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Plant proton pumps as markers of biostimulant action Scientia Agricola
Zandonadi,Daniel Basílio; Santos,Mirella Pupo; Caixeta,Lisanne Santos; Marinho,Eduardo Barros; Peres,Lázaro Eustáquio Pereira; Façanha,Arnoldo Rocha.
ABSTRACT A standard protocol to evaluate the effects of biostimulants on plant physiology is still lacking. The proton pumps present in the vacuolar and plasma membranes are the primary agents responsible for the regulation of the electrochemical gradient that energizes the nutrient uptake system and acid growth mechanism of plant cells. In this study, two of these enzymes were characterized as biochemical markers of biostimulant activity. A simple and fast protocol based on the degree of root acidification using a pH sensitive dye and the Micro-Tom tomato as a plant model is proposed as an efficient methodology to prove the efficacy of biostimulants that are claimed to improve nutrient acquisition and root growth. The results agree with the data from more...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Micro-Tom; Acidification; Auxin; Rhizosphere; Bromocresol.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000100024
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