Alterations in chlorophyll a fluorescence, pigment concentrations and lipid peroxidation to chilling temperature in coffee seedlings

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorOliveira, Jurandi Gonçalves de
dc.creatorAguiar Alves, Pedro Luís da Costa
dc.creatorVitória, Angela Pierre
dc.date2014-05-27T11:24:00Z
dc.date2016-10-25T18:27:31Z
dc.date2014-05-27T11:24:00Z
dc.date2016-10-25T18:27:31Z
dc.date2009-11-01
dc.date.accessioned2017-04-06T01:37:34Z
dc.date.available2017-04-06T01:37:34Z
dc.identifierEnvironmental and Experimental Botany, v. 67, n. 1, p. 71-76, 2009.
dc.identifier0098-8472
dc.identifierhttp://hdl.handle.net/11449/71214
dc.identifierhttp://acervodigital.unesp.br/handle/11449/71214
dc.identifier10.1016/j.envexpbot.2009.05.007
dc.identifier2-s2.0-69349104475
dc.identifierhttp://dx.doi.org/10.1016/j.envexpbot.2009.05.007
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/892221
dc.descriptionCoffea arabica L. is considered to be sensitive to low temperatures throughout its life cycle. In some Brazilian regions, seedling production occurs under shade conditions and during the winter, with average temperatures of around 10 °C. The formation and functioning of the photosynthetic apparatus are strongly controlled by temperature. This study aimed to assess the changes that occurred in pigment contents, lipid peroxidation and variables of chlorophyll a fluorescence during the greening process of coffee seedlings submitted to chilling. Results indicate that saturation of the photosynthetic activity of coffee seedlings occurred before saturation of the accumulation of chloroplastid pigments. Pigment accumulation during the greening process is far beyond the metabolic needs for the maintenance of photosynthetic activity, more specifically of photosystem II. Coffee seedlings attained a quantum yield equivalent to that of the control with approximately half the chlorophyll a and b contents and around 40% of the carotenoid. Low temperature decreases the metabolism of seedlings, consequently reducing free radical production and lipid peroxidation. The chilling temperature (10 °C) used inhibited the accumulation of chloroplast pigments, in turn altering the capacity of the photosynthetic tissue of etiolated coffee seedlings to capture and transfer photon energy to the photosystem II reaction centre. These alterations were better demonstrated by O-J-I-P chlorophyll a fluorescence transients, rather than F v/F m and F v/F 0 ratios. © 2009 Elsevier B.V. All rights reserved.
dc.languageeng
dc.relationEnvironmental and Experimental Botany
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectChlorophyll a fluorescence transient O-J-I-P
dc.subjectCoffea arabica L.
dc.subjectEnvironmental stress
dc.subjectPhotosynthetic pigments
dc.subjectPhotosystem II quantum yield
dc.subjectcarotenoid
dc.subjectchlorophyll a
dc.subjectchloroplast
dc.subjectcoffee
dc.subjectconcentration (composition)
dc.subjectenvironmental stress
dc.subjectlipid
dc.subjectphotosynthesis
dc.subjectseedling
dc.subjecttemperature effect
dc.subjectCoffea arabica
dc.subjectViridiplantae
dc.titleAlterations in chlorophyll a fluorescence, pigment concentrations and lipid peroxidation to chilling temperature in coffee seedlings
dc.typeOtro


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