Supplementary Light with Increased Blue Fraction Accelerates Emergence and Improves Development of the Inflorescence in Aechmea, Guzmania and Vriesea

In protected cultivation, increasing the light level via supplementary lighting (SL) is critical to improve external quality, especially in periods with low light availability. Despite wide applications, the effect of light quality remains understated. In this study, the effect of SL quality and nut...

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Autores principales:	Elahe Javadi Asayesh, Sasan Aliniaeifard, Naser Askari, Mahmood Reza Roozban, Mohammadhadi Sobhani, Georgios Tsaniklidis, Ernst J. Woltering, Dimitrios Fanourakis
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	biomass partitioning bromeliad chlorophyll fluorescence imaging electrical conductivity LED O–J–I–P-transient Plant culture SB1-1110
Acceso en línea:	https://doaj.org/article/ab932ba5502a4908aa2f6244397f4b9b
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spelling	oai:doaj.org-article:ab932ba5502a4908aa2f6244397f4b9b2021-11-25T17:47:34ZSupplementary Light with Increased Blue Fraction Accelerates Emergence and Improves Development of the Inflorescence in <i>Aechmea</i>, <i>Guzmania</i> and <i>Vriesea</i>10.3390/horticulturae71104852311-7524https://doaj.org/article/ab932ba5502a4908aa2f6244397f4b9b2021-11-01T00:00:00Zhttps://www.mdpi.com/2311-7524/7/11/485https://doaj.org/toc/2311-7524In protected cultivation, increasing the light level via supplementary lighting (SL) is critical to improve external quality, especially in periods with low light availability. Despite wide applications, the effect of light quality remains understated. In this study, the effect of SL quality and nutrient solution electrical conductivity (EC) on growth and flowering of three bromeliad species was investigated. Treatments included solar light, and this supplemented with R90B10 [90% red (R) and 10% blue (B)], R80B20 (80% R and 20% B), and R70B30 (70% R and 30% B). These were combined with an EC of 1 and 2 dS m<sup>-l</sup>. Irrespective of the light treatment, the higher EC promoted growth, inflorescence emergence, and development in <i>Aechmea fasciata</i> (Lindl.) Baker, whereas adverse effects were noted in <i>Guzmania</i> and <i>Vriesea</i>. The higher EC-induced negative effect in <i>Guzmania</i> and <i>Vriesea</i> was slightly alleviated by SL. With few notable exceptions, SL exerted limited effects on photosynthetic functionality. Depending on the species, SL improved external quality traits. In all species, SL increased root and inflorescence weight and stimulated biomass allocation to generative organs. It also accelerated inflorescence emergence and promoted inflorescence development. In this way, the time to commercial development stage was considerably shortened. These effects were more prominent at R80B20 and R70B30. Under those conditions, for instance, inflorescence emergence occurred 3–5 weeks earlier than in the control, depending on the species. In conclusion, SL with increased B proportion leads to shorter production period owing to faster emergence and improved development of the inflorescence and is recommended for commercial use.Elahe Javadi AsayeshSasan AliniaeifardNaser AskariMahmood Reza RoozbanMohammadhadi SobhaniGeorgios TsaniklidisErnst J. WolteringDimitrios FanourakisMDPI AGarticlebiomass partitioningbromeliadchlorophyll fluorescence imagingelectrical conductivityLEDO–J–I–P-transientPlant cultureSB1-1110ENHorticulturae, Vol 7, Iss 485, p 485 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	biomass partitioning bromeliad chlorophyll fluorescence imaging electrical conductivity LED O–J–I–P-transient Plant culture SB1-1110
spellingShingle	biomass partitioning bromeliad chlorophyll fluorescence imaging electrical conductivity LED O–J–I–P-transient Plant culture SB1-1110 Elahe Javadi Asayesh Sasan Aliniaeifard Naser Askari Mahmood Reza Roozban Mohammadhadi Sobhani Georgios Tsaniklidis Ernst J. Woltering Dimitrios Fanourakis Supplementary Light with Increased Blue Fraction Accelerates Emergence and Improves Development of the Inflorescence in <i>Aechmea</i>, <i>Guzmania</i> and <i>Vriesea</i>
description	In protected cultivation, increasing the light level via supplementary lighting (SL) is critical to improve external quality, especially in periods with low light availability. Despite wide applications, the effect of light quality remains understated. In this study, the effect of SL quality and nutrient solution electrical conductivity (EC) on growth and flowering of three bromeliad species was investigated. Treatments included solar light, and this supplemented with R90B10 [90% red (R) and 10% blue (B)], R80B20 (80% R and 20% B), and R70B30 (70% R and 30% B). These were combined with an EC of 1 and 2 dS m<sup>-l</sup>. Irrespective of the light treatment, the higher EC promoted growth, inflorescence emergence, and development in <i>Aechmea fasciata</i> (Lindl.) Baker, whereas adverse effects were noted in <i>Guzmania</i> and <i>Vriesea</i>. The higher EC-induced negative effect in <i>Guzmania</i> and <i>Vriesea</i> was slightly alleviated by SL. With few notable exceptions, SL exerted limited effects on photosynthetic functionality. Depending on the species, SL improved external quality traits. In all species, SL increased root and inflorescence weight and stimulated biomass allocation to generative organs. It also accelerated inflorescence emergence and promoted inflorescence development. In this way, the time to commercial development stage was considerably shortened. These effects were more prominent at R80B20 and R70B30. Under those conditions, for instance, inflorescence emergence occurred 3–5 weeks earlier than in the control, depending on the species. In conclusion, SL with increased B proportion leads to shorter production period owing to faster emergence and improved development of the inflorescence and is recommended for commercial use.
format	article
author	Elahe Javadi Asayesh Sasan Aliniaeifard Naser Askari Mahmood Reza Roozban Mohammadhadi Sobhani Georgios Tsaniklidis Ernst J. Woltering Dimitrios Fanourakis
author_facet	Elahe Javadi Asayesh Sasan Aliniaeifard Naser Askari Mahmood Reza Roozban Mohammadhadi Sobhani Georgios Tsaniklidis Ernst J. Woltering Dimitrios Fanourakis
author_sort	Elahe Javadi Asayesh
title	Supplementary Light with Increased Blue Fraction Accelerates Emergence and Improves Development of the Inflorescence in <i>Aechmea</i>, <i>Guzmania</i> and <i>Vriesea</i>
title_short	Supplementary Light with Increased Blue Fraction Accelerates Emergence and Improves Development of the Inflorescence in <i>Aechmea</i>, <i>Guzmania</i> and <i>Vriesea</i>
title_full	Supplementary Light with Increased Blue Fraction Accelerates Emergence and Improves Development of the Inflorescence in <i>Aechmea</i>, <i>Guzmania</i> and <i>Vriesea</i>
title_fullStr	Supplementary Light with Increased Blue Fraction Accelerates Emergence and Improves Development of the Inflorescence in <i>Aechmea</i>, <i>Guzmania</i> and <i>Vriesea</i>
title_full_unstemmed	Supplementary Light with Increased Blue Fraction Accelerates Emergence and Improves Development of the Inflorescence in <i>Aechmea</i>, <i>Guzmania</i> and <i>Vriesea</i>
title_sort	supplementary light with increased blue fraction accelerates emergence and improves development of the inflorescence in <i>aechmea</i>, <i>guzmania</i> and <i>vriesea</i>
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/ab932ba5502a4908aa2f6244397f4b9b
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Supplementary Light with Increased Blue Fraction Accelerates Emergence and Improves Development of the Inflorescence in <i>Aechmea</i>, <i>Guzmania</i> and <i>Vriesea</i>

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