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Effects of magnetic field irradiation on broccoli seed with accelerated aging

100%

Martinez F. R., Pacheco A. D., Aguilar C. H., Pardo G. P., Ortiz E. M.

Acta Agrophysica

2014

tom 21

nr 1

In order to improve the physiological quality of aged broccoli seed (Brassica oleracea var. Waltham29), in this study a variable magnetic field (VMF) of 3.6 mT, 60 Hz by 5min was used as pre-sowing treatment. The accelerated aging treatment was applied for 0, 48 and 72 h (AA0h, AA48h and AA72h) and then the VMF treatment, under a randomised complete block design with 4 replications of 30 seeds. For seeds aged for 72 h a final germination of 20% was obtained, whereas without magnetic stimulation it was null. However, the magnetic bio-stimulation in 48 h aged seeds was significantly negative, reducing the final germination by 45.83% compared to the treatment without magnetic field, while the VMF effects in unaged seed were zero. The variable magnetic field effects depended on the seed aging time, resulting in positive, negative and null outcomes (responses) in vigour variables.

High intensity LED light in lettuce seed physiology (Lactuca sativa L.)

86%

Pardo G. P., Aguilar C. H., Martinez F. R., Pacheco A. D., Martinez C. L., Ortiz E. M.

Acta Agrophysica

2013

tom 20

nr 4

In order to improve the physiology of plants, this research evaluated the effect of high-intensity LED light (red, blue and green) on the following variables: germination (PG), hypocotyl length (HL), fresh (FW) and dry (DW) weight, in three types of lettuce seed (White Boston, Romana and Black Simpson). Exposure times with colour light were 12, 6 and 3h, with a complement of time for treatments with 6 and 3h of white LED light. We used a completely randomised design with four replications of 30 seeds. Treatments with green and red light to 12h had increases above 90% in HL against the control for the three varieties. The blue light treatment (3h) increased 23% in FW White Boston variety and the red light (3h) increased 14% the DW variable in Roman variety, compared to the control. In this study, treatments with colour light presented results above the control; however, a treatment with a single type of light is not optimal to improve plant physiology. The physiological responses evaluated showed variation related to the genotype of seed and to the time of exposure to high-intensity LED light, so this type of light is a viable option for improving the physiology of plants.

Ograniczanie wyników

2 Acta Agrophysica

2 Aguilar C. H.

2 Martinez F. R.

2 Ortiz E. M.

2 Pacheco A. D.

2 Pardo G. P.

1 Martinez C. L.

1 2014

1 2013

Wyniki wyszukiwania

Effects of magnetic field irradiation on broccoli seed with accelerated aging

High intensity LED light in lettuce seed physiology (Lactuca sativa L.)