Control of ascorbic acid synthesis and accumulation and glutathione by the incident light red/far red ratio in Phaseolus vulgaris leaves

dc.creatorBartoli, Carlos Guillermo
dc.creatorTambussi, Eduardo Alberto
dc.creatorFanello, Diego Darío
dc.creatorFoyer, Christine H.
dc.date2009
dc.date2019-10-04T16:39:04Z
dc.identifierhttp://sedici.unlp.edu.ar/handle/10915/82751
dc.identifierissn:0014-5793
dc.descriptionThe effects of red/far red (R/FR) ratios on leaf ascorbate (AA) and glutathione (GSH) accumulation were examined in common bean (Phaseolus vulgaris L.). Growth under low R/FR ratios resulted in a "shade" phenotype and much lower leaf AA and GSH contents than high (R/FR) ratios. Photosynthesis rates were unaffected by changes in the R/FR ratio but leaf respiration rates, pyridine nucleotide pools and antioxidant enzyme activities were decreased under the low R/FR regime. The GSH pool changed slowly in response to altered R/FR ratios but leaf ascorbate acclimated over a single photoperiod. We conclude that light quality signals, particularly R/FR ratios, are important regulators of antioxidant synthesis and accumulation. These acclimatory changes are an early response to changing light environment.
dc.descriptionInstituto de Fisiología Vegetal
dc.formatapplication/pdf
dc.format118-122
dc.languageen
dc.rightshttp://creativecommons.org/licenses/by-nc-sa/4.0/
dc.rightsCreative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.subjectCiencias Agrarias
dc.subjectAscorbic acid synthesis
dc.subjectGlutathione
dc.subjectl-galactone-1,4-lactone dehydrogenase
dc.subjectLight acclimation
dc.subjectPhytochrome
dc.subjectPyridine nucleotide
dc.subjectRespiration
dc.titleControl of ascorbic acid synthesis and accumulation and glutathione by the incident light red/far red ratio in Phaseolus vulgaris leaves
dc.typeArticulo
dc.typeArticulo


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