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Plant Cell

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https://www.readbyqxmd.com/read/28100709/the-arabidopsis-ring-type-e3-ligase-tear1-controls-leaf-development-by-targeting-the-tie1-transcriptional-repressor-for-degradation
#1
Jinzhe Zhang, Baoye Wei, Rongrong Yuan, Jianhui Wang, Mingxin Ding, Zhuoyao Chen, Hao Yu, Genji Qin
The developmental plasticity of leaf size and shape is important for leaf function and plant survival. However, the mechanisms by which plants form diverse leaves in response to environmental conditions are not well understood. Here, we identified TIE1-ASSOCIATED RING-TYPE E3 LIGASE 1 (TEAR1), and found that it regulates leaf development by promoting the degradation of TCP INTERACTOR-CONTAINING EAR MOTIF PROTEIN 1 (TIE1), an important repressor of CINCINNATA (CIN)-like TEOSINTE BRANCHED1/CYCLOIDEA/PCF (TCP) transcription factors, which are key for leaf development...
January 18, 2017: Plant Cell
https://www.readbyqxmd.com/read/28100708/the-origin-of-floral-organ-identity-quartets
#2
Philip Ruelens, Zhicheng Zhang, Hilda van Mourik, Steven Maere, Kerstin Kaufmann, Koen Geuten
The origin of flowers has puzzled plant biologists ever since Darwin referred to their sudden appearance in the fossil record as an abominable mystery. Flowers are considered to be an assembly of protective, attractive and reproductive male and female leaf-like organs. Their origin cannot be understood by a morphological comparison to gymnosperms, their closest relatives, which develop separate male or female cones. Despite these morphological differences, gymnosperms and angiosperms possess a similar genetic toolbox consisting of phylogenetically related MADS-domain proteins...
January 18, 2017: Plant Cell
https://www.readbyqxmd.com/read/28100707/the-rla1-smos1-transcription-factor-functions-with-osbzr1-to-regulate-brassinosteroid-signaling-and-rice-architecture
#3
Shenglong Qiao, Shiyong Sun, Linlin Wang, Zhihua Wu, Chengxiang Li, Xiaoming Li, Tao Wang, Linna Leng, Weisheng Tian, Tiegang Lu, Xuelu Wang
Brassinosteroids (BRs) are plant-specific steroid hormones that control plant growth and development. Recent studies have identified key components of the BR signaling pathway in Arabidopsis thaliana and in rice (Oryza sativa); however, the mechanism of BR signaling in rice, especially downstream of GSK3/SHAGGY-like kinase (GSK2), remains unclear. Here we identified a BR-insensitive rice mutant, reduced leaf angle 1 (rla1), and cloned the corresponding gene. RLA1 was identical to the previously reported SMALL ORGAN SIZE 1 (SMOS1) which was cloned from another allele...
January 18, 2017: Plant Cell
https://www.readbyqxmd.com/read/28100706/oscul3a-negatively-regulates-cell-death-and-immunity-by-degrading-osnpr1-in-rice
#4
Qun-En Liu, Yuese Ning, Yingxin Zhang, Ning Yu, Chunde Zhao, Xiaodeng Zhan, Weixun Wu, Daibo Chen, Xiangjin Wei, Guo-Liang Wang, Shihua Cheng, Liyong Cao
Cullin3-based RING E3 ubiquitin ligases (CRL3), composed of Cullin3 (CUL3), RBX1, and BTB proteins, are involved in plant immunity but the function of CUL3 in the process is largely unknown. Here, we show that rice OsCUL3a is important for the regulation of cell death and immunity. The rice lesion mimic mutant oscul3a displays a significant increase in the accumulation of flg22- and chitin-induced reactive oxygen species, and in pathogenesis-related gene expression as well as resistance to Magnaporthe oryzae and Xanthomonas oryzae pv...
January 18, 2017: Plant Cell
https://www.readbyqxmd.com/read/28100705/fine-tuning-plant-growth-in-the-face-of-drought
#5
Kathleen L Farquharson
No abstract text is available yet for this article.
