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https://www.readbyqxmd.com/read/28097691/oilseed-rape-nac56-transcription-factor-modulates-reactive-oxygen-species-accumulation-and-hypersensitive-response-like-cell-death
#1
Qinqin Chen, Fangfang Niu, Jingli Yan, Bisi Chen, Feifei Wu, Xiaohua Guo, Bo Yang, Yuan-Qing Jiang
The NAC (NAM, ATAF1/2, CUC2) transcription factor gene family is plant-specific and plays diverse roles in development and responses to abiotic stresses and pathogen challenge. Oilseed rape (Brassica napus) or canola is an important oil crop worldwide, however, the function of NAC genes in it remains largely elusive. Here, we identified and characterized the NAC56 gene isolated from oilseed rape. Expression of BnaNAC56 was induced by abscisic acid (ABA), jasmonic acid (JA), methyl viologen (MV) and a necrotrophic fungal pathogen Sclerotinia sclerotiorum, but repressed by cold...
January 18, 2017: Physiologia Plantarum
https://www.readbyqxmd.com/read/28088515/the-membrane-tethered-nac-transcription-factor-atntl7-contributes-to-er-stress-resistance-in-arabidopsis
#2
Yong Hun Chi, Sarah Mae Boyles Melencion, Cresilda Vergara Alinapon, Min Ji Kim, Eun Seon Lee, Seol Ki Paeng, Joung Hun Park, Ganesh M Nawkar, Young Jun Jung, Ho Byeong Chae, Chang Ho Kang, Sang Yeol Lee
We screened for endoplasmic reticulum (ER) stress-resistant mutants among 25 mutants of the Arabidopsis NTL (NAC with Transmembrane motif 1-Like) family. We identified a novel mutant, SALK_044777, showing strong resistance to ER stress. RT-PCR and genomic DNA sequence analyses identified the mutant as atntl7, which harbors a T-DNA insertion in the fourth exon of AtNTL7. Two other atntl7-mutant alleles, in which T-DNA was inserted in the second exon and third intron of AtNTL7, respectively, showed ER-stress sensitive phenotypes, suggesting that SALK_044777 is a gain-of-function mutant...
January 11, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28074873/the-nac-type-transcription-factor-osnac2-regulates-aba-dependent-genes-and-abiotic-stress-tolerance-in-rice
#3
Jiabin Shen, Bo Lv, Liqiong Luo, Jianmei He, Chanjuan Mao, Dandan Xi, Feng Ming
Plants can perceive environmental changes and respond to external stressors. Here, we show that OsNAC2, a member of the NAC transcription factor family, was strongly induced by ABA and osmotic stressors such as drought and high salt. With reduced yields under drought conditions at the flowering stage, OsNAC2 overexpression lines had lower resistance to high salt and drought conditions. RNAi plants showed enhanced tolerance to high salinity and drought stress at both the vegetative and flowering stages. Furthermore, RNAi plants had improved yields after drought stress...
January 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28064119/identification-and-expression-analysis-of-the-nac-transcription-factor-family-in-durum-wheat-triticum-turgidum-l-ssp-durum
#4
Mohammed Najib Saidi, Dhawya Mergby, Faiçal Brini
The NAC (NAM, ATAF and CUC) proteins belong to one of the largest plant-specific transcription factor (TF) families and play important roles in plant development processes, response to biotic and abiotic cues and hormone signaling. Our analysis led to the identification of 168 NAC genes in durum wheat, including nine putative membrane-bound TFs and 48 homeologous genes pairs. Phylogenetic analyses of TtNACs along with their Arabidopsis, grape, barley and rice counterparts divided these proteins into 8 phylogenetic groups and allowed the identification of TtNAC-A7, TtNAC-B35, TtNAC-A68, TtNAC-B69 and TtNAC-A43 as homologs of OsNAC1, OsNAC8, OsNTL2, OsNTL5 and ANAC025/NTL14, respectively...
January 2, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28061815/overexpression-of-panac03-a-stress-induced-nac-gene-family-transcription-factor-in-norway-spruce-leads-to-reduced-flavonol-biosynthesis-and-aberrant-embryo-development
#5
Kerstin Dalman, Julia Johanna Wind, Miguel Nemesio-Gorriz, Almuth Hammerbacher, Karl Lundén, Ines Ezcurra, Malin Elfstrand
BACKGROUND: The NAC family of transcription factors is one of the largest gene families of transcription factors in plants and the conifer NAC gene family is at least as large, or possibly larger, as in Arabidopsis. These transcription factors control both developmental and stress induced processes in plants. Yet, conifer NACs controlling stress induced processes has received relatively little attention. This study investigates NAC family transcription factors involved in the responses to the pathogen Heterobasidion annosum (Fr...
