Vessel anatomical features of ‘Picual’ and ‘Frantoio’, two olive cultivars different in resistance against verticillium wilt of olive
Autor
Santos-Rufo, Antonio
Molina-Molina, Martín
Alcántara-Vara, Esteban
Weiland-Ardáiz, Carlos
López Escudero, Francisco Javier
Editor
MDPIFecha
2023Materia
Anatomy‘Frantoio’
Olea europaea
‘Picual’
Verticillium dahliae
Verticillium wilt of olive
Xylem vessels
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The olive tree (Olea europaea), a non-tropical woody crop that occupies the largest area in the world, is severely affected by the fungus Verticillium dahliae worldwide. In this regard, there is currently detailed information on the level of resistance to this pathogen in the main olive varieties. However, there is little information on quantitative aspects of its anatomy and on the existence of anatomical differences between varieties that could be related to the differential resistance response observed. In the present work, a quantitative study of the xylem of ‘Picual’, susceptible, and ‘Frantoio’, resistant, to V. dahliae is carried out. This study also provides quantitative data on the xylem in different areas of the plant, an aspect on which there is not much information for the olive tree. Among the parameters evaluated, it is probably the greater conductive capacity in the xylem tissue that ‘Frantoio’ presents, mainly due to the greater density of its vessels, which has a more relevant role in the resistance and natural recovery that this cultivar manifests to the disease. In any case, these constitutive anatomical differences, and those others that can be induced in plants during infections, should be investigated in future work that includes inoculation with the pathogen.