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plant organogenesis

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https://www.readbyqxmd.com/read/28437159/specific-host-responsive-associations-between-medicago-truncatula-accessions-and-sinorhizobium-strains
#1
Théophile Kazmierczak, Marianna Nagymihály, Florian Lamouche, Quentin Barrière, Ibtissem Guefrachi, Benoit Alunni, Mouna Ouadghiri, Jamal Ibijbijen, Éva Kondorosi, Peter Mergaert, Véronique Gruber
Legume plants interact with rhizobia to form nitrogen-fixing root nodules. Legume-rhizobium interactions are specific and only compatible rhizobia and plant species will lead to nodule formation. Even within compatible interactions, the genotype of both the plant and the bacterial symbiont will impact on the efficiency of nodule functioning and nitrogen-fixation activity. The model legume Medicago truncatula forms nodules with several species of the Sinorhizobium genus. However, the efficiency of these bacterial strains is highly variable...
April 24, 2017: Molecular Plant-microbe Interactions: MPMI
https://www.readbyqxmd.com/read/28432294/genome-wide-identification-characterization-of-the-mads-box-gene-family-in-chinese-jujube-and-their-involvement-in-flower-development
#2
Liman Zhang, Jin Zhao, Chunfang Feng, Mengjun Liu, Jiurui Wang, Yafei Hu
MADS-box genes encode transcription factors that are involved in plant development control (particularly in floral organogenesis) and signal transduction pathways, though a comprehensive analysis of MADS-box family proteins in Chinese jujube (Ziziphus jujuba Mill.) is still missing. Here, we report a genome-wide analysis of the MADS-box gene family in Chinese jujube. Based on phylogenetic analyses, 52 jujube MADS-box genes were classified into 25 MIKC(C)-type, 3 MIKC(*)-type, 16 Mα, 5 Mβ and 3 Mγ genes. 37 genes were randomly distributed across all 12 putative chromosomes...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28407097/mircat2-accurate-prediction-of-plant-and-animal-micrornas-from-next-generation-sequencing-datasets
#3
Claudia Paicu, Irina Mohorianu, Matthew Stocks, Ping Xu, Aurore Coince, Martina Billmeier, Tamas Dalmay, Vincent Moulton, Simon Moxon
Motivation: MicroRNAs are a class of _21-22 nucleotide small RNAs which are excised from a stable hairpin-like secondary structure. They have important gene regulatory functions and are involved in many pathways including developmental timing, organogenesis and development in eukaryotes. There are several computational tools for miRNA detection from next-generation sequencing (NGS) datasets. However, many of these tools suffer from high false positive and false negative rates. Here we present a novel miRNA prediction algorithm, miRCat2...
April 12, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28403182/functional-analysis-of-the-gmesr1-gene-associated-with-soybean-regeneration
#4
Chao Zhang, Xiaodong Wu, Binbin Zhang, Qingshan Chen, Ming Liu, Dawei Xin, Zhaoming Qi, Sinan Li, Yanlong Ma, Lingshuang Wang, Yangmei Jin, Wenbin Li, Xiaoxia Wu, An-Yu Su
Plant regeneration can occur via in vitro tissue culture through somatic embryogenesis or de novo shoot organogenesis. Transformation of soybean (Glycine max) is difficult, hence optimization of the transformation system for soybean regeneration is required. This study investigated ENHANCER OF SHOOT REGENERATION 1 (GmESR1), a soybean transcription factor that targets regeneration-associated genes. Sequence analysis showed that GmESR1 contained a conserved 57 amino acid APETALA 2 (AP2)/ETHYLENE RESPONSE FACTOR (ERF) DNA-binding domain...
