Photosynthetic and anatomic responses of peanut leaves to cadmium stress |
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Authors: | G R Shi Q S Cai |
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Institution: | (1) Physical and Materials Chemistry Division, National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, Maharashtra, 411 008, India;(2) Plant Tissue Culture Division, National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, Maharashtra, 411 008, India; |
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Abstract: | Cadmium (Cd) treatments caused an inhibition in the net photosynthetic rate (P
N) of peanut (Arachis hypogaea) plants, due to the reduction of stomatal conductance (g
s) and photosynthetic pigment contents, as well as the alteration in leaf structure. The decrease of the transpiration rate
and g
s might result from the Cd-induced xerophyte anatomic features of leaves (i.e. thick lamina, upper epidermis, palisade mesophyll, high palisade to spongy thickness ratio, as well as abundant and small
stomata). The decline of P
N was independent of the impairment in photosystem 2. |
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Keywords: | |
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