Kadman-Zahavi, A. and Ephrat, E. (1976) Development of plants in filtered sunlight. 2. Effects of spectral composition, light intensity, daylength and red and far-red irradiations on long- and short-day grasses. Israel Journal of Botany, 25 (1-2). pp. 11-23.
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Abstract
Several studies, undertaken as part of a survey in 1963-72 on the effects of modified spectral composition of natural illumination on plant development, are described. Plants were grown in a 1:1 mixture of vermiculite + peat contained in pots given nutrient sol. and placed under coloured frames, in net-houses or in the glasshouse. The response of barley and wheat (long-day spp.) and sorghum, rice, maize and Setaria italica (short-day spp.) to the spectral composition of the main light period and to end-of-day irradiations with (a) red or (b) far-red light was identical. Flowering and internode elongation were enhanced in (c) blue + far-red (with a high admixture of (b)) and were retarded in (d) pure blue light. Flowering was intermediate in orange (with a high admixture of (b)), in clear and in neutral shade. In barley, flowering in neutral daylight was directly related to light intensity but in (c) it was unaffected even by a large reduction in light intensity. Barley did not flower in 8-h short days except for a few plants in (c). Red light interruptions of 1.75 min promoted rapid flowering in (c) and advanced floral initiation in shade, but even 22-min light interruptions failed to induce flowering in (d). In short days, (b) given at the end of the day could not induce flowering but increased the rate of flowering, while (a) given at the end of the day somewhat reduced flowering in barley. In S. italica, (a) and (b) given at the end of the day increased and reduced, resp., the inhibition caused by subsequent 5-min red light interruptions
| Item Type: | Article |
|---|---|
| Author Affiliation: | Agricultural Research Organization, Volcani Center, Bet Dagan, Israel |
| Subjects: | Plant Physiology and Biochemistry > Biochemistry |
| Divisions: | Maize Sorghum |
| Depositing User: | Ms K Syamalamba |
| Date Deposited: | 29 Aug 2012 09:16 |
| Last Modified: | 29 Aug 2012 09:17 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/7585 |
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