Vol. 7, Issue 3 (2019)
Nematode-fungi interaction on growth parameter and biochemical changes on tomato
Author(s): Arshad Husain, MR Khan, SK Biswas and Gufran Ahmad
Abstract: Nematode -fungi interaction on growth parameters and severity of disease on tomato revealed that among the different inoculation combination, nematode inoculate prior to fungus (N→F) was most destructive, followed by simultaneously inoculation of fungus and nematode (F+N). In alone treatment, P. aphanidermatum was found most damaging and reduced the length by 32 and 28%, fresh weight 69 and 76% and dry weight 82 and 60% of shoot and root, respectively over control. Whereas in the sequential treatments, where fungal pathogen was inoculated 3 days before nematode inoculation (F→N), all pathogens significantly decreased the plant growth parameters and they were at par with the alone /single inoculation treatment. Among the all treatments, F. o. f. sp. lycopersici with M. incognita was recorded most destructive treatment and reduced the length 50 and 32%, fresh weight 72 and 76%, and dry weight 86 and 61% of shoot and root, respectively over control. Among the simultaneously inoculated treatments (F+N), combination of P. aphanidermatum + M. incognita was recorded most destructive and reduced the number of flower / plant (75%) and weight of fruits/ plant (72 %) compared to un- inoculated control plant. Biochemical assay of total phenol and salicylic acid contents also revealed that increase concentrations of both the chemicals were found in inoculated plants than the un-inoculated plants. In alone treatment, inoculation of P. aphanidermatum caused maximum increased in total phenolic contents (60%,) compared to un-inoculated control. Among the simultaneous treatments, combination of P. aphanidermatum + M. incognita was increased of total phenolic contents by 52%, followed by R, solani+ M. Incognita (47%) compared to un- inoculated control. Similarly, the maximum increased per cent of salicylic acid was recorded in P. aphanidermatum with M. incognita as 24% in compared to un- inoculated control. F. oxysporum f. sp. lycopersici with M. incognita treatment caused least increase in Salicylic acid content (14%). Among the simultaneous treatments (F+N) combination of P. aphanidermatum + M. incognita was recorded highest deceased in Salicylic acid content (37%) followed by F. oxysporum f. sp. lycopersici +M. incognita decreased Salicylic acid content (28%) in compared to un- inoculated control.
How to cite this article:
Arshad Husain, MR Khan, SK Biswas and Gufran Ahmad. Nematode-fungi interaction on growth parameter and biochemical changes on tomato. International Journal of Chemical Studies. 2019; 7(3): 33-39.