Abstract
Non-thermal energy sources have been utilized to control diseases and boost the physiological quality of maize seeds. The aim of this paper was to assess the impact of UV-c exposure and ozone application, associated or not, on organic maize seed germination and seedling vigor. Three cultivars (BRS Caimbé, BRS 1060 and BR 451), three exposure levels to ozone (15, 30 and 60 minutes) in the absence and presence of ultraviolet radiation (UV-c), were used in a completely randomized design with a factorial scheme of 3 x 3 x 2 + 3 (additional treatments) experiment. Evaluations of electrical conductivity, emergence in soil, and germination (at 4th and 7th day) on paper roll were done. Daily measurements of the emerged seedlings were taken up to the 14th day after emergence. The measurements included total emergence (EC), coefficient of variation in emergence time (CVt) in percentage, coefficient of emergence velocity (CVe) in percentage, emergence rate index (ERI) in days, and emergence synchronization index (Z). The tested genotypes caused differences in all studied variables. Increasing the percentage with a 30-minute exposure to ozone in the presence of UV-C radiation resulted in a validated enhance in the first germination reading. The association of O3 and UV-c techniques can be used to treat organic maize seeds without significantly affecting their physiological quality.
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Claims 3
Claim · model-written summary
The tested maize genotypes differed in every studied variable.
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The tested genotypes caused differences in all studied variables”
t0“organic maize seeds”
Claim · model-written summary
Thirty minutes of ozone with UV-C enhanced the first germination reading.
- Treatment
- 30-minute exposure to ozone in the presence of UV-C radiatione0
- Outcome
- first germination readinge0
- Direction
- enhancee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a 30-minute exposure to ozone in the presence of UV-C radiation resulted in a validated enhance in the first germination reading”
t0“organic maize seeds”
Claim · model-written summary
Combined ozone and UV-C treatment did not significantly affect maize seed physiological quality.
- Treatment
- association of O3 and UV-c techniquese0
- Outcome
- physiological qualitye0
- Direction
- without significantly affectinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The association of O3 and UV-c techniques can be used to treat organic maize seeds without significantly affecting their physiological quality”
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