Evolution of circadian clocks along the green lineage

PLANT PHYSIOLOGY, Год журнала: 2022, Номер 190(2), С. 924 - 937

Опубликована: Март 22, 2022

Circadian clocks govern temporal programs in the green lineage (Chloroplastida) as they do other photosynthetic pro- and eukaryotes, bacteria, fungi, animals, humans. Their physiological properties, including entrainment, phase responses, temperature compensation, are well conserved. The involvement of transcriptional/translational feedback loops oscillatory machinery reversible phosphorylation events also maintained. control a large variety output rhythms algae terrestrial plants, adjusting their metabolism behavior to day-night cycle. angiosperm Arabidopsis (Arabidopsis thaliana) represents well-studied circadian clock model. Several molecular components its conserved Chloroplastida, but functions may differ. Conserved include at least one member CIRCADIAN CLOCK ASSOCIATED1/REVEILLE PSEUDO RESPONSE REGULATOR family. evening complex members EARLY FLOWERING3 (ELF3), ELF4, LUX ARRHYTHMO found moss Physcomitrium patens liverwort Marchantia polymorpha. In flagellate chlorophyte alga Chlamydomonas reinhardtii, only homologs ELF4 (named RHYTHM OF CHLOROPLAST ROC75) present. Temporal ROC75 expression C. reinhardtii is opposite that LUX, suggesting different mechanisms. picoalga Ostreococcus tauri, both ELF genes missing, it has progenitor "green" clock. Clock-relevant photoreceptors thermosensors vary within lineage, except for CRYPTOCHROMEs, whose More genetically tractable models Chloroplastida needed draw final conclusions about gradual evolution lineage.

Язык: Английский

---

Low-temperature and circadian signals are integrated by the sigma factor SIG5

Nature Plants, Год журнала: 2023, Номер 9(4), С. 661 - 672

Опубликована: Март 30, 2023

Chloroplasts are a common feature of plant cells and aspects their metabolism, including photosynthesis, influenced by low-temperature conditions. contain small circular genome that encodes essential components the photosynthetic apparatus chloroplast transcription/translation machinery. Here, we show in Arabidopsis, nuclear-encoded sigma factor controls transcription (SIGMA FACTOR5) contributes to adaptation This process involves regulation SIGMA FACTOR5 expression response cold bZIP factors ELONGATED HYPOCOTYL5 HOMOLOG. The this pathway is gated circadian clock, it enhances efficiency during long-term freezing exposure. We identify integrates signals, modulates chloroplasts

Язык: Английский

---

Aschoff’s rule on circadian rhythms orchestrated by blue light sensor CRY2 and clock component PRR9

Nature Communications, Год журнала: 2022, Номер 13(1)

Опубликована: Окт. 5, 2022

Circadian pace is modulated by light intensity, known as the Aschoff's rule, with largely unrevealed mechanisms. Here we report that photoreceptor CRY2 mediates blue input to circadian clock directly interacting core component PRR9 in dependent manner. This physical interaction dually blocks accessibility of protein its co-repressor TPL/TPRs and resulting kinase PPKs. Notably, phosphorylation PPKs critical for DNA binding repressive activity, hence ensure proper speed. Given labile nature strong light, our findings provide a mechanistic explanation rule plants, i.e., triggers turnover proportional which accordingly releasing fine tune Our not only reveal network mediating into clock, but also unmask mechanism Arabidopsis senses intensity.

Язык: Английский

---

Circadian coordination of cellular processes and abiotic stress responses

Current Opinion in Plant Biology, Год журнала: 2021, Номер 64, С. 102133 - 102133

Опубликована: Ноя. 10, 2021

Diel changes in the environment are perceived by circadian clock which transmits temporal information throughout plant cell to synchronize daily and seasonal environmental signals with internal biological processes. Dynamic modulations of diverse levels gene regulation within impacted stress. Recent insights into control cellular processes such as alternative splicing, polyadenylation, noncoding RNAs discussed. We highlight studies on reactive oxygen species, calcium signaling, gating temperature stress responses. Finally, we briefly summarize recent work translation-specific rhythmicity cycle genes subcellular localization relocalization oscillator components. Together, this mini-review highlights these events context responses Arabidopsis.

Язык: Английский

---

Cytokinins act synergistically with heat acclimation to enhance rice thermotolerance affecting hormonal dynamics, gene expression and volatile emission

Plant Physiology and Biochemistry, Год журнала: 2023, Номер 198, С. 107683 - 107683