2017: PloS One
https://www.readbyqxmd.com/read/28396676/a-conserved-potential-development-framework-applies-to-shoots-of-legume-species-with-contrasting-morphogenetic-strategies
#5
Lucas Faverjon, Abraham J Escobar-Gutiérrez, Isabelle Litrico, Gaëtan Louarn
A great variety of legume species are used for forage production and grown in multi-species grasslands. Despite their close phylogenetic relationship, they display a broad range of morphologies that markedly affect their competitive abilities and persistence in mixtures. Little is yet known about the component traits that control the deployment of plant architecture in most of these species. During the present study, we compared the patterns of shoot organogenesis and shoot organ growth in contrasting forage species belonging to the four morphogenetic groups previously identified in herbaceous legumes (i...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28391480/plant-regeneration-from-cell-suspension-culture-in-saccharum-officinarum-l-and-ascertaining-of-genetic-fidelity-through-rapd-and-issr-markers
#6
Avinash S Thorat, Nishant A Sonone, Vrushali V Choudhari, Rachayya M Devarumath, K Harinath Babu
The aim of this study was to produce sugarcane plantlets from cell suspension culture and study its genetic fidelity using molecular markers. The study was carried out using sugarcane varieties Co 86032 and Q117. Callus cultures of both the varieties were optimized using six different callus induction media. After screening the growth response of callus on six different callus induction media, it was observed that medium no. VI supplemented with 500 mg l(-1) of each PVP, Casein hydrolysate and MES buffer showed high amounts of callus in Co 86032 (79...
May 2017: 3 Biotech
https://www.readbyqxmd.com/read/28363992/mtlax2-a-functional-homologue-of-the-auxin-importer-ataux1-is-required-for-nodule-organogenesis
#7
Sonali Roy, Fran C Robson, Jodi Lorraine Stewart Lilley, Chengwu Liu, Xiaofei Cheng, Jiangqi Wen, Caitlin Bone, Simon Walker, Jongho Sun, Donna Cousins, Malcolm J Bennett, J Allan Downie, Ranjan Swarup, Giles E Oldroyd, Jeremy D Murray
The plant hormone auxin is a critical signal during root growth and development. A role for auxin in the formation of nodules, specialized lateral organs that form on roots and house nitrogen-fixing rhizobia, has been suggested by numerous studies. We report that auxin influx inhibitors 1-naphthoxyacetic acid (1-NOA) and 2-NOA reduced nodulation of Medicago truncatula, suggesting potential involvement of the AUX/LAX family of auxin influx transporters in nodulation. Gene expression studies identified MtLAX2, an ortholog of Arabidopsis AUX1, as being induced at early stages of nodule development...
March 31, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28273182/protocol-for-efficient-regulation-of-in-vitro-morphogenesis-in-einkorn-triticum-monococcum-l-a-recalcitrant-diploid-wheat-species
#8
Dmitry Miroshnichenko, Inna Chaban, Mariya Chernobrovkina, Sergey Dolgov
Einkorn (Triticum monococcum L.) is A-genome diploid wheat that has a potential to become a useful model for understanding the biology and genomics in Triticeae. Unfortunately, the application of modern technologies such as genetic engineering, RNAi-based gene silencing and genome editing is not available for einkorn as there is no efficient in vitro tissue culture and plant regeneration system. In the present study an efficient and simple protocol for plant regeneration via direct or indirect somatic embryogenesis and organogenesis has been developed...
2017: PloS One
https://www.readbyqxmd.com/read/28272988/chlorophyllide-a-oxygenase-cao-deficiency-affects-the-levels-of-singlet-oxygen-and-formation-of-plasmodesmata-in-leaves-and-shoot-apical-meristems-of-barley
#9
Valeria A Dmitrieva, Alexandra N Ivanova, Elena V Tyutereva, Anastasiia I Evkaikina, Ekaterina A Klimova, Olga V Voitsekhovskaja
In plants, organogenesis and specification of cell layers and tissues rely on precise symplastic delivery of regulatory molecules via plasmodesmata. Accordingly, abundance and aperture of plasmodesmata at individual cell boundaries should be controlled by the plant. Recently, studies in Arabidopsis established reactive oxygen species as major regulators of plasmodesmata formation and gating. We show that in a barley mutant deficient in the synthesis of chlorophyll b, the numbers of plasmodesmata in leaves and in the shoot apical meristem are significantly higher than in the corresponding wild type, probably due to redox imbalance in the mutant...
March 8, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28263025/poly-adp-ribose-polymerases-regulate-cell-division-and-development-in-arabidopsis-roots
#10
Caifeng Liu, Qiao Wu, Weiwei Liu, Zongyin Gu, Wenjing Wang, Ping Xu, Hong Ma, Xiaochun Ge
Root organogenesis involves cell division, differentiation and expansion. The molecular mechanisms regulating root development are not fully understood. In this study, we identified poly (ADP-ribose) polymerases (PARPs) as new players in root development. PARP catalyzes poly (ADP-ribosyl)ation of proteins by repeatedly adding ADP-ribose units onto proteins using nicotinamide adenine dinucleotide (NAD(+) ) as the donor. We found that inhibition of PARP activities by 3-aminobenzomide (3-AB) increased the growth rates of both primary and lateral roots, leading to a more developed root system...
