Abstract:
The contamination of crops because of irrigation with arsenic contaminated water
causing problem in human health in Bangladesh. Mycorrhizal fungi can reduce the
contamination of arsenic toxicity to the crops. This study were conducted the mycorrhizal
status of different crop roots collected from different arsenic (As) affected villages of
Sonargaon area and also examined the role of arbuscular mycorrhizal fungi on some
selected crops (wheat, spinach and red amaranthus) grown _inarsenic amended soil. Plants
were grown with or without arbuscular mycorrhizal fungi (AMF) inoculation in soil
amended with three levels of arsenic solution (1Oppm.1OOppmand 500ppm). The higher
concentration of arsenic contaminated soil affected the seed germination. At 500ppm,
treated soil completely inhibited seed germination of red amaranthus but little
germination was found in wheat and spinach.' A positive germination response to AMF
was observed in all the selected crops. Root length, shoot height, leaf number, fresh and
dry weight of shoot and root, mycorrhizal root colonization, per cent vigority, nutrient
(N, P, K and S) uptake increased significantly due to mycorrhizal infection and decreased
significantly with increasing arsenic concentrations. Mycorrhizal inoculation reduced As
concentration in shoots of red amaranthus. Thus, crops with compatible AMF inoculation
can minimize arsenic toxicity and increase plants growth and nutrient uptake.
Description:
A Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka
in Partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
PLANT PATHOLOGY