January 6, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28039561/functional-characterization-of-tomato-membrane-bound-nac-transcription-factors
#6
Payel Bhattacharjee, Rohit Das, Arunava Mandal, Pallob Kundu
Genome-wide analysis was carried out to identify and analyze differential expression pattern of tomato membrane bound NAC transcription factors (SlNACMTFs) during stresses. Two biotic-stress-related SlNACMTFs have been characterized to elucidate their regulatory function. NAC transcription factors are known regulators of stress-related gene expression. As Stresses are perceived and transmitted by membrane-bound proteins, functional characterization of membrane-associated NAC transcription factors in tomato can reveal valuable insight about membrane-mediated stress-signalling...
December 30, 2016: Plant Molecular Biology
https://www.readbyqxmd.com/read/28032643/an-arabidopsis-nac-transcription-factor-nac4-promotes-pathogen-induced-cell-death-under-negative-regulation-by-microrna164
#7
Myoung-Hoon Lee, Hwi Seong Jeon, Hye Gi Kim, Ohkmae K Park
Hypersensitive response (HR) is a form of programmed cell death (PCD) and the primary immune response that prevents pathogen invasion in plants. Here, we show that a microRNAmiR164 and its target gene NAC4 (At5g07680), encoding a NAC transcription factor, play essential roles in the regulation of HR PCD in Arabidopsis thaliana. Cell death symptoms were noticeably enhanced in NAC4-overexpressing (35S:NAC4) and mir164 mutant plants in response to avirulent bacterial pathogens. NAC4 expression was induced by pathogen infection and negatively regulated by miR164 expression...
December 29, 2016: New Phytologist
https://www.readbyqxmd.com/read/28013230/evolution-of-plant-conducting-cells-perspectives-from-key-regulators-of-vascular-cell-differentiation
#8
REVIEW
Misato Ohtani, Nobuhiro Akiyoshi, Yuto Takenaka, Ryosuke Sano, Taku Demura
One crucial problem that plants faced during their evolution, particularly during the transition to growth on land, was how to transport water, nutrients, metabolites, and small signaling molecules within a large, multicellular body. As a solution to this problem, land plants developed specific tissues for conducting molecules, called water-conducting cells (WCCs) and food-conducting cells (FCCs). The well-developed WCCs and FCCs in extant plants are the tracheary elements and sieve elements, respectively, which are found in vascular plants...
January 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28008334/transcriptome-analysis-highlights-defense-and-signaling-pathways-mediated-by-rice-pi21-gene-with-partial-resistance-to-magnaporthe-oryzae
#9
Yu Zhang, Jianhua Zhao, Yali Li, Zhengjie Yuan, Haiyan He, Haihe Yang, Haiyan Qu, Chenyan Ma, Shaohong Qu
Rice blast disease is one of the most destructive rice diseases worldwide. The pi21 gene confers partial and durable resistance to Magnaporthe oryzae. However, little is known regarding the molecular mechanisms of resistance mediated by the loss-of-function of Pi21. In this study, comparative transcriptome profiling of the Pi21-RNAi transgenic rice line and Nipponbare with M. oryzae infection at different time points (0, 12, 24, 48, and 72 hpi) were investigated using RNA sequencing. The results generated 43,222 unique genes mapped to the rice genome...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27994057/foxo3-is-essential-for-protecting-hematopoietic-stem-and-progenitor-cells-from-oxidative-dna-damage
#10
Carolina L Bigarella, Jianfeng Li, Pauline Rimmelé, Raymond Liang, Robert W Sobol, Saghi Ghaffari
Accumulation of damaged DNA in hematopoietic stem cells (HSC) is associated with chromosomal abnormalities, genomic instability and HSC aging, and might promote hematological malignancies with age. Despite this importance, the regulatory pathways implicated in the HSC DNA damage response have not been fully elucidated. One of the sources of DNA damage is reactive oxygen species (ROS) generated by both exogenous and endogenous insults. Balancing ROS levels in HSC requires FOXO3, which is an essential transcription factor for HSC maintenance implicated in HSC aging...
