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| Open AccessCopine proteins are required for brassinosteroid signaling in maize and Arabidopsis
Brassinosteroids play vital role in plant growth and development. Here, the authors demonstrate that the plasma membrane-associated copine proteins are new components required for the receptor complex functioning in BR signaling in maize and Arabidopsis.
- Teng Jing
- , Yuying Wu
- & Mingyue Gou
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Article
| Open AccessNatural variation in BnaA9.NF-YA7 contributes to drought tolerance in Brassica napus L
Rapeseed production is often threatened by drought stress. Here, the authors report transcription factor BnaA9.NFYA7 negatively regulates rapeseed drought tolerance through ABA signal transduction pathway via feedback inhibition of the expression of BnaABF3/4s-related genes.
- Jia Wang
- , Lin Mao
- & Liezhao Liu
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Article
| Open AccessCore clock genes adjust growth cessation time to day-night switches in poplar
Alique et al. show that poplar trees adjust their seasonal growth timing by finely tuning the daily expression level of the photoperiodic integrator FT2 through a mechanism governed by the circadian clock’s core genes.
- Daniel Alique
- , Arturo Redondo López
- & Mariano Perales
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Article
| Open AccessPhosphorylation of Arabidopsis UVR8 photoreceptor modulates protein interactions and responses to UV-B radiation
This paper reports that the Arabidopsis UV-B photoreceptor UVR8 is phosphorylated in vivo and that phosphorylation of Serine 402 modifies UVR8 activity and promotes flavonoid biosynthesis, a key response to UV-B exposure.
- Wei Liu
- , Giovanni Giuriani
- & Gareth I. Jenkins
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Article
| Open AccessEvolutionary trajectory of pattern recognition receptors in plants
Plant cell-surface receptors perceive both self- and nonself-molecules to regulate biological processes. Here the authors show that a subclass of phytohormone and immune receptors share a common origin, which have diverged to perceive distinct ligands and activate differential downstream responses.
- Bruno Pok Man Ngou
- , Michele Wyler
- & Ken Shirasu
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Article
| Open AccessIMA peptides regulate root nodulation and nitrogen homeostasis by providing iron according to internal nitrogen status
The authors show IRON MAN peptides have an essential role in symbiotic nitrogen fixation during legume-rhizobium symbiosis. The peptides additionally function to regulate nitrogen homeostasis by controlling nitrogen-iron balance.
- Momoyo Ito
- , Yuri Tajima
- & Takuya Suzaki
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Article
| Open AccessThe mechanism of low blue light-induced leaf senescence mediated by GmCRY1s in soybean
This study provides insights into how shade induces leaf senescence in soybean. The reduction of blue light intensity deactivates GmCRY1s, leading to the degradation of GmRGAs and the upregulation of WRKY100, ultimately promoting leaf senescence.
- Zhuang Li
- , Xiangguang Lyu
- & Bin Liu
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Article
| Open AccessBPG4 regulates chloroplast development and homeostasis by suppressing GLK transcription factors and involving light and brassinosteroid signaling
The authors identify BPG4, a novel regulator of chloroplast development. BPG4 directly suppresses transcriptional activity of GLK to fine-tune photosynthesis associated nuclear gene expression, and regulates chloroplast development and homeostasis.
- Ryo Tachibana
- , Susumu Abe
- & Takeshi Nakano
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Article
| Open AccessA micro RNA mediates shoot control of root branching
Plant shoots and roots act in concert to ensure access to soil nutrients by adapting root growth. The manuscript identifies a key shoot signal, a mobile micro RNA, that systemically controls lateral root initiation to optimize nitrate supply.
- Moritz Sexauer
- , Hemal Bhasin
- & Katharina Markmann
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Article
| Open AccessNitric oxide controls shoot meristem activity via regulation of DNA methylation
The authors show that gaseous Nitric Oxide (NO) promotes transit amplifying cell fate in the Arabidopsis shoot meristem. NO acts by modifying AGO4-WUSCHEL protein interactions in stem cells, directly linking NO signaling with DNA methylation.
