Environmental triggers for photosynthetic protein turnover determine the optimal nitrogen distribution and partitioning in the canopy

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dc.identifier.uri http://dx.doi.org/10.15488/4717
dc.identifier.uri https://www.repo.uni-hannover.de/handle/123456789/4759
dc.contributor.author Pao, Yi-Chen ger
dc.contributor.author Chen, Tsu-Wei ger
dc.contributor.author Moualeu-Ngangue, Dany Pascal ger
dc.contributor.author Stütze, Hartmut ger
dc.date.accessioned 2019-04-17T12:44:01Z
dc.date.available 2019-04-17T12:44:01Z
dc.date.issued 2018
dc.identifier.citation Pao, Y.-C.; Chen, T.-S.; Moualeu-Ngangue, D. P.; Stützel, H.: Environmental triggers for photosynthetic protein turnover determine the optimal nitrogen distribution and partitioning in the canopy. In: Journal of Experimental Botany (2018), ery308. DOI: https://doi.org/doi:10.1093/jxb/ery308 ger
dc.description.abstract Plants continually adjust the photosynthetic functions in their leaves to fluctuating light, thereby optimizing the use of photosynthetic nitrogen (Nph) at the canopy level. To investigate the complex interplay between external signals during the acclimation processes, a mechanistic model based on the concept of protein turnover (synthesis and degradation) was proposed and parameterized using cucumber grown under nine combinations of nitrogen and light in growth chambers. Integrating this dynamic model into a multi-layer canopy model provided accurate predictions of photosynthetic acclimation of greenhouse cucumber canopies grown under high and low nitrogen supply in combination with day-to-day fluctuations in light at two different levels. This allowed us to quantify the degree of optimality in canopy nitrogen use for maximizing canopy carbon assimilation, which was influenced by Nph distribution along canopy depth or Nph partitioning between functional pools. Our analyses suggest that Nph distribution is close to optimum and Nph reallocation is more important under low nitrogen. Nph partitioning is only optimal under a light level similar to the average light intensity during acclimation, meaning that day-to-day light fluctuations inevitably result in suboptimal Nph partitioning. Our results provide insights into photoacclimation and can be applied to crop model improvement. ger
dc.language.iso eng ger
dc.publisher Oxford : Oxford University Press
dc.relation.ispartofseries Journal of Experimental Botany (2018) ger
dc.rights CC BY 4.0 ger
dc.rights.uri http://creativecommons.org/licenses/by/4.0/
dc.subject Functional partitioning eng
dc.subject light eng
dc.subject mechanistic model eng
dc.subject photosynthetic acclimation eng
dc.subject nitrogen supply eng
dc.subject nitrogen reallocation eng
dc.subject.ddc 570 | Biowissenschaften, Biologie ger
dc.subject.ddc 580 | Pflanzen (Botanik) ger
dc.title Environmental triggers for photosynthetic protein turnover determine the optimal nitrogen distribution and partitioning in the canopy ger
dc.type article ger
dc.type Text ger
dc.relation.essn 1460-2431
dc.relation.isbn 0022-0957
dc.relation.doi 10.1093/jxb/ery308
dc.description.version publishedVersion ger
tib.accessRights frei zug�nglich


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