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Pexophagy suppresses ROS-induced damage in leaf cells under high-intensity light
Pexophagy plays a pivotal role in the selective removal of ROS-generating peroxisomes, which protects plants from oxidative damage during photosynthesis under high-intensity light.
- Kazusato Oikawa
- , Shino Goto-Yamada
- & Mikio Nishimura
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Article
| Open Access
Oxidative post-translational modification of EXECUTER1 is required for singlet oxygen sensing in plastids
Singlet oxygen generated by photosynthesis under photo-oxidative stress conditions triggers retrograde signaling from plastids to nuclei. Here, the authors show that singlet oxygen perception and subsequent signaling events require oxidative post-translational modification of the EXECUTER1 protein.
- Vivek Dogra
- , Mingyue Li
- & Chanhong Kim
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Article
| Open Access
Genome-wide excision repair in Arabidopsis is coupled to transcription and reflects circadian gene expression patterns
Plants use nucleotide excision repair to maintain genome integrity in response to damage caused by stresses such as UV radiation. Here Oztas et al. use genome-wide profiling to show that excision repair in Arabidopsis is strongly coupled to transcription and reflects circadian patterns of gene expression.
- Onur Oztas
- , Christopher P. Selby
- & Ogun Adebali
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Article
| Open Access
Different carotenoid conformations have distinct functions in light-harvesting regulation in plants
Carotenoids can dissipate excess energy captured by photosynthetic light-harvesting complexes to prevent photodamage. Here, via spectroscopic and in silico approaches, Liguori et al. resolve different carotenoid dark states and propose conformational changes that permit them to act as either energy donors or quenchers.
- Nicoletta Liguori
- , Pengqi Xu
- & Roberta Croce
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Article
| Open Access
UVR2 ensures transgenerational genome stability under simulated natural UV-B in Arabidopsis t haliana
As sessile organisms, plants are exposed to recurrent solar UV-B radiation that can induce DNA damage. Here, the authors characterize mutations that occur in Arabidopsisunder light regimes simulating natural UV-B exposure and find that the UVR2 photolyase is the major component required to maintain genome stability.
- Eva-Maria Willing
- , Thomas Piofczyk
- & Ales Pecinka
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Article
| Open Access
Characterization of a recently evolved flavonol-phenylacyltransferase gene provides signatures of natural light selection in Brassicaceae
Protection from UV-B is critical for land plant survival. Here Tohge et al. show that saiginols, a novel class of flavonols that efficiently absorb UV-B, accumulate in Arabidopsisaccessions collected from high irradiance regions and identify a flavonol phenylacyltransferase gene required for saiginol production.
- Takayuki Tohge
- , Regina Wendenburg
- & Alisdair R. Fernie
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CUL4 forms an E3 ligase with COP1 and SPA to promote light-induced degradation of PIF1
Light exposure to plants initiates a developmental programme known as photomorphogenesis, which is triggered by repression of PIF transcription factors. Here Zhu et al. identify an E3 ubiquitin ligase complex that contributes to photomorphogenesis and is required for the degradation of PIF1.
- Ling Zhu
- , Qingyun Bu
- & Enamul Huq
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A single locus confers tolerance to continuous light and allows substantial yield increase in tomato
Domesticated tomato plants are damaged by continuous light exposure, limiting the usefulness of artificial light to boost yields. Velez-Ramirez et al. identify a locus conferring continuous light tolerance in wild tomatoes, and show that its introgression into modern tomato lines enhances yield by 20%.
- Aaron I. Velez-Ramirez
- , Wim van Ieperen
- & Frank F. Millenaar
Decoding early stress signaling waves in living plants using nanosensor multiplexing