Antioxidant activity of corn seeds after thermal stress

作者：Marini Patricia^*; Bandeira Juliana de Magalhaes; Gouvea de Borba Isabel Cristina; Noguez Martins Andrea Bicca; de Moraes Dario Munt; do Amarante Luciano; Villela Francisco Amaral

来源：Ciencia Rural, 2013, 43(6): 951-956.

DOI：10.1590/s0103-84782013005000064

• Zea mays
• temperature
• germination
• growth

The aim of this research was to analyze the effect of different temperatures on physiological quality and relate the responses with the antioxidant activity of three lots of corn seeds. The seeds from three lots were exposed for 24h at temperatures of 15, 25, 35 and 40 degrees C and then evaluated for percentage, speed index and first germination count, as well as early growth and activity of antioxidant enzymes in the seedlings. The experimental design was completely randomized with four replications, with subsequent polynomial regression analysis. The results showed that the seeds from the three lots of corn exposed to temperatures of 15 and 40 degrees C, were of better high physiological quality (vigor), which explains the low activity of enzymes of the antioxidant defense system in these same temperatures. The antioxidant defense system is related to the physiological quality of corn seeds exposed to thermal stress.

• 出版日期2013-6