Bioinoculants and organic amendments affect nematode diversity in apple orchards

Description

Nematodes have versatile lifestyles and provide a suitable lens to decipher the ecosystem conditions. Here, 18S rDNA metabarcoding was employed to study the effect on the nematode composition of arbuscular mycorrhizal fungi, bioeffector, and organic amendments in apple orchards, which were sampled during spring and autumn. Sampling time more than treatment had a significant effect on the nematode diversity and composition, and higher alpha-diversity indices were observed during spring as compared to autumn. Although treatments were able to reduce nematode richness and diversity, their effects varied. The composition of bacterivorous and herbivorous nematodes showed seasonal variations, and a higher number of bacterivorous- as compared to herbivorous- nematodes seen during spring. The composition of nematode trophic guilds was driven by dominant families like Rhabditidae and Tylenchidae. Nematode-based indices like structure and enrichment indices revealed maturing and moderately disturbed soils for the two apple orchards; and maturity- and plant parasite- indices were generally low. This indicates potential soil nutrient enrichment in the two different orchards resulting in high primary productivity for the herbivorous nematodes. Our study provides insights into the effect of soil treatment on nematode, with implications for the development and modification of bioinoculants, as well as the potential to improve the soil ecosystem services.

Period	20 Aug 2023 → 25 Aug 2023
Event title	12th International Congress of Plant Pathology
Event type	Conference
Location	Lyon, FranceShow on map
Degree of Recognition	International