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| Effects of plant growth-promoting bacteria containing ACC deaminase on cadmium tolerance and cadmium enrichment in lotus |
| Received:August 18, 2022 Revised:December 23, 2022 |
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| KeyWord:PGPB;ACC deaminase;cadmium stress;lotus;promoting effect;bioconcentration |
| Author Name | Affiliation | E-mail | | JIANG Ting | College of Horticulture, Nanjing Agricultural University/Key Laboratory of Landscape Agriculture, Ministry of Agriculture and Rural Affairs/Key Laboratory of Flower Biology in East China, State Forestry and Grassland Administration/Key Laboratory of Flower Biology and Germplasm Creation, Ministry of Agriculture and Rural Affairs, Nanjing 210095, China | | | LI Zexin | College of Horticulture, Nanjing Agricultural University/Key Laboratory of Landscape Agriculture, Ministry of Agriculture and Rural Affairs/Key Laboratory of Flower Biology in East China, State Forestry and Grassland Administration/Key Laboratory of Flower Biology and Germplasm Creation, Ministry of Agriculture and Rural Affairs, Nanjing 210095, China | | | HU Tu | College of Horticulture, Nanjing Agricultural University/Key Laboratory of Landscape Agriculture, Ministry of Agriculture and Rural Affairs/Key Laboratory of Flower Biology in East China, State Forestry and Grassland Administration/Key Laboratory of Flower Biology and Germplasm Creation, Ministry of Agriculture and Rural Affairs, Nanjing 210095, China | | | XU Yingchun | College of Horticulture, Nanjing Agricultural University/Key Laboratory of Landscape Agriculture, Ministry of Agriculture and Rural Affairs/Key Laboratory of Flower Biology in East China, State Forestry and Grassland Administration/Key Laboratory of Flower Biology and Germplasm Creation, Ministry of Agriculture and Rural Affairs, Nanjing 210095, China | | | JIN Qijiang | College of Horticulture, Nanjing Agricultural University/Key Laboratory of Landscape Agriculture, Ministry of Agriculture and Rural Affairs/Key Laboratory of Flower Biology in East China, State Forestry and Grassland Administration/Key Laboratory of Flower Biology and Germplasm Creation, Ministry of Agriculture and Rural Affairs, Nanjing 210095, China | | | WANG Yanjie | College of Horticulture, Nanjing Agricultural University/Key Laboratory of Landscape Agriculture, Ministry of Agriculture and Rural Affairs/Key Laboratory of Flower Biology in East China, State Forestry and Grassland Administration/Key Laboratory of Flower Biology and Germplasm Creation, Ministry of Agriculture and Rural Affairs, Nanjing 210095, China | zjjwyj@njau.edu.cn |
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| Abstract: |
| To investigate the effects of plant growth-promoting bacteria（PGPB）containing ACC deaminase on improving Cd tolerance and remediation efficiency in lotus, a pot experiment was conducted to analyze the influence of Pantoea vagans So23 and Pseudomonas veronii E02 inoculation on the growth, physiological metabolism, and Cd absorption and accumulation capacity of the ornamental lotus variety ‘Molingqiuse'under Cd stress. The results showed that, compared with the Cd treatment alone, inoculation of So23 and E02 effectively alleviated the inhibition of lotus growth under Cd stress, and led to an increase in plant height, leaf area, and total number of vertical leaves. MDA content in leaves was decreased by 38.39% and 31.21%, respectively, under Cd stress combined with So23 and E02 inoculation, but the ascorbic acid was increased by 54.85% and 36.64%, respectively, after the supplementation. The two strains significantly changed the distribution pattern of Cd in different lotus organs, and could resist Cd stress by limiting Cd-transport from underground organs to leaves. Additionally, the strain So23 markedly enhanced the Cd enrichment in lotus, and the Cd content in the sediment environment was decreased by 56.47%, and improved the sediment environment. The research shows that supplementation with So23 and E02 can, to some extent, improve Cd-stress tolerance in lotus by increasing antioxidant content and changing its Cd translocation and enrichment capacity. |
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