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Metabolic background, not photosynthetic physiology, determines drought and drought recovery responses in C3 and C2 moricandias
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Orientador(es)
Resumo(s)
Distinct photosynthetic physiologies are found within the Moricandia genus, both C3-type
and C2-type representatives being known. As C2-physiology is an adaptation to drier environments,
a study of physiology, biochemistry and transcriptomics was conducted to investigate whether plants
with C2-physiology are more tolerant of low water availability and recover better from drought. Our
data on Moricandia moricandioides (Mmo, C3), M. arvensis (Mav, C2) and M. suffruticosa (Msu, C2) show
that C3 and C2-type Moricandias are metabolically distinct under all conditions tested (well-watered,
severe drought, early drought recovery). Photosynthetic activity was found to be largely dependent
upon the stomatal opening. The C2-type M. arvensis was able to secure 25–50% of photosynthesis
under severe drought as compared to the C3-type M. moricandioides. Nevertheless, the C2-physiology
does not seem to play a central role in M. arvensis drought responses and drought recovery. Instead,
our biochemical data indicated metabolic differences in carbon and redox-related metabolism under
the examined conditions. The cell wall dynamics and glucosinolate metabolism regulations were
found to be major discriminators between M. arvensis and M. moricandioides at the transcription level.
Descrição
Palavras-chave
C2-metabolic signature C3-C4 intermediates RNAseq starch and sugars
Contexto Educativo
Citação
Pinheiro, C.; Emiliani, G.; Marino, G.; Fortunato, A.S.; Haworth, M.; De Carlo, A.; Chaves, M.M.; Loreto, F.; Centritto, M. Metabolic background, not photosynthetic physiology, determines drought and drought recovery responses in C3 and C2 moricandias. Int. J. Mol. Sci. 2023, 24, 4094.
Editora
MDPI