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| Open AccessArabidopsis TCP4 transcription factor inhibits high temperature-induced homeotic conversion of ovules
Global warming threatens food security and plant survival. This paper demonstrates that Class II TCP transcription factors are critical for specifying ovule identity and inhibiting the conversion of ovules into carpelloids under high temperature.
- Jingqiu Lan
- , Ning Wang
- & Genji Qin
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Article
| Open AccessDifferential CaKAN3-CaHSF8 associations underlie distinct immune and heat responses under high temperature and high humidity conditions
The authors reveal a mechanism in understanding the responses to Ralstonia solanacearum in pepper under high temperature and high humidity conditions, that is differential associations between transcription factors mediate distinct immune and heat responses.
- Sheng Yang
- , Weiwei Cai
- & Shuilin He
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Article
| Open AccessThe Arabidopsis endosperm is a temperature-sensing tissue that implements seed thermoinhibition through phyB
Piskurewicz et al. show that seed thermoinhibition is controlled by endospermic phytochrome B (phyB). High temperature decreases endospermic phyB signaling, which promotes DELLA- and PIFmediated endospermic ABA release that blocks germination.
- Urszula Piskurewicz
- , Maria Sentandreu
- & Luis Lopez-Molina
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| Open AccessThe 2018 European heatwave led to stem dehydration but not to consistent growth reductions in forests
Forest dynamics are monitored at large scales with remote sensing, but individual tree data are necessary for ground-truthing and mechanistic insights. This study on high temporal resolution dendrometer data across Europe reveals that the 2018 heatwave affected tree physiology and growth in unexpected way.
- Roberto L. Salomón
- , Richard L. Peters
- & Kathy Steppe
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| Open AccessWarm temperature triggers JOX and ST2A-mediated jasmonate catabolism to promote plant growth
Plants undergo morphological changes to enhance cooling at warm temperatures. Here Zhu et al. show that JOXs and ST2A enzymes, which mediate jasmonate catabolism, contribute to this process by reducing the level of bioactive jasmonate facilitating growth responses.
- Tingting Zhu
- , Cornelia Herrfurth
- & Ive De Smet
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| Open AccessH3K27me3 demethylases alter HSP22 and HSP17.6C expression in response to recurring heat in Arabidopsis
Acclimation to high temperature increases tolerance of heat shock in plants. Here the authors show that JUMONJI H3K27me3 demethylases are needed for heat acclimation in Arabidopsis and act at loci encoding HEAT SHOCK PROTEINS to facilitate induction upon heat stress.
- Nobutoshi Yamaguchi
- , Satoshi Matsubara
- & Toshiro Ito
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| Open AccessHeteromeric HSFA2/HSFA3 complexes drive transcriptional memory after heat stress in Arabidopsis
Moderate heat stress primes plants to acquire tolerance to subsequent, more severe heat stress. Here the authors show that the HSFA3 transcription factor forms a heteromeric complex with HSFA2 to sustain activated transcription of genes required for acquired thermotolerance by promoting H3K4 hyper-methylation.
- Thomas Friedrich
- , Vicky Oberkofler
- & Isabel Bäurle
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| Open AccessThe membrane-localized protein kinase MAP4K4/TOT3 regulates thermomorphogenesis
Plants respond to warmth via growth processes termed thermomorphogenesis. Here, via a phosphoproteomics approach, the authors show that the mitogen activated protein kinase TOT3 regulates thermomorphogenesis in both wheat and Arabidopsis and modifies brassinosteroid signaling in Arabidopsis.
- Lam Dai Vu
- , Xiangyu Xu
- & Ive De Smet
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Article
| Open AccessNatural variations of SLG1 confer high-temperature tolerance in indica rice
Understanding the mechanism of high-temperature tolerance will help to breed crops adaptive to warming climate. Here, the authors show SLG1, a cytosolic tRNA 2-thiolation protein 2 encoding gene, is differentiated between the two Asian cultivated rice subspecies and confers high temperature tolerance of indica rice.
- Yufang Xu
- , Li Zhang
- & Shanguo Yao
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Article
| Open AccessNatural antisense transcripts of MIR398 genes suppress microR398 processing and attenuate plant thermotolerance
MiRNAs and natural antisense transcripts can both regulate gene expression and plant development. Here, the authors show that cis-NATs to MIR398 repress processing of pri-miR398 and that cis-NAT expression is downregulated at high temperatures, contributing to miR398 mediated thermotolerance responses.
- Yajie Li
- , Xiaorong Li
- & Yuke He
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Article
| Open AccessHeat stress-induced transposon activation correlates with 3D chromatin organization rearrangement in Arabidopsis
Heat stress can activate heterochromatin-associated transposon elements (TEs). Here, the authors show that heat stress leads to global rearrangement of 3D genome and TEs activation closely correlates with 3D chromatin organization rearrangement in Arabidopsis.
- Linhua Sun
- , Yuqing Jing
- & Weiqiang Qian
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Article
| Open AccessDaytime temperature is sensed by phytochrome B in Arabidopsis through a transcriptional activator HEMERA
The phyB photoreceptor senses nighttime temperature in Arabidopsis plants cultivated in short-day photoperiods. Here the authors show that phyB can also promote thermomorphogenesis during constant light or the daytime, and acts via a HEMERA-dependent mechanism that promotes the activity and accumulation of PIF4.
- Yongjian Qiu
- , Meina Li
- & Meng Chen
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Article
| Open AccessTOC1–PIF4 interaction mediates the circadian gating of thermoresponsive growth in Arabidopsis
The PIF4 transcription factor mediates the response of Arabidopsis seedlings to elevated temperature. Here the authors show that PIF4 interacts with the circadian clock component TOC1 which acts to suppress the PIF4-mediated temperature response in the evening.
- Jia-Ying Zhu
- , Eunkyoo Oh
- & Zhi-Yong Wang
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Article
| Open AccessThe plastid metalloprotease FtsH6 and small heat shock protein HSP21 jointly regulate thermomemory in Arabidopsis
Exposure of plants to heat can promote increased tolerance to subsequent heat stress. Here, the authors show that prolonged expression of Arabidopsissmall heat shock protein HSP21 promotes this thermomemory effect and that HSP21 levels are regulated by the plastid metalloprotease FtsH6 during the memory period.
- Mastoureh Sedaghatmehr
- , Bernd Mueller-Roeber
- & Salma Balazadeh