Abstract
A b s t r a c t. The paper presents a study on the effects of low intensity laser irradiation on field performance of maize hybrid seeds (Zea mays L.). Pre-sowing laser irradiation treatment on the seeds was done, during 20 s, by using a diode laser with output power of 27.4 mW at 650 nm wavelength. To evaluate the pre-sowing laser irradiation effects on the seed field performance, a randomized complete block experimental design with 5 replications was used for statistical analysis. The maize seed genotypes used in the present study were VC-AZ, VS-AM and MT-1415. Also, by using photoacoustic spectroscopy, the optical absorption coefficient (b) of each maize genotype was obtained. In order to evaluate the effects of laser irradiation on the seed field performance some vigour tests were done and the results are showed. In the case of MT-1415 a negative biostimulation for seedling emergence percentage, seedling emergence rate and chlorophyll a content was observed, compared to the control experiment ie without irradiation. For VC-AZ and VS-AM genotypes no significant effects were obtained for the same vigour tests, as compared to the control experiment. These results show that it is necessary to find the optimal irradiation parameters to induce positive biostimulation in maize seeds, which also depends on the seed genotype. K e y w o r d s: Zea mays L., seed vigour, biostimulation, photoacoustic spectroscopy
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Claims 3
Claim · model-written summary
Laser irradiation negatively affected MT-1415 emergence percentage, emergence rate, and chlorophyll a content versus no irradiation.
- Material
- MT-1415e0
- Treatment
- laser irradiatione1
- Outcome
- seedling emergence percentage, seedling emergence rate and chlorophyll a contente0
- Direction
- negative biostimulatione0
- Comparator
- control experiment ie without irradiatione0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the case of MT-1415 a negative biostimulation for seedling emergence percentage, seedling emergence rate and chlorophyll a content was observed, compared to the control experiment ie without irradiation.”
t0“maize”
e1“effects of low intensity laser irradiation”
Claim · model-written summary
Laser irradiation showed no significant vigour-test effect for VC-AZ versus control.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For VC-AZ and VS-AM genotypes no significant effects were obtained for the same vigour tests, as compared to the control experiment.”
t0“maize”
e1“effects of low intensity laser irradiation”
Claim · model-written summary
Laser irradiation showed no significant vigour-test effect for VS-AM versus control.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For VC-AZ and VS-AM genotypes no significant effects were obtained for the same vigour tests, as compared to the control experiment.”
t0“maize”
e1“effects of low intensity laser irradiation”
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