December 19, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27986993/characterization-of-a-vacuolar-h-atpase-g-subunit-gene-from-juglans-regia-jrvhag1-involved-in-mannitol-induced-osmotic-stress-tolerance
#11
Zhenggang Xu, Yunlin Zhao, Yu Ge, Jiao Peng, Meng Dong, Guiyan Yang
JrVHAG1 is an important candidate gene for plant osmotic tolerance regulation. Vacuolar H(+)-ATPase (V-ATPase) is important for plant responses to abiotic stress; the G subunit is a vital part of V-ATPase. In this study, a G subunit of V-ATPase was cloned from Juglans regia (JrVHAG1) and functionally characterized. JrVHAG1 transcription was induced by mannitol that increasing 17.88-fold in the root at 12 h and 19.16-fold in the leaf at 96 h compared to that under control conditions. JrVHAG1 was overexpressed in Arabidopsis and three lines (G2, G6, and G9) with highest expression levels were selected for analysis...
December 16, 2016: Plant Cell Reports
https://www.readbyqxmd.com/read/27975189/arabidopsis-anac069-binds-to-c-a-g-cg-t-g-sequences-to-negatively-regulate-salt-and-osmotic-stress-tolerance
#12
Lin He, Xinxin Shi, Yanmin Wang, Yong Guo, Kejun Yang, Yucheng Wang
ANAC069 binds to the DNA sequence of C[A/G]CG[T/G] to regulate the expression of genes, resulting in decreased ROS scavenging capability and proline biosynthesis, which contribute to increased sensitivity to salt and osmotic stress. NAM-ATAF1/2 and CUC2 (NAC) proteins are plant-specific transcription factors that play important roles in abiotic stress responses. In the present study, we characterized the physiological and regulatory roles of Arabidopsis thaliana ANAC069 in response to abiotic stresses. Arabidopsis plants overexpressing ANAC069 displayed increased sensitivity to abscisic acid, salt, and osmotic stress...
December 14, 2016: Plant Molecular Biology
https://www.readbyqxmd.com/read/27929436/comparison-of-small-rna-profiles-of-glycine-max-and-glycine-soja-at-early-developmental-stages
#13
Yuzhe Sun, Zeta Mui, Xuan Liu, Aldrin Kay-Yuen Yim, Hao Qin, Fuk-Ling Wong, Ting-Fung Chan, Siu-Ming Yiu, Hon-Ming Lam, Boon Leong Lim
Small RNAs, including microRNAs (miRNAs) and phased small interfering RNAs (phasiRNAs; from PHAS loci), play key roles in plant development. Cultivated soybean, Glycine max, contributes a great deal to food production, but, compared to its wild kin, Glycine soja, it may lose some genetic information during domestication. In this work, we analyzed the sRNA profiles of different tissues in both cultivated (C08) and wild soybeans (W05) at three stages of development. A total of 443 known miRNAs and 15 novel miRNAs showed varying abundances between different samples, but the miRNA profiles were generally similar in both accessions...
December 6, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27924117/transcriptome-differences-between-fiber-type-and-seed-type-cannabis-sativa-variety-exposed-to-salinity
#14
Jiajia Liu, Qin Qiao, Xia Cheng, Guanghui Du, Gang Deng, Mingzhi Zhao, Feihu Liu
The industrial hemp varieties 'Yunma 5' and 'Bamahuoma,' which demonstrate growth vigor and environmental adaptability, have been primarily cultivated in Yunnan and Guangxi, China, respectively, for fiber and seeds. The results of physiological measurements showed the phenotypic differences between the two varieties in response to salt stress. RNA-Seq analysis was first performed on leaves of both varieties sampled at four time intervals (0, 2, 4, 6 days) after treatment with salt (500 mM NaCl) We identified 220 co-up-regulated differentially expressed genes (DEGs) in the two varieties, while 26 up-regulated DEGs and 24 down-regulated DEGs were identified exclusively in the single varieties after 2 days of salt stress...
October 2016: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
https://www.readbyqxmd.com/read/27900814/effects-of-intratracheal-exposure-of-2-chloroethyl-ethyl-sulfide-cees-on-the-activation-of-ccaat-enhancer-binding-protein-c-ebp-and-its-protection-by-antioxidant-liposome
#15
Somdutta Sinha Roy, Shyamali Mukherjee, Salil K Das
Exposure of 2-chloroethyl ethyl sulfide (CEES) to guinea pigs causes lung injury by infiltration of neutrophils in interstitial lung spaces. A unique MAPK-regulated transcription factor, C/EBP (CCAAT-enhancer-binding protein), regulates the expression of intracellular adhesion molecule-1 (ICAM-1), involved in recruiting neutrophils in lung. The present study was to determine if CEES exposure causes activation of C/EBP, in particular the predominant β-isoform and if so whether it can be prevented by intratracheal delivery of an antioxidant liposome containing N-acetyl cysteine and tocopherols...
November 30, 2016: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/27872632/three-rice-nac-transcription-factors-heteromerize-and-are-associated-with-seed-size
#16
Iny Elizebeth Mathew, Sweta Das, Arunima Mahto, Pinky Agarwal
NACs are plant-specific transcription factors (TFs) involved in multiple aspects of development and stress. In rice, three NAC TF encoding genes, namely ONAC020, ONAC026, and ONAC023 express specifically during seed development, at extremely high levels. They exhibit significantly strong association with seed size/weight with the sequence variations located in the upstream regulatory region. Concomitantly, their expression pattern/levels during seed development vary amongst different accessions with variation in seed size...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27861553/activity-based-anorexia-alters-the-expression-of-bdnf-transcripts-in-the-mesocorticolimbic-reward-circuit
#17
Emily V Ho, Stephanie J Klenotich, Matthew S McMurray, Stephanie C Dulawa
Anorexia nervosa (AN) is a complex eating disorder with severe dysregulation of appetitive behavior. The activity-based anorexia (ABA) paradigm is an animal model in which rodents exposed to both running wheels and scheduled feeding develop aspects of AN including paradoxical hypophagia, dramatic weight loss, and hyperactivity, while animals exposed to only one condition maintain normal body weight. Brain-derived neurotrophic factor (BDNF), an activity-dependent modulator of neuronal plasticity, is reduced in the serum of AN patients, and is a known regulator of feeding and weight maintenance...
2016: PloS One
https://www.readbyqxmd.com/read/27860167/both-jrwrky2-and-jrwrky7-of-juglans-regia-mediate-responses-to-abiotic-stresses-and-abscisic-acid-through-formation-of-homodimers-and-interaction
#18
G Yang, W Zhang, Z Liu, A-Y Yi-Maer, M Zhai, Z Xu
WRKY transcription factors belong to a large protein family that is involved in diverse developmental processes and abiotic stress responses. Currently, there is little understanding of the role of WRKY transcription factors in regulatory mechanisms in plants, especially in the protein-protein interactions that are essential for biological regulatory functions and networks. In the present study, yeast one-hybrid, yeast two-hybrid, transient expression and quantitative RT-PCR were applied to investigate the potential characteristics of two WRKY proteins from Juglans regia, JrWRKY2 (GenBank Accession No...
November 11, 2016: Plant Biology
https://www.readbyqxmd.com/read/27855193/transcriptome-wide-identification-and-expression-analysis-of-the-nac-gene-family-in-tea-plant-camellia-sinensis-l-o-kuntze
#19
Yong-Xin Wang, Zhi-Wei Liu, Zhi-Jun Wu, Hui Li, Jing Zhuang
In plants, the NAC (NAM-ATAF1/2-CUC) family of proteins constitutes several transcription factors and plays vital roles in diverse biological processes, such as growth, development, and adaption to adverse factors. Tea, as a non-alcoholic drink, is known for its bioactive ingredients and health efficacy. Currently, knowledge about NAC gene family in tea plant remains very limited. In this study, a total of 45 CsNAC genes encoding NAC proteins including three membrane-bound members were identified in tea plant through transcriptome analysis...
2016: PloS One
https://www.readbyqxmd.com/read/27833618/depletion-of-key-meiotic-genes-and-transcriptome-wide-abiotic-stress-reprogramming-mark-early-preparatory-events-ahead-of-apomeiotic-transition
#20
Jubin N Shah, Olga Kirioukhova, Pallavi Pawar, Muhammad Tayyab, Juan L Mateo, Amal J Johnston
Molecular dissection of apomixis - an asexual reproductive mode - is anticipated to solve the enigma of loss of meiotic sex, and to help fixing elite agronomic traits. The Brassicaceae genus Boechera comprises of both sexual and apomictic species, permitting comparative analyses of meiotic circumvention (apomeiosis) and parthenogenesis. Whereas previous studies reported local transcriptome changes during these events, it remained unclear whether global changes associated with hybridization, polyploidy and environmental adaptation that arose during evolution of Boechera might serve as (epi)genetic regulators of early development prior apomictic initiation...
2016: Frontiers in Plant Science
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