Synergistic regulation of photosynthetic efficiency at physiological and transcriptional levels in Ottelia acuminata under single and combined nitrogen and phosphorus treatments

Date

2026-04-01

Author

Zhou, Xiong-Li
Dai, Ni-Fei
Wang, Si-Qi
Rui-Zhang, Rui-Zhang
Lyu, Zhen-Yu
Jeppesen, Erik
Yang, Liu
Shen, Shi-Kang

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Eutrophication in plateau lakes is a major global challenge driven by excessive nitrogen (N) and phosphorus (P) inputs ; however, whether N or P is the dominant limiting nutrient remains controversial. To address this issue, we investigated the responses of Ottelia acuminata to different N and P levels using integrated physiological and transcriptomic analyses. Physiological traits and chlorophyll fluorescence parameters exhibited both synergistic and antagonistic responses to N and P treatments. N primarily regulated electron transport efficiency and light energy conversion, whereas P mainly activated photoprotective mechanisms. High P alone and combined N and P treatments inhibited genes related to photosynthetic electron transport, light-harvesting complexes, and pigment metabolism, whereas high N alone upregulated genes involved in pigments, electron transport, ATPase, and the cytochrome b6/f complex. These findings enhance understanding of eutrophication adaptation and growth in O. acuminata and provide nutrient control strategies for endangered species conservation and eutrophication management in plateau lakes.

Subject Keywords

Endangered species, Eutrophication, Limiting nutrient, Photosynthesis, Plateau lakes

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=105030821762&origin=inward
https://hdl.handle.net/11511/118849

Collections

Department of Biology, Article