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231226s2023 xx |||||o 00| ||eng c |
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|a 10.1016/j.plaphy.2023.01.021
|2 doi
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|a pubmed25n1171.xml
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|a (DE-627)NLM351528512
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|a (NLM)36641944
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|a (PII)S0981-9428(23)00025-6
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Pan, Taowen
|e verfasserin
|4 aut
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|a Silicon-mediated regulation of cadmium transport and activation of antioxidant defense system enhances Pennisetum glaucum resistance to cadmium stress
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|c 2023
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 31.01.2023
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|a Date Revised 02.02.2023
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Copyright © 2023 Elsevier Masson SAS. All rights reserved.
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|a Pennisetum glaucum is an important forage grass for livestock. However, the large accumulation of cadmium (Cd) in plant tissues increases the risk of heavy metals entering the food chain in Cd-contaminated soils. Silicon (Si) can inhibit cadmium (Cd) uptake and enhance tolerance of plant to Cd toxicity, but whether and how Si alleviates Cd toxicity in grass and the underlying mechanisms are unclear. The present study explored the differential mechanisms of silicon-induced Cd transport in apoplast and symplast, Cd distribution in root tissue and antioxidant defense system in P. glaucum under Cd stress through hydroponic and pot experiments. The present results showed that exogenous Si supply significantly reduced Cd concentrations in apoplast and symplast; Si treatment increased monosilicic acid concentration in apoplast and symplast of the roots and shoots under Cd stress. Elemental analysis of root microdomains showed that Si treatment increased the distribution of Cd and Si in the endodermis by 42.6% and 14.0%, respectively. Si alleviated the adverse influences of Cd on plant growth, which were manifested in root morphological traits and root activity. In addition, Si addition significantly increased the activities of catalase and superoxide dismutase by 37.0% and 72.7%, and improved the efficiency of the ascorbate-glutathione cycle in Cd-stress shoots. Furthermore, Si significantly reduced the contents of hydrogen peroxide and superoxide anion in Cd-stressed shoots by 16.6% and 48.7%, respectively. These findings demonstrate that Si enhances the resistance of P. glaucum to Cd stress through regulating Cd transport pathways and activating antioxidant defense systems
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|a Journal Article
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|a Antioxidant defense system
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|a Cadmium
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|a P. glaucum
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|a Silicon
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|a Transport
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|a Antioxidants
|2 NLM
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|a Silicon
|2 NLM
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| 650 |
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|a Z4152N8IUI
|2 NLM
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| 650 |
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|a Cadmium
|2 NLM
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| 650 |
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|a 00BH33GNGH
|2 NLM
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| 650 |
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|a Superoxide Dismutase
|2 NLM
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| 650 |
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|a EC 1.15.1.1
|2 NLM
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| 650 |
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|a Soil Pollutants
|2 NLM
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| 700 |
1 |
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|a Dong, Qiyu
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Cai, Yixia
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Cai, Kunzheng
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Plant physiology and biochemistry : PPB
|d 1991
|g 195(2023) vom: 08. Feb., Seite 206-213
|w (DE-627)NLM098178261
|x 1873-2690
|7 nnas
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| 773 |
1 |
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|g volume:195
|g year:2023
|g day:08
|g month:02
|g pages:206-213
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|u http://dx.doi.org/10.1016/j.plaphy.2023.01.021
|3 Volltext
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|d 195
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