Changes in plant growth, bio chemical constituents, metal uptake and antioxidant enzyme activities in green gram under iron and manganese stress
Loading...
Date
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Mung bean [Vigna radiata L. Wilczek] is one of the most important pulse
crops in India. This commonly grown pulse crop belongs to the family Fabaceae.
Naturally, metal occurs in soils, which may be beneficial or toxic to the environment.
Although excess of metals may produce some common effects on plants in general,
there are many cases of specific effects of individual metal on different plants.
Particularly, Iron and manganese both play an important role in plant growth and
development. Excessive concentrations of manganese and iron can alter various
metabolic processes in plant system. Keeping the above fact in view the present
investigation was conducted in Dept. of agricultural biotechnology, college of
agriculture, OUAT, Bhubaneswar. Vigna radiata var. OUM II-5 was tested under
different concentrations of manganese (control, 50, 100, 150 and 200 mg/kg of soil)
and iron control, 100, 200, 300 and 500mg/kg of soil) through pot culture with three
replications of completely randomized design. The experiment was conducted based
on their changes occurs in their morphological and biochemical attributes such as
shoot length, toot length, fresh weight of shoot, fresh weight of root, number of
leaves, no of nodes, yield parameters, chlorophyll a, b, total chlorophyll, carotenoids,
prolin content, protein content, super oxide dismutase, uptake of metal. All these
attributes were studied after 40 days of sowing. The effect of metals on their
morphological, biochemical properties and significant variations were noticed among
the sampling days. Manganese treatment at all levels tested (except 50 and 100 mg
/kg) and iron treatment at all concentrations (except 100 and 200mg/kg) decreased the
various growth stages and yield parameters, biochemical constituents of mung bean
plants. However the 50 and 100 mg kg of manganese level and 100 and 200 mg/kg of
iron concentration in the soil showed a positive effect on the overall growth and dry
matter yield and biochemical constituents, metal uptake of mung bean plants. But the
proline content and antioxidant enzyme activity (super oxide dismutase) of mung
bean plants decreased at low levels (50 and 100 mg/ kg) in manganese, and (100 and
200 mg/kg) iron and increased at high levels (150-200 mg/kg) of manganese and (300
and 500 mg/kg) of iron in the soil.
Description
Keywords
null