Experimental and modeling evidence of carbon limitation of leaf appearance rate for spring and winter wheat

Journal of Experimental Botany
Maeva BaumontPierre Martre

Abstract

Accurate predictions of the timing of physiological stages and the development rate are crucial for predicting crop performance under field conditions. Plant development is controlled by the leaf appearance rate (LAR) and our understanding of how LAR responds to environmental factors is still limited. Here, we tested the hypothesis that carbon availability may account for the effects of irradiance, photoperiod, atmospheric CO2 concentration, and ontogeny on LAR. We conducted three experiments in growth chambers to quantify and disentangle these effects for both winter and spring wheat cultivars. Variations of LAR observed between environmental scenarios were well explained by the supply/demand ratio for carbon, quantified using the photothermal quotient. We therefore developed an ecophysiological model based on the photothermal quotient that accounts for the effects of temperature, irradiance, photoperiod, and ontogeny on LAR. Comparisons of observed leaf stages and LAR with simulations from our model, from a linear thermal-time model, and from a segmented linear thermal-time model corrected for sowing date showed that our model can simulate the observed changes in LAR in the field with the lowest error. Our findings demonstrat...Continue Reading

References

May 31, 2001·Evolutionary Computation·N Hansen, A Ostermeier
Jun 14, 2003·Annals of Botany·Nereu Augusto StreckP Stephen Baenziger
Jan 22, 2005·Annals of Botany·Masami Monsi, Toshiro Saeki
Apr 9, 2011·Plant Physiology·Florent PantinBertrand Muller
May 1, 2012·Current Opinion in Plant Biology·Mark Stitt, Samuel C Zeeman
Nov 17, 2017·Plant Physiology·Pierre Martre, Anaelle Dambreville

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Citations

May 16, 2019·Journal of Experimental Botany·Bertrand Muller, Pierre Martre
Aug 26, 2020·The New Phytologist·Ruth N WadeColin P Osborne
Jul 1, 2020·Frontiers in Plant Science·Claudio O Stöckle, Armen R Kemanian
Jul 20, 2020·Current Opinion in Plant Biology·Michael DingkuhnMatthew J Paul

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Software Mentioned

R package smatr3
phyllochron
SiriusQuality
R
SiriusQulity
BioMA
APSIM

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