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Retardation in seed germination and induction of oxidative stress in lettuce plants upon spent coffee grounds exposure

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dc.contributor.authorGomes, Teresa
dc.contributor.authorPereira, J.A.
dc.contributor.authorRamalhosa, Elsa
dc.contributor.authorCasal, Susana
dc.contributor.authorBaptista, Paula
dc.date.accessioned2013-09-10T11:06:33Z
dc.date.available2013-09-10T11:06:33Z
dc.date.issued2013
dc.description.abstractOver the past years, several strategies have been tentatively applied to reuse spent coffee grounds (SCG). This residue, obtained after the brewing process, has a global production around 6 million tons per year. The use of SCG in domestic agriculture is an increasing popular practice. However, scientific evidences about their effect on plants remain unknown. Caffeine present in SCG (about 0.2%) together with tannins and chlorogenic acids could have a toxic effect on soil microorganisms and plants. In this study, we intended to verify the relation between seed germination and the antioxidative system in Lactuca sativa L. cv. “Wonder of four seasons” plants upon exposure to several fresh SCG amounts. The percentage of seed germination was evaluated in Petri dishes containing SCG at different concentrations [0%, 5%, 10%, 15%, 20% and 30% (v/v)]. The response of antioxidant system to SCG was evaluated on roots and leaves of lettuce plants after being exposed for 24h to different SCG concentrations [0%, 5%, 10% and 15% (v/v)] in aqueous solution. The levels of hydrogen peroxide (H2O2), superoxide anion (O2-) and malondialdehyde (MDA), as well as the activities of superoxide dismutase (SOD) and catalase (CAT) were determined and their relation with seed germination was assessed. Results showed significant decreases in germination percentage with increasing SCG concentration, attaining a maximum inhibition (98% when compared to the control) under SCG concentrations of 30%. This effect was coincident with a significant increase of H2O2, O2- and MDA levels during the first 12 h of elicitation as well as of SOD activity, but not of CAT, showing clear signs of increased oxidative stress. SCG-induced oxidative stress was concentration-dependent and was mainly observed within the lettuces roots. Taken together, the results suggest that the effect of the SCG on seed germination was probably caused by the toxicity of compounds present in the SCG (e.g. caffeine) and also to induced oxidative stress by resulting in an imbalance between pro-oxidant and antioxidant defense mechanisms in plant cells.por
dc.description.sponsorshipFundação para a Ciência e Tecnologia (FCT), através do Projeto PTDC/AGR-AAM/102447/2008por
dc.identifier.citationGomes, Teresa; Pereira, José Alberto; Ramalhosa, Elsa; Casal, Susana; Baptista, Paula (2013). Retardation in seed germination and induction of oxidative stress in lettuce plants upon spent coffee grounds exposure. In Natacha Vieira, Nelson Saibo, M. Margarida Oliveira (Eds.) FV2013 - XIII Congresso Luso-Espanhol de Fisiologia Vegetal. Lisboapor
dc.identifier.otherDepósito Legal nº 362078/13
dc.identifier.urihttp://hdl.handle.net/10198/8716
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherNatacha Vieira, Nelson Saibo, M. Margarida Oliveirapor
dc.subjectSeed germinationpor
dc.subjectOxidative stresspor
dc.subjectLettucepor
dc.subjectSpent coffee groundspor
dc.titleRetardation in seed germination and induction of oxidative stress in lettuce plants upon spent coffee grounds exposurepor
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlaceLisboapor
oaire.citation.endPage379por
oaire.citation.startPage379por
oaire.citation.titleFV2013 - XIII Congresso Luso-Espanhol de Fisiologia Vegetalpor
person.familyNamePereira
person.familyNameRamalhosa
person.familyNameBaptista
person.givenNameJosé Alberto
person.givenNameElsa
person.givenNamePaula
person.identifier.ciencia-id611F-80B2-A7C1
person.identifier.ciencia-id1A1D-FC05-A05D
person.identifier.ciencia-id7D11-FE1E-CD0F
person.identifier.orcid0000-0002-2260-0600
person.identifier.orcid0000-0003-2503-9705
person.identifier.orcid0000-0001-6331-3731
person.identifier.ridL-6798-2014
person.identifier.scopus-author-id57204366348
person.identifier.scopus-author-id6602978189
person.identifier.scopus-author-id14051688000
rcaap.rightsopenAccesspor
rcaap.typeconferenceObjectpor
relation.isAuthorOfPublication7932162e-a2da-4913-b00d-17babbe51857
relation.isAuthorOfPublicationd74be6c0-1703-4f77-bd81-e289ec981ee3
relation.isAuthorOfPublication3f35226a-b17a-4f7d-8da1-3297105cbfe9
relation.isAuthorOfPublication.latestForDiscoveryd74be6c0-1703-4f77-bd81-e289ec981ee3

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