January 18, 2017: Plant Cell
https://www.readbyqxmd.com/read/28087831/a-tale-of-two-cenpcs-centromere-localization-of-kinetochore-null-2-and-cenp-c
#6
Jennifer Mach
No abstract text is available yet for this article.
January 13, 2017: Plant Cell
https://www.readbyqxmd.com/read/28087830/recognition-of-the-magnaporthe-oryzae-effector-avr-pia-by-the-decoy-domain-of-the-rice-nlr-immune-receptor-rga5
#7
Diana Ortiz, Karine De Guillen, Stella Cesari, Véronique Chalvon, Jérome Gracy, André Padilla, Thomas Kroj
Nucleotide-binding domain and leucine-rich repeat proteins (NLRs) are important receptors in plant immunity that allow recognition of pathogen effectors. The rice NLR RGA5 recognizes the Magnaporthe oryzae effector AVR-Pia through direct interaction. Here, we gained detailed insights into the molecular and structural bases of AVR-Pia-RGA5 interaction and the role of the RATX1 decoy domain of RGA5. NMR titration combined with in vitro and in vivo protein-protein interaction analyses identified the AVR-Pia interaction surface that binds to the RATX1 domain...
January 13, 2017: Plant Cell
https://www.readbyqxmd.com/read/28087829/tracheophytes-contain-conserved-orthologs-of-a-basic-helix-loop-helix-transcription-factor-to-modulate-root-hair-specific-genes
#8
Youra Hwang, Hee-Seung Choi, Hyun-Min Cho, Hyung-Taeg Cho
ROOT HAIR SPECIFIC (RHS) genes, which contain the root hair-specific cis-element (RHE) in their regulatory regions, function in root hair morphogenesis. Here, we demostrate that an Arabidopsis thaliana basic helix-loop-helix transcription factor, ROOT HAIR DEFECTVE SIX-LIKE 4 (RSL4), directly binds to the RHE in vitro and in vivo, up-regulates RHS genes, and stimulates root hair formation in Arabidopsis. Orthologs of RSL4 from a eudicot (poplar, Populus trichocarpa), a monocot (rice, Oryza sativa), and a lycophyte (Selaginella moellendorffii) each restored root hair growth in the Arabidopsis rsl4 mutant...
January 13, 2017: Plant Cell
https://www.readbyqxmd.com/read/28082384/the-rice-receptor-like-kinases-dwarf-and-runtish-spikelet1-and-2-repress-cell-death-and-affect-sugar-utilization-in-reproductive-development
#9
Cuixia Pu, Yongfeng Han, Shu Zhu, Fengyan Song, Ying Zhao, Chunyan Wang, Yongcun Zhang, Qian Yang, Jiao Wang, Shuolei Bu, Lijing Sun, Shengwei Zhang, Suqiao Zhang, Daye Sun, Ying Sun
Cell-cell communication precisely controls the creation of new organs during reproductive growth. However, the sensor molecules that mediate developmental signals in monocot plants are poorly understood. Here, we report that DWARF AND RUNTISH SPIKELET1 (DRUS1) and DRUS2, two closely related receptor-like kinases (RLKs), redundantly control reproductive growth and development in Oryza sativa (rice). A drus1-1 drus2 double knockout mutant, but not either single mutant, showed extreme dwarfism and barren inflorescences that harbored sterile spikelets...
January 12, 2017: Plant Cell
https://www.readbyqxmd.com/read/28082383/more-than-window-dressing-revealing-5-methylcytocine-patterns-that-decorate-arabidopsis-rna
#10
Jennifer A Lockhart
No abstract text is available yet for this article.
