A leaf gas exchange model that accounts for intra-canopy variability by considering leaf nitrogen content and local acclimation to radiation in grapevine (Vitis vinifera L.)

Plant, Cell & Environment
Jorge A PrietoEric Lebon

Abstract

Understanding the distribution of gas exchange within a plant is a prerequisite for scaling up from leaves to canopies. We evaluated whether leaf traits were reliable predictors of the effects of leaf ageing and leaf irradiance on leaf photosynthetic capacity (V(cmax) , J(max) ) in field-grown vines (Vitis vinifera L). Simultaneously, we measured gas exchange, leaf mass per area (LMA) and nitrogen content (N(m) ) of leaves at different positions within the canopy and at different phenological stages. Daily mean leaf irradiance cumulated over 10 d (PPFD(10) ) was obtained by 3D modelling of the canopy structure. N(m) decreased over the season in parallel to leaf ageing while LMA was mainly affected by leaf position. PPFD(10) explained 66, 28 and 73% of the variation of LMA, N(m) and nitrogen content per area (N(a) ), respectively. Nitrogen content per unit area (N(a) = LMA × N(m) ) was the best predictor of the intra-canopy variability of leaf photosynthetic capacity. Finally, we developed a classical photosynthesis-stomatal conductance submodel and by introducing N(a) as an input, the model accurately simulated the daily pattern of gas exchange for leaves at different positions in the canopy and at different phenological stages...Continue Reading

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Citations

Oct 21, 2016·Global Change Biology·Jonathan R MosedaleIlya M D Maclean
Dec 8, 2016·Plant, Cell & Environment·Grace L MinerDennis D Baldocchi
Apr 28, 2021·Plant Science : an International Journal of Experimental Plant Biology·Carina V GonzálezCarla V Giordano
Aug 19, 2021·Journal of the Science of Food and Agriculture·Yei-Kheng TeeNing-Geng Ong
Sep 21, 2021·Tree Physiology·Francesca GrisafiSergio Tombesi

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