of Recent Publications
Ghulam Shabir, Muhammad Afzal, Farooq Anwar,Razia
Tahseen, Zafar Mahmood Khalid. Environmental Biotechnology
Division, National Institute for Biotechnology
and Genetic Engineering (NIBGE), P.O. Box 577,
Faisalabad, Pakistan. Biodegradation of
kerosene in soil by a mixed bacterial culture
under different nutrient conditions.
International Biodeterioration & Biodegradation,
61, 2008, 161–166.
The present investigation dealt with the biodegradation
of kerosene in soil using a mixed bacterial culture
under two different treatment setups, treatment
1 (T1) having low nutrient concentration as compared
to treatment 2 (T2). Each treatment contained
4% (w/w) kerosene in soil as a sole carbon source.
After 6 weeks of incubation, T1 and T2 exhibited
27±3% and 65±7% kerosene degradation,
respectively. The highest bacterial growth was
observed in T2 with a significant reduction in
nutrient content of soil over 2–3 weeks
of incubation. Overall, 46±12% and 54±24%
of nitrogen, 36±3% and 43±3% of
phosphorus and 24±2% and 35±2% of
potassium content of the soil were depleted under
T1 and T2, respectively. The present work has
defined nutrient requirements for kerosene oil
degradation and has opened avenues for its remediation
from contaminated soil.
Biodegradation; Bacteria; Soil; Nutrients.
CM Van Wees, Sjoerd Van der Ent and Corne´
MJ Pieterse. Plant-Microbe Interactions, Institute
of Environmental Biology, Faculty of Science, Utrecht
University, P.O. Box 800.56, 3508 TB Utrecht. Plant
immune responses triggered by beneficial microbes.
Current Opinion in Plant Biology, 11, 2008, 443–448.
Beneficial soil-borne microorganisms, such as plant
growth promoting rhizobacteria and mycorrhizal fungi,
can improve plant performance by inducing systemic
defense responses that confer broad-spectrum resistance
to plant pathogens and even insect herbivores. Different
beneficial microbe-associated molecular patterns
(MAMPs) are recognized by the plant, which results
in a mild, but effective activation of the plant
immune responses in systemic tissues. Evidence is
accumulating that systemic resistance induced by
different beneficials is regulated by similar jasmonate-dependent
and ethylene-dependent signaling pathways and is
associated with priming for enhanced defense.
microbes, soil-borne microorganisms, rhizobacteria,
CENTRE Newsletter Vol.6, No 3 September 2008