Effects of Light and Wounding on Jasmonates in Rice  phyAphyC Mutants

Brendel, Rita; Svyatyna, Katharina; Reichelt, Michael; Mithöfer, Axel; Takano, Makoto; Kamiya, Yûji; Nick, Peter; Riemann, Michael

doi:10.3390/plants3010143

Cited by 8 publications

(5 citation statements)

References 44 publications

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“…LeMYC2 in tomato functions in a similar manner to regulate photomorphogenesis and tomato growth in response to the combined effects of blue light, ABA and JA signaling [ 39 ]. Recent studies also indicated that rice phyAphyC mutant seedlings greatly increased JA and JA-Ile levels as compared with the wild type in response to blue light [ 40 ], which suggests that phyA and phyC in rice may redundantly and negatively modulate JA biosynthesis under blue light. Indeed, we found that the blue-light photoreceptor CRY1 negatively regulated the levels of FIN219, a JA-conjugating enzyme for the formation of JA-Ile [ 27 ], under blue light ( Fig 2A ).…”

Section: Discussionmentioning

confidence: 99%

FIN219/JAR1 and cryptochrome1 antagonize each other to modulate photomorphogenesis under blue light in Arabidopsis

Chen

Yang

et al. 2018

PLoS Genet

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Plant development is affected by the integration of light and phytohormones, including jasmonates (JAs). To address the molecular mechanisms of possible interactions between blue light and JA signaling in Arabidopsis thaliana, we used molecular and transgenic approaches to understand the regulatory relationships between FAR-RED INSENSITIVE 219 (FIN219)/JASMONATE RESISTANT1 (JAR1) and the blue-light photoreceptor cryptochrome1 (CRY1). FIN219 overexpression in the wild type resulted in a short-hypocotyl phenotype under blue light. However, FIN219 overexpression in cry1, cry2 and cry1cry2 double mutant backgrounds resulted in phenotypes similar to their respective mutant backgrounds, which suggests that FIN219 function may require blue light photoreceptors. Intriguingly, FIN219 overexpression in transgenic plants harboring ectopic expression of the C terminus of CRY1 (GUS-CCT1), which exhibits a hypersensitive short-hypocotyl phenotype in all light conditions including darkness, led to a rescued phenotype under all light conditions except red light. Further expression studies showed mutual suppression between FIN219 and CRY1 under blue light. Strikingly, FIN219 overexpression in GUS-CCT1 transgenic lines (FIN219-OE/GUS-CCT1) abolished GUS-CCT1 fusion protein under blue light, whereas GUS-CCT1 fusion protein was stable in the fin219-2 mutant background (fin219-2/GUS-CCT1). Moreover, FIN219 strongly interacted with COP1 under blue light, and methyl JA (MeJA) treatment enhanced the interaction between FIN219 and GUS-CCT1 under blue light. Furthermore, FIN219 level affected GUS-CCT1 seedling responses such as anthocyanin accumulation and bacterial resistance under various light conditions and MeJA treatment. Thus, FIN219/JAR1 and CRY1 antagonize each other to modulate photomorphogenic development of seedlings and stress responses in Arabidopsis.

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Section: Discussionmentioning

confidence: 99%

FIN219/JAR1 and cryptochrome1 antagonize each other to modulate photomorphogenesis under blue light in Arabidopsis

Chen

Yang

et al. 2018

PLoS Genet

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“…In contrast, under blue laser light radiation (442.1 nm), the JA content noticeably increased and accounted for 141.5 ± 9.2 ng g −1 wet weight. JA is a lipid derivative (specifically, the derivative of ɑ-linolenic acid) and is known to be an important regulator of photomorthogenesis, the processes of plant development which gets activated using the receptors sensitive to red and blue light [23]. The work just mentioned shows in particular that, in rice seedlings, the content of JA and its derivatives increased significantly, becoming more than three times higher after a long-term blue incoherent light radiation.…”

Section: Resultsmentioning

confidence: 99%

Influence of low-intensity laser radiation on the dynamics of some phytohormone content in the callus tissues of wheat Triticum aestivum L.

Дударева¹,

Rudikovskaya²,

Шмаков³

et al. 2017

Laser Phys.

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We carried out an analysis of the influence of low-intensity He-Ne laser radiation on the dynamics of changes observed in the content of the phytohormones abscisic, jasmonic, salicylic, and indoleacetic acids in wheat calluses of Triticum aestivum L. using chromatography-mass spectrometry. He-Ne laser irradiation (λ = 632.8 nm) in its stimulant dose (3.5 J cm −2 ) was proved to cause a decrease in jasmonic and indoleacetic acid content and, simultaneously, a significant (2.5-3 times) increase in 'stress' abscisic and salicylic acids. The response of jasmonic acid to He-Cd laser irradiation (λ = 441 nm) was specific, which is probably due to the blue-light-induced biosynthesis of the acid. This article discusses a possible connection between substantial changes in growth regulator content within the plant tissue under the influence of low-intensity laser irradiation and the stress character of this type of radiation.

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“… 54 via Agrobacterium tumefaciens C58C1 strains 55 harbouring the pK7FWG2-OsDLK construct or a construct for the tobamovirus RNA silencing suppressor p19 56 . Rice ( Oryza sativa L. japonica cultivar Nihonmasari ) seedlings were grown in phytoagar at 25 °C for 10 days 57 . pK7FWG2-OsDLK DNA was transformed into the second leaf blades following the protocol by Holweg et al .…”

Section: Methodsmentioning

confidence: 99%

A rice class-XIV kinesin enters the nucleus in response to cold

Walter

Liu

et al. 2018

Sci Rep

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Higher plants possess a large number of kinesins, but lack the minus-end directed dynein motors. However, the kinesin class XIV has strongly expanded, and minus-end directed motors from this class may have taken over functions of cytoplasmic dyneins. In this study, we address the functional aspects of a novel rice homologue of the Arabidopsis class-XIV kinesins ATK1 and ATK5. Since a loss-of-function rice mutant of this kinesin is not viable, the function was studied in tobacco BY-2 as heterologous system. OsDLK-GFP stably expressed in BY-2 cells decorates cortical microtubules, but also can shift into the nucleus of interphase cells. Because of this peculiar localisation, we coined the name Dual Localisation Kinesin (DLK). The nuclear import of this protein is strongly and reversibly promoted in response to cold. During mitosis, OsDLK is repartitioned between spindle and phragmoplast. Motility assays in vitro using show that OsDLK can convey mutual sliding of microtubules and moves at a velocity comparable to other class-XIV kinesins. When tobacco cells overexpressing OsDLK are synchronised, they exhibit a delayed entry into metaphase, while the later phases of mitosis are accelerated. The data are discussed in relation to additional functions of this kinesin type, beyond their transport along microtubules.

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Effects of Light and Wounding on Jasmonates in Rice phyAphyC Mutants

Cited by 8 publications

References 44 publications

FIN219/JAR1 and cryptochrome1 antagonize each other to modulate photomorphogenesis under blue light in Arabidopsis

FIN219/JAR1 and cryptochrome1 antagonize each other to modulate photomorphogenesis under blue light in Arabidopsis

Influence of low-intensity laser radiation on the dynamics of some phytohormone content in the callus tissues of wheat Triticum aestivum L.

A rice class-XIV kinesin enters the nucleus in response to cold

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