Acclimatization of photosynthetic apparatus and antioxidant metabolism to excess soil cadmium in Buddleja spp.

Abstract Heavy metal (HM) pollutants can cause serious phytotoxicity or oxidative stress in plants. Buddleja L., commonly known as “butterfly bushes”, are frequently found growing on HM-contaminated land. However, to date, few studies have focused on the physiological and biochemical responses of Bu...

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Autores principales:	Weichang Gong, Bruce L. Dunn, Yaqing Chen, Yunmei Shen
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/acfd359e0f7847ea9fa02cedec2ea7b4
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spelling	oai:doaj.org-article:acfd359e0f7847ea9fa02cedec2ea7b42021-12-02T11:43:44ZAcclimatization of photosynthetic apparatus and antioxidant metabolism to excess soil cadmium in Buddleja spp.10.1038/s41598-020-78593-82045-2322https://doaj.org/article/acfd359e0f7847ea9fa02cedec2ea7b42020-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-78593-8https://doaj.org/toc/2045-2322Abstract Heavy metal (HM) pollutants can cause serious phytotoxicity or oxidative stress in plants. Buddleja L., commonly known as “butterfly bushes”, are frequently found growing on HM-contaminated land. However, to date, few studies have focused on the physiological and biochemical responses of Buddleja species to HM stress. In this study, potted seedlings of B. asiatica Lour. and B. macrostachya Wall. ex Benth. were subjected to various cadmium (Cd) concentrations (0, 25, 50, 100, and 200 mg kg−1) for 90 days. Both studied Buddleja species showed restricted Cd translocation capacity. Exposure to Cd, non-significant differences (p > 0.05) were observed, including quantum yield of photosystem II (PSII), effective quantum yield of PSII, photochemical quenching and non-photochemical quenching in both species between all studied Cd concentrations. Moreover, levels of cellular reactive oxygen species (ROS) significantly declined (p < 0.05) with low malondialdehyde concentrations. In B. asiatica, high superoxide dismutase and significantly enhanced (p < 0.05) peroxidase (POD) activity contributed greatly to the detoxification of excess ROS, while markedly enhanced POD activity was observed in B. macrostachya. Additionally, B. macrostachya showed higher membership function values than did B. asiatica. These results suggested that both Buddleja species exhibited high Cd resistance and acclimatization.Weichang GongBruce L. DunnYaqing ChenYunmei ShenNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-10 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Weichang Gong Bruce L. Dunn Yaqing Chen Yunmei Shen Acclimatization of photosynthetic apparatus and antioxidant metabolism to excess soil cadmium in Buddleja spp.
description	Abstract Heavy metal (HM) pollutants can cause serious phytotoxicity or oxidative stress in plants. Buddleja L., commonly known as “butterfly bushes”, are frequently found growing on HM-contaminated land. However, to date, few studies have focused on the physiological and biochemical responses of Buddleja species to HM stress. In this study, potted seedlings of B. asiatica Lour. and B. macrostachya Wall. ex Benth. were subjected to various cadmium (Cd) concentrations (0, 25, 50, 100, and 200 mg kg−1) for 90 days. Both studied Buddleja species showed restricted Cd translocation capacity. Exposure to Cd, non-significant differences (p > 0.05) were observed, including quantum yield of photosystem II (PSII), effective quantum yield of PSII, photochemical quenching and non-photochemical quenching in both species between all studied Cd concentrations. Moreover, levels of cellular reactive oxygen species (ROS) significantly declined (p < 0.05) with low malondialdehyde concentrations. In B. asiatica, high superoxide dismutase and significantly enhanced (p < 0.05) peroxidase (POD) activity contributed greatly to the detoxification of excess ROS, while markedly enhanced POD activity was observed in B. macrostachya. Additionally, B. macrostachya showed higher membership function values than did B. asiatica. These results suggested that both Buddleja species exhibited high Cd resistance and acclimatization.
format	article
author	Weichang Gong Bruce L. Dunn Yaqing Chen Yunmei Shen
author_facet	Weichang Gong Bruce L. Dunn Yaqing Chen Yunmei Shen
author_sort	Weichang Gong
title	Acclimatization of photosynthetic apparatus and antioxidant metabolism to excess soil cadmium in Buddleja spp.
title_short	Acclimatization of photosynthetic apparatus and antioxidant metabolism to excess soil cadmium in Buddleja spp.
title_full	Acclimatization of photosynthetic apparatus and antioxidant metabolism to excess soil cadmium in Buddleja spp.
title_fullStr	Acclimatization of photosynthetic apparatus and antioxidant metabolism to excess soil cadmium in Buddleja spp.
title_full_unstemmed	Acclimatization of photosynthetic apparatus and antioxidant metabolism to excess soil cadmium in Buddleja spp.
title_sort	acclimatization of photosynthetic apparatus and antioxidant metabolism to excess soil cadmium in buddleja spp.
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/acfd359e0f7847ea9fa02cedec2ea7b4
work_keys_str_mv	AT weichanggong acclimatizationofphotosyntheticapparatusandantioxidantmetabolismtoexcesssoilcadmiuminbuddlejaspp AT bruceldunn acclimatizationofphotosyntheticapparatusandantioxidantmetabolismtoexcesssoilcadmiuminbuddlejaspp AT yaqingchen acclimatizationofphotosyntheticapparatusandantioxidantmetabolismtoexcesssoilcadmiuminbuddlejaspp AT yunmeishen acclimatizationofphotosyntheticapparatusandantioxidantmetabolismtoexcesssoilcadmiuminbuddlejaspp
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Acclimatization of photosynthetic apparatus and antioxidant metabolism to excess soil cadmium in Buddleja spp.

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