Agricultural bioinoculants containing arbuscular mycorrhizal fungi represent a potential opportunity to reduce the dependence of grapevines (Vitis) on agrochemicals. This field study assessed the ability of four commercial bioinoculants to colonize grapevine roots and their effects on petiole nutrient concentration, berry composition, and root morphology of 'Pinot noir' (Vitis vinifera) grafted onto rootstock 'Couderc 3309' (Vitis riparia x Vitis rupestris) and 'Riesling' (V. vinifera) grafted onto 'Couderc 3309' and Selection Oppenheim four (Vitis berlandieri x V. riparia). Three bioinoculants increased root mycorrhizal colonization; however, regardless of the treatment, mycorrhizal fungal structures were enhanced. Grapevine petiole nutrient concentration was improved by bioinoculants. Root diameter, root length density, and specific root length increased with greater mycorrhizal root colonization. Using bioinoculants to reduce chemical fertilizers may be a good strategy to improve grapevine productivity and health in cool climates; however, the impact of mycorrhizal bioinoculants in the vineyard may differ among scion-rootstocks, edaphoclimatic conditions, and vineyard soil microbiomes.
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机译：含有丛枝菌根真菌的农业生物接种剂代表了减少葡萄藤（Vitis）对农用化学品依赖的潜在机会。这项田间研究评估了四种商业生物接种剂在葡萄根系定植的能力，以及它们对嫁接到砧木“Couderc 3309”（Vitis riparia x Vitis rupestris）和嫁接到“Couderc 3309”和Selection Oppenheim 4（Vitis berlandieri x V. riparia）上的“黑皮诺”（Vitis vinifera）的叶柄养分浓度、浆果组成和根系形态的影响。3种生物接种剂增加根菌根定植;然而，无论处理如何，菌根真菌结构都得到了增强。生物接种剂提高了葡萄叶柄养分浓度。根径、根长密度和比根长随着菌根根定植的增加而增加。在凉爽的气候下，使用生物接种剂减少化肥可能是提高葡萄生产力和健康的好策略;然而，菌根生物接种剂对葡萄园的影响可能因接穗砧木、气候条件和葡萄园土壤微生物群落而异。
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