina phaseolina, causal agents of foot rots and wilting, collar rots/stalk rots and root rots and wilting, and charcoal(More)
A plant growth-promoting isolate of a fluorescent Pseudomonas spp. EM85 was found strongly antagonistic to Rhizoctonia solani, a causal agent of damping-off of cotton. The isolate produced HCN (HCN+), siderophore (Sid+), fluorescent pigments (Flu+) and antifungal antibiotics (Afa+). Tn5::lacZ mutagenesis of isolate EM85 resulted in the production of a(More)
Germplasm storage of Phyllanthus fraternus by using synseed technology has been optimized. Synseeds were prepared from nodal segments taken from in vitro-grown plantlets. An encapsulation matrix of 3 % sodium alginate and 100 mM calcium chloride with polymerization duration up to 15 min was found most suitable for synseed formation. Maximum plantlet(More)
Fifteen isolates of nodule bacteria were isolated from root and stem nodules ofAeschynomene aspera and they were characterized as Rhizobium by well known laboratory tests. All these isolates together with other efficient strains of known rhizobia belonging to different cross-inoculation groups were evaluated for their nodulation abilities onAeschynomene(More)
Illegal trade in snake parts has increased enormously. In spite of strict protection under wildlife act, a large number of snakes are being killed ruthlessly in India for venom and skin. Here, an interesting case involving confiscation of crystallized dried snake venom and subsequent DNA-based species identification is reported. The analysis using the(More)
Nodule number, dry weight of shoot and root biomass of legumes (Leucaena leucocephala, Glycine max, Cajanus cajan, Phaseolus mungo, Phaseolus aureus, Vigna unguiculata) were enhanced by inoculation with live yeast cells (Saccharomyces cerevisiae). Root infection (native VAM) and the formation of vesicles, arbuscules and spores were also increased with yeast(More)
Two new elemanolides, epivernodalol and lasiopulide, were isolated after chromatographic separation of the alcoholic extract of the dried aerial parts of the Vernonia lasiopus. These elemanolides are new C-10 epimers of the sesquiterpene lactones vernodalol and demethylacroylated vernodalol isolated from other species of Vernonia. Both elemanolides showed(More)
Experiments with lucerne (Medicago sativa L.) under bacteriologically controlled conditions on the effects of chloride, carbonate and bicarbonate of sodium, alkaline pH levels and saline/alkaline soil extracts demonstrated that increasing levels of salinity/alkalinity of the root medium resulted in a root system devoid of root hairs, mucilaginous layer and(More)
A field observation that roots of sandal wood tree (Santalum album (L.)) formed direct haustorial connections with root nodules of nodulating legumes was confirmed by pot culture studies on interaction between sandal wood plants and pigeonpea (Cajanus cajan (L.) Millsp.) or Pongamia glabra Vent. plants. The number of nodules and nitrogen content of plants(More)