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Transcriptomic leaf profiling reveals differential responses of two most traded coffee species to elevated [CO2]
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Orientador(es)
Resumo(s)
As atmospheric [CO2] continues to rise to unprecedented levels, understanding its impact on
plants is imperative to improve crop performance and sustainability under future climate conditions.
In this context, transcriptional changes promoted by elevated CO2 (eCO2) were studied in genotypes
from the two major traded co ee species: the allopolyploid Co ea arabica (Icatu) and its diploid
parent, C. canephora (CL153). While Icatu expressed more genes than CL153, a higher number of
di erentially expressed genes were found in CL153 as a response to eCO2. Although many genes
were found to be commonly expressed by the two genotypes under eCO2, unique genes and pathways
di ered between them, with CL153 showing more enriched GO terms and metabolic pathways than
Icatu. Divergent functional categories and significantly enriched pathways were found in these
genotypes, which altogether supports contrasting responses to eCO2. A considerable number of genes
linked to co ee physiological and biochemical responses were found to be a ected by eCO2 with the
significant upregulation of photosynthetic, antioxidant, and lipidic genes. This supports the absence
of photosynthesis down-regulation and, therefore, the maintenance of increased photosynthetic
potential promoted by eCO2 in these co ee genotypes
Descrição
Palavras-chave
climate change coffee tree elevated air [CO2] functional analysis leaf RNAseq
Contexto Educativo
Citação
Int. J. Mol. Sci. 2020, 21, 9211
Editora
MDPI