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Differential Effects of Ammonium and Nitrate on Growth Performance of Glechoma longituba under Heterogeneous Cd Stress

Yanwei Feng1, Wen Lei2, Rui Gu3, Ping Zhao4, Shijun Ni1,*, Ningfei Lei3,*

1 College of Earth Sciences, Chengdu University of Technology, Chengdu, 610101, China
2 College of Landscape Architecture, Sichuan Agricultural University, Chengdu, 610101, China
3 College of Environment, Chengdu University of Technology, Chengdu, 610101, China
4 Geological Party 105, Guizhou Provincial Bureau of Geology and Mineral Exploration and Development, Guiyang, 550018, China

* Corresponding Authors: Shijun Ni. Email: email; Ningfei Lei. Email: email

Phyton-International Journal of Experimental Botany 2020, 89(3), 667-679. https://doi.org/10.32604/phyton.2020.010160

Abstract

Water, minerals, nutrients, etc., can be shared by physiological integration among inter-connected ramets of clonal plants. Nitrogen plays an important role in alleviating cadmium (Cd) stress for clonal plants. But how different forms of nitrogen affect growth performance of clonal plants subjected to heterogeneous Cd stress still remains poorly understood. A pot experiment was conducted to investigate the differential effects of ammonium and nitrate on growth performance of Glechoma longituba under heterogeneous Cd stress. In the experiment, parent ramets of Glechoma longituba clonal fragments were respectively supplied with modified Hoagland solution containing 7.5 mM ammonium, 7.5 mM nitrate or the same volume of nutrient solution without nitrogen. Cd solution with different concentrations (0, 0.1 or 2.0 mM) was applied to offspring ramets of the clonal fragments. Compared with control (N-free), nitrogen addition to parent ramets, especially ammonium, significantly improved antioxidant capacity [glutathione (GSH), proline (Pro), peroxidase (POD,) superoxide dismutase (SOD) and catalase (CAT)], PSII activity [maximum quantum yield of PSII (Fv/Fm) and effective quantum yield of PSII (ΦPSII)], chlorophyll content and biomass accumulation of the offspring ramets suffering from Cd stress. In addition, negative effects of nitrate on growth performance of whole clonal fragments were observed under Cd stress with high concentration (2.0 mM). Transportation or sharing of nitrogen, especially ammonium, can improve growth performance of clonal plants under heterogeneous Cd stress. The experiment provides insight into transmission mechanism of nitrogen among ramets of clonal plants suffering from heterogeneous nutrient supply. Physiological integration might be an important ecological strategy for clonal plants adapting to heterogeneous environment stress conditions.

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APA Style
Feng, Y., Lei, W., Gu, R., Zhao, P., Ni, S. et al. (2020). Differential effects of ammonium and nitrate on growth performance of glechoma longituba under heterogeneous cd stress. Phyton-International Journal of Experimental Botany, 89(3), 667-679. https://doi.org/10.32604/phyton.2020.010160
Vancouver Style
Feng Y, Lei W, Gu R, Zhao P, Ni S, Lei N. Differential effects of ammonium and nitrate on growth performance of glechoma longituba under heterogeneous cd stress. Phyton-Int J Exp Bot. 2020;89(3):667-679 https://doi.org/10.32604/phyton.2020.010160
IEEE Style
Y. Feng, W. Lei, R. Gu, P. Zhao, S. Ni, and N. Lei "Differential Effects of Ammonium and Nitrate on Growth Performance of Glechoma longituba under Heterogeneous Cd Stress," Phyton-Int. J. Exp. Bot., vol. 89, no. 3, pp. 667-679. 2020. https://doi.org/10.32604/phyton.2020.010160



cc Copyright © 2020 The Author(s). Published by Tech Science Press.
This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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