Physiological and health quality of angico-vermelho seeds on seedling initial growth

• Main Authors: Julia Maldonado Berloffa, Felipe André Sganzerla Graichen, Fernando Montezano Fernandes, Auigner Ruis Dias da Silva
• Format: Article
• Language: English
• Published: Universidade do Estado de Mato Grosso 2015-12-01
• Series: Revista de Ciências Agroambientais
• Subjects: Anadenanthera peregrine; Speg; biological control; chemical control; seed borne pathogens
• Online Access: http://periodicos.unemat.br/index.php/rcaa/article/view/1187

The aim of this study was to evaluate the effect of treatments to control fungi associated with the seeds of angico-vermelho, and its influence on the early development of seedlings. The seeds were collected in two different situations, already fallen on the ground or in still closed vegetables and attached to the plant.The analysis was performed on seeds with no treatment and seeds treated with sodium hypochlorite (NaClO) 1% for one minute, sodium hypochlorite 2%for 10 minutes, fungicide Standak Top®, bio control with Trichoderma asperellum and immersion in hot water, in which the seeds were soaked for 10 minutes in water at 45°C and then immersed in water at 50°C with 15 minute forced circulation for.Besides evaluating seeds health, germination rate, germination speed index (GSI) and the degree of seeds maturation in a growth chamber, we also evaluated in greenhouse variables related to the production of seedlings as emergency and the emergency speed index (ESI), height and mass of the seedlings. The experiments were conducted in factorial scheme 2x6 (collection of seeds x antifungal treatments. The fungal genera Aspergillus, Colletotrichum, Curvularia, Fusarium, Penicillium and Rhizopus were identified associated with the seeds. The seeds collected from vegetables still closed attached to the plant showed a higher percentage of germination and GSI. Germination was the only variable that showed a significant difference regarding the treatments. The use of fungicidal Standak Top® promoted lower fungal incidence, however it reduced the germination of the seeds when compared to the untreated seed. Yet the use of biological control proved to be effective for controlling, without showing difference of germination in comparison to the untreated seeds.