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Li D, Miao L, Cisse EHM, Li L, Chen B, Yang F. Dissecting the below- and aboveground specific responses of two waterlogging-tolerant arbor species to nutrient supply under waterlogging conditions. Tree Physiol 2023; 43:390-403. [PMID: 36300499 DOI: 10.1093/treephys/tpac127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 09/27/2022] [Accepted: 10/14/2022] [Indexed: 05/03/2023]
Abstract
Although environmental factors affecting adventitious root (AR) formation have been examined, how nutrient status affects ARs under waterlogging conditions remains unclear. In this study, plants' performance in responding to AR regulation based on nutrient supply was investigated in terms of plant morphology, physiology and AR traits. Results indicated that Cleistocalyx operculatus possesses higher waterlogging tolerance than Syzygium cumini according to the waterlogging tolerance coefficient, mainly because of the higher fresh weight, porosity and length of AR in C. operculatus. Nutrient supply treatment under a waterlogging condition significantly decreased the fresh weight, length, number, porosity, cortex area of AR and the ratio of cortex-to-stele area in both species relative to those in the waterlogging treatment, but significantly increased the activities and stele areas of AR, and leaf nutrient content. This result showed that nutrient supply caused variations in the morphological and anatomical structures of AR that were more beneficial to improve nutrient transportation than oxygen absorption under waterlogging conditions, supporting the nutrient-priority hypothesis. Moreover, nutrient supply under waterlogging conditions induced greater increase in stele area of ARs, fresh weight of the whole plant, total leaf area, leaf nitrogen level, total chlorophyll content, net photosynthesis rate and maximum photochemical quantum yield of PSII in S. cumini than in C. operculatus, suggesting that S. cumini can transport more nutrients and easily adapts to increase in nutrient supply under waterlogging conditions. Thus, S. cumini have better performance in extracting and utilizing nutrients in the water for plant growth. The findings showed that terrestrial arbor plants have physiological and microstructural mechanisms that respond to nutrient supply under waterlogging conditions and provide novel insights into the phytoremediation of eutrophic water bodies in wetland systems.
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Affiliation(s)
- Dadong Li
- School of Ecological and Environmental Sciences, Hainan University, No. 58 Renmin Road, Meilan District, Haikou 570228, China
- School of Life Sciences, Hainan University, No. 58 Renmin Road, Meilan District, Haikou 570228, China
| | - Lingfeng Miao
- School of Plant Protection, Hainan University, No. 58 Renmin Road, Meilan District, Haikou 570228, China
| | - El-Hadji Malick Cisse
- School of Ecological and Environmental Sciences, Hainan University, No. 58 Renmin Road, Meilan District, Haikou 570228, China
- School of Life Sciences, Hainan University, No. 58 Renmin Road, Meilan District, Haikou 570228, China
| | - Lijun Li
- School of Ecological and Environmental Sciences, Hainan University, No. 58 Renmin Road, Meilan District, Haikou 570228, China
| | - Boshen Chen
- School of Ecological and Environmental Sciences, Hainan University, No. 58 Renmin Road, Meilan District, Haikou 570228, China
| | - Fan Yang
- School of Ecological and Environmental Sciences, Hainan University, No. 58 Renmin Road, Meilan District, Haikou 570228, China
- Center for Eco-Environmental Restoration Engineering of Hainan Province, No. 58 Renmin Road, Meilan District, Haikou 570228, China
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