Gas Exchange, Chlorophyll and Growth Responses of Betula Platyphylla Seedlings to Elevated CO2 and Nitrogen
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Plant physiology experiment on birch seedlings under elevated CO2 and nitrogen; the object is plant growth.
The work examines plant responses to carbon dioxide and nitrogen.
Plant physiology under elevated CO2 and nitrogen.
Résumé
Effects of elevated [CO2] and nitrogen nutrition on leaf gas exchange, chlorophyll content and growth in Betulaplatyphylla seedlings were studied. The seedlings were grown in the ambient [CO2] (AC, 350????mol mol-1) and elevated[CO2] (EC, 700????mol mol-1) growth chambers, with three levels of nitrogen: LN (0mmol L-1 N), MN (1.5mmol L-1 N)and HN (3mmol L-1 N). HN increased photosynthesis (Pmax), photochemical efficiency of PSII (Fv/Fm) and intercellular[CO2] (Ci) by 120%, 8% and 11% than the LN. EC significantly increased Pmax and Ci by 37% and 57% compared tothe AC. The interaction of EC and LN was significant increased by 85% than the AC+MN, and could be attributed toboth inhibition of photosynthetic light reactions and carboxylation activity of Rubisco. In AC and EC, total biomasswere 3.2 and 5.1 times greater in HN compared to LN. Root biomass increased significantly in HN level under both ACand EC. Chlorophyll (Chl) a and Chl b increased with increasing N availability.
Conservé avec la notice de tri, où il sert de preuve aux étiquettes ci-dessus.
La notice
- Revue
- International Journal of Biology
- Thématique
- Plant responses to elevated CO2
- Domaine
- Agricultural and Biological Sciences
- Établissements canadiens
- —
- Organismes subventionnaires
- —
- Mots-clés
- PhotosynthesisCarboxylationNitrogenRuBisCOChlorophyllChemistryChlorophyll aBetula platyphyllaHorticultureCarbon dioxideBotanyAnimal scienceBiologyBiochemistry
- Résumé présent dans OpenAlex
- oui