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Induced plant responses in the Bemisia tabaci-tomato system.

AutorNombela, Gloria ; Muñiz, Mariano ; Alonso, D.; Gómez, Azahara A.
Fecha de publicación2006
Citación4th International Bemisia Workshop. Duck Key, Florida (USA)
ResumenSome plants have constitutive barriers against possible attacks by pests or pathogens, and plant resistance is an alternative tool to environmentally toxic insecticides in integrated control. In addition, plants can activate protective mechanisms upon contact with a previous invader. This interesting phenomenon is termed induced or acquired resistance and often protects the plant against a second invasion by the same or another pest or pathogen. On the contrary, the induced responses in the plant could not be necessarily negative to a subsequent invader and could produce beneficial effects to these organisms. It is known that some biological agents such as certain bacteria and fungi can induce plant resistance to other pathogens. However, few investigations have been done to date to evaluate host plant induced responses to piercing-sucking insects in susceptible plants from horticultural crops. Recently, we have demonstrated that plant resistance to whitefly Bemisia tabaci was induced in susceptible tomato plants after infestation by the potato aphid Macrosiphum euphorbiae, but not at the reverse. Now, we present preliminary results from a study to investigate whether plant resistance to B. tabaci (B biotype) could be induced in susceptible tomato plants (cv. Marmande) by a previous infestation with the same insect pest or, on the contrary, whether responses elicited in the plant would enhance suitability to this whitefly species.
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