Cadmium-Induced Changes in Leaf Epidermes, Photosynthetic Rate and Pigment Concentrations in Cajanus Cajan (original) (raw)

Biologia plantarum 44:59-64, 2001 | DOI: 10.1023/A:1017918320697

1Department of Botany, Jamia Hamdard, Hamdard Nagar, New Delhi-, India

Application of different concentrations of cadmium [5, 10, 15, 25 and 50 μg(CdCl2) g-1(soil d.m.)] markedly affected leaves of Cajanus cajan (Linn.) Huth. Due to increased Cd content in leaves, stomatal density and size on abaxial epidermis, and the size of stomatal aperture and length and density of trichomes on both leaf epidermes decreased significantly in the treated plants. Net photosynthetic rate and stomatal conductance were reduced significantly at each concentration of cadmium, whereas reduction in intercellular carbon dioxide concentration was significant at 10 μg Cd onwards. The contents of chlorophyll a, chlorophyll b and carotenoids were relatively low during early stages of plant development under the effect of Cd. Nitrate content, nitrate reductase activity and protein content were also lower in treated plants, compared with control.

Keywords: carotenoids; chlorophyll; nitrate reductase activity; proteins; stomatal conductance; stomatal density
Subjects: cadmium, photosynthesis; carotenoids, heavy metals; chlorophylls, heavy metal accumulation in roots and shoots; epidermis, cadmium; gas exchange, chloroplast pigments, cadmium; heavy metals, photosynthesis; nitrate supply, photosynthesis; stomatal conductance, photosynthesis, chloroplast pigments, cadmium

Published: March 1, 2001 Show citation

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