Induction of resistance in tomato plants against tomato mosaic tobamovirus using beneficial microbial isolates.
The possibility of making use of the phenome non of Systemic Acquired Resistance (SAR) to control viruses achieved by the soaking treatment of tomato seeds cv. Castl Rock with three growth forms to Bacillus circulans, Pseudomonas fluorescens 2 and Trichoderma harzianum against Tomato mosaic tobamovirus (ToMV) infection. All the application forms of beneficial biotic inducers were reduced the mean number of ToMV local lesions on Datura metel. P. fluorescens 2 was found to be the best treatment in three forms on reduction of local lesion number 42.2, 32.7 and 38.1 of microbial liquid culture, microbial cells or spores and microbial culture filtrate forms, respectively, while the highest mean numbers of local lesions were 51.5, 61.7 and 73.5 of microbial liquid culture, microbial cells or spores and microbial culture filtrate, respectively for T. harzianum. The microbial culture filtrate form was more effective than other microbial forms to reduce mean number of ToMV local lesions to B. circulans, P. fluorescens 2 and T. harzianum isolates, 40.7, 32.1 and 51.5, respectively. The individual microbial isolates on all three microbial forms able to vary ToMV local lesions similarity (homologous or heterologous) and morphology (size center and surrounded with halo or without halo) compared with TMV mother strain.
Department of Plant pathology, National Research Centre, Dokki, Cairo, Egypt.
A A
AA
Megahed
Department of Agriculture Microbiology, Faculty of Agriculture, Ain Shams University, Shoubra EL-Kheima, Cairo, Egypt.
Kh A
KhA
El-Dougdoug
Department of Agriculture Microbiology, Faculty of Agriculture, Ain Shams University, Shoubra EL-Kheima, Cairo, Egypt.
B A
BA
Othman
Department of Plant pathology, National Research Centre, Dokki, Cairo, Egypt.
S M
SM
Lashin
Department of Molecular Biology, Genetic Engineering and Biotechnology Division, National Research Centre, Dokki, Cairo, Egypt.
M A
MA
Ibrahim
Department of Botany and Microbiology, Faculty of Science, Al-Azhar University, 11884 Nasr City, Cairo, Egypt.
A R
AR
Sofy
D001407:Bacillus / Q000145:classification / Q000254:growth & development*; D058448:Biota; D054884:Host-Pathogen Interactions; D018551:Solanum lycopersicum / Q000382:microbiology* / Q000821:virology*; D010935:Plant Diseases / Q000382:microbiology / Q000517:prevention & control* / Q000821:virology; D018515:Plant Leaves / Q000382:microbiology / Q000821:virology; D011551:Pseudomonas fluorescens / Q000254:growth & development*; D012639:Seeds / Q000382:microbiology / Q000821:virology; D017898:Tobamovirus / Q000472:pathogenicity*; D014242:Trichoderma / Q000254:growth & development*