Silicon fertilization enhances the resistance of tobacco plants to combined Cd and Pb contamination : Physiological and microbial mechanisms
(2023) In Ecotoxicology and Environmental Safety 255.- Abstract
Remediation of soil contaminated with cadmium (Cd) and lead (Pb) is critical for tobacco production. Silicon (Si) fertilizer can relieve heavy metal stress and promote plant growth, however, it remains unknown whether fertilization with Si can mitigate the effects of Cd and Pb on tobacco growth and alter microbial community composition in polluted soils. Here we assessed the effect of two organic (OSiFA, OSiFB) and one mineral Si fertilizer (MSiF) on Cd and Pb accumulation in tobacco plants, together with responses in plant biomass, physiological parameters and soil bacterial communities in pot experiments. Results showed that Si fertilizer relieved Cd and Pb stress on tobacco, thereby promoting plant growth: Si fertilizer reduced... (More)
Remediation of soil contaminated with cadmium (Cd) and lead (Pb) is critical for tobacco production. Silicon (Si) fertilizer can relieve heavy metal stress and promote plant growth, however, it remains unknown whether fertilization with Si can mitigate the effects of Cd and Pb on tobacco growth and alter microbial community composition in polluted soils. Here we assessed the effect of two organic (OSiFA, OSiFB) and one mineral Si fertilizer (MSiF) on Cd and Pb accumulation in tobacco plants, together with responses in plant biomass, physiological parameters and soil bacterial communities in pot experiments. Results showed that Si fertilizer relieved Cd and Pb stress on tobacco, thereby promoting plant growth: Si fertilizer reduced available Cd and Pb in the soil by 37.3 % and 28.6 %, respectively, and decreased Cd and Pb contents in the plant tissue by 42.0–55.5 % and 17.2–25.6 %, resulting in increased plant biomass by 13.0–30.5 %. Fertilization with Si alleviated oxidative damage by decreasing malondialdehyde content and increasing peroxidase and ascorbate peroxidase content. In addition, Si fertilization increased photosynthesis, chlorophyll and carotenoid content. Microbial community structure was also affected by Si fertilization. Proteobacteria and Actinobacteria were the dominant phylum in the Cd and Pb contaminated soils, but Si fertilization reduced the abundance of Actinobacteria. Si fertilization also altered microbial metabolic pathways associated with heavy metal resistance. Together, our results suggest that both organic and mineral Si fertilizers can promote tobacco growth by relieving plant physiological stress and favoring a heavy metal tolerant soil microbial community.
(Less)
- author
- Wang, Bin ; Xiao, Liang ; Xu, Anchuan ; Mao, Wanchong ; Wu, Zhen ; Hicks, Lettice C. LU ; Jiang, Yonglei and Xu, Junju
- organization
- publishing date
- 2023
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Bacterial community composition, Cd and Pb contaminated soil, Heavy metal remediation, Plant growth, Si fertilization
- in
- Ecotoxicology and Environmental Safety
- volume
- 255
- article number
- 114816
- publisher
- Elsevier
- external identifiers
-
- scopus:85150760606
- pmid:36963187
- ISSN
- 0147-6513
- DOI
- 10.1016/j.ecoenv.2023.114816
- language
- English
- LU publication?
- yes
- id
- 51361d41-17d4-47cf-85e6-856dada2ec8e
- date added to LUP
- 2023-05-22 12:01:36
- date last changed
- 2024-12-14 22:59:18
@article{51361d41-17d4-47cf-85e6-856dada2ec8e,
abstract = {{<p>Remediation of soil contaminated with cadmium (Cd) and lead (Pb) is critical for tobacco production. Silicon (Si) fertilizer can relieve heavy metal stress and promote plant growth, however, it remains unknown whether fertilization with Si can mitigate the effects of Cd and Pb on tobacco growth and alter microbial community composition in polluted soils. Here we assessed the effect of two organic (OSiFA, OSiFB) and one mineral Si fertilizer (MSiF) on Cd and Pb accumulation in tobacco plants, together with responses in plant biomass, physiological parameters and soil bacterial communities in pot experiments. Results showed that Si fertilizer relieved Cd and Pb stress on tobacco, thereby promoting plant growth: Si fertilizer reduced available Cd and Pb in the soil by 37.3 % and 28.6 %, respectively, and decreased Cd and Pb contents in the plant tissue by 42.0–55.5 % and 17.2–25.6 %, resulting in increased plant biomass by 13.0–30.5 %. Fertilization with Si alleviated oxidative damage by decreasing malondialdehyde content and increasing peroxidase and ascorbate peroxidase content. In addition, Si fertilization increased photosynthesis, chlorophyll and carotenoid content. Microbial community structure was also affected by Si fertilization. Proteobacteria and Actinobacteria were the dominant phylum in the Cd and Pb contaminated soils, but Si fertilization reduced the abundance of Actinobacteria. Si fertilization also altered microbial metabolic pathways associated with heavy metal resistance. Together, our results suggest that both organic and mineral Si fertilizers can promote tobacco growth by relieving plant physiological stress and favoring a heavy metal tolerant soil microbial community.</p>}},
author = {{Wang, Bin and Xiao, Liang and Xu, Anchuan and Mao, Wanchong and Wu, Zhen and Hicks, Lettice C. and Jiang, Yonglei and Xu, Junju}},
issn = {{0147-6513}},
keywords = {{Bacterial community composition; Cd and Pb contaminated soil; Heavy metal remediation; Plant growth; Si fertilization}},
language = {{eng}},
publisher = {{Elsevier}},
series = {{Ecotoxicology and Environmental Safety}},
title = {{Silicon fertilization enhances the resistance of tobacco plants to combined Cd and Pb contamination : Physiological and microbial mechanisms}},
url = {{http://dx.doi.org/10.1016/j.ecoenv.2023.114816}},
doi = {{10.1016/j.ecoenv.2023.114816}},
volume = {{255}},
year = {{2023}},
}