Plant–pathogen interactions: leaf physiology alterations in poplars infected with rust (<i>Melampsora medusae</i>)

Rust produced by <i>Melampsora</i> sp. is considered one of the most relevant diseases in poplar plantations. Growth reduction in poplar plantations takes place because rust, like other pathogens, alters leaf physiology. There is not a complete evaluation of several of the physiological...

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Detalles Bibliográficos
Autores principales: Gortari, Fermín, Guiamet, Juan José, Graciano, Corina
Formato: Articulo
Lenguaje:Inglés
Publicado: 2018
Materias:
Ciencias Naturales
Ciencias Agrarias
leaf hydraulic conductance
photosynthesis
plant–pathogen interaction
Populus deltoides
stomatal conductance
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/131925
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-131925
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Ciencias Agrarias
leaf hydraulic conductance
photosynthesis
plant–pathogen interaction
Populus deltoides
stomatal conductance
spellingShingle Ciencias Naturales
Ciencias Agrarias
leaf hydraulic conductance
photosynthesis
plant–pathogen interaction
Populus deltoides
stomatal conductance
Gortari, Fermín
Guiamet, Juan José
Graciano, Corina
Plant–pathogen interactions: leaf physiology alterations in poplars infected with rust (<i>Melampsora medusae</i>)
topic_facet Ciencias Naturales
Ciencias Agrarias
leaf hydraulic conductance
photosynthesis
plant–pathogen interaction
Populus deltoides
stomatal conductance
description Rust produced by <i>Melampsora</i> sp. is considered one of the most relevant diseases in poplar plantations. Growth reduction in poplar plantations takes place because rust, like other pathogens, alters leaf physiology. There is not a complete evaluation of several of the physiological traits that can be affected by rust at leaf level. Therefore, the aim of this work was to evaluate, in an integrative way and in the same pathosystem, which physiological processes are affected when <i>Populus deltoides</i> Bartr. ex Marsh. leaves are infected by rust (<i>Melampsora medusae Thümen</i>). Leaves of two clones with different susceptibility to rust were analyzed. Field and pot experiments were performed, and several physiological traits were measured in healthy and infected leaves. We conclude that rust affects leaf mesophyll integrity, and so water movement in the leaf in liquid phase is affected. As a consequence, gas exchange is reduced, affecting both carbon fixation and transpiration. However, there is an increase in respiration rate, probably due to plant and fungal respiration. The increase in respiration rate is important in the reduction of net photosynthetic rate, but also some damage in the photosynthetic apparatus limits leaf capacity to fix carbon. The decrease in chlorophyll content would start later and seems not to explain the reduction in net photosynthetic rate. Both clones, although they have different susceptibility to rust, are affected in the same physiological mechanisms.
format Articulo
Articulo
author Gortari, Fermín
Guiamet, Juan José
Graciano, Corina
author_facet Gortari, Fermín
Guiamet, Juan José
Graciano, Corina
author_sort Gortari, Fermín
title Plant–pathogen interactions: leaf physiology alterations in poplars infected with rust (<i>Melampsora medusae</i>)
title_short Plant–pathogen interactions: leaf physiology alterations in poplars infected with rust (<i>Melampsora medusae</i>)
title_full Plant–pathogen interactions: leaf physiology alterations in poplars infected with rust (<i>Melampsora medusae</i>)
title_fullStr Plant–pathogen interactions: leaf physiology alterations in poplars infected with rust (<i>Melampsora medusae</i>)
title_full_unstemmed Plant–pathogen interactions: leaf physiology alterations in poplars infected with rust (<i>Melampsora medusae</i>)
title_sort plant–pathogen interactions: leaf physiology alterations in poplars infected with rust (<i>melampsora medusae</i>)
publishDate 2018
url http://sedici.unlp.edu.ar/handle/10915/131925
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