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

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 ecophysio

SUBMITTER: Baumont M 

PROVIDER: S-EPMC6487592 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature