Articles
A PRELIMINARY SURVEY OF HAZELNUT (CORYLUS AVELLANA L.) VIRUS-LIKE DISEASE IN PORTUGAL: A CASE STUDY
Article number
845_92
Pages
585 – 590
Language
English
Abstract
Last year, several commercial hazelnut cultivars (Corylus avellana L.) located in the north of Portugal (Felgueiras region) on an antrosoil at 370 m a.s.l. presented an unknown symptomatology.
The local climate can be defined as temperate, with cold winters, mild springs and hot summers of the Mediterranean type.
Rainfall reaches 1300 mm per year, although the summer season is generally dry.
The trial was a rectangular field plot with 245 plants of 26 cultivars, twenty-years-old, spaced 5 × 3 m and trained as a single trunk.
Only recently, 41 trees of different cultivars (Couplat, Grifol, T. G. delle Langhe, Ribet, T. G. Romana, Pauetet, L. dEspagne, Siciliana, Casina, Da Veiga, S. Giovanni and Mortarella), some of them grafted onto Segorbe (just the first six cultivars), located at the centre of the trial, began to show external bark deformations at several branches and at the trunk; the deformations had a rope aspect and no symptoms were evident on the leaves.
This type of bark deformation was also observed on several plants of Camellia japonica near to the hazelnut trial.
The viruses reported on hazelnut cultivars, namely Apple mosaic virus (ApMV), Prunus necrotic ring spot virus (PNRSV) and Tulare apple mosaic virus (TAMV), usually do not induce these symptoms. Apple stem grooving virus (ASGV), which infects apples and citrus and Citrus psorosis virus (CPsV) in citrus, may induce similar deformations mainly in the trunk.
The deformations observed suggest a vascular type of disease that could have a biotic or abiotic origin.
The objective of this work is to identify the causal agent of this virus-like disease or other non-biological cause.
Biological, serological, molecular and electron microscopy studies, as well as nutritional analyses, will be performed.
The local climate can be defined as temperate, with cold winters, mild springs and hot summers of the Mediterranean type.
Rainfall reaches 1300 mm per year, although the summer season is generally dry.
The trial was a rectangular field plot with 245 plants of 26 cultivars, twenty-years-old, spaced 5 × 3 m and trained as a single trunk.
Only recently, 41 trees of different cultivars (Couplat, Grifol, T. G. delle Langhe, Ribet, T. G. Romana, Pauetet, L. dEspagne, Siciliana, Casina, Da Veiga, S. Giovanni and Mortarella), some of them grafted onto Segorbe (just the first six cultivars), located at the centre of the trial, began to show external bark deformations at several branches and at the trunk; the deformations had a rope aspect and no symptoms were evident on the leaves.
This type of bark deformation was also observed on several plants of Camellia japonica near to the hazelnut trial.
The viruses reported on hazelnut cultivars, namely Apple mosaic virus (ApMV), Prunus necrotic ring spot virus (PNRSV) and Tulare apple mosaic virus (TAMV), usually do not induce these symptoms. Apple stem grooving virus (ASGV), which infects apples and citrus and Citrus psorosis virus (CPsV) in citrus, may induce similar deformations mainly in the trunk.
The deformations observed suggest a vascular type of disease that could have a biotic or abiotic origin.
The objective of this work is to identify the causal agent of this virus-like disease or other non-biological cause.
Biological, serological, molecular and electron microscopy studies, as well as nutritional analyses, will be performed.
Publication
Authors
A.P. Silva, A. Assunção, B. Gonçalves, I. Cortez, A.M.N. Pereira
Keywords
deformation trunk, hazelnut, rope symptoms, virus-like
Online Articles (125)