January 12, 2017: Plant Cell
https://www.readbyqxmd.com/read/28062752/arabidopsis-seed-mitochondria-are-bioenergetically-active-immediately-upon-imbibition-and-specialize-via-biogenesis-in-preparation-for-autotrophic-growth
#11
Gael Paszkiewicz, Jose Manuel Gualberto, Abdelilah Benamar, David Macherel, David C Logan
Seed germination is a vital developmental transition for production of progeny by sexual reproduction in spermatophytes. Quiescent cells in non-dormant dry embryos are reawakened first by imbibition and then by perception of germination triggers. Reanimated tissues enter into a germination program requiring energy for expansion growth. However, germination requires that embryonic tissues develop to support the more energy-demanding processes of cell division and organogenesis of the new seedling. Reactivation of mitochondria to supply the required energy is thus a key process underpinning germination and seedling survival...
January 6, 2017: Plant Cell
https://www.readbyqxmd.com/read/28062751/transcriptome-wide-mapping-of-rna-5-methylcytosine-in-arabidopsis-mrnas-and-non-coding-rnas
#12
Rakesh David, Alice Burgess, Brian Parker, Jun Li, Kalinya Pulsford, Tennille Sibbritt, Thomas Preiss, Iain R Searle
Post-transcriptional methylation of RNA cytosine residues to 5-methylcytosine (m5C) is an important modification with diverse roles, such as regulating stress responses, stem cell proliferation, and RNA metabolism. Here, we used RNA bisulfite sequencing (bsRNA-seq) for transcriptome-wide quantitative mapping of m5C in the model plant, Arabidopsis thaliana. We discovered more than a thousand m5C sites in Arabidopsis mRNAs, long non-coding RNAs, and other non-coding RNAs across three tissue types (siliques, seedling shoots, and roots) and validated a number of these sites...
January 6, 2017: Plant Cell
https://www.readbyqxmd.com/read/28062750/uuat1-is-a-golgi-localized-udp-uronic-acid-transporter-that-modulates-the-polysaccharide-composition-of-arabidopsis-seed-mucilage
#13
Susana Saez-Aguayo, Carsten Rautengarten, Henry Temple, Dayan Sanhueza, Troy Ejsmentewicz, Omar Sandoval-Ibañez, Daniela Alejandra Doñas-Cofré, Juan Pablo Parra-Rojas, Berit Ebert, Arnaud Lehner, Jean-Claude Mollet, Paul Dupree, Henrik V Scheller, Joshua L Heazlewood, Francisca C Reyes, Ariel Orellana
UDP-glucuronic acid (UDP-GlcA) is the precursor of many plant cell wall polysaccharides, and is required for production of seed mucilage. Following synthesis in the cytosol, it is transported into the lumen of the Golgi apparatus, where it is converted to UDP-galacturonic acid (UDP-GalA), UDP-arabinose and UDP-xylose. To identify the Golgi-localized UDP-GlcA transporter, we screened Arabidopsis thaliana mutants in genes coding for putative nucleotide sugar transporters for altered seed mucilage, a structure rich in the GalA-containing polysaccharide rhamnogalacturonan I...
January 6, 2017: Plant Cell
https://www.readbyqxmd.com/read/28062749/targeting-of-a-thaliana-knl2-to-centromeres-depends-on-the-conserved-cenpc-k-motif-in-its-c-terminus
#14
Michael Sandmann, Paul Talbert, Dmitri Demidov, Markus Kuhlmann, Twan Rutten, Udo Conrad, Inna Lermontova
KNL2 (KINETOCHORE NULL 2) is involved in recognition of centromeres and in centromeric localization of the centromere-specific histone cenH3. Our study revealed a cenH3 nucleosome-binding CENPC-k motif at the C-terminus of Arabidopsis thaliana KNL2, which is conserved among a wide spectrum of eukaryotes. Centromeric localization of KNL2 is abolished by deletion of the CENPC-k motif and by mutating single conserved amino acids, but can be restored by insertion of the corresponding motif of A. thaliana CENP-C...
