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LEAF ANATOMY CHARACTERIZATION OF FOUR Apochloa SPECIES: A C3 GENUS RELATED TO EVOLUTION OF C4 PATHWAY IN GRASSES Acta biol.Colomb.
MENDONÇA,Ane Marcela das Chagas; VIANA,Pedro Lage; BARBOSA,João Paulo Rodrigues Alves Delfino.
ABSTRACT Leaf anatomy characteristics provide important evidences about the transition between C3 and C4 pathways. The C4 photosynthesis pathway allowed to reduce the C3 photorespiratory rate, concentrating CO2 around the Rubisco site and using structures and machinery already presented in C3 plants. In monocots, it is observed a high number of C4 lineages, most of them phylogenetically related to C3 groups. The genus Apochloa (C3), subtribe Arthropogoninae, is related to two C4 genera Coleataenia and Cyphonanthus. The aim of this study was to evaluate four Apochloa species in order to establish anatomical characteristics related to the evolution of C4 pathway in this group. By means of transverse sections fully expanded leaves of A. euprepes, A. lorea, A....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Apochloa spp; C4 photosynthesis; Leaf anatomy; Poaceae; Subtribe arthropogoninae.
Ano: 2021 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2021000100012
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Regulation of the expression of NADP-malic enzyme by UV-B, red and far-red light in maize seedlings BJMBR
Casati,P.; Drincovich,M.F.; Edwards,G.E.; Andreo,C.S..
The induction of nicotinamide adenine dinucleotide phosphate-malic enzyme (NADP-ME) in etiolated maize (Zea mays) seedlings by UV-B and UV-A radiation, and different levels of photosynthetically active radiation (PAR, 400-700 nm) was investigated by measuring changes in activity, protein quantity and RNA levels as a function of intensity and duration of exposure to the different radiations. Under low levels of PAR, exposure to UV-B radiation but not UV-A radiation for 6 to 24 h caused a marked increase in the enzyme levels similar to that observed under high PAR in the absence of UV-B. UV-B treatment of green leaves following a 12-h dark period also caused an increase in NADP-ME expression. Exposure to UV-B radiation for only 5 min resulted in a rapid...
Tipo: Info:eu-repo/semantics/article Palavras-chave: C4 photosynthesis; NADP-malic enzyme; UV-B radiation; Photosynthesis; Red light; Far-red light.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999001000002
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