Effects of light wavelength and irradiance on growth and flowering of Begonia * hiemalis in night-break treatment
2015
Nakajima, T. | Suzuki, T. | Shibata, T.
We examined the effects of light wavelength and irradiance on the growth and flowering of Begonia * hiemalis 'Netja' under night-break treatment. 1. Long-day treatments (16L8D) with light with wavelengths of 460 to 470 nm, 620 to 630 nm, and 730 to 740 nm effectively inhibited flower bud differentiation, with 620 to 630 nm being the most effective. 2. Interrupted short-day treatment (14L10D-11L13D-14L10D) with light with wavelengths of 620 to 630 nm at different distances from the plants had equivalent effects in inhibiting first flower bud differentiation, regardless of the distance. However, plant height, stem length, number of joints, the number of offshoots, and number of flower trusses were increased by the light irradiance. 3. With interrupted short-day treatment (14L10D-11L13D-14L10D) using light of different wide spectra, the influence of irradiance on plant height, stem length, and number of flower trusses was unclear. However, using light of the same wide spectrum increased the plant height, stem length, number of joints, number of offshoots, and number of flower trusses with increasing irradiance.
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