March 6, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/28254480/effects-of-dichloromethane-and-butanol-fractions-of-gochnatia-polymorpha-subsp-floccosum-in-maternal-reproductive-outcome-embryo-fetal-development-and-dna-integrity-in-mice
#11
Lucas Roberto Pessatto, Sarah Alves Auharek, Caroline Amélia Gonçalves, Natan de David, Antônio Carlos Duenhas Monreal, Cândida Aparecida Leite Kassuya, AndreiaAndréia Conceição Milan Brochado Antoniolli-Silva, Maria Élida Alves Stefanello, Rodrigo Juliano Oliveira
ETHNOPHARMACOLOGICAL RELEVANCE: Gochnatia polymorpha ssp. floccosa (Asteraceae) also known as ''Cambará'' is used as medicinal plant in Brazil to treat infections and inflammation. Previous studies showed that its ethanolic extract could be bioprospecting of a new anti-inflammatory phytotherapy for use during pregnancy. This work aimed to evaluate dichloromethane (DCM) and butanolic (BT) fractions from G. polymorpha on embryo-fetal development and DNA integrity in mice. MATERIALS AND METHODS: Female mice were treated with 50 and 20mg/kg of the DCM and BT fractions, respectively, during organogenesis and gestational period...
February 27, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28246118/gtpase-rop2-binds-and-promotes-activation-of-target-of-rapamycin-tor-in-response-to-auxin
#12
Mikhail Schepetilnikov, Joelle Makarian, Ola Srour, Angèle Geldreich, Zhenbiao Yang, Johana Chicher, Philippe Hammann, Lyubov A Ryabova
Target of rapamycin (TOR) promotes reinitiation at upstream ORFs (uORFs) in genes that play important roles in stem cell regulation and organogenesis in plants. Here, we report that the small GTPase ROP2, if activated by the phytohormone auxin, promotes activation of TOR, and thus translation reinitiation of uORF-containing mRNAs. Plants with high levels of active ROP2, including those expressing constitutively active ROP2 (CA-ROP2), contain high levels of active TOR ROP2 physically interacts with and, when GTP-bound, activates TOR in vitro TOR activation in response to auxin is abolished in ROP-deficient rop2 rop6 ROP4 RNAi plants...
April 3, 2017: EMBO Journal
https://www.readbyqxmd.com/read/28223441/rima-dependent-nuclear-accumulation-of-iyo-triggers-auxin-irreversible-cell-differentiation-in-arabidopsis
#13
Alfonso Muñoz, Silvina Mangano, Mary Paz González-García, Ramón Contreras, Michael Sauer, Bert De Rybel, Dolf Weijers, José Juan Sánchez-Serrano, Maite Sanmartín, Enrique Rojo
The transcriptional regulator MINIYO (IYO) is essential and rate-limiting for initiating cell differentiation in Arabidopsis thaliana Moreover, IYO moves from the cytosol into the nucleus in cells at the meristem periphery, possibly triggering their differentiation. However, the genetic mechanisms controlling IYO nuclear accumulation were unknown, and the evidence that increased nuclear IYO levels trigger differentiation remained correlative. Searching for IYO interactors, we identified RPAP2 IYO Mate (RIMA), a homolog of yeast and human proteins linked to nuclear import of selective cargo...
March 2017: Plant Cell
https://www.readbyqxmd.com/read/28138058/basic-pentacysteine-proteins-repress-abscisic-acid-insensitive4-expression-via-direct-recruitment-of-the-polycomb-repressive-complex-2-in-arabidopsis-root-development
#14
Ying Mu, Meijuan Zou, Xuwu Sun, Baoye He, Xiumei Xu, Yini Liu, Lixin Zhang, Wei Chi
Plant transcription factors generally act in complex regulatory networks that function at multiple levels to govern plant developmental programs. Dissection of the interconnections among different classes of transcription factors can elucidate these regulatory networks and thus improve our understanding of plant development. Here, we investigated the molecular and functional relationships of the transcription factors ABSCISIC ACID INSENSITIVE 4 (ABI4) and members of the BASIC PENTACYSTEINE (BPC) family in lateral root (LