Decoding plant thermosensors: mechanism of temperature perception and stress adaption

Frontiers in Plant Science, Journal Year: 2025, Volume and Issue: 16

Published: March 25, 2025

Global climate change, characterized by increased frequency and intensity of extreme temperature events, poses significant challenges to plant survival crop productivity. While considerable research has elucidated responses stress, the molecular mechanisms, particularly those involved in sensing, remain incompletely understood. Thermosensors plants play a crucial role translating signals into cellular responses, initiating downstream signaling cascades that govern adaptive processes. This review highlights recent advances identification classification thermosensors, exploring their physiological roles biochemical mechanisms which they sense changes. We also address thermosensor discovery discuss emerging strategies uncover novel thermosensory with implications for improving resilience stress face rapidly changing climate.

Language: Английский

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Molecular and structural basis of the chromatin remodeling activity by Arabidopsis DDM1

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: July 11, 2024

Abstract The histone H2A variant H2A.W occupies transposons and thus prevents access to them in Arabidopsis thaliana . is deposited by the chromatin remodeler DDM1, which also promotes accessibility of writers heterochromatin an unknown mechanism. To shed light on this question, we solve cryo-EM structures nucleosomes containing H2A.W, DDM1-H2A.W nucleosome complex. These show that DNA end flexibility higher than nucleosome. In complex, DDM1 binds N-terminal tail H4 nucleosomal increases nucleosomes. Based these biochemical structural results, propose counters low caused enable maintenance repressive epigenetic marks prevent their activity.

Language: Английский

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Genome-Wide Identification and Characterization of the Soybean Snf2 Gene Family and Expression Response to Rhizobia

International Journal of Molecular Sciences, Journal Year: 2023, Volume and Issue: 24(8), P. 7250 - 7250

Published: April 14, 2023

Sucrose nonfermenting 2 (Snf2) family proteins are the core component of chromatin remodeling complexes that can alter structure and nucleosome position by utilizing energy ATP, playing a vital role in transcription regulation, DNA replication, damage repair. Snf2 have been characterized various species including plants, they found to regulate development stress responses Arabidopsis. Soybean (Glycine max) is an important food economic crop worldwide, unlike other non-leguminous crops, soybeans form symbiotic relationship with rhizobia for biological nitrogen fixation. However, little known about soybean. In this study, we identified 66 genes soybean could be classified into six groups like Arabidopsis, unevenly distributed on 20 chromosomes. Phylogenetic analysis Arabidopsis revealed these divided 18 subfamilies. Collinear showed segmental duplication was main mechanism expansion rather than tandem repeats. Further evolutionary indicated duplicated gene pairs had undergone purifying selection. All contained seven domains, each protein at least one SNF2_N domain Helicase_C domain. Promoter most cis-elements associated jasmonic acid, abscisic nodule specificity their promoter regions. Microarray data real-time quantitative PCR (qPCR) expression profiles were detected both root tissues, some them significantly downregulated after rhizobial infection. conducted comprehensive demonstrated responsiveness Rhizobia This provides insight potential roles nodulation.

Language: Английский

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NF‐YCs modulate histone variant H2A.Z deposition to regulate photomorphogenic growth in Arabidopsis

Journal of Integrative Plant Biology, Journal Year: 2021, Volume and Issue: 63(6), P. 1120 - 1132

Published: May 4, 2021

Abstract In plants, light signals trigger a photomorphogenic program involving transcriptome changes, epigenetic regulation, and inhibited hypocotyl elongation. The evolutionarily conserved histone variant H2A.Z, which functions in transcriptional is deposited chromatin by the SWI2/SNF2‐RELATED 1 complex (SWR1c). However, role of H2A.Z photomorphogenesis its deposition mechanism remain unclear. Here, we show that Arabidopsis thaliana , at target loci induced irradiation via NUCLEAR FACTOR‐Y, subunit C (NF‐YC) proteins, thereby inhibiting growth. NF‐YCs physically interact with ACTIN‐RELATED PROTEIN6 (ARP6), key component SWR1c essential for depositing light‐dependent manner. ARP6 function together as negative regulators growth their genes during photomorphogenesis. Our findings reveal an important provide insights into novel transcription regulatory node mediates to control plant response changing conditions.

Language: Английский

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Comparative Expression Profiling of Snf2 Family Genes During Reproductive Development and Stress Responses in Rice

Frontiers in Plant Science, Journal Year: 2022, Volume and Issue: 13

Published: May 31, 2022

Sucrose non-fermenting 2 (Snf2) protein family, as chromatin remodeling factors, is an enormous and the most diverse which contributes to biological processes of replication, transcription, DNA repair using energy adenosine triphosphate (ATP) hydrolysis. The members Snf2 family proteins have been well characterized in Arabidopsis, rice, tomato. Although this received significant attention, few genes were identified uniquely for their roles mediating reproductive development stress tolerance rice. In present study, we comprehensively analyzed expression profiling during biotic/abiotic stresses. Our results showed that five (OsCHR712/715/720/726/739) mainly localized nucleus, while OsCHR715/739 also slightly expressed cell membrane. There abundant cis-acting elements putative promoter genes, including dehydration, MeJA, MYB binding site drought, ABA-responsive, stress-responsive element. Most induced immediately after Magnaporthe oryzae infection at 12 h post-infection (hpi). About 55% total upregulated under salt drought stresses entire time, 22-35% 3 h. It was noteworthy seven (OsCHR705, OsCHR706, OsCHR710, OsCHR714, OsCHR721, OsCHR726, OsCHR737) upregulated, one gene (OsCHR712) downregulated stresses, respectively. deficiency OsCHR726 mutations displayed a hypersensitive phenotype stress. These will be significantly useful features validation rice facilitate understanding genetic engineering crops with improved biotic abiotic

Language: Английский

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