Toward a hierarchical concept of plant stress

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dc.contributor.authorSouza, G. M.
dc.contributor.authorCardoso, VJM
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-02-26T17:16:15Z
dc.date.accessioned2014-05-20T13:56:36Z
dc.date.available2014-02-26T17:16:15Z
dc.date.available2014-05-20T13:56:36Z
dc.date.issued2003-01-01
dc.description.abstractA number of attempts have been made to obtain a clear definition of biological stress. However, in spite of the efforts, some controversies on the concept of plant stress remain. The current versions are centered either on the cause (stress factor) or on the effect (stress response) of environmental stress. The objective of this study was to contribute to the definition of stress, using a hierarchical approach. Thus, we have performed an analysis of the most usual stress concepts and tested the relevance of considering different observation scales in a study on plant response to water deficit. Seedlings of Eucalyptus grandis were grown in vitro at water potentials ranging from -0.16 to -0.6 MPa, and evaluated according to growth and biochemical parameters. Data were analyzed through principal component analysis (PCA), which pointed to a hierarchical organization in plant responses to environmental disturbances. Growth parameters (height and dry weight) are more sensitive to water deficit than biochemical ones (sugars, proline, and protein), suggesting that higher hierarchical levels were more sensitive to environmental constraints than lower hierarchical ones. We suggest that before considering an environmental fluctuation as stressful, it is necessary to take into account different levels of plant response, and that the evaluation of the effects of environmental disturbances on an organism depends on the observation scale being used. Hence, a more appropriate stress concept should consider the hierarchical organization of the biological systems, not only for a more adequate theoretical approach, but also for the improvement of practical studies on plants under stress.en
dc.description.affiliationUNESP, Dept Bot, BR-13506900 Rio Claro, SP, Brazil
dc.description.affiliationUnespUNESP, Dept Bot, BR-13506900 Rio Claro, SP, Brazil
dc.format.extent29-37
dc.identifierhttp://dx.doi.org/10.1560/P6TM-RJEL-R5FU-Q039
dc.identifier.citationIsrael Journal of Plant Sciences. Jerusalem: Laser Pages Publ Ltd, v. 51, n. 1, p. 29-37, 2003.
dc.identifier.doi10.1560/P6TM-RJEL-R5FU-Q039
dc.identifier.issn0792-9978
dc.identifier.lattes6960838311041673
dc.identifier.urihttp://hdl.handle.net/11449/20238
dc.identifier.wosWOS:000183333000004
dc.language.isoeng
dc.publisherLaser Pages Publ Ltd
dc.relation.ispartofIsrael Journal of Plant Sciences
dc.relation.ispartofjcr0.672
dc.relation.ispartofsjr0,244
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleToward a hierarchical concept of plant stressen
dc.typeArtigo
dcterms.licensehttp://journalauthors.tandf.co.uk/permissions/reusingOwnWork.asp
dcterms.rightsHolderLaser Pages Publ Ltd
unesp.author.lattes6960838311041673
unesp.author.orcid0000-0001-6754-4860[1]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Rio Claropt

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Artigos - Botânica - IBRC