2016, Issue 7, Volume 8

RESPONSE OF BRASSICA CAMPESTRIS L. CV. VARUNA TO SIMULATEDACID RAIN

Rajesh Kumar*

Department of Botany, Meerut College, Meerut 250001 (U.P.) India

Email : rajeshmalik.mcm@gmail.com

Received-02.07.2016, Revised-26.07.2016

Abstract: The effects of simulated acid rain (pH 4, 0) have been studied on Brassica campestris L. cv. varuna. The plant growth in terms of shoot and root length, number of leaves per plant and number of lateral branches, was reduced significantly in HNO3, H2SO4 and HNO3 + H2SO4 simulated acid rain. Reduction in dry weight and net primary productivity were also observed and the effects were found to be age dependent. Flowering was delayed by simulated acid rain. There was also a significant reduction in yield. The effect of HNO3 simulated acid rain was greater than H2SO4 simulated acid rain and HNO3 + H2SO4 simulated acid rain caused maximum reduction in plant growth and yield. A reduction in chlorophyll a, chlorophyll b, and total chlorophyll contents of leaves was also observed after 10 days of treatment. The loss in chlorophyll a was higher than chlorophyll b. A significant increase was observed in nitrogen content on application of HNO3 simulated acid rain and sulphur content in H2SO4 simulated acid rain. The plants subjected to simulated acid rain did not show any visible foliar injury symptoms up to 35 days but subsequently these symptoms appeared.

Keywords: Brassica campestris, Acid rain, Plant, Shoot, Root

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