Ultrastructural changes during early infection of Vigna unguiculata and Phaseolus vulgaris leaves by Xanthomonas axonopodis pv. phaseoli and an unexpected association between chloroplast and mitochondrion

Common bacterial blight, caused by Xanthomonas axonopodis pv. phaseoli, is an important disease affecting beans causing considerable yield losses in many producing areas. Our aim was to investigate Xap–beans interactions in the first 48 h after infection analyzing structurally relevant changes by el...

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Bibliographic Details
Published in:Acta physiologiae plantarum 2011-09, Vol.33 (5), p.2025-2033
Main Authors: de O. Carvalho, André, Da Cunha, Maura, Rodrigues, Rosana, Sudré, Cláudia P, Santos, Izabela S, Fernandes, Kátia V. S, Rabelo, Guilherme R, Gomes, Valdirene M
Format: Article
Language:English
Subjects:
Agriculture
bacterial diseases of plants
beans
Biomedical and Life Sciences
blight
bundle sheath cells
chloroplasts
host-pathogen relationships
leaves
Life Sciences
mitochondria
parenchyma
Phaseolus vulgaris
Plant Anatomy/Development
Plant Biochemistry
Plant Genetics and Genomics
plant morphology
Plant Pathology
Plant Physiology
scanning electron microscopy
Short Communication
transmission electron microscopy
Vigna unguiculata
Xanthomonas axonopodis
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Summary:Common bacterial blight, caused by Xanthomonas axonopodis pv. phaseoli, is an important disease affecting beans causing considerable yield losses in many producing areas. Our aim was to investigate Xap–beans interactions in the first 48 h after infection analyzing structurally relevant changes by electron microscopy. Scanning electron microscopy analysis demonstrated morphological changes on leaf surfaces of both species. Transmission electron microscopy showed different types of chloroplast structural disorganization in both parenchyma and bundle sheath cells of Vigna unguiculata which were only observed in parenchyma cells of Phaseolus vulgaris. Additionally, we report an unexpected physical association between the chloroplasts and mitochondria observed only to P. vulgaris-infected plants.
ISSN:0137-5881
1861-1664
DOI:10.1007/s11738-011-0726-8