Procedures for the physiological potential assessment of pepper seeds and relations with the emergence of seedlings. / Procedimentos para avaliação do potencial fisiológico de sementes de pimentão e relações com a emergência de plântulas

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

This study aimed to verify the efficiency of procedures for the physiological potential assessment of pepper seeds and seek to identify its relationship with germination under different temperatures and the emergence of seedlings. In parallel, we performed the analysis of images, obtained with the use of radiation X, seeking to associate the internal morphology of seeds to their performance and to determine possible causes of changes of physiological potential. The study used five seed lots of hybrids Reinger and Sentinel. The evaluation of physiological potential of the seeds was achieved by conducting the germination test, accelerated aging with saturated solution of NaCl (48h/41°C), emergence of seedlings (percentage and speed), the tetrazolium test (3h/45°C for imbibition and 2h/5°C for colouration of seeds) and germination test (percentage and speed) on five tracks of temperature (15°C, 18°C, 21°C, 25°C and 30°C) in thermogradient table. For the X-ray test, radiographed seeds were classified according to the stage of development and morphology of the embryos; after the germination test, the structure of seeds were associated with the respective resulting seedlings/seeds. The accelerated aging test with saturated solution of NaCl and tetrazolium test are appropriate for assessing the physiological potential of pepper seeds, and vigorous lots show good performance under variations of temperature in germination. The X-ray test is effective in identifying damage and abnormalities in the embryo associated with germination of pepper seeds.

ASSUNTO(S)

key words germinação de sementes - vigor sementes - fisiologia. pepper seeds physiology. germination of seeds vigour pimentão

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