Pocurull Miriam, Fullana Aïda M, Ferro Miquel, Valero Pau, Escudero Nuria, Saus Ester, Gabaldón Toni, Sorribas F Javier
Department of Agri-Food Engineering and Biotechnology, Universitat Politècnica de Catalunya, Barcelona, Spain.
Bioinformatics and Genomics Program, Centre for Genomic Regulation, Barcelona Institute of Science and Technology, Barcelona, Spain.
Front Microbiol. 2020 Jan 31;10:3042. doi: 10.3389/fmicb.2019.03042. eCollection 2019.
is the most damaging plant parasitic nematode genus affecting vegetable crops worldwide. The induction of plant defense mechanisms against in tomato by some spp. strains has been proven in pot experiments, but there is no information for tomato bearing the resistance gene or for other important fruiting vegetable crops. Moreover, is mostly applied for managing fungal plant pathogens, but there is little information on its effect on nematode-antagonistic fungi naturally occurring in soils. Thus, several experiments were conducted to determine (i) the ability of two commercial formulates of (T34) and (T22) to induce systemic resistance in tomato and cucumber against an avirulent population in split-root experiments; (ii) the effect of combining T34 with tomato carrying the resistance gene to an avirulent population in sterilized soil; and (iii) the effect of combining T34 with tomato carrying the resistance gene to a virulent population in two suppressive soils in which is naturally present, and the effect of T34 on the level of egg parasitism. Both formulates induced resistance to in tomato but not in cucumber. In tomato, the number of egg masses and eggs per plant were reduced by 71 and 54% by T34, respectively. T22 reduced 48% of the number of eggs per plant but not the number of egg masses. T34 reduced the number of eggs per plant of the virulent population in both resistant and susceptible tomato cultivars irrespective of the suppressive soil, and its effect was additive with the resistance gene. The percentage of fungal egg parasitism by was not affected by the isolate T34 of .
是全球影响蔬菜作物最具破坏力的植物寄生线虫属。在盆栽试验中已证明一些种的菌株可诱导番茄对的植物防御机制，但对于携带抗性基因的番茄或其他重要的结果蔬菜作物尚无相关信息。此外，主要用于防治植物真菌病原体，但关于其对土壤中自然存在的线虫拮抗真菌的影响信息很少。因此，进行了几项实验以确定：（i）在分根实验中，两种商业制剂（T34）和（T22）诱导番茄和黄瓜对无毒种群产生系统抗性的能力；（ii）在无菌土壤中将T34与携带抗性基因的番茄结合对无毒种群的影响；（iii）在两种自然存在的抑制性土壤中将T34与携带抗性基因的番茄结合对有毒种群的影响，以及T34对卵寄生水平的影响。两种制剂均能诱导番茄对的抗性，但不能诱导黄瓜产生抗性。在番茄中，T34使每株植物的卵块数和卵数分别减少了71%和54%。T22使每株植物的卵数减少了48%，但未减少卵块数。无论抑制性土壤如何，T34都能降低抗性和易感番茄品种中有毒种群的每株植物卵数，其效果与抗性基因具有累加性。的真菌卵寄生百分比不受分离株T34的影响。
