Photosynthetica 2008, 46(4):627-630 | DOI: 10.1007/s11099-008-0107-8

Photosynthetic and anatomic responses of peanut leaves to cadmium stress

G. R. Shi1,2, Q. S. Cai1,*
1 College of Life Science, Nanjing Agricultural University, Nanjing, China
2 The Anhui Provincial Key Laboratory of the Resource Plant Biology in Department of Biology, Huaibei Coal Industry Teachers College, Huaibei, China

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.

Additional key words: anatomic traits; Arachis hypogaea; carotenoids; chlorophyll fluorescence; intercellular CO2 concentration; leaf structure; palisade and spongy mesophyll; stomata dimensions; stomatal conductance; transpiration rate

Received: February 20, 2008; Accepted: July 27, 2008; Published: December 1, 2008  Show citation

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Shi, G.R., & Cai, Q.S. (2008). Photosynthetic and anatomic responses of peanut leaves to cadmium stress. Photosynthetica, 46(4), 627-630. doi: 10.1007/s11099-008-0107-8
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