Manipulation of Intraday Durations of Blue- and Red-Light Irradiation to Improve Cos Lettuce Growth

The morphology of plants growing under combined blue- and red-light irradiation is affected by the presence or absence of time slots of blue- and red-light mono-irradiation. The purposes of this study were to investigate the morphology and growth of cos lettuce grown under light irradiation combinin...

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Autores principales:	Tomohiro Jishi, Ryo Matsuda, Kazuhiro Fujiwara
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	artificial light leaf elongation leaf morphology photomorphogenesis light receptors Plant culture SB1-1110
Acceso en línea:	https://doaj.org/article/badf069424224624aa011551041b6e44
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spelling	oai:doaj.org-article:badf069424224624aa011551041b6e442021-12-01T05:25:52ZManipulation of Intraday Durations of Blue- and Red-Light Irradiation to Improve Cos Lettuce Growth1664-462X10.3389/fpls.2021.778205https://doaj.org/article/badf069424224624aa011551041b6e442021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fpls.2021.778205/fullhttps://doaj.org/toc/1664-462XThe morphology of plants growing under combined blue- and red-light irradiation is affected by the presence or absence of time slots of blue- and red-light mono-irradiation. The purposes of this study were to investigate the morphology and growth of cos lettuce grown under light irradiation combining several durations of blue and red light simultaneously and independent mono-irradiations of blue and red light during the day, and to clarify the effects of the durations of blue-light mono-irradiation and blue-light irradiation. Young cos lettuce seedlings were grown under 24-h blue-light irradiation with a photosynthetic photon flux density (PPFD) of 110μmol m−2 s−1 (B+0R) or under 24-h blue-light irradiation with a PPFD of 100μmol m−2 s−1 supplemented with 8 (B+8R), 16 (B+16R), and 24-h (B+24R) red-light irradiation with PPFDs of 30, 15, and 10μmol m−2 s−1, respectively (Experiment 1). The daily light integral was 9.50mol m−2 in all treatments. In Experiment 1, leaf elongation was promoted as the duration of red-light irradiation decreased and the duration of blue-light mono-irradiation increased. The maximum shoot dry weight was observed under the B+8R treatment. Growth was likely promoted by the expansion of the light-receptive area caused by moderate leaf elongation without tilting. In Experiment 2, young cos lettuce seedlings were grown as for Experiment 1, but blue- and red-light irradiation intensities were reversed (R+0B, R+8B, R+16B, and R+24B). Leaf elongation was promoted by the absence of blue-light irradiation (R+0B). The leaf surface was increasingly flattened, and the shoot dry weight was enhanced, as the duration of blue-light irradiation increased. Thus, cos lettuce leaf morphology may be manipulated by adjusting each duration of blue-light mono-irradiation, red-light mono-irradiation, and blue- and red-light simultaneous irradiation, which can, in turn, promote cos lettuce growth.Tomohiro JishiTomohiro JishiRyo MatsudaKazuhiro FujiwaraFrontiers Media S.A.articleartificial lightleaf elongationleaf morphologyphotomorphogenesislight receptorsPlant cultureSB1-1110ENFrontiers in Plant Science, Vol 12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	artificial light leaf elongation leaf morphology photomorphogenesis light receptors Plant culture SB1-1110
spellingShingle	artificial light leaf elongation leaf morphology photomorphogenesis light receptors Plant culture SB1-1110 Tomohiro Jishi Tomohiro Jishi Ryo Matsuda Kazuhiro Fujiwara Manipulation of Intraday Durations of Blue- and Red-Light Irradiation to Improve Cos Lettuce Growth
description	The morphology of plants growing under combined blue- and red-light irradiation is affected by the presence or absence of time slots of blue- and red-light mono-irradiation. The purposes of this study were to investigate the morphology and growth of cos lettuce grown under light irradiation combining several durations of blue and red light simultaneously and independent mono-irradiations of blue and red light during the day, and to clarify the effects of the durations of blue-light mono-irradiation and blue-light irradiation. Young cos lettuce seedlings were grown under 24-h blue-light irradiation with a photosynthetic photon flux density (PPFD) of 110μmol m−2 s−1 (B+0R) or under 24-h blue-light irradiation with a PPFD of 100μmol m−2 s−1 supplemented with 8 (B+8R), 16 (B+16R), and 24-h (B+24R) red-light irradiation with PPFDs of 30, 15, and 10μmol m−2 s−1, respectively (Experiment 1). The daily light integral was 9.50mol m−2 in all treatments. In Experiment 1, leaf elongation was promoted as the duration of red-light irradiation decreased and the duration of blue-light mono-irradiation increased. The maximum shoot dry weight was observed under the B+8R treatment. Growth was likely promoted by the expansion of the light-receptive area caused by moderate leaf elongation without tilting. In Experiment 2, young cos lettuce seedlings were grown as for Experiment 1, but blue- and red-light irradiation intensities were reversed (R+0B, R+8B, R+16B, and R+24B). Leaf elongation was promoted by the absence of blue-light irradiation (R+0B). The leaf surface was increasingly flattened, and the shoot dry weight was enhanced, as the duration of blue-light irradiation increased. Thus, cos lettuce leaf morphology may be manipulated by adjusting each duration of blue-light mono-irradiation, red-light mono-irradiation, and blue- and red-light simultaneous irradiation, which can, in turn, promote cos lettuce growth.
format	article
author	Tomohiro Jishi Tomohiro Jishi Ryo Matsuda Kazuhiro Fujiwara
author_facet	Tomohiro Jishi Tomohiro Jishi Ryo Matsuda Kazuhiro Fujiwara
author_sort	Tomohiro Jishi
title	Manipulation of Intraday Durations of Blue- and Red-Light Irradiation to Improve Cos Lettuce Growth
title_short	Manipulation of Intraday Durations of Blue- and Red-Light Irradiation to Improve Cos Lettuce Growth
title_full	Manipulation of Intraday Durations of Blue- and Red-Light Irradiation to Improve Cos Lettuce Growth
title_fullStr	Manipulation of Intraday Durations of Blue- and Red-Light Irradiation to Improve Cos Lettuce Growth
title_full_unstemmed	Manipulation of Intraday Durations of Blue- and Red-Light Irradiation to Improve Cos Lettuce Growth
title_sort	manipulation of intraday durations of blue- and red-light irradiation to improve cos lettuce growth
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/badf069424224624aa011551041b6e44
work_keys_str_mv	AT tomohirojishi manipulationofintradaydurationsofblueandredlightirradiationtoimprovecoslettucegrowth AT tomohirojishi manipulationofintradaydurationsofblueandredlightirradiationtoimprovecoslettucegrowth AT ryomatsuda manipulationofintradaydurationsofblueandredlightirradiationtoimprovecoslettucegrowth AT kazuhirofujiwara manipulationofintradaydurationsofblueandredlightirradiationtoimprovecoslettucegrowth
_version_	1718405567101272064

Manipulation of Intraday Durations of Blue- and Red-Light Irradiation to Improve Cos Lettuce Growth

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