Опубликована: Апрель 6, 2023

Heat stress is a frequent environmental constraint. Phytohormones can significantly affect plant thermotolerance. This study compares the effects of exogenous cytokinin meta-topolin-9-(tetrahydropyran-2-yl)purine (mT9THP) on rice (Oryza sativa) under control conditions, after acclimation by moderate temperature (A; 37 °C, 2h), heat (HS; 45 6h) and their combination (AHS). mT9THP stable derivative that releases active meta-topolin gradually, preventing rapid deactivation reported application. Under negatively affected jasmonic acid in leaves abscisic salicylic acids crowns (meristematic tissue crucial for tillering). Exogenous stimulated emission volatile organic compounds (VOC), especially 2,3-butanediol. Acclimation upregulated trans-zeatin, expression stress- hormone-related genes, VOC emission. The promoted markers antioxidant enzymes moderately increased emission, including 2-ethylhexyl salicylate or furanones. AHS HS responses shared some common features, namely, increase ethylene precursor aminocyclopropane-1-carboxylic (ACC), cis-zeatin methylthio derivatives, as well shock proteins, alternative oxidases, superoxide dismutases. specifically induced auxin indole-3-acetic levels, diacylglycerolipids with fewer double bonds, emissions [e.g., acetamide, lipoxygenase (LOX)-derived volatiles]. direct HS, mimicked positive effects. had strongest thermo-protective effect, strong stimulation (including LOX-derived ones). These results demonstrate first time contribution volatiles to beneficial

Язык: Английский

---

Decoding the plant clock: a review of mathematical models for the circadian regulatory network

Plant Molecular Biology, Год журнала: 2024, Номер 114(5)

Опубликована: Авг. 29, 2024

Язык: Английский

---

The OsGATA gene family as a promising candidate for applying the CrISPr/Cas genome editing technology to improve the nutritional and yield qualities of rice (Oryza sativa L.)

PROCEEDINGS ON APPLIED BOTANY GENETICS AND BREEDING, Год журнала: 2025, Номер 185(4), С. 264 - 280

Опубликована: Янв. 11, 2025

Molecular breeding of rice ( Oryza sativa L.) for yield is great importance ensuring food security the population. Living organisms manifest genetically determined responses to environmental factors, including stressors. Photosynthetic activity affects all metabolic processes in plant cells. The genes involved photosynthesis, their turn, are regulated by differentially expressed associated with circadian rhythms. Plants, as sedentary organisms, require more efficient regulation gene expression. GATA factors transcription (TFs) that affect production phytohormones and mediate stress response. divided into four main classes (A D), based on difference structure zinc finger domain, seven subfamilies, depending availability additional domains. TFs incorporate domain structures may be Effects rhythms influence other regulatory pathways plants, which makes study relevant significant. most well-known popular method editing at moment CRISPR/Cas technology. More than 30 were successfully genomically edited using technology period from 2018 through 2023. This helped improve valuable agronomic traits. review summarizes information about classification known functions OsGATA provides evidence possibility influencing photoperiodicity these genes.

Язык: Английский

---

The Association between GABA-shunt and Circadian Rhythm Directs Salt Stress Responses in Nicotiana tabaccum L.

Plant Science, Год журнала: 2025, Номер unknown, С. 112552 - 112552

Опубликована: Май 1, 2025

Язык: Английский

---

Circadian and diel regulation of photosynthesis in the bryophyte Marchantia polymorpha

Plant Cell & Environment, Год журнала: 2022, Номер 45(8), С. 2381 - 2394

Опубликована: Май 25, 2022

Circadian rhythms are 24-h biological cycles that align metabolism, physiology, and development with daily environmental fluctuations. Photosynthetic processes governed by the circadian clock in both flowering plants some cyanobacteria, but it is unclear how extensively this conserved throughout green lineage. We investigated contribution of regulation to aspects photosynthesis Marchantia polymorpha, a liverwort diverged from early evolution land plants. First, we identified M. polymorpha photosynthetic biochemistry, measured using two approaches (delayed fluorescence, pulse amplitude modulation fluorescence). Second, light-dark synchronize phase 24 h whereas phases different thalli desynchronize under free-running conditions. This might also be due masking underlying cycles. Finally, used pharmacological approach identify chloroplast translation necessary for control light-harvesting polymorpha. infer well-conserved amongst terrestrial

Язык: Английский

---

Time of day and genotype sensitivity adjust molecular responses to temperature stress in sorghum

The Plant Journal, Год журнала: 2023, Номер 116(4), С. 1081 - 1096

Опубликована: Сен. 16, 2023

Sorghum is one of the four major C4 crops that are considered to be tolerant environmental extremes. shows distinct growth responses temperature stress depending on sensitivity genetic background. About half transcripts in sorghum exhibit diurnal rhythmic expressions emphasizing significant coordination with environment. However, an understanding how molecular dynamics contribute genotype-specific context time day not known. We examined whether and impact gene expression thermo-sensitive thermo-tolerant genotypes. found highly influencing responses, which can explained by most thermo-responsive genes. This effect more pronounced genotypes, suggesting a stronger regulation and/or circadian clock. Genotypic differences were mostly observed average levels, may responsible for contrasting sensitivities versus susceptible varieties. also identified groups genes altered time-of-day manner. These include transcriptional regulators several members Ca2+ -binding EF-hand protein family. hypothesize variation these between genotypes along independent fine-tuning pathways. findings offer new opportunity selectively target specific efforts develop climate-resilient based their genotype stress.

Язык: Английский

---