Defence cascade in Verticillium-infected grafted tomato.

In tomato the Ve1-gene provides resistance to the vascular pathogen, Verticillium dahliae, race 1; ve1 plants are susceptible. Reciprocal grafts of resistant and susceptible tomato near-isolines were used to examine proteomic changes and, in particular, the effect of the Ve1-gene on the defence/stress protein cascade induced during Verticillium wilt. Based on label-free LC-MS, the results indicate that this defence response is cell-specific, correlates with overall fungal colonization and is mitigated by Ve1 function.

Tomato Ve resistance locus; defense or growth.

Verticillium colonization does induce a cascade of defense/stress proteins but the Ve1 gene also promotes enhanced root growth, which appears to allow the plant to outgrow the pathogen and avoid symptoms associated with an exaggerated defense response. In tomato, the Ve1 gene provides resistance to the vascular pathogen, Verticillium dahliae, race 1; ve1 plants are susceptible. However, the physiological basis of the resistance is unknown.

Arsenal of elevated defense proteins fails to protect tomato against Verticillium dahliae.

Although the hypersensitive reaction in foliar plant diseases has been extensively described, little is clear regarding plant defense strategies in vascular wilt diseases affecting numerous economically important crops and trees. We have examined global genetic responses to Verticillium wilt in tomato (Lycopersicon esculentum Mill.) plants differing in Ve1 resistance alleles.

Endophyte-induced Verticillium protection in tomato is range-restricted.

Endophytes, bacterial, fungal or viral, colonize plants often without causing visible symptoms. More important, they may benefit host plants in many ways, most notably by preventing diseases caused by normally virulent pathogens. Previous studies have shown that an isolate of V.

Plant-endophyte interplay protects tomato against a virulent Verticillium.

Endophytes, bacterial, fungal or viral, colonize plants often without causing visible symptoms. More important, they may benefit host plants in many ways, most notably by preventing diseases caused by normally virulent pathogens. Craigella tomatoes (Lycopersicon esculentum Mill.