Photosynthetica, 2018 (vol. 56), issue 4

Photosynthetica 2018, 56(4):1147-1153 | DOI: 10.1007/s11099-018-0800-1

The effects of lead on photosynthetic performance of waxberry seedlings (Myrica rubra)

B. He1,*, M. Gu1, X. Wang1, X. He2,*
1 Guangxi Key Laboratory of Agri-environment and Agri-products Safety, College of Agriculture, Guangxi University, Nanning, Guangxi, China
2 College of Agriculture, Guangxi University, Nanning, Guangxi, China

The photosynthesis was investigated 30 d after Pb treatment in Myrica rubra seedlings. The Pb treatment resulted in significantly increased Pb concentrations in shoots. Low Pb concentration exposure (≤2 mM) reduced the net photosynthetic rate (PN), transpiration rate (E), and stomatal conductance (gs) without affecting the intercellular CO2 concentration (Ci), chlorophyll (Chl) content, and Chl fluorescence parameters. At 10 d after severe Pb treatment (≥4 mM), PN was inhibited and accompanied by Chl damage, while at 30 d, the inhibition of PN was followed by an increase of Ci and a decrease of gs, E, Chl content, and Chl fluorescence parameters. M. rubra showed a promising prospect for use in the soil phytoremediation, when Pb concentration is low, but the remediation efficiency of M. rubra is limited if Pb exceeds 2 mM.

Keywords: chlorophyll fluorescence; lead stress; photosynthesis

Received: October 22, 2016; Accepted: July 17, 2017; Prepublished online: December 1, 2018; Published: November 1, 2018Show citation

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He, B., Gu, M., Wang, X., & He, X. (2018). The effects of lead on photosynthetic performance of waxberry seedlings (Myrica rubra). Photosynthetica, 56(4), 1147-1153. doi: 10.1007/s11099-018-0800-1.
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