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Different effects of aluminum on the actin cytoskeleton and brefeldin A-sensitive vesicle recycling in root apex cells of two maize varieties differing in root elongation rate and aluminum tolerance

Amenos, M.(Universitaet Bonn (Germany)) ; Corrales, I ; Poschenrieder, C ; Illes, P ; Baluska, F ; Barcelo, J

Plant and cell physiology, 2009-03, Vol.50 (3), p.528-540 [Periódico revisado por pares]

Japan: Oxford University Press

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Título:
Different effects of aluminum on the actin cytoskeleton and brefeldin A-sensitive vesicle recycling in root apex cells of two maize varieties differing in root elongation rate and aluminum tolerance
Autor: Amenos, M.(Universitaet Bonn (Germany)) ; Corrales, I ; Poschenrieder, C ; Illes, P ; Baluska, F ; Barcelo, J
Assuntos: Actins - metabolism ; ALUMINIO ; ALUMINIUM ; Aluminum ; Aluminum - metabolism ; Aluminum - toxicity ; BORE ; BORO ; BORON ; Brefeldin A ; Brefeldin A - pharmacology ; Cytoskeleton - drug effects ; Cytoskeleton - metabolism ; Endosomes - metabolism ; GENETIC VARIATION ; Maize ; NUCLEOLE ; NUCLEOLOS ; NUCLEOLUS ; PECTINAS ; PECTINE ; PECTINS ; Pectins - metabolism ; Plant Roots - cytology ; Plant Roots - drug effects ; Plant Roots - metabolism ; TOLERANCE ; TOLERANCIA ; VARIACION GENETICA ; VARIATION GENETIQUE ; Vesicle trafficking ; ZEA MAYS ; Zea mays - drug effects ; Zea mays - metabolism
É parte de: Plant and cell physiology, 2009-03, Vol.50 (3), p.528-540
Notas: F60
F30
H50
2009003949
ArticleID:pcp013
ark:/67375/HXZ-X41HTBXT-X
istex:4C906BF7808F60CC77D644B83CD9E6FB399960D1
Descrição: A relationship between aluminum (Al) toxicity, endocytosis, endosomes and vesicle recycling in the root transition zone has recently been demonstrated. Here the importance of filamentous actin (F-actin)-based vesicle trafficking for Al tolerance has been investigating in maize varieties differing in their Al sensitivities. More Al was internalized into root tip cells of the Al-sensitive variety 16×36 than in the Al-tolerant variety Cateto. The actin cytoskeleton and vesicle trafficking were primary targets for Al toxicity in the root tips of the sensitive variety. Visualization of boron-cross-linked rhamnogalacturonan II (RGII)-containing brefeldin A (BFA) compartments revealed that Al inhibited the formation of these compartments, especially in variety 16×36. The time sequence of Al effects on pectin recycling matches the growth effects of Al in this sensitive variety. These results support the hypothesis that Al binding to pectin-rich cell walls can contribute to reversible inhibition of root elongation. Al-induced alterations on F-actin were most evident in the central part of the transition zone of Al-sensitive 16×36, where Al was localized inside the nucleoli. In relation to this observation, a role for symplastic Al in both irreversible growth inhibition and amelioration of BFA-induced inhibition of root elongation is discussed.
Editor: Japan: Oxford University Press
Idioma: Inglês

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Different effects of aluminum on the actin cytoskeleton and brefeldin A-sensitive vesicle recycling in root apex cells of two maize varieties differing in root elongation rate and aluminum tolerance

Amenos, M.(Universitaet Bonn (Germany)) ; Corrales, I ; Poschenrieder, C ; Illes, P ; Baluska, F ; Barcelo, J

Japan: Oxford University Press

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