- Jian Zeng
- , Xin’Ai Zhao
- & Jan U. Lohmann
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Article
| Open AccessTwo subtypes of GTPase-activating proteins coordinate tip growth and cell size regulation in Physcomitrium patens
Using the moss Physcomitrium patens, the authors reveal that PpRopGAPs and PpRenGAP redundantly regulate tip growth by inactivating ROP GTPases and influencing their membrane organization. They display distinct GAP activities and binding capacities to ROPs and oppositely regulate cell width when overexpressed.
- Jingtong Ruan
- , Linyu Lai
- & Peishan Yi
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Article
| Open AccessShade-induced RTFL/DVL peptides negatively regulate the shade response by directly interacting with BSKs in Arabidopsis
Shade avoidance responses help plants to compete with neighbors for light. Here, the authors show that low R:FR-induced RTFLs interact with BSK3/6 and reduce the protein levels of PIF4 to prevent exaggerated shade avoidance responses.
- Sha Huang
- , Yu Ma
- & Lin Li
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Article
| Open AccessN-hydroxypipecolic acid triggers systemic acquired resistance through extracellular NAD(P)
Systemic acquired resistance (SAR) is a plant immune response triggered by mobile signals generated at the primary infection site. Here the authors show that one such mobile signal, N-hydroxypipecolic acid, can trigger production of eNAD(P) that activates SAR through the LecRK-VI.2 receptor.
- Qi Li
- , Mingxi Zhou
- & Zhonglin Mou
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Article
| Open AccessGreen leaf volatile sensory calcium transduction in Arabidopsis
Plants sense volatiles emitted by injured neighboring plants and elicit defense responses to external threats. Here, the authors show that Arabidopsis leaves uptake two green leaf volatiles via stomata and trigger cytosolic Ca2+ defense signaling.
- Yuri Aratani
- , Takuya Uemura
- & Masatsugu Toyota
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Article
| Open AccessMechanodetection of neighbor plants elicits adaptive leaf movements through calcium dynamics
Pantazopoulou et al. discovered that leaves sense neighbors by mutual touching of hairs on their surface, called trichomes. Using fluorescent biosensors, they show that this triggers a calcium wave to activate leaf movement away from competitors
- Chrysoula K. Pantazopoulou
- , Sara Buti
- & Ronald Pierik
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Article
| Open AccessAutophagy promotes jasmonate-mediated defense against nematodes
Autophagy plays a critical role in plant immunity. Here the authors show that in tomato, autophagy promotes defense against root-knot nematodes by promoting degradation of negative regulators of jasmonic acid signaling.
- Jinping Zou
- , Xinlin Chen
- & Jie Zhou
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Article
| Open AccessBIK1 protein homeostasis is maintained by the interplay of different ubiquitin ligases in immune signaling
The cytoplasmic kinase BIK1 plays a central role in immune signaling and its protein homeostasis is maintained by the interplay of the ubiquitin ligases RGLG1/2 and PUB25 - RGLG1/2 suppress PUB25-mediated BIK1 protein degradation.
- Jiaojiao Bai
- , Yuanyuan Zhou
- & Dongping Lu
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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 AccessMG1 interacts with a protease inhibitor and confers resistance to rice root-knot nematode
Rice root-knot nematode is a major threat to rice production. Here, the authors identify an R gene MG1 in rice that confers resistance against nematodes and encodes a protein that interacts with a protease inhibitor.
- Xiaomin Wang
- , Rui Cheng
- & Xiaoli Guo
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Article
| Open AccessFertilization controls tiller numbers via transcriptional regulation of a MAX1-like gene in rice cultivation
Here the authors show that fertilization controls rice tiller numbers through the transcription of a rice MAX1-like gene involved in strigolactone biosynthesis. Promoter variation lines have the potential to improve yield when fertilizer is limited.
