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Speakers - Moacir Forim

Type of the Presentation: (Short lecture)

 

CHEMICAL AND BEHAVIORAL PROFILE ANALYSES OF RESISTANT AND SUSCEPTIBLE VEGETABLE GENOTYPES TO THE ARTHROPOD IN THE IDENTIFICATION OF CONSTITUTIVE DEFENSE SYSTEMS

 

Moacir Forim1,*, Erika Pereira1, Flavia Aquino1, Alany Ribeiro1, Maria Fátima da Silva1, João Fernandes1, Wellington Eduardo2, Arlindo L Boiça-Junior2, Bruno de Souza3

 

1  Universidade Federal de São Carlos, Rod. Washington Luiz, km 235, CEP 13.565-090, São Carlos-SP, Brazil. *Correspondence: mrforim@ufscar.br

2  Universidade Estadual Paulista, Câmpus Jaboticabal, Faculdade de Ciências Agrárias e Veterinárias, Via de Acesso Prof. Paulo Donato Castelane, S/N CEP 14884-900 Jaboticabal-SP, Brazil

3  Universidade Federal de Lavras, Av. Doutor Sylvio Menicucci, 1001 - Kennedy, CEP 37200-000, Lavras-MG, Brazil.

 

Plants have been under constant and sometimes intense pressure by several abiotic and biotic stresses, among which the arthropod herbivores are an important type. Through this continuous and selective pressure on plant evolution over in its history in the plant kingdom, it is not surprising that plants have developed a complex array of defense mechanisms. These strategies can be divided into two categories where one is present (constitutive), while others are inducible, coming into operation following insect attack. Moreover, some genotypes of the same vegetable species do not express defense mechanisms at least constitutive. Once herbivore bites into, or it pierces the plant, they may start a world where chemical defenses abound. Two criteria must be met for a plant (e.g., production of a particular chemical) to be considered with defensive mechanism. First, the chemical compound must affect the extent to which a plant is attacked, and second, plants possessing the attribute (plants with induced or constitutive defense) must have greater fitness than plants without it or with smaller amounts of it (plants without defense mechanisms). Once a vegetable species can have diverse genotypes that present resistance, or not (susceptible) to arthropods, the choose of one to be cultivated can present fundamental different consequences for populations of predators, or parasites in ecological and evolutionary time. In doing so, the correct choice of genotypes with expressed defense mechanisms have the potential to regulate herbivore populations not only decreasing the agrochemical consumptions in the food productions, but also providing new tools in a holistic approach to sustainable agriculture in Integrated Crop Management (ICM) systems. In this context, our research group have been working to increase the knowledge of the chemical ecology between plants and insects through the identification, and overlap of data of chemical profiles of constitutive defense systems and insect behaviors. Therefore, in this work we are highlighting the constitutive defense systems of plants. We are going to talk about new instrumental tools and software available to study the chemical profile of vegetable such as UPLC-MS/MS and MSE, HPLC-DAD-NMR, GC×GC-MS/MS, MALDI-TOF MS, etc.