期刊
COLLOIDS AND SURFACES B-BIOINTERFACES
卷 157, 期 -, 页码 280-285出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfb.2017.05.063
关键词
Atmospheric plasma; DBD; Seed dormancy; Impermeable integument
资金
- CNPq
- CAPES
In this study, we analyzed seed wettability as well as imbibition and germination after treatment with atmospheric pressure cold plasma (APCP) using dielectric barrier discharge (DBD) in seeds that have very low germination rates. To aid industrial applications, several seeds were simultaneously treated with plasma within a space between two coaxial glass tubes sandwiched by two metal mesh screens that produced high-voltage pulses at 17.5 kV with a frequency of 990 Hz. Three treatment times (3 min, 9 min and 15 min) as well as untreated seeds were used to conduct the wettability, imbibition and germination tests. The wettability and imbibition were found to be directly related to the treatment duration, but saturation of the imbibition was found for treatment durations greater than 9 min. Plasma treatment was also effective in improving germination, but shorter treatment duration presented greater germination. This apparent contradiction is explained by the cell damage caused by the increased exposure to plasma, as observed in other studies. The results suggest that there must be an optimal wettability and imbibition condition that ensures that excessive moisture does not harm the germination process. (C) 2017 Elsevier B.V. All rights reserved.
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