Coordination of photosynthetic performance and leaf N:P stoichiometry under fluctuating coastal environmental conditions in Bolboschoenoplectus mariqueter
- 1Shaoxing Municipal Natural Resources Protection and Management Center, Shaoxing, Zhejiang, China
- 2Shaoxing Municipal Urban and Rural Planning Management Center, Shaoxing, Zhejiang, China
- 3State Key Laboratory of Wetland Conservation and Restoration, Wetland Ecosystem Research Station of Hangzhou Bay, Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, China
Abstract
Introduction: The population of Bolboschoenoplectus mariqueter has substantially declined because of habitat modification and competition. Therefore, this study aimed to characterize the photosynthetic and stoichiometric traits of B. mariqueter and their environmental regulation in a natural tidal-flat population to facilitate successful conservation.
Methods: Light- and CO2-response characteristics, diurnal and seasonal dynamics of leaf gas exchange, daily carbon assimilation and transpiration, chlorophyll characteristics, and leaf nitrogen (N) and phosphorus (P) stoichiometry in a natural were investigated in a × B. mariqueter population in Hangzhou Bay, China. Random forest, variation partitioning, and redundancy analyses were used to evaluate the relationships among photosynthetic performance, leaf nutrient stoichiometry, and microenvironmental factors.
Results: The net photosynthetic rate (Pn), transpiration rate (Tr), and water-use efficiency (WUE) varied substantially among months. Pn and Tr showed generally coordinated diurnal dynamics, whereas daily carbon assimilation and transpiration followed partially divergent seasonal trajectories after July. Leaf N and P concentrations and N:P ratios exhibited pronounced and asynchronous seasonal variations. The random forest model explained 65%, 69%, and 42% of the variations in Pn, Tr, and WUE, respectively. Leaf P and N:P were the main predictors of Pn; N, P, and N:P, of Tr; and N and P, of WUE. Variation partitioning showed substantial shared explanatory variation among photosynthetic-pigment traits, leaf nutrient stoichiometry, and microenvironmental factors, whereas redundancy analysis (RDA) identified leaf N, P, N:P, leaf temperature (LT), vapor pressure deficit (VPD), and chlorophyll a/b (Chl a/b) as key explanatory variables.
Conclusion: These results indicate that photosynthetic performance and leaf nutrient stoichiometry in B. mariqueter are linked within an integrated environmental–physiological framework rather than through a simple direct relationship between leaf nutrient concentrations and carbon assimilation. Thus, P availability may play an important role in seasonal nutrient regulation. This multidimensional coordination of carbon acquisition, water use, and nutrient status may contribute to the adaptation of B. mariqueter to the dynamic coastal tidal-flat environment and provide a physiological basis for its conservation and restoration.
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BibTeX
@article{wang2026coordination,
title = {{Coordination of photosynthetic performance and leaf N:P stoichiometry under fluctuating coastal environmental conditions in Bolboschoenoplectus mariqueter}},
author = {Jiayuan Wang and Lianjiang Lyu and Xuexin Shao and Tonggui Wu and Fang Zhou and Long Zhang and Wenwen Yuan},
journal = {Frontiers in Plant Science},
year = {2026},
month = oct,
doi = {10.3389/fpls.2026.1911028},
url = {https://doi.org/10.3389/fpls.2026.1911028},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Coordination of photosynthetic performance and leaf N:P stoichiometry under fluctuating coastal environmental conditions in Bolboschoenoplectus mariqueter
AU - Jiayuan Wang
AU - Lianjiang Lyu
AU - Xuexin Shao
AU - Tonggui Wu
AU - Fang Zhou
AU - Long Zhang
AU - Wenwen Yuan
PY - 2026
DA - 2026/10/12
JO - Frontiers in Plant Science
DO - 10.3389/fpls.2026.1911028
UR - https://doi.org/10.3389/fpls.2026.1911028
AB - Introduction: The population of Bolboschoenoplectus mariqueter has substantially declined because of habitat modification and competition. Therefore, this study aimed to characterize the photosynthetic and stoichiometric traits of B. mariqueter and their environmental regulation in a natural tidal-flat population to facilitate successful conservation. Methods: Light- and CO2-response characteristics, diurnal and seasonal dynamics of leaf gas exchange, daily carbon assimilation and transpiration, chlorophyll characteristics, and leaf nitrogen (N) and phosphorus (P) stoichiometry in a natural were investigated in a × B. mariqueter population in Hangzhou Bay, China. Random forest, variation partitioning, and redundancy analyses were used to evaluate the relationships among photosynthetic performance, leaf nutrient stoichiometry, and microenvironmental factors. Results: The net photosynthetic rate (Pn), transpiration rate (Tr), and water-use efficiency (WUE) varied substantially among months. Pn and Tr showed generally coordinated diurnal dynamics, whereas daily carbon assimilation and transpiration followed partially divergent seasonal trajectories after July. Leaf N and P concentrations and N:P ratios exhibited pronounced and asynchronous seasonal variations. The random forest model explained 65%, 69%, and 42% of the variations in Pn, Tr, and WUE, respectively. Leaf P and N:P were the main predictors of Pn; N, P, and N:P, of Tr; and N and P, of WUE. Variation partitioning showed substantial shared explanatory variation among photosynthetic-pigment traits, leaf nutrient stoichiometry, and microenvironmental factors, whereas redundancy analysis (RDA) identified leaf N, P, N:P, leaf temperature (LT), vapor pressure deficit (VPD), and chlorophyll a/b (Chl a/b) as key explanatory variables. Conclusion: These results indicate that photosynthetic performance and leaf nutrient stoichiometry in B. mariqueter are linked within an integrated environmental–physiological framework rather than through a simple direct relationship between leaf nutrient concentrations and carbon assimilation. Thus, P availability may play an important role in seasonal nutrient regulation. This multidimensional coordination of carbon acquisition, water use, and nutrient status may contribute to the adaptation of B. mariqueter to the dynamic coastal tidal-flat environment and provide a physiological basis for its conservation and restoration.
SN - 1664-462X
ER -