January 6, 2017: Plant Cell
https://www.readbyqxmd.com/read/28011694/wind1-promotes-shoot-regeneration-through-transcriptional-activation-of-enhancer-of-shoot-regeneration1-in-arabidopsis
#15
Akira Iwase, Hirofumi Harashima, Momoko Ikeuchi, Bart Rymen, Mariko Ohnuma, Shinichiro Komaki, Kengo Morohashi, Tetsuya Kurata, Masaru Nakata, Masaru Ohme-Takagi, Erich Grotewold, Keiko Sugimoto
Many plant species display remarkable developmental plasticity and regenerate new organs after injury. Local signals produced by wounding are thought to trigger organ regeneration but molecular mechanisms underlying this control remain largely unknown. We previously identified an AP2/ERF transcription factor WOUND INDUCED DEDIFFERENTIATION 1 (WIND1) as a central regulator of wound-induced cellular reprogramming in plants. In this study, we demonstrate that WIND1 promotes callus formation and shoot regeneration by up-regulating the expression of the ENHANCER OF SHOOT REGENERATION1 (ESR1) gene, which encodes another AP2/ERF transcription factor in Arabidopsis...
December 23, 2016: Plant Cell
https://www.readbyqxmd.com/read/28011693/protein-phosphatase-2cs-and-microtubule-associated-stress-protein-1-control-microtubule-stability-plant-growth-and-drought-response
#16
Govinal Badiger Bhaskara, Tuan-Nan Wen, Thao Thi Nguyen, Paul E Verslues
Plant growth is coordinated with environmental factors, including water availability during times of drought. Microtubules influence cell expansion; however, the mechanisms by which environmental signals impinge upon microtubule organization and whether microtubule-related factors limit growth during drought remains unclear. We found that three Clade E Growth-Regulating (EGR) type 2 C protein phosphatases act as negative growth regulators to restrain growth during drought. Quantitative phosphoproteomics indicated that EGRs target cytoskeleton and plasma membrane-associated proteins...
December 23, 2016: Plant Cell
https://www.readbyqxmd.com/read/28011692/different-endomembrane-trafficking-pathways-establish-apical-and-basal-polarities
#17
Ruixi Li, Cecilia Rodriguez Furlan, Junqi Wang, Wilhelmina van de Ven, Ting Gao, Natasha V Raikhel, Glenn R Hicks
The endomembrane system is an interconnected network required to establish signal transduction, cell polarity and cell shape in response to developmental or environmental stimuli. In the model plant Arabidopsis thaliana, there are numerous markers to visualize polarly localized plasma membrane proteins utilizing endomembrane trafficking. Previous studies have shown that the large ARF-GEF GNOM plays a key role in the establishment of basal polarity, whereas the apically polarized membrane proteins undergo sorting via different routes...
December 23, 2016: Plant Cell
https://www.readbyqxmd.com/read/28011691/correction-phylobiochemical-characterization-of-prephenate-aminotransferases-reveals-evolution-of-the-plant-arogenate-phenylalanine-pathway
#18
https://www.readbyqxmd.com/read/28011690/induced-genome-wide-binding-of-three-arabidopsis-wrky-transcription-factors-during-early-mamp-triggered-immunity
#19
Rainer P Birkenbihl, Barbara Kracher, Imre E Somssich
During microbial-associated molecular pattern (MAMP)-triggered immunity (MTI) molecules derived from microbes are perceived by cell surface receptors and upon signaling to the nucleus initiate a massive transcriptional reprogramming critical to mount an appropriate host defense response. WRKY transcription factors play an important role in regulating these transcriptional processes. Here, we determined on a genome-wide scale the flg22-induced in vivo DNA-binding dynamics of three of the most prominent WRKY factors, WRKY18, WRKY40 and WRKY33...
December 23, 2016: Plant Cell
https://www.readbyqxmd.com/read/27986897/it-was-a-great-green-year-identification-of-a-chlorophyll-dephytylase-that-functions-in-chlorophyll-turnover
#20
Jennifer Mach
No abstract text is available yet for this article.
December 16, 2016: Plant Cell
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