- Jinying Cui
- , Noriko Nishide
- & Takeshi Izawa
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Article
| Open AccessPXL1 and SERKs act as receptor–coreceptor complexes for the CLE19 peptide to regulate pollen development
CLE19 is a secreted peptide required for pollen development and other processes in Arabidopsis. Here the authors show that PXL1 and SERKs act as receptors and co-receptors for CLE19 and regulate tapetum transcriptional networks that promote pollen development.
- Ying Yu
- , Wen Song
- & Fang Chang
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Article
| Open AccessThe COG1-OsSERL2 complex senses cold to trigger signaling network for chilling tolerance in japonica rice
Improvement of chilling tolerance is a key strategy in rice production. Here the authors report that the QTL gene COG1 confers chilling tolerance in japonica rice. COG1 interacts and activates OsSERL2 to transmit the cold signal for chilling defense.
- Changxuan Xia
- , Guohua Liang
- & Yunyuan Xu
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Article
| Open AccessDifferent viral effectors suppress hormone-mediated antiviral immunity of rice coordinated by OsNPR1
Plant viruses have evolved various virulence strategies to overcome plant immunity. Here the authors show that distinct viral proteins repress JA-SA crosstalk by targeting rice NPR1 protein to facilitate viral infection
- Hehong Zhang
- , Fengmin Wang
- & Zongtao Sun
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Article
| Open AccessThe thioesterase APT1 is a bidirectional-adjustment redox sensor
Cellular redox homeostasis is important when responding to environmental changes. Here, the authors demonstrate APT1 is a redox sensor in plant defense and identify a pathway for oxidative stress resistance.
- Tuo Ji
- , Lihua Zheng
- & Tao Wang
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Article
| Open AccessWidening the landscape of transcriptional regulation of green algal photoprotection
A consensus genome-scale gene regulatory network reconstruction allows dissection of the transcriptional regulation of microalgal responses to light and carbon availability and discovery of novel regulators of photoprotection and CO2 acquisition.
- Marius Arend
- , Yizhong Yuan
- & Dimitris Petroutsos
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Article
| Open AccessDouble DAP-seq uncovered synergistic DNA binding of interacting bZIP transcription factors
Here, the authors describe a new method to study how some proteins work together to control gene activity. They show that certain protein pairs can recognize new DNA sequences that they can’t recognize individually and control a wider range of genes.
- Miaomiao Li
- , Tao Yao
- & Shao-shan Carol Huang
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Article
| Open AccessLight-independent regulation of algal photoprotection by CO2 availability
Photosynthetic algae have evolved to survive in suboptimal light and CO2 conditions. Here, the authors show that depletion of CO2 can drive photoprotection and carbon acquisition even in the absence of light, that was previously believed to be indispensable for the activation of these processes.
- M. Águila Ruiz-Sola
- , Serena Flori
- & Dimitris Petroutsos
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Article
| Open AccessCEP peptide and cytokinin pathways converge on CEPD glutaredoxins to inhibit root growth
C-terminally encoded peptide (CEP) and cytokinin (CK) hormones modulate plant root architecture in response to environmental cues. The results show that CEP and CK pathways utilise CEPD glutaredoxins in separate organs to curb primary root growth.
- Michael Taleski
- , Kelly Chapman
- & Michael A. Djordjevic
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Article
| Open AccessOptimization of rice panicle architecture by specifically suppressing ligand–receptor pairs
Rice panicle architecture dominates grain yield. In this study, the authors demonstrate a method for rationally overcoming the trade-off between yield traits and optimizing rice panicle architecture by specifically manipulating ligand–receptor pairs.
- Tao Guo
- , Zi-Qi Lu
- & Hong-Xuan Lin
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Article
| Open AccessMicroRNA156 conditions auxin sensitivity to enable growth plasticity in response to environmental changes in Arabidopsis
Plants respond to light and temperature changes via the photoreceptor phytochrome B and the phytohormone auxin. Here the authors reveal microRNA156 as a previously uncharacterized developmental signal that gates environmentally regulated plant growth by licensing auxin sensitivity.
- Qing Sang
- , Lusheng Fan
- & Xuemei Chen
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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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Article
| Open AccessAllelic variation of TaWD40-4B.1 contributes to drought tolerance by modulating catalase activity in wheat
Drought stress limits wheat production around the world. Here, the authors report allelic variation of a WD40 encoding gene TaWD40-4B.1 contributes to wheat drought tolerance by interacting with canonical catalases as a chaperone to promote their activities to avoid ROS over accumulation.
- Geng Tian
- , Shubin Wang
- & Mengcheng Wang
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Article
| Open AccessEpidermal injury-induced derepression of key regulator ATML1 in newly exposed cells elicits epidermis regeneration
In many plants, only the outermost cells are specified into the epidermis, with underlying mechanisms unknown. Here, the authors show that a key epidermis identity gene is activated in surface cells, via positional cues involving mechanical signals.
- Hiroyuki Iida
- , Ari Pekka Mähönen
- & Shinobu Takada
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Article
| Open AccessCross-stress gene expression atlas of Marchantia polymorpha reveals the hierarchy and regulatory principles of abiotic stress responses
How plants respond to multiple stresses occurring simultaneously is poorly understood. Here the authors describe how gene expression in Marchantia polymorpha responds to different combinations of seven abiotic stresses and provide online resources to facilitate data visualization and usability.
- Qiao Wen Tan
- , Peng Ken Lim
- & Marek Mutwil
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Article
| Open AccessPotassium nutrient status drives posttranslational regulation of a low-K response network in Arabidopsis
Potassium is essential for plant growth and development. Here the authors present evidence that plants respond to low potassium availability by modulating the abundance and phosphorylation status of proteins in CBL-CIPK-channel modules.
- Kun-Lun Li
- , Ren-Jie Tang
- & Sheng Luan
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Article
| Open AccessEthylene-triggered subcellular trafficking of CTR1 enhances the response to ethylene gas
Park et al. show that upon exposure to ethylene gas, CTR1, which normally has a negative effect on ethylene signaling, translocates into the nucleus and enhances the plant’s response to ethylene by stabilizing the EIN3 transcription factor.
- Hye Lin Park
- , Dong Hye Seo
- & Gyeong Mee Yoon
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Article
| Open AccessInsights into the mechanism of phospholipid hydrolysis by plant non-specific phospholipase C
Non-specific phospholipase C (NPC) is a plant-specific phospholipid-hydrolyzing enzyme. Here, the authors define the molecular basis of how Arabidopsis NPC works, and provide new mechanistic insights into the members of phospholipase family.
- Ruyi Fan
- , Fen Zhao
- & Zhu Liu
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Article
| Open AccessStructural mechanism of signal transduction in a phytochrome histidine kinase
In this study, authors have solved cryo-EM structures of a bacteriophytochrome in its dark-adapted and illuminated states. The structures reveal the structural mechanism for photoactivation of the phytochrome.
- Weixiao Yuan Wahlgren
- , Elin Claesson
- & Sebastian Westenhoff
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Article
| Open AccessThe B-type response regulator GmRR11d mediates systemic inhibition of symbiotic nodulation
Cytokinin is essential for regulation of nodulation. Here, the authors identified a B-type response regulator GmRR11d that governs a transcriptional program associated with nodulation and cytokinin activation essential for systemic regulation of nodulation.
- Jiahuan Chen
- , Zhijuan Wang
- & Xia Li
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Article
| Open AccessAnterograde signaling controls plastid transcription via sigma factors separately from nuclear photosynthesis genes
Photoreceptors in the nucleus control plastid transcription by utilizing sigma factors as nucleus-to-plastid signals in parallel with the light regulation of nuclear photosynthesis genes.
- Youra Hwang
- , Soeun Han
- & Meng Chen
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Article
| Open AccessCRY2 interacts with CIS1 to regulate thermosensory flowering via FLM alternative splicing
CRY2 mediates photoperiod-responsive floral initiation in Arabidopsis. Here the authors show that CRY2 also regulates temperature sensitive flowering and that CRY2 can interact with and regulate the splicing factor CIS1 to affect alternative splicing of transcripts that regulate flowering.
- Zhiwei Zhao
- , Craig Dent
- & Hongtao Liu
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Article
| Open AccessIndependently evolved viral effectors convergently suppress DELLA protein SLR1-mediated broad-spectrum antiviral immunity in rice
Plant viruses adopt diverse strategies to inhibit host antiviral defense. Here the authors show that multiple different effectors from various rice viruses interfere with host gibberellin signaling by targeting the DELLA protein SLR1.
- Lulu Li
- , Hehong Zhang
- & Zongtao Sun
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Article
| Open AccessNutrient regulation of lipochitooligosaccharide recognition in plants via NSP1 and NSP2
Lipochitooligosaccharide (LCO) perception by legumes is required to establish symbiotic relationships with nitrogen fixing bacteria. Here the authors show that nutrient starvation can activate LCO perception in cereals to promote symbiotic association with arbuscular mycorrhizal fungi.
- Xin-Ran Li
- , Jongho Sun
- & Giles E. D. Oldroyd
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Article
| Open AccessPIF7 is a master regulator of thermomorphogenesis in shade
Plant hypocotyl elongation response to light and temperature. Here the authors show that shade combined with warm temperature synergistically enhances the hypocotyl growth response via the PIF7 transcription factor, auxin, and as yet unknown factor.
- Yogev Burko
- , Björn Christopher Willige
- & Joanne Chory
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Article
| Open AccessThe receptor kinase SRF3 coordinates iron-level and flagellin dependent defense and growth responses in plants
Iron homeostasis is known to influence plant immune signaling. Here the authors characterize SRF3, a receptor kinase that acts as a negative regulator of callose synthesis, that is required for root responses to iron deficiency and pathogen signals.
- Matthieu Pierre Platre
- , Santosh B. Satbhai
- & Wolfgang Busch
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Article
| Open AccessProbing strigolactone perception mechanisms with rationally designed small-molecule agonists stimulating germination of root parasitic weeds
Strigolactone agonists could potentially help control noxious weeds by promoting suicidal germination. Here the authors describe a series of small molecule agonists that stimulate germination via the Striga ShHTL7 receptor and show that stereochemistry and hydrolysis-independent signalling mediate potency.
- Dawei Wang
- , Zhili Pang
- & Zhen Xi
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Article
| Open AccessCooperative regulation of PBI1 and MAPKs controls WRKY45 transcription factor in rice immunity
The U-box type ubiquitin ligase PUB44 positively regulates pattern-triggered immunity in rice. Here the authors identify a PUB44 substrate whose degradation is required for activation of the WRKY45 transcription factor upon immune elicitation.
- Kota Ichimaru
- , Koji Yamaguchi
- & Tsutomu Kawasaki
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Article
| Open AccessPOD1-SUN-CRT3 chaperone complex guards the ER sorting of LRR receptor kinases in Arabidopsis
Cargo transport from the ER to the Golgi is highly selective. Here the authors identify three secretory pathway localized proteins that regulate ER sorting of receptor kinases in Arabidopsis and are required to support pollen tube growth.
- Yong Xue
- , Jiang-Guo Meng
- & Wei-Cai Yang
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Article
| Open AccessArabidopsis cryptochrome 2 forms photobodies with TCP22 under blue light and regulates the circadian clock
Cryptochrome signaling has been reported to regulate circadian oscillations in plants. Here the authors show that CRY2 and the TCP22 transcription factors can form photobodies in a blue light dependent manner and induce expression of CCA1, a core component of the circadian oscillator.
- Weiliang Mo
- , Junchuan Zhang
- & Zecheng Zuo