Linking bark anatomy to Eucalyptus Physiological Disorder (EPD) in commercial clones

A tétel rövid nézete
dc.contributor.authorPicoli, Edgard
dc.contributor.authorJacomini, Franciely
dc.contributor.authorLadeira, Josimar
dc.contributor.authorAlmeida, Maria Naruna
dc.contributor.authorVidaurre, Graziela
dc.contributor.authorMoulin, Jordão
dc.contributor.authorZauza, Edival
dc.contributor.authorGuimarães, Lúcio
dc.contributor.authorIsaias, Rosy Mary
dc.contributor.authorBalmant, Kelly
dc.contributor.authorda Costa, Weverton
dc.date.accessioned2026-01-15T10:21:31Z
dc.date.available2026-01-15T10:21:31Z
dc.date.issued2025-07-08
dc.description.abstractAbiotic stresses trigger the Eucalyptus Physiological Disorder (EPD) which poses a threat to planted and native stands. This research seeks links between eucalyptus bark histological features and EPD, in which the descriptive bark anatomy and histochemistry are approached. Barks from 5-year eucalyptus trees, from commercial clones of E. grandis , E. urophylla and its hybrids, were collected at breast height (DBH), and 50% and 75% of the commercial height, and evaluated. The eucalyptus bark consisted of a periderm (or rhytidome) and a secondary phloem with conspicuous solitary sieve tube elements (STE). The outer bark revealed a secondary phloem with collapsed STE, whereas its inner counterpart displayed non-collapsed STEs. A region crowded with calcium oxalate (CaOx) crystals in axial parenchyma, covering the non-collapsed and partially overlapped collapsed secondary phloem, was observed. Eucalyptus barks exhibited similar anatomical organization at DBH, 50% and 75% of the commercial height, irrespective of expected EPD phenotype or scores. Notwithstanding, there are qualitative differences that are associated with the proportion of non-collapsed phloem and phloem with crystals, which were higher in the tolerant clones and in trees with score 0. The more resistant clones or samples with lower EPD scores exhibited a higher proportion of the regions of living phloem, phloem with CaOx crystals, and non-collapsed phloem. These results support the hypothesis that an increased proportion of STE collapse will occur concurrently with elevated EPD scores and are the basis for an ongoing histometric approach.  en
dc.formatapplication/pdf
dc.identifier.citationInternational Journal of Horticultural Science, Vol. 31 (2025) , 73-87.
dc.identifier.doihttps://doi.org/10.31421/ijhs/31/2025/15419
dc.identifier.eissn2676-931X
dc.identifier.issn1585-0404
dc.identifier.issue1
dc.identifier.jatitleInt. j. hortic. sci.
dc.identifier.jtitleInternational Journal of Horticultural Science
dc.identifier.urihttps://hdl.handle.net/2437/402489
dc.identifier.volume31
dc.languageen
dc.relationhttps://ojs.lib.unideb.hu/IJHS/article/view/15419
dc.rights.accessOpen Access
dc.rights.ownerInternational Journal of Horticultural Science
dc.subjectbark anatomyen
dc.subjectdiebacken
dc.subjectEPDen
dc.subjectEucalyptusen
dc.subjectphloem anatomyen
dc.subjectplanted foresten
dc.titleLinking bark anatomy to Eucalyptus Physiological Disorder (EPD) in commercial clonesen
dc.typefolyóiratcikkhu
dc.typearticleen
dc.type.detailedidegen nyelvű folyóiratközlemény hazai lapbanhu
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International Journal of Horticultural Science (DE-journals)