DIFFERENCES IN GERMINATION AND FLOODING TOLERANCE AMONG CORN VARIETIES
Autores
Daniela Marques Correia
Department of Agricultural and Environmental Engineering, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil, e-mail: danedmc@gmail.com
Ramonn Diego Barros de Almeida
Jóice Azeredo Silva
Natália Fernandes Rodrigues
Vitor Francisco Ferreira
Departamento de Tecnologia Farmacêutica, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil, e-mail: vitorferreira@id.uff.br
Leonardo da Silva Hamacher
Science Technology and Innovation in Agriculture, Universidade Federal Rural do Rio de Janeiro, Rio de Janeiro, Brazil, e-mail: lshamacher@id.uff.br
Roberta Jimenez de Almeida Rigueira
Department of Agricultural Engineering, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil, e-mail: rjarigueira@id.uff.br
Carlos Rodrigues Pereira
Department of Agricultural and Environmental Engineering, Laboratório de Interação Planta-Ambiente, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil, crpereira@id.uff.br
The present study sought to identify and evaluate the Germination Speed Index (GSI), the differences in growth and pigments in the hybrids Agroceres® (Hybrid AG 8780) and Pioneer® (Hybrid 30F53VYHR) submitted to stress by flooding in the vegetative stage. Two tests were carried out: in Trial I it was verified the GSI in both varieties, where it was found a higher germination tax and velocity for the variety Agroceres® (Hybrid AG8780). In Trial II, the plants that originated from Trial I were imposed to stress by flooding. From 3 DAF (Days After Flooding) it was evaluated: NDVI (Normalized Difference Vegetation Index), height, diameter of stem and visual analysis and, in the end of Trial II it was evaluated the photosynthetic pigment content. In the analysis of growth and photosynthetic pigment content, it was possible to verify that the Pioneer® (Hybrid 30F53VYHR) variety presented a better performance, with less variations when compared to the plants in control treatment, being more suitable for situations of stress by flooding.
