Modelling nonlinear dynamics of Crassulacean acid metabolism productivity and water use for global predictions

© 2020 John Wiley & Sons Ltd..

Crassulacean acid metabolism (CAM) crops are important agricultural commodities in water-limited environments across the globe, yet modelling of CAM productivity lacks the sophistication of widely used C3 and C4 crop models, in part due to the complex responses of the CAM cycle to environmental conditions. This work builds on recent advances in CAM modelling to provide a framework for estimating CAM biomass yield and water use efficiency from basic principles. These advances, which integrate the CAM circadian rhythm with established models of carbon fixation, stomatal conductance and the soil-plant-atmosphere continuum, are coupled to models of light attenuation, plant respiration and biomass partitioning. Resulting biomass yield and transpiration for Opuntia ficus-indica and Agave tequilana are validated against field data and compared with predictions of CAM productivity obtained using the empirically based environmental productivity index. By representing regulation of the circadian state as a nonlinear oscillator, the modelling approach captures the diurnal dynamics of CAM stomatal conductance, allowing the prediction of CAM transpiration and water use efficiency for the first time at the plot scale. This approach may improve estimates of CAM productivity under light-limiting conditions when compared with previous methods.

Medienart:

E-Artikel

Erscheinungsjahr:

2021

Erschienen:

2021

Enthalten in:

Zur Gesamtaufnahme - volume:44

Enthalten in:

Plant, cell & environment - 44(2021), 1 vom: 19. Jan., Seite 34-48

Sprache:

Englisch

Beteiligte Personen:

Hartzell, Samantha [VerfasserIn]
Bartlett, Mark S [VerfasserIn]
Inglese, Paolo [VerfasserIn]
Consoli, Simona [VerfasserIn]
Yin, Jun [VerfasserIn]
Porporato, Amilcare [VerfasserIn]

Links:

Volltext

Themen:

059QF0KO0R
7440-44-0
Agave tequilana
Biomass
Carbon
Carbon assimilation
Crassulacean acid metabolism
Journal Article
Opuntia ficus-indica
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
Water
Water use efficiency

Anmerkungen:

Date Completed 08.06.2021

Date Revised 08.06.2021

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1111/pce.13918

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM316427918