Autoria: OLIVEIRA, G. M. de; ANGELOTTI, F.; MARQUES, E. J. N.; SILVA, F. F. S. da; PELACANI, C. R.; DANTAS, B. F.

Resumo: The seed physiological quality is related with climate variation during development. Thus, the aim of this study was to determinate the relation among climatic factors and germination of M. urundeuva seeds in different growing seasons and to predict the germination according to the climatic scenarios. Seeds from 14 crop seasons (2005 to 2018) and climatic data from the ?Bebedouro? weather station (Embrapa Semiarid) were used to determine the influence of climatic conditions on the vegetative, female and male flowers and the fruiting of M. urundeuva. The simple linear correlation and the multiple linear regression model were applied to determine the influence of climatic elements on the production of M. urundeuva seeds. The multivariate calibration model was developed using the previous selection of variables by the algorithm of successive projections. From the mathematical model, the germination of M. urundeuva seeds was predicted according to climate change, as provided by the IPCC. Seed germination showed a significant difference between harvests. Through the correlation it was observed that the temperature correlated negatively with all phenological phases of M. urundeuva. The quality of M. urundeuva seeds is related to the maximum, average and minimum temperature, average and minimum humidity, and precipitation. These climate variables during the different phenological phases of M. urundeuva affect the physiological quality of the seeds, and, in climate change scenarios, there will be a reduction in the seed production of this species.

Ano de publicação: 2020

Tipo de publicação: Artigo de periódico

Unidade: Embrapa Semiárido

Palavras-chave: Aroeira-do-sertão, Bioma Caatinga, Climate change, Fisiologia, Germinação, Mudança Climática, Myracrodruon Urundeuva, Semente