PT  - JOURNAL ARTICLE
AU  - Robert G. Linderman
AU  - E. Anne Davis
TI  - Comparative Response of Selected Grapevine Rootstocks and Cultivars to Inoculation with Different Mycorrhizal Fungi
AID  - 10.5344/ajev.2001.52.1.8
DP  - 2001 Jan 01
TA  - American Journal of Enology and Viticulture
PG  - 8--11
VI  - 52
IP  - 1
4099  - http://www.ajevonline.org/content/52/1/8.short
4100  - http://www.ajevonline.org/content/52/1/8.full
SO  - Am J Enol Vitic.2001 Jan 01; 52
AB  - The need to replant vineyards due to the impact of phylloxera and other root disease problems has led to practices of soil fumigation that generally eliminate beneficial microbes like vesicular-arbuscular mycorrhizal (VAM) fungi. Replanting is done with cultivars grafted on nematode-and phylloxera-resistant rootstocks or with own-rooted cultivars. The question of the relative responsiveness of a selection of these rootstocks or cultivars to several VAM fungal species prompted this study. The tests, conducted under low phosphate (14 mg kg-1 available) conditions, revealed that all rootstocks and cultivars exhibited significantly increased growth in response to inoculation with VAM fungi. The degree of responsiveness varied, depending on the plant genotype and fungal species used. Noninoculated plants were clearly stunted and showed foliar symptoms of undetermined nutrient deficiencies, thus confirming the high dependence of grapevines on VAM. Based on these results, it would be expected that vines planted in soils lacking VAM fungi, due to fumigation or terracing that exposes poor soils, would be highly responsive to VAM colonization.