Informatics Publishing Limited

J. S. Guleria ¹, Rashmi Srivastava ¹, A. C. Nanda ², R. K. Sehgal ²

Affiliations
1 Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow - 226 007, IN
2 Wadia Institute of Himalayan Geology, 33, General Mahadeo Singh Road, Dehra Dun - 248 001, IN

Abstract

The paper reports the occurrence of a fossil wood of Terminalia for the first time from the Lower Siwalik Subgroup of Panchkula, Haryana along with a fossil Dipterocarpus wood from further east in the Middle Siwalik Subgroup, exposed south of Dehra Dun, Uttaranchal. These woods indicate the prevalence of moist conditions and existence of tropical lowland vegetation in the western part of Himalayan Foot-Hills till the Middle Siwalik.

Keywords

Fossil Woods, Xylotomy, Lower Siwalik (Middl Meiocene), Middle Siwalik, (Upper Miocene), Palaeoclimate, Phytogeography, Haryana, Uttaranchal.

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Anurag Dabas ¹, N. S. Nagpure ¹, R. M. Mishra ², Ravindra Kumar ¹, Basdeo Kushwaha ¹, Rashmi Srivastava ¹

Affiliations
1 Molecular Biology and Biotechnology Division, National Bureau of Fish Genetic Resources, Canal Ring Road, P.O. Dilkusha, Lucknow–226 002 (UP), IN
2 Department of Environmental Biology Awadhesh Pratap Singh University, Rewa, Madhya Pradesh, IN

Abstract

The present study investigated the effects of cadmium chloride on the activities of antioxidant enzymes, viz. superoxide dismutase (SOD) and catalase (CAT), in liver and kidney tissues of cyprinid fish, Labeo rohita. The test specimens were exposed to three concentrations of cadmium chloride namely, 33.55, 67.09 and 100.64 mg L-1, for 96 h duration. A significant elevation in SOD activity and reduction in CAT activity was observed in a dose- and time-dependent manner in both the tissues. The results suggest the essential role of SOD and CAT in antioxidant defense system for protecting fish species from oxidative stress; hence, it can be considered as a sensitive biomarker of the antioxidant defense system.

Keywords

Antioxidant Enzymes, Cadmium, Labeo rohita, Oxidative Stress.

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