Published in Scientific Papers. Series B, Horticulture, Volume LXI
Written by Nadejda MIHNEA, Galina LUPAŞCU, Irina ZAMORZAEVA
The paper presents results of the reaction of new tomato varieties and perspective lines created in the Institute of Genetics, Physiology and Plant Protection to the seeds treatment with FC Fusarium oxysporum, F. solani, F. redolens, Alternaria alternata based on the estimation of seeds germination and length of embryonic radicles and stemlets. It should be mentioned that the reaction of some varieties to same isolates was quite different. Thus, in the case of seeds germination the capability of some approved varieties after treating them with FC of fungi, the highest resistance was found for varieties 'Exclusiv’, 'Desteptarea’, 'Milenium’. Variety 'Mihaela’ has demonstrated the highest complex resistance to FC of 4 used fungi in the case of the reaction of radicles and stemlets, the phenomenon was manifested as insignificant reduction or stimulation. Using bifactorial analysis of variance we found that the most contribution to the variation of embryonic radicle and stemlet length had the species of fungus, being 41.07 and 58.58%, respectively. It should be mentioned that the genotype plays an important role too, its factorial pondering consists of the 32.49 and 22.00%, respectively, for the length of radicles and stemlets, and the interaction tomato genotype x fungus species was recorded as 25.03 and 17.73%, respectively, for both characters. The significant pondering of the influence of fungus species (Fusarium spp., A. alternata) and the interaction tomato genotype x species of fungus on the source of variation of plant growth organs reveals the necessity of constant monitoring of the composition of pathogen species and their virulence.
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