Photoperiod, light, and temperature requirements to control plant architecture and flowering time in Salvia exserta
Salvia exserta is a native species of sub-tropical regions of South America that exhibits promising potential to become a novel ornamental crop. Because of the novelty of this genotype, data on the photoperiod, temperature, and light requirements to control vegetative growth and flowering time in th...
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2011Mata.pdf LINK AL EDITOR |
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| 100 | 1 | |a Mata, Diego Alejandro |9 11536 | |
| 245 | 0 | 0 | |a Photoperiod, light, and temperature requirements to control plant architecture and flowering time in Salvia exserta |
| 520 | |a Salvia exserta is a native species of sub-tropical regions of South America that exhibits promising potential to become a novel ornamental crop. Because of the novelty of this genotype, data on the photoperiod, temperature, and light requirements to control vegetative growth and flowering time in this species are completely absent. The aim of this work was to study how plant architecture and flowering time in S. exserta plants were affected by different photoperiods between 8 - 18 h, various photosynthetically active irradiances between 250 - 1, 470 umol m -2 s -1, and temperatures between 17° - 26°C, under greenhouse cultivation conditions.We also evaluated the effects of increasing the red:far-red [R:FR] ratio using a photoselective film.We demonstrated that photoperiods below 12 h, irradiances above 400 umol m -2 s -1, and higher temperatures [i.e., 20°C] accelerated flowering. Photoperiods above 8 h increased plant heights [by 22 - 55 percent], and the number of nodes was increased when plants were cultivated with 14 h of light. Higher irradiances [870 - 1, 040 umol m -2 s -1] reduced plant height by 20 percent and increased the number of lateral shoots three-fold. Higher temperatures [greater or equal than 20°C] reduced the number of lateral shoots by 50 percent. Plant architecture was significantly affected by light quality. A high R:FR ratio in the growing environment reduced plant height by 17 percent, doubled the number of lateral shoots, and delayed flowering. The results of our work suggest that controlling a few key environmental variables during cultivation is a low-cost and environmentally-friendly strategy to obtain highquality S. exserta plants for commercial ornamental markets. | ||
| 653 | 0 | |a SALVIA | |
| 700 | 1 | |9 65609 |a Botto, Javier Francisco | |
| 773 | |t Journal of Horticultural Science and Biotechnology |g Vol.86, no.4 (2011), p.408-414 | ||
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| 900 | |a ^tPhotoperiod, light, and temperature requirements to control plant architecture and flowering time in Salvia exserta | ||
| 900 | |a ^aMata^bD.A. | ||
| 900 | |a ^aBotto^bJ.F. | ||
| 900 | |a ^aMata^bD. A. | ||
| 900 | |a ^aBotto^bJ. F. | ||
| 900 | |a ^aMata^bD.A.^tInstituto de Floricultura - INTA, De los Reseros y Las Cabañas s/n, 1686 Hurlingham, Provincia de Buenos Aires, Argentina | ||
| 900 | |a ^aBotto^bJ.F.^tIFEVA, Facultad de AgronomÃa, Universidad de Buenos Aires y, Consejo Nacional de Investigaciones CientÃficas y Técnicas, Av. San MartÃn 4453, 1417 Ciudad Autónoma de Buenos Aires, Argentina | ||
| 900 | |a ^tJournal of Horticultural Science and Biotechnology^cJ. Hortic. Sci. Biotechnol. | ||
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| 900 | |a Salvia exserta is a native species of sub-tropical regions of South America that exhibits promising potential to become a novel ornamental crop. Because of the novelty of this genotype, data on the photoperiod, temperature, and light requirements to control vegetative growth and flowering time in this species are completely absent. The aim of this work was to study how plant architecture and flowering time in S. exserta plants were affected by different photoperiods between 8 - 18 h, various photosynthetically active irradiances between 250 - 1, 470 umol m -2 s -1, and temperatures between 17° - 26°C, under greenhouse cultivation conditions.We also evaluated the effects of increasing the red:far-red [R:FR] ratio using a photoselective film.We demonstrated that photoperiods below 12 h, irradiances above 400 umol m -2 s -1, and higher temperatures [i.e., 20°C] accelerated flowering. Photoperiods above 8 h increased plant heights [by 22 - 55 percent], and the number of nodes was increased when plants were cultivated with 14 h of light. Higher irradiances [870 - 1, 040 umol m -2 s -1] reduced plant height by 20 percent and increased the number of lateral shoots three-fold. Higher temperatures [greater or equal than 20°C] reduced the number of lateral shoots by 50 percent. Plant architecture was significantly affected by light quality. A high R:FR ratio in the growing environment reduced plant height by 17 percent, doubled the number of lateral shoots, and delayed flowering. The results of our work suggest that controlling a few key environmental variables during cultivation is a low-cost and environmentally-friendly strategy to obtain highquality S. exserta plants for commercial ornamental markets. | ||
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