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Morphoanatomical Changes in Eucalyptus grandis Leaves Associated with Resistance to Austropuccinia psidii in Plants of Two Ages

The fungus Austropuccinia psidii infects young tissues of Eucalyptus plants until they are two years old in the nursery and field, causing Myrtaceae rust. The characteristics making older eucalypt leaves resistant to A. psidii and the reason for the low levels of this pathogen in older plants need e...

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Autores principales: Furtado, Edson Luiz, da Silva, André Costa, Silva, Érica Araújo Rodrigues, Rodella, Roberto Antônio, Soares, Marcus Alvarenga, Serrão, José Eduardo, de Pieri, Cristiane, Zanuncio, José Cola
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9867522/
https://www.ncbi.nlm.nih.gov/pubmed/36679066
http://dx.doi.org/10.3390/plants12020353
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author Furtado, Edson Luiz
da Silva, André Costa
Silva, Érica Araújo Rodrigues
Rodella, Roberto Antônio
Soares, Marcus Alvarenga
Serrão, José Eduardo
de Pieri, Cristiane
Zanuncio, José Cola
author_facet Furtado, Edson Luiz
da Silva, André Costa
Silva, Érica Araújo Rodrigues
Rodella, Roberto Antônio
Soares, Marcus Alvarenga
Serrão, José Eduardo
de Pieri, Cristiane
Zanuncio, José Cola
author_sort Furtado, Edson Luiz
collection PubMed
description The fungus Austropuccinia psidii infects young tissues of Eucalyptus plants until they are two years old in the nursery and field, causing Myrtaceae rust. The characteristics making older eucalypt leaves resistant to A. psidii and the reason for the low levels of this pathogen in older plants need evaluations. The aim of this study was to evaluate the morphological differences between Eucalyptus grandis leaves of different growth stages and two plant ages to propose a visual phenological scale to classify E. grandis leaves according to their maturation stages and to evaluate the time of leaf maturation for young and adult plants. A scale, based on a morphological differentiation for E. grandis leaves, was made. The color, shape and size distinguished the leaves of the first five leaf pairs. Anatomical analysis showed a higher percentage of reinforced tissue, such as sclerenchyma-like tissue and collenchyma, greater leaf blade thickness, absence of lower palisade parenchyma in the mature leaves and a higher number of cavities with essential oils than in younger ones. Changes in anatomical characteristics that could reduce the susceptibility of older E. grandis leaves to A. psidii coincide with the time of developing leaf resistance. Reduced infection of this pathogen in older plants appears to be associated with a more rapid maturation of their leaf tissues.
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spelling pubmed-98675222023-01-22 Morphoanatomical Changes in Eucalyptus grandis Leaves Associated with Resistance to Austropuccinia psidii in Plants of Two Ages Furtado, Edson Luiz da Silva, André Costa Silva, Érica Araújo Rodrigues Rodella, Roberto Antônio Soares, Marcus Alvarenga Serrão, José Eduardo de Pieri, Cristiane Zanuncio, José Cola Plants (Basel) Article The fungus Austropuccinia psidii infects young tissues of Eucalyptus plants until they are two years old in the nursery and field, causing Myrtaceae rust. The characteristics making older eucalypt leaves resistant to A. psidii and the reason for the low levels of this pathogen in older plants need evaluations. The aim of this study was to evaluate the morphological differences between Eucalyptus grandis leaves of different growth stages and two plant ages to propose a visual phenological scale to classify E. grandis leaves according to their maturation stages and to evaluate the time of leaf maturation for young and adult plants. A scale, based on a morphological differentiation for E. grandis leaves, was made. The color, shape and size distinguished the leaves of the first five leaf pairs. Anatomical analysis showed a higher percentage of reinforced tissue, such as sclerenchyma-like tissue and collenchyma, greater leaf blade thickness, absence of lower palisade parenchyma in the mature leaves and a higher number of cavities with essential oils than in younger ones. Changes in anatomical characteristics that could reduce the susceptibility of older E. grandis leaves to A. psidii coincide with the time of developing leaf resistance. Reduced infection of this pathogen in older plants appears to be associated with a more rapid maturation of their leaf tissues. MDPI 2023-01-12 /pmc/articles/PMC9867522/ /pubmed/36679066 http://dx.doi.org/10.3390/plants12020353 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Furtado, Edson Luiz
da Silva, André Costa
Silva, Érica Araújo Rodrigues
Rodella, Roberto Antônio
Soares, Marcus Alvarenga
Serrão, José Eduardo
de Pieri, Cristiane
Zanuncio, José Cola
Morphoanatomical Changes in Eucalyptus grandis Leaves Associated with Resistance to Austropuccinia psidii in Plants of Two Ages
title Morphoanatomical Changes in Eucalyptus grandis Leaves Associated with Resistance to Austropuccinia psidii in Plants of Two Ages
title_full Morphoanatomical Changes in Eucalyptus grandis Leaves Associated with Resistance to Austropuccinia psidii in Plants of Two Ages
title_fullStr Morphoanatomical Changes in Eucalyptus grandis Leaves Associated with Resistance to Austropuccinia psidii in Plants of Two Ages
title_full_unstemmed Morphoanatomical Changes in Eucalyptus grandis Leaves Associated with Resistance to Austropuccinia psidii in Plants of Two Ages
title_short Morphoanatomical Changes in Eucalyptus grandis Leaves Associated with Resistance to Austropuccinia psidii in Plants of Two Ages
title_sort morphoanatomical changes in eucalyptus grandis leaves associated with resistance to austropuccinia psidii in plants of two ages
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9867522/
https://www.ncbi.nlm.nih.gov/pubmed/36679066
http://dx.doi.org/10.3390/plants12020353
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