Night-break Effect of LED Light with Different Wavelengths on Shoot Elongation of Chrysanthemum morifolium Ramat ^|^lsquo;Jimba^|^rsquo; and ^|^lsquo;Iwa no hakusen^|^rsquo;

Liao, Yi‐Chu; Suzuki, Kenta; Yu, Weiwu; Zhuang, Defeng; Takai, Yusuke; Ogasawara, Rie; Shimazu, Tadahiro; Fukui, Hirokazu

doi:10.2525/ecb.52.51

Cited by 9 publications

(8 citation statements)

References 21 publications

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“…The Fr light induced increase of the plant height, irrespective of the order of the two light qualities used ( Figure 1 A). The results are in agreement with those of Liao et al [ 23 ] who suggested the enhancement of shoot extension by Fr light during the photoperiod. Shoot elongation is generally controlled by the endogenous gibberellins.…”

Section: Discussionsupporting

confidence: 93%

“…Shoot elongation is generally controlled by the endogenous gibberellins. The Fr light possesses the ability to induce the gibberellin biosynthesis resulting in increased shoot elongation [ 23 ].…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, even NIs of low intensity are economical and effective means of controlling flowering in some species. The duration of the NI used in many studies [ 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ] investigating flowering control was ≥4 h. However, a short (15 min) interruption of the long-night phase effectively controlled flowering in chrysanthemum plants that were grown under B light during their photoperiod [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

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Morphogenesis, Flowering, and Gene Expression of Dendranthema grandiflorum in Response to Shift in Light Quality of Night Interruption

Park

Muneer

Jeong

2015

IJMS

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The impact of shifts in the spectral quality of light on morphogenesis, flowering, and photoperiodic gene expression during exposure to light quality of night interruption (NI) was investigated in Dendranthema grandiflorum. The circadian rhythms of plants grown in a closed walk-in growth chamber were interrupted at night for a total of 4 h, using light-emitting diodes with an intensity of 10 μmol·m−2·s−1 PPF. The light quality of the NI was shifted from one wavelength to another after the first 2 h. Light treatments consisting of all possible pairings of blue (B), red (R), far-red (Fr), and white (W) light were tested. Plants in the NI treatment groups exposed to Fr light grew larger than plants in other treatment groups. Of plants in NI treatment groups, those in the NI-WB treatment grew the least. In addition, the impact of shifts in the light quality of NI on leaf expansion was greater in treatment groups exposed to a combination of either B and R or R and W light, regardless of their order of supply. Flowering was observed in the NI-RB, NI-FrR, NI-BFr, NI-FrB, NI-WB, NI-FrW, NI-WFr, NI-WR, and SD (short-day) treatments, and was especially promoted in the NI-BFr and NI-FrB treatments. In a combined shift treatment of B and R or B and W light, the NI concluded with B light (NI-RB and NI-WB) treatment induced flowering. The transcriptional factors phyA, cry1 and FTL (FLOWERING LOCUS T) were positively affected, while phyB and AFT were negatively affected. In conclusion, morphogenesis, flowering, and transcriptional factors were all significantly affected either positively or negatively by shifts in the light quality of NI. The light quality of the first 2 h of NI affected neither morphogenesis nor flowering, while the light quality of the last 2 h of NI significantly affected both morphogenesis and flowering.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Morphogenesis, Flowering, and Gene Expression of Dendranthema grandiflorum in Response to Shift in Light Quality of Night Interruption

Park

Muneer

Jeong

2015

IJMS

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“…Accordingly, internode elongation is reported to be caused by gibberellin biosynthesis activated by far-red light irradiation (Pierik et al, 2004;Hisamatsu et al, 2005); in general, far-red light promotes plant internode elongation. Furthermore, some reports indicate far-red light in NB and end-of-day treatments affect stem elongation in chrysanthemum (Erik and Royal, 2001;Franklin and Whitelam, 2005;Hirai et al, 2006;Liao et al, 2014b). The present results indicate all cultivars conserved these responses regardless of their flowering types.…”

Section: Effects Of Nb Treatments On Plant Height and Leaf Numbersupporting

confidence: 71%

Varietal Differences in Flowering and Plant Growth Under Night-Break Treatment with LEDs in 12 Chrysanthemum Cultivars

Ochiai

Liao

Shimazu

et al. 2015

ecb

Self Cite

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Night-break (NB) treatment inhibits flowering in short-day plants and is widely used in the flower production of cut chrysanthemum (Chrysanthemum morifolium Ramat.). Light-emitting diode (LED) lamps have been replacing incandescent lamps owing to energy savings. Previous studies on chrysanthemum under NB treatment with LED lamps raise the possibility of varietal difference in floral differentiation ability. Therefore, this study evaluated the effects of NB treatment using LED lamps with several wavelengths on 12 chrysanthemum cultivars. NB treatments at 630-, 660-, and a combination of 660-and 735-nm LEDs inhibited floral differentiation in all cultivars. However, the effects of NB treatments with 690-and 735-nm LEDs differed among cultivars. Some cultivars showed inhibited floral differentiation with both 690-and 735-nm LED NB treatment, whereas others were scarcely affected. Meanwhile, NB treatment with a combination of 660-and 735nm LEDs had the most stabile inhibitory effect on floral differentiation among chrysanthemum cultivars.

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“…The light quality imposes important effects on the morphogenesis, photosynthesis (Kitazaki et al 2018), and flowering (Liao et al 2014) of plants. The growth and development of plants throughout their life cycles are controlled by photoreceptors; furthermore, photoreceptors monitor the light environment and help time key developmental transitions such as germination and flowering initiation (Kami et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Both the Quality and Positioning of the Night Interruption Light are Important for Flowering and Plant Extension Growth

Park

Jeong

2019

J Plant Growth Regul

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Chrysanthemum (Dendranthema grandiflorum Kitamura), a qualitative short-day plant, does not produce flowers when the night length is shorter than a cultivar-dependent critical value. Flowering is effectively inhibited when the required uninterrupted night period is broken by short periods of exposure to night interruption lights (NILs). The effects of the quality and positioning of the NIL on the morphogenesis, flowering, and photoperiodic gene expressions of chrysanthemum were investigated. Blue (NI-B), red (NI-R), far-red (NI-Fr), and white (NI-W) light-emitting diodes (LEDs) at an intensity of 10 μmol m −2 s −1 photosynthetic photon flux density (PPFD) were used to interrupt the dark period or plants grown in a closed walk-in growth chamber at night for a total of 4 h. The NILs were positioned to illuminate either the shoot tip, youngest mature leaf (vigorously growing third leaf from the shoot tip), or old leaf (third leaf from the stem base). The NI-R on the shoot tip and all NI-Fr treatments increased the plant extension growth, to a similar height observed in plants in long-day (LD) treatments. Extension growth was generally suppressed for plants in the NIB , and plant height was the smallest when NIB was shed onto the old leaf. Plants in all NIL treatments except NI-Fr showed a negative correlation between the plant height and the age of the leaf (or tissue) exposed to the NIL. Flowering was observed for plants in all treatments except for NI-R shed onto the shoot tip. The transcriptional factor PHYA was slightly expressed in plants which showed a flowering response. However, the CRY1, PHYB, and TFL was not expressed to levels reported previously, and the reason for low expression of these genes in these plants may be due to a combined effect of these genes with other flowering promoting and/or inhibiting genes. These results suggest that both the NIL quality and the age of the leaf (or tissue) exposed to the NIL affect the morphogenesis, flowering, and expression of transcriptional factors. Moreover, the previously known effects of the NIL quality on the morphogenesis as well as the vegetative to reproductive phase transition of plants were the most pronounced when the NIL irradiated the shoot tip, and the least pronounced when the NIL was shed onto the old leaf. Therefore, it seems that not only the appropriate quality, but also the appropriate positioning of the NIL, is important for optimizing flowering and plant extension growth.

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Night-break Effect of LED Light with Different Wavelengths on Shoot Elongation of Chrysanthemum morifolium Ramat ^|^lsquo;Jimba^|^rsquo; and ^|^lsquo;Iwa no hakusen^|^rsquo;

Cited by 9 publications

References 21 publications

Morphogenesis, Flowering, and Gene Expression of Dendranthema grandiflorum in Response to Shift in Light Quality of Night Interruption

Morphogenesis, Flowering, and Gene Expression of Dendranthema grandiflorum in Response to Shift in Light Quality of Night Interruption

Varietal Differences in Flowering and Plant Growth Under Night-Break Treatment with LEDs in 12 Chrysanthemum Cultivars

Both the Quality and Positioning of the Night Interruption Light are Important for Flowering and Plant Extension Growth

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