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Plant Journal

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https://read.qxmd.com/read/31009161/overexpression-of-trans-golgi-network-t-snares-rescues-vacuolar-trafficking-and-tgn-morphology-defects-in-a-putative-tethering-factor-mutant
#1
Xiaochen Yang, Ching-Yi Liao, Jie Tang, Diane C Bassham
The trans-Golgi network (TGN) is a major site for sorting of cargo to either the vacuole orapoplast. The TGN-localized coiled-coil protein TNO1 is a putative tethering factor that interacts with the TGN t-SNARE SYP41 and is required for correct localization of the SYP61 t-SNARE. An Arabidopsis thalianatno1 mutant is hypersensitive to salt stress and partially mislocalizes vacuolar proteins to the apoplast, indicating a role in vacuolar trafficking. Here, we show that overexpression of SYP41 or SYP61 significantly increases SYP41-SYP61 complex formation in a tno1 mutant and rescues the salt sensitivity and defective vacuolar trafficking of the tno1 mutant...
April 22, 2019: Plant Journal
https://read.qxmd.com/read/31009159/a-unified-dna-sequence-and-non-dna-sequence-mapping-model-of-complex-traits
#2
Yanru Zeng, Xuli Zhu, Chixiang Chen, Kalins Banerjee, Lidan Sun, Weiwu Yu, Bingsong Zheng, Rongling Wu
Increasing evidence shows that quantitative inheritance is based on both DNA sequence and non-DNA sequence variants. However, how to simultaneously detect these variants from a mapping study has been unexplored, hampering our effort to illustrate the detailed genetic architecture of complex traits. We address this issue by developing a unified model of quantitative trait locus (QTL) mapping based on an open-pollinated design composed of randomly sampling maternal plants from a natural population and their half-sib seeds...
April 22, 2019: Plant Journal
https://read.qxmd.com/read/31009150/arabidopsis-and-sunflower-plants-with-increased-xylem-area-show-enhanced-seed-yield
#3
Julieta V Cabello, Raquel L Chan
Plant architecture plasticity determines the efficiency at harvesting and plays a major role defining biomass and seed yield. We observed that several previously described transgenic genotypes exhibiting increased seed yield show also wider stems and more vascular bundles than wild type plants. Here, the relationship between these characteristics and seed yield was investigated. Hanging weight on the main stem of Arabidopsis plants provoked a significant stem widening. Such widening was accompanied by an increase in the number of vascular bundles and about 100% of yield increase...
April 22, 2019: Plant Journal
https://read.qxmd.com/read/31009134/np-2-qtl-networking-phenotypic-plasticity-qtls-across-heterogeneous-environments
#4
Meixia Ye, Libo Jiang, Chixiang Chen, Xuli Zhu, Ming Wang, Rongling Wu
Despite its critical importance to our understanding of plant growth and adaptation, the question of how environment-induced plastic response is affected genetically remains elusive. Previous studies showed that the reaction norm of an organism across environmental index obeys the allometrical scaling law of part-whole relationships. The implementation of this phenomenon into functional mapping can characterize how quantitative trait loci (QTLs) modulate the phenotypic plasticity of complex traits to heterogeneous environments...
April 22, 2019: Plant Journal
https://read.qxmd.com/read/31009131/expression-and-function-of-the-bhlh-genes-alcatraz-and-spatula-in-selected-solanaceae-species
#5
Clara Inés Ortiz-Ramírez, Marco A Giraldo, Cristina Ferrándiz, Natalia Pabón-Mora
The genetic mechanisms underlying fruit development have been identified in Arabidopsis and have been comparatively studied in tomato as a representative of fleshy fruits. However comparative expression and functional analyses on the bHLH genes downstream the genetic network, ALCATRAZ (ALC) and SPATULA (SPT) which are involved in the formation of the dehiscence zone in Arabidopsis, have not been functionally studied in the Solanaceae. Here we perform detailed expression and functional studies of ALC/SPT homologs in Nicotiana obtusifolia with capsules, and Capsicum annuum and Solanum lycopersicum with berries...
April 22, 2019: Plant Journal
https://read.qxmd.com/read/31009129/wheat-ms5-male-sterility-is-induced-by-recessive-homoeologous-a-and-d-genome-non-specific-lipid-transfer-proteins
#6
Margaret A Pallotta, Patricia Warner, Allan Kouidri, Elise J Tucker, Mathieu Baes, Radoslaw Suchecki, Nathan Watson-Haigh, Takashi Okada, Melissa Garcia, Ajay Sandhu, Manjit Singh, Petra Wolters, Marc C Albertsen, A Mark Cigan, Ute Baumann, Ryan Whitford
Nuclear male-sterile mutants with non-conditional, recessive and strictly monogenic inheritance are useful for both hybrid and conventional breeding systems and have long been a research focus for many crops. In allohexaploid wheat however, genic redundancy results in rarity of such mutants, with the EMS-induced mutant ms5 among the few reported to date. Here, we identify TaMs5 as a glycosylphosphatidylinositol anchored lipid transfer protein required for normal pollen exine development, and by transgenic complementation demonstrate that TaMs5-A restores fertility to ms5...
April 22, 2019: Plant Journal
https://read.qxmd.com/read/31009127/full-length-mrna-sequencing-and-gene-expression-profiling-reveal-broad-involvement-of-natural-antisense-transcript-gene-pairs-in-pepper-development-and-response-to-stresses
#7
Jubin Wang, Yingtian Deng, Yingjia Zhou, Dan Liu, Huiyang Yu, Yuhong Zhou, Junheng Lv, Lijun Ou, Xuefeng Li, Yanqing Ma, Xiongze Dai, Feng Liu, Xuexiao Zou, Bo Ouyang, Feng Li
Pepper is an important vegetable with great economic value and unique biological features. In the past few years, significant development has been made towards understanding the huge complex pepper genome; however, pepper functional genomics has not been well studied. To better understand the pepper gene structure and pepper gene regulation, we conducted full-length mRNA sequencing by PacBio sequencing and obtained 57862 high-quality full-length mRNA sequences derived from 18362 previously annotated and 5769 newly detected genes...
April 22, 2019: Plant Journal
https://read.qxmd.com/read/31009122/the-myb-transcription-factor-ema1-stimulates-emission-of-methyl-anthranilate-from-medicago-truncatula-hairy-roots
#8
Jacob Pollier, Nathan De Geyter, Tessa Moses, Benoît Boachon, José Manuel Franco Zorrilla, Yuechen Bai, Elia Lacchini, Azra Gholami, Robin Vanden Bossche, Danièle Werck-Reichhart, Sofie Goormachtig, Alain Goossens
Plants respond to herbivore or pathogen attacks by activating specific defense programs that include the production of bioactive specialized metabolites to eliminate or deter the attackers. Volatiles play an important role in the interaction of a plant with its environment. Through transcript profiling of jasmonate-elicited Medicago truncatula cells we identified Emission of Methyl Anthranilate (EMA) 1, a MYB transcription factor that is involved in the emission of the volatile compound methyl anthranilate when expressed in M...
April 22, 2019: Plant Journal
https://read.qxmd.com/read/31009115/the-poly-a-polymerase-paps1-interacts-with-the-rna-directed-dna-methylation-pathway-in-sporophyte-and-pollen-development
#9
Yunming Zhang, Anna Ramming, Lisa Heinke, Lothar Altschmied, R Keith Slotkin, Jörg D Becker, Christian Kappel, Michael Lenhard
RNA-based processes play key roles in the regulation of eukaryotic gene expression. This includes both the processing of pre-mRNAs into mature mRNAs ready for translation and RNA-based silencing processes, such as RNA-directed DNA methylation (RdDM). Polyadenylation of pre-mRNAs is one important step in their processing and is carried out by three functionally specialized canonical nuclear poly(A) polymerases in Arabidopsis thaliana. Null-mutations in one of these, termed PAPS1, result in a male gametophytic defect...
April 22, 2019: Plant Journal
https://read.qxmd.com/read/31009114/the-assembly-of-vincadifformine-and-tabersonine-derived-monoterpenoid-indole-alkaloids-in-catharanthus-roseus-involve-separate-branch-pathways
#10
Danielle Williams, Yang Qu, Razvan Simionescu, Vincenzo De Luca
The biological activity of monoterpenoid indole alkaloids (MIAs) has led to discoveries for their use in cancer treatments and other medical applications. Their biosynthesis has involved formation of reactive intermediates used by responsible enzymes to elaborate several different chemical scaffolds. Modification of scaffolds through different substitution reactions has produced chemically diverse MIAs and related biological activities. The present study characterizes the 3-step pathway involved in the formation of (+)-echitovenine, the major O-acetylated MIA of Catharanthus roseus roots and differentiates it from a parallel pathway involved in the formation of hörhammericine...
April 22, 2019: Plant Journal
https://read.qxmd.com/read/31006149/maizenet-a-co-functional-network-for-network-assisted-systems-genetics-in-zea-mays
#11
Tak Lee, Sungho Lee, Sunmo Yang, Insuk Lee
Maize (Zea mays) has multiple uses in human food, animal fodder, starch and sweetener production, and as a biofuel, and is accordingly the most extensively cultivated cereal worldwide. To enhance maize production, genetic factors underlying important agricultural traits, including stress tolerance and flowering, have been explored through forward and reverse genetics approaches. Co-functional gene networks are systems biology resources useful in identifying trait-associated genes in plants by prioritizing candidate genes...
April 21, 2019: Plant Journal
https://read.qxmd.com/read/31004552/defective-leptotene-chromosome-1-dlc1-encodes-a-type-b-response-regulator-and-is-required-for-rice-meiosis
#12
Yang Tao, Dan Chen, Ting Zou, Jing Zeng, Fengyan Gao, Zhongshan He, Dan Zhou, Zhiyuan He, Guoqiang Yuan, Miaomiao Liu, Hongfeng Zhao, Qiming Deng, Shiquan Wang, Aiping Zheng, Jun Zhu, Yueyang Liang, Lingxia Wang, Ping Li, Shuangcheng Li
Meiosis is critical for sexual reproduction and the generation of new allelic variations in most eukaryotes. In this study, we report the isolation of a meiotic gene, DLC1, using a map-based cloning strategy. The dlc1 mutant is sterile in both male and female gametophytes due to an earlier defect in the leptotene chromosome and subsequent abnormalities at later stages. DLC1 is strongly expressed in the pollen mother cells (PMCs) and tapetum and encodes a nucleus-located rice type-B response regulator (RR) with transcriptional activity...
April 20, 2019: Plant Journal
https://read.qxmd.com/read/31004550/the-plant-ptm-viewer-a-central-resource-for-exploring-plant-protein-modifications
#13
Patrick Willems, Alison Horne, Thomas Van Parys, Sofie Goormachtig, Ive De Smet, Alexander Botzki, Frank Van Breusegem, Kris Gevaert
Posttranslational modifications (PTMs) of proteins are central in any kind of cellular signaling. Modern mass spectrometry technologies enable comprehensive identification and quantification of various PTMs. Given the increased numbers and types of mapped protein modifications, a database is necessary that simultaneously integrates and compares site-specific information for different PTMs, especially in plants for which the available PTM data are poorly catalogued. Here, we present the Plant PTM Viewer (http://www...
April 20, 2019: Plant Journal
https://read.qxmd.com/read/31002470/relationship-of-gun1-to-fug1-in-chloroplast-protein-homeostasis
#14
Giada Marino, Belen Naranjo, Jing Wang, Jan-Ferdinand Penzler, Tatjana Kleine, Dario Leister
GUN1 integrates retrograde signals in chloroplasts but the underlying mechanism is elusive. FUG1, a chloroplast translation initiation factor, and GUN1 are co-expressed at the transcriptional level, and FUG1 co-immunoprecipitates with GUN1. We used mutants of GUN1 (gun1-103) and FUG1 (fug1-3) to analyse their functional relationship at the physiological and systems-wide level, the latter including transcriptome and proteome analyses. Absence of GUN1 aggravates the effects of decreased FUG1 levels on chloroplast protein translation, resulting in transiently more pronounced phenotypes regarding photosynthesis, leaf coloration, growth and cold acclimation...
April 19, 2019: Plant Journal
https://read.qxmd.com/read/31002461/the-cystathionine-beta-lyase-is-crucial-for-embryo-patterning-and-the-maintenance-of-root-stem-cell-niche-in-arabidopsis
#15
Guolan Liu, Weiyuan Yang, Xiaojing Zhang, Tao Peng, Yi Zou, Tao Zhang, Hao Wang, Xuncheng Liu, Li-Zhen Tao
The growth and development of roots in plants depends on the specification and maintenance of the root apical meristem. Here, we report the identification of CBL, a gene required for embryo and root development in Arabidopsis, and encodes cystathionine beta-lyase (CBL) that catalyzes the penultimate step in methionine (Met) biosynthesis, which also led to the elucidation of a previous unknown but crucial metabolic contribution by the Met biosynthesis pathway. CBL is expressed in embryos and showing quiescent center (QC)-enriched expression pattern in the root...
April 19, 2019: Plant Journal
https://read.qxmd.com/read/31002459/enzymatic-basis-for-c-lignin-monomer-biosynthesis-in-the-seed-coat-of-cleome-hassleriana
#16
Chunliu Zhuo, Xiaolan Rao, Rajeev Azad, Ravi Pandey, Xirong Xiao, Aaron Harkelroad, Xiaoqiang Wang, Fang Chen, Richard A Dixon
C-lignin is a linear polymer of caffeyl alcohol, found in the seed coats of several exotic plant species, with promising properties for generation of carbon fibers and high value chemicals. In the ornamental plant Cleome hassleriana, guaiacyl (G) lignin is deposited in the seed coat for the first 6-12 days after pollination, after which G lignin deposition ceases and C-lignin accumulates, providing an excellent model system to study C-lignin biosynthesis. We performed RNA sequencing of seed coats harvested at 2-day intervals throughout development...
April 19, 2019: Plant Journal
https://read.qxmd.com/read/31002209/population-genomics-reveals-a-fine-scale-recombination-landscape-for-genetic-improvement-of-cotton
#17
Chao Shen, Nian Wang, Cong Huang, Maojun Wang, Xianlong Zhang, Zhongxu Lin
Recombination breaks up ancestral linkage disequilibrium, creates combinations of alleles, affects the efficiency of natural selection, and plays a major role in crop domestication and improvement. However, there is little knowledge regarding variation in the population-scaled recombination rate in cotton. We constructed recombination maps and characterized the difference in the genomic landscape of the population-scaled recombination rate between Gossypium hirsutum and G. arboreum and sub-genomes based on the 381 sequenced G...
April 19, 2019: Plant Journal
https://read.qxmd.com/read/31001857/membrane-lipid-polyunsaturation-mediated-by-fatty-acid-desaturase-2-fad2-is-involved-in-endoplasmic-reticulum-stress-tolerance-in-arabidopsis-thaliana
#18
Van Cam Nguyen, Yuki Nakamura, Kazue Kanehara
Unsaturation of membrane glycerolipid classes at their hydrophobic fatty acid tails critically affects the physical nature of the lipid molecule. In Arabidopsis thaliana, 7 FATTY ACID DESATURASES (FADs) differently desaturate each glycerolipid class in plastids and the endoplasmic reticulum (ER). Here, we showed that polyunsaturation of ER glycerolipids is required for the ER stress response. Through systematic screening of FAD mutants, we found that a mutant of FAD2 resulted in a hypersensitive response to tunicamycin, a chemical inducer of ER stress...
April 18, 2019: Plant Journal
https://read.qxmd.com/read/30985038/extra-plastidial-degradation-of-chlorophyll-and-photosystem-i-in-tobacco-leaves-involving-senescence-associated-vacuoles
#19
Facundo M Gomez, Cristian A Carrión, María Lorenza Costa, Christine Desel, Thomas Kieselbach, Christiane Funk, Karin Krupinska, Juan J Guiamét
Chlorophyll (Chl) loss is the main visible symptom of senescence in leaves. The initial steps of Chl degradation operate within the chloroplast, but the observation that "senescence-associated vacuoles" (SAVs) contain Chl raises the question whether SAVs might also contribute to Chl breakdown. Previous confocal microscope observations (Martínez et al. 2008) showed many SAVs containing Chl. Isolated SAVs contained Chl a and b (with a Chl a/b ratio close to 5) and smaller amounts of chlorophyllide a...
April 15, 2019: Plant Journal
https://read.qxmd.com/read/30943325/genetic-interactions-reveal-the-antagonistic-roles-of-ft-tsf-and-tfl1-in-the-determination-of-inflorescence-meristem-identity-in-arabidopsis
#20
Chunghee Lee, Soo-Jin Kim, Suhyun Jin, Hendry Susila, Geummin Youn, Zeeshan Nasim, Hemasundar Alavilli, Kyung-Sook Chung, Seong Jeon Yoo, Ji Hoon Ahn
During the transition to the reproductive phase, the shoot apical meristem switches from the developmental program that generates vegetative organs and instead produces flowers. In this study, we examined the genetic interactions of FLOWERING LOCUS T (FT)/TWIN SISTER OF FT (TSF) and TERMINAL FLOWER 1 (TFL1) in the determination of inflorescence meristem identity in Arabidopsis thaliana. The ft-10 tsf-1 mutants produced a compact inflorescence surrounded by serrated leaves (hyper-vegetative shoot) at the early bolting stage, as did plants overexpressing TFL1...
April 3, 2019: Plant Journal
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