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Characterization and pathogenicity of fungal trunk pathogens associated with declining of neem (Azadirachta indica A. Juss) trees in Iran
- Source :
- Journal of Plant Pathology. 102:1159-1171
- Publication Year :
- 2020
- Publisher :
- Springer Science and Business Media LLC, 2020.
-
Abstract
- Neem (Azadirachta indica A. Juss.) tree is an important and valuable forestry species and is also ideal for reforesting programs in some countries. Several field surveys were conducted on neem trees in different landscapes in Bandar Abbas (Hormozgan province, southern coast of Iran) to determine fungal species associated with trunk diseases. Wood samples were collected from branches of trees planted in boulevards, public parks, local streets, sidewalks and roadsides with yellowing, defoliation, dieback, canker, gummosis and internal wood discoloration. Fungal isolations were made from discolored wood tissues on potato-dextrose agar supplemented with 0.5 g/L of streptomycin sulphate. Fungal isolates obtained from neem trees, were identified based on morphological characteristics and DNA sequence comparisons. Curvularia hawaiiensis, Neoscytalidium hyalinum, Lasiodiplodia theobromae, Paecilomyces formosus, Paecilomyces dactylethromorphus, Phaeoacremonium venezuelense, P. angustius, P. minimum, P. rubrigenum, P. parasiticum and Pleurostoma richardsiae were the main fungal species recovered from neem trees showing disease symptoms. Pathogenicity of selected species was verified by inoculation of shoots of neem trees under controlled conditions. Neoscytalidium hyalinum was the most aggressive species based on the length of vascular necrosis in the wood. All fungal species, with exception of L. theobromae, are reported here for the first time on neem trees.
- Subjects :
- 0106 biological sciences
0301 basic medicine
Canker
Gummosis
Inoculation
Plant Science
Biology
Azadirachta
medicine.disease
Pathogenicity
biology.organism_classification
01 natural sciences
03 medical and health sciences
Horticulture
030104 developmental biology
Shoot
medicine
Paecilomyces
010606 plant biology & botany
Lasiodiplodia theobromae
Subjects
Details
- ISSN :
- 22397264 and 11254653
- Volume :
- 102
- Database :
- OpenAIRE
- Journal :
- Journal of Plant Pathology
- Accession number :
- edsair.doi...........00e3f170cf9dccd62d3d9cfdcc2361f2