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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Exploring C-4-CAM plasticity within the Portulaca oleracea complex

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Ferrari, Renata Callegari [1] ; Cruz, Bruna Coelho [1] ; Gastaldi, Vinicius Daguano [1] ; Storl, Thalyson [1] ; Ferrari, Elisa Callegari [1] ; Boxall, Susanna F. [2] ; Hartwell, James [2] ; Freschi, Luciano [1]
Total Authors: 8
[1] Univ Sao Paulo, Inst Biociencias, Dept Bot, Sao Paulo - Brazil
[2] Univ Liverpool, Inst Integrat Biol, Dept Funct & Comparat Genom, Liverpool, Merseyside - England
Total Affiliations: 2
Document type: Journal article
Source: SCIENTIFIC REPORTS; v. 10, n. 1 AUG 28 2020.
Web of Science Citations: 3

Portulaca oleracea is a C-4 herb capable of performing CAM under drought stress. It is distributed worldwide and is either considered a polymorphic species or a complex of subspecies, due to its numerous morphological variations. We evaluated CAM plasticity within P. oleracea genotypes since the complexity surrounding this species may be reflected in intraspecific variations in photosynthetic behavior. Eleven subspecies of P. oleracea from distant geographical locations and one cultivar were morphologically and physiologically characterized. C-4 and CAM photosynthesis were monitored in plants exposed to well-watered, droughted and rewatered treatments, and data obtained were compared among individual genotypes. All subspecies expressed CAM in a fully-reversible manner. Transcript abundance of C-4-CAM signature genes was shown to be a useful indicator of the C-4-CAM-C-4 switches in all genotypes. C-4-related genes were down-regulated and subsequently fully expressed upon drought and rewatering, respectively. CAM-marker genes followed the opposite pattern. A gradient of morphological traits and drought-induced nighttime malate accumulation was observed across genotypes. Therefore, different combinations of CAM expression levels, plant sizes and shapes are available within the P. oleracea complex, which can be a valuable tool in the context of C-4/CAM photosynthesis research. (AU)

FAPESP's process: 16/04755-4 - Exploring C4 and Crassulacean Acid Metabolism (CAM) compatibility within a single organism: changes in global transcriptional profile, hormonal regulation, and tissue localization of key C4 and CAM components in Portulaca oleracea
Grantee:Renata Callegari Ferrari
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)