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Lanthanum improves salt tolerance of maize seedlings

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  • Published:
Photosynthetica

Abstract

In this study, the effects of lanthanum were investigated on contents of pigments, chlorophyll (Chl) fluorescence, antioxidative enzymes, and biomass of maize seedlings under salt stress. The results showed that salt stress significantly decreased the contents of Chl and carotenoids, maximum photochemical efficiency of PSII (Fv/Fm), photochemical quenching (qP), and quantum efficiency of PSII photochemistry (ΦPSII), net photosynthetic rate (P N), and biomass. Salt stress increased nonphotochemical quenching (qN), the activities of ascorbate peroxidase, catalase, superoxide dismutase, glutathione peroxidase, and the contents of malondialdehyde and hydrogen peroxide compared with control. Pretreatment with lanthanum prior to salt stress significantly enhanced the contents of Chl and carotenoids, Fv/Fm, qP, qN, ΦPSII, P N, biomass, and activities of the above antioxidant enzymes compared with the salt-stressed plants. Pretreatment with lanthanum also significantly reduced the contents of malondialdehyde and hydrogen peroxide induced by salt stress. Our results suggested that lanthanum can improve salt tolerance of maize seedlings by enhancing the function of photosynthetic apparatus and antioxidant capacity.

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Abbreviations

APX:

ascorbate peroxidase

Car:

carotenoids

CAT:

catalase

Chl:

chlorophyll

Fv/Fm :

maximum photochemical efficiency of PSII

GPX:

glutathione peroxidase

JA:

jasmonic acid

MDA:

malondialdehyde

P N :

net photosynthetic rate

ΦPSII :

effective quantum yield of PSII

qN :

nonphotochemical quenching

qP :

photochemical quenching

ROS:

reactive oxygen species

SOD:

superoxide dismutase

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Authors and Affiliations

  1. Henan Institute of Science and Technology, Xinxiang, 453003, Henan Province, China

    R. Q. Liu, X. J. Xu & C. J. Shan

  2. Collaborative Innovation Center of Modern Biological Breeding, Henan Province, Xinxiang, 453003, Henan Province, China

    X. J. Xu & C. J. Shan

  3. Shangluo University, Shangluo, 726000, Shaanxi Province, China

    S. Wang

Authors
  1. R. Q. Liu
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  2. X. J. Xu
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  3. S. Wang
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  4. C. J. Shan
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Corresponding author

Correspondence to C. J. Shan.

Additional information

Acknowledgements: This study was funded by the “Important Scientific Research Project of Henan Institute of Science and Technology (2011010)”.

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Liu, R.Q., Xu, X.J., Wang, S. et al. Lanthanum improves salt tolerance of maize seedlings. Photosynthetica 54, 148–151 (2016). https://doi.org/10.1007/s11099-015-0157-7

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  • DOI: https://doi.org/10.1007/s11099-015-0157-7

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