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

Zhou X., Dai N., Wang S., Rui-Zhang R., Lyu Z., Jeppesen E., ...Daha Fazla

Bioresource technology, cilt.446, ss.134212, 2026 (SCI-Expanded, Scopus) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 446
  • Basım Tarihi: 2026
  • Doi Numarası: 10.1016/j.biortech.2026.134212
  • Dergi Adı: Bioresource technology
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, BIOSIS, Chemical Abstracts Core, Compendex, EMBASE, Environment Index, Geobase, INSPEC, MEDLINE
  • Sayfa Sayıları: ss.134212
  • Anahtar Kelimeler: Endangered species, Eutrophication, Limiting nutrient, Photosynthesis, Plateau lakes
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

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.