Directional blue light irradiation triggers epidermal cell elongation of abaxial side resulting in inhibition of leaf epinasty in geranium under red light condition

Fukuda, Naoya; Fujita, Mitsuko; Ohta, Yoshitaka; Sase, Sadanori; Nishimura, Shigeo; Ezura, Hiroshi

doi:10.1016/j.scienta.2007.08.006

Cited by 92 publications

(68 citation statements)

References 19 publications

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“…The inclusion of blue light at any level, however, restored normal leaf morphology (Massa et al, 2008). Fukuda et al (2008) also reported that geranium leaves showed one type of epinasty under red LEDs. Under a combination lamp with red and blue LEDs, the geranium produced normally shaped leaves.…”

Section: Discussionmentioning

confidence: 93%

“…Many studies have shown that both the light intensity and the light quality are important for the growth, development, pigmentation, and shape of plants (Amaki and Hirai, 2008;Fukuda et al, 2008;McNellis and Deng, 1995;Schuerger et al, 1997). Various types of artificial light have been used in plant production including fluorescent, metal halide, and high-pressure sodium lamps (Fang and Jao, 2000).…”

Section: Introductionmentioning

confidence: 99%

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Effects of Light Quality and Intensity on the Carbon Dioxide Exchange Rate, Growth, and Morphogenesis of Grafted Pepper Transplants during Healing and Acclimatization

Jang¹,

Mun²,

Seo³

et al. 2013

Korean Journal of Horticultural Science and Technology

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Abstract. This study evaluated the influence of light quality and intensity during healing and acclimatization on the CO 2 exchange rate, growth, and morphogenesis of grafted pepper (Capsicum annuum L.) transplants, using a system for the continuous measurement of the CO 2 exchange rate. C. annuum L. 'Nokkwang' and 'Tantan' were used as scions and rootstocks, respectively. Before grafting, the transplants were grown for four weeks in a growth chamber with artificial light, where the temperature was set at 25/18℃ (light/dark period) and the light period was 14 hours·d -1. The grafted pepper transplants were then healed and acclimatized under different light quality conditions using fluorescent lamps (control) and red, blue, and red + blue light-emitting diodes (LEDs). All the transplants were irradiated for 12 hours per day, for six days, at a photosynthetic photon flux (PPF) of 50, 100, or 180 μmol·m , the CO 2 exchange rate of the transplants irradiated with red LEDs was lowest and it was 37% lower than those irradiated with fluorescent lamps. The CO 2 exchange rates of transplants irradiated with blue LEDs was the highest and 20% higher than those irradiated under fluorescent lamps. The graft take was not affected by the light quality. The grafted pepper transplants irradiated with red LEDs had a lower SPAD value, leaf dry weight, and dry matter content. The transplants irradiated with blue LEDs had longer shoot length and heavier stem fresh weight than those irradiated with the other treatments. Leaves irradiated with the red LED had the smallest leaf area and showed leaf epinasty. In addition, the palisade and spongy cells of the pepper leaves were dysplastic and exhibited hyperplasia. Grafted pepper transplants treated with red + blue LEDs showed similar growth and morphology to those transplants irradiated with fluorescent lamps. These results suggest that high-quality grafted pepper transplants can be obtained by healing and acclimatization under a combination of blue and red lights at a high PPF level. Additional key words:Capsicum annuum L., graft, light emitting diode (LED), photosynthesis, photosynthetic photon flux (PPF) *Corresponding author: changhoo@snu.ac.kr † These authors are contributed equally to this work. ※ Received

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Section: Discussionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Effects of Light Quality and Intensity on the Carbon Dioxide Exchange Rate, Growth, and Morphogenesis of Grafted Pepper Transplants during Healing and Acclimatization

Jang¹,

Mun²,

Seo³

et al. 2013

Korean Journal of Horticultural Science and Technology

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“…This is supported by earlier findings in geranium and Arabidopsis. When these plants were grown in only red light (which has an infinite R:FR) they showed severe leaf epinasty, and adding blue light inhibited the leaf epinasty (Fukuda et al, 2008;Inoue et al, 2008). These findings already suggest that growing chrysanthemum plants in monochromatic red light may induce leaf epinasty.…”

Section: Leaf Epinasty and Light Spectrummentioning

confidence: 77%

“…In chrysanthemum there is also a morphological economically important trait that heavily varies within the typical growth circumstances. This is leaf epinasty: downward leaf curling along the transversal and longitudinal axes (Fukuda et al, 2008). In chrysanthemum it is observed in greenhouse production after disbudding (removing all flower buds except for the main bud), and during winter when assimilation 346 lamps are used during long periods of the day.…”

Section: Introductionmentioning

confidence: 99%

Leaf Epinasty in Chrysanthemum: Enabling Breeding Against an Adverse Trait by Physiological Research

Geest¹,

Ieperen²,

Post³

et al. 2012

Acta Hortic.

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Breeding for a certain trait is only possible when the phenotypic variation that is caused by genotypic variation can be estimated. For traits that strongly depend on environmental conditions, this can be extremely difficult and knowledge and collaboration with experts from other disciplines becomes essential. A wellknown example is breeding for disease resistance. Here, we describe a similar approach to assist breeding against adverse leaf deformations that severely reduce the ornamental value of some chrysanthemum (Dendranthema × grandiflora) genotypes during greenhouse cultivation in winter. These leaf deformations occur rather unpredictably, but seem to be related to the increased use of assimilation light. To breed against this trait knowledge is needed (i) about inductive environments in which sensitive and insensitive genotypes are distinguishable, and (ii) about the physiological background associated with leaf epinasty. In this paper hypothetical physiological factors and mechanisms are discussed, which may mediate effects of light spectrum and greenhouse climate on leaf epinasty. One factor involved could be starch accumulation, since leaf epinasty usually aggravates after disbudding -a practice that most probably alters the sink-source balance. Additionally, light spectra can affect the circadian clock and thereby disturb starch synthesis and breakdown resulting in accumulation. Both within and independent of this process, plant hormones such as auxin and ethylene may play a role in leaf epinasty. This theoretical framework will be used to further investigate the physiological background of leaf epinasty and to come up with a test in which susceptibility for leaf epinasty can be assessed.

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“…Sua intensidade e qualidade são essenciais para o crescimento, morfogênese e outras respostas fisiológicas nas plantas (FUKUDA et al, 2008;LI;KUBOTA, 2009). Estas, de maneira geral, apresentam maior desenvolvimento quando recebem distribuição uniforme da radiação luminosa por toda sua área foliar.…”

Section: Introductionunclassified

Suplementação luminosa no tomateiro cultivado em diferentes sistemas de condução em ambiente protegido

Pinheiro¹

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AGRADECIMENTOSPrimeiramente, agradeço a Deus por me conceder a vida e me tornar capaz de enfrentar os desafios que ela me proporciona. À Escola Superior de Agricultura "Luiz de Queiroz" por permitir a realização do curso de doutorado e pelo apoio no desenvolvimento deste projeto.À CAPES pela concessão da bolsa de estudo.À minha orientadora professora Simone da Costa Mello, pela orientação, paciência e confiança. Sua intensa dedicação e apoio foram fundamentais para a realização desta tese.Ao professor Paulo César Tavares de Melo, pela acolhida e orientação inicial, por toda experiência e informações compartilhadas, pela confiança e amizade.Ao professor Keigo Minami, por todos os ensinamentos, amizade, confiança e exemplo. Obrigado por me atender sempre prontamente e com muita atenção.À todos os funcionários do setor de Horticultura da ESALQ, em especial ao Aparecido Donizete Serrano pela ajuda e amizade.Aos secretários do departamento de produção vegetal e do programa de pós-graduação em fitotecnia da ESALQ, Elisabete Sarkis São João, Maria Célia Rodrigues, Paulo Jaoude e Luciane Aparecida Lopes Toledo, pela atenção, apoio e amizade.Ao colega Rafael Campagnol pela amizade e grandiosa ajuda na elaboração, instalação e condução do experimento. À todos os colegas graduandos e pós-graduandos do Grupo de Estudos e Práticas emOlericultura (GEPOL) pelo importante auxílio no experimento. Aos colegas Vinicius Shizuo Abuno, Gean Charles Monteiro e Guilherme ShinjiHarano pelo trabalho árduo e amizade, sem vocês a condução deste experimento não seria possível.Aos colegas Sueyde Fernandes de Oliveira e Gustavo Quesada Roldán pela amizade, apoio e colaboração.Aos colegas Mateus Tonini Eitelwein e Mauricio Roberto Cherubin pela grande amizade e colaboração nesse trabalho. Não dividimos apenas a moradia, dividimos sonhos e vocês foram verdadeiramente minha família neste período, obrigado por tudo.Aos amigos do "sexteto", Roberto, Luisa, Matheus e Marielle, mesmo distante neste período sempre me apoiaram com muito amor e carinho.À minha esposa Ani Caroline, pelo seu amor, seu constante apoio e sua espera.Aos meus pais José Renes e Marta Helena por acreditar sempre em mim. 6 Aos meus irmãos Henri e Márcio, pelo carinho e por estar presente em cada fase da minha vida.A todos que direta ou indiretamente contribuíram para a conclusão deste trabalho e que por ventura não mencionei, meu sincero agradecimento.

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Directional blue light irradiation triggers epidermal cell elongation of abaxial side resulting in inhibition of leaf epinasty in geranium under red light condition

Cited by 92 publications

References 19 publications

Effects of Light Quality and Intensity on the Carbon Dioxide Exchange Rate, Growth, and Morphogenesis of Grafted Pepper Transplants during Healing and Acclimatization

Effects of Light Quality and Intensity on the Carbon Dioxide Exchange Rate, Growth, and Morphogenesis of Grafted Pepper Transplants during Healing and Acclimatization

Leaf Epinasty in Chrysanthemum: Enabling Breeding Against an Adverse Trait by Physiological Research

Suplementação luminosa no tomateiro cultivado em diferentes sistemas de condução em ambiente protegido

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