Carotenoid cleavage dioxygenases and their apocarotenoid products in plants

Ohmiya, Akemi

doi:10.5511/plantbiotechnology.26.351

Cited by 116 publications

(94 citation statements)

References 64 publications

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“…There is increasing evidence that CCD1 contributes to apocarotenoid formation in flowers and fruits (Ohmiya, 2009); however, suppression of CCD1 transcript levels does not affect carotenoid levels (Auldridge et al, 2006;Simkin et al, 2004a, b). One explanation is the limited access of CCD1 to carotenoids in plastids.…”

Section: Discussionmentioning

confidence: 99%

Mechanism behind Petal Color Mutation Induced by Heavy-Ion-Beam Irradiation of Recalcitrant Chrysanthemum Cultivar

Ohmiya

Toyoda

Watanabe

et al. 2012

J. Japan. Soc. Hort. Sci.

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White chrysanthemum flowers frequently mutate to yellow, but such mutation is rare in 'Jimba'. We found a bud sport (BS) of 'Jimba' with a faintly yellow flower. By applying heavy-ion-beam radiation to the BS, we obtained mutants with a pale yellow flower (IB-1 lines). We irradiated those and obtained mutants with much deeper yellow flowers (IB-2 lines). Decreased expression of carotenoid cleavage dioxygenase 4 (CmCCD4a) was well correlated with increased carotenoid content in petals of the mutants. CmCCD4a comprises a small gene family in the 'Jimba' genome; at least 4 homologs were expressed in the petals of wild-type 'Jimba' and BS, but only 3 were expressed in the petals of IB-1 and only 1 in IB-2. We hypothesize that the decreased number of CmCCD4a homologs caused by irradiation is responsible for the decrease in expression.

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Section: Discussionmentioning

confidence: 99%

Mechanism behind Petal Color Mutation Induced by Heavy-Ion-Beam Irradiation of Recalcitrant Chrysanthemum Cultivar

Ohmiya

Toyoda

Watanabe

et al. 2012

J. Japan. Soc. Hort. Sci.

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“…CCD1 is involved in the production of volatile compounds such as b-ionone and b-cyclocitral. Members of the NCED and CCD4 clusters contribute to abscisic acid biosynthesis and formation of flower pigments such as bixin and crocetin, respectively (Ohmiya 2009). CCD7 and CCD8 are involved in the biosynthesis of the branchinhibiting hormone(s).…”

Section: Genes Involved In Sl Biosynthesismentioning

confidence: 99%

Strigolactone, a key regulator of nutrient allocation in plants

Umehara

2011

Plant Biotechnology

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“…9-Cis-β-carotene is transformed into carlactone by sequential oxidative cleavage by two carotenoid cleavage dioxygenases (CCD7 and CCD8) (Alder et al 2012), and thus SLs belong to the apocarotenoids, as the phytohormone abscisic acid (ABA) (Ohmiya 2009;Walter and Strack 2011). In rice, carlactone is then converted into the strigolactone ent-2′-epi-5-deoxystrigol by a cytochrome P450, Os900, that is homologous to Arabidopsis MAX1 .…”

Section: Sl Biosynthesis and Signallingmentioning

confidence: 99%

Ecological relevance of strigolactones in nutrient uptake and other abiotic stresses, and in plant-microbe interactions below-ground

Andreo-Jiménez¹,

Ruyter-Spira

Bouwmeester

et al. 2015

Plant Soil

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Background Plants are exposed to ever changing and often unfavourable environmental conditions, which cause both abiotic and biotic stresses. They have evolved sophisticated mechanisms to flexibly adapt themselves to these stress conditions. To achieve such adaptation, they need to control and coordinate physiological, developmental and defence responses. These responses are regulated through a complex network of interconnected signalling pathways, in which plant hormones play a key role. Strigolactones (SLs) are multifunctional molecules recently classified as a new class of phytohormones, playing a key role as modulators of the coordinated plant development in response to nutrient deficient conditions, especially phosphorus shortage. Belowground, besides regulating root architecture, they also act as molecular cues that help plants to communicate with their environment. Scope This review discusses current knowledge on the different roles of SLs below-ground, paying special attention to their involvement in phosphorus uptake by the plant by regulating root architecture and the establishment of mutualistic symbiosis with arbuscular mycorrhizal fungi. Their involvement in plant responses to other abiotic stresses such as drought and salinity, as well as in other plant-(micro)organisms interactions such as nodulation and root parasitic plants are also highlighted. Finally, the agronomical implications of SLs below-ground and their potential use in sustainable agriculture are addressed. Conclusions Experimental evidence illustrates the biological and ecological importance of SLs in the rhizosphere. Their multifunctional nature opens up a wide range of possibilities for potential applications in agriculture. However, a more in-depth understanding on the SL functioning/signalling mechanisms is required to allow us to exploit their full potential.

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Carotenoid cleavage dioxygenases and their apocarotenoid products in plants

Cited by 116 publications

References 64 publications

Mechanism behind Petal Color Mutation Induced by Heavy-Ion-Beam Irradiation of Recalcitrant Chrysanthemum Cultivar

Mechanism behind Petal Color Mutation Induced by Heavy-Ion-Beam Irradiation of Recalcitrant Chrysanthemum Cultivar

Strigolactone, a key regulator of nutrient allocation in plants

Ecological relevance of strigolactones in nutrient uptake and other abiotic stresses, and in plant-microbe interactions below-ground

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