Physiological and metabolomics responses of Hydrangea macrophylla (Thunb.) Ser. and Hydrangea strigosa Rehd. to lead exposure
Hydrangea is a potential remediation plant for lead (Pb) pollution. Plant roots communicate with soil through the release of root exudates. It is crucial to study rhizoremediation mechanisms to understand the response of root exudates to contamination stress. Here, we investigated the physiological...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-09-01
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| Series: | Ecotoxicology and Environmental Safety |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0147651322008004 |
| _version_ | 1798032310125199360 |
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| author | Jing Jin Ziyi Song Bing Zhao Yuyu Zhang Ruirui Wang |
| author_facet | Jing Jin Ziyi Song Bing Zhao Yuyu Zhang Ruirui Wang |
| author_sort | Jing Jin |
| collection | DOAJ |
| description | Hydrangea is a potential remediation plant for lead (Pb) pollution. Plant roots communicate with soil through the release of root exudates. It is crucial to study rhizoremediation mechanisms to understand the response of root exudates to contamination stress. Here, we investigated the physiological responses and metabolomic profiling of two Hydrangea species, a horticultural cultivar (Hydrangea macrophylla (Thunb.) Ser.) and a wild type (Hydrangea strigosa Rehd.), under Pb-free and Pb-stressed conditions for 50 days. The results showed that Pb treatment adversely affected the biomass and root growth of the two species. H. strigosa was a Pb-tolerant species with higher superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) activities and more ascorbic acid (AsA) content in roots. Metabolomic profiling showed that 181 and 169 compounds were identified in H. macrophylla and H. strigosa root exudates, respectively, among which 18 showed significant differences between H. macrophylla and H. strigosa under Pb exposure. H. strigosa showed significantly (P < 0.05) higher secretion of sucrose, glycolic acid, and nonanoic acid than H. macrophylla after Pb treatment. Pb stress promoted fatty acid metabolism in H. strigosa, suppressed amino acid metabolism in H. macrophylla, and promoted a higher carbohydrate metabolism in H. strigosa compared with H. macrophylla. This study provides a possible mechanism for the high Pb absorption potential of Hydrangea. |
| first_indexed | 2024-04-11T20:10:43Z |
| format | Article |
| id | doaj.art-ac2d03714db74697a7a1ddd8d1c00ed9 |
| institution | Directory Open Access Journal |
| issn | 0147-6513 |
| language | English |
| last_indexed | 2024-04-11T20:10:43Z |
| publishDate | 2022-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecotoxicology and Environmental Safety |
| spelling | doaj.art-ac2d03714db74697a7a1ddd8d1c00ed92022-12-22T04:05:06ZengElsevierEcotoxicology and Environmental Safety0147-65132022-09-01243113960Physiological and metabolomics responses of Hydrangea macrophylla (Thunb.) Ser. and Hydrangea strigosa Rehd. to lead exposureJing Jin0Ziyi Song1Bing Zhao2Yuyu Zhang3Ruirui Wang4The College of Landscape Architecture and Arts, Northwest A&F University, Yangling 712100, ChinaThe College of Landscape Architecture and Arts, Northwest A&F University, Yangling 712100, ChinaCorresponding author.; The College of Landscape Architecture and Arts, Northwest A&F University, Yangling 712100, ChinaThe College of Landscape Architecture and Arts, Northwest A&F University, Yangling 712100, ChinaThe College of Landscape Architecture and Arts, Northwest A&F University, Yangling 712100, ChinaHydrangea is a potential remediation plant for lead (Pb) pollution. Plant roots communicate with soil through the release of root exudates. It is crucial to study rhizoremediation mechanisms to understand the response of root exudates to contamination stress. Here, we investigated the physiological responses and metabolomic profiling of two Hydrangea species, a horticultural cultivar (Hydrangea macrophylla (Thunb.) Ser.) and a wild type (Hydrangea strigosa Rehd.), under Pb-free and Pb-stressed conditions for 50 days. The results showed that Pb treatment adversely affected the biomass and root growth of the two species. H. strigosa was a Pb-tolerant species with higher superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) activities and more ascorbic acid (AsA) content in roots. Metabolomic profiling showed that 181 and 169 compounds were identified in H. macrophylla and H. strigosa root exudates, respectively, among which 18 showed significant differences between H. macrophylla and H. strigosa under Pb exposure. H. strigosa showed significantly (P < 0.05) higher secretion of sucrose, glycolic acid, and nonanoic acid than H. macrophylla after Pb treatment. Pb stress promoted fatty acid metabolism in H. strigosa, suppressed amino acid metabolism in H. macrophylla, and promoted a higher carbohydrate metabolism in H. strigosa compared with H. macrophylla. This study provides a possible mechanism for the high Pb absorption potential of Hydrangea.http://www.sciencedirect.com/science/article/pii/S0147651322008004Ornamental plants for phytoremediationWild HydrangeaRoot exudatesDifferential metabolitesGC-MSTolerance mechanism |
| spellingShingle | Jing Jin Ziyi Song Bing Zhao Yuyu Zhang Ruirui Wang Physiological and metabolomics responses of Hydrangea macrophylla (Thunb.) Ser. and Hydrangea strigosa Rehd. to lead exposure Ecotoxicology and Environmental Safety Ornamental plants for phytoremediation Wild Hydrangea Root exudates Differential metabolites GC-MS Tolerance mechanism |
| title | Physiological and metabolomics responses of Hydrangea macrophylla (Thunb.) Ser. and Hydrangea strigosa Rehd. to lead exposure |
| title_full | Physiological and metabolomics responses of Hydrangea macrophylla (Thunb.) Ser. and Hydrangea strigosa Rehd. to lead exposure |
| title_fullStr | Physiological and metabolomics responses of Hydrangea macrophylla (Thunb.) Ser. and Hydrangea strigosa Rehd. to lead exposure |
| title_full_unstemmed | Physiological and metabolomics responses of Hydrangea macrophylla (Thunb.) Ser. and Hydrangea strigosa Rehd. to lead exposure |
| title_short | Physiological and metabolomics responses of Hydrangea macrophylla (Thunb.) Ser. and Hydrangea strigosa Rehd. to lead exposure |
| title_sort | physiological and metabolomics responses of hydrangea macrophylla thunb ser and hydrangea strigosa rehd to lead exposure |
| topic | Ornamental plants for phytoremediation Wild Hydrangea Root exudates Differential metabolites GC-MS Tolerance mechanism |
| url | http://www.sciencedirect.com/science/article/pii/S0147651322008004 |
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