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The eco‐evolutionary significance of rainfall constancy for facultative CAM photosynthesis

Schweiger, Andreas H. ; Nürk, Nicolai M. ; Beckett, Heath ; Liede‐Schumann, Sigrid ; Midgley, Guy F. ; Higgins, Steven I.

The New phytologist, 2021-05, Vol.230 (4), p.1653-1664 [Periódico revisado por pares]

England: Wiley Subscription Services, Inc

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Título:
The eco‐evolutionary significance of rainfall constancy for facultative CAM photosynthesis
Autor: Schweiger, Andreas H. ; Nürk, Nicolai M. ; Beckett, Heath ; Liede‐Schumann, Sigrid ; Midgley, Guy F. ; Higgins, Steven I.
Assuntos: Analysis ; Carbon Dioxide ; Climate change ; Climate prediction ; climatic predictability ; Computer-aided manufacturing ; Crassulacean Acid Metabolism ; crassulacean acid metabolism (CAM) evolution ; Dependence ; Entropy ; environmental entropy ; Evolution ; Leaves ; metabolic flexibility ; Metabolism ; Photosynthesis ; Phylogeny ; Plant Leaves ; Precipitation variability ; Rain ; Rain and rainfall ; Rainfall ; rainfall variability ; Seasonal variations ; Seasonality ; succulence ; Temperature ; Temporal variations
É parte de: The New phytologist, 2021-05, Vol.230 (4), p.1653-1664
Notas: Dedication: We would like to thank H. E. K. Hartmann (1942–2016) who dedicated her life to
and other members of the Aizoaceae by collecting and describing numerous species in this family of succulent plants.
Drosanthemum
Descrição: Summary A flexible use of the crassulacean acid metabolism (CAM) has been hypothesised to represent an intermediate stage along a C3 to full CAM evolutionary continuum, when relative contributions of C3 vs CAM metabolism are co‐determined by evolutionary history and prevailing environmental constraints. However, evidence for such eco‐evolutionary interdependencies is lacking. We studied these interdependencies for the leaf‐succulent genus Drosanthemum (Aizoaceae, Southern African Succulent Karoo) by testing for relationships between leaf δ13C diagnostic for CAM dependence (i.e. contribution of C3 and CAM to net carbon gain), and climatic variables related to temperature and precipitation and their temporal variation. We further quantified the effects of shared phylogenetic ancestry on CAM dependence and its relation to climate. CAM dependence is predicted by rainfall and its temporal variation, with high predictive power of rainfall constancy (temporal entropy). The predictive power of rainfall seasonality and temperature‐related variables was negligible. Evolutionary history of the tested clades significantly affected the relationship between rainfall constancy and CAM dependence. We argue that higher CAM dependence might provide an adaptive advantage in increasingly unpredictable rainfall environments when the anatomic exaptation (succulence) is already present. These observations might shed light on the evolution of full CAM.
Editor: England: Wiley Subscription Services, Inc
Idioma: Inglês

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The eco‐evolutionary significance of rainfall constancy for facultative CAM photosynthesis

Schweiger, Andreas H. ; Nürk, Nicolai M. ; Beckett, Heath ; Liede‐Schumann, Sigrid ; Midgley, Guy F. ; Higgins, Steven I.

England: Wiley Subscription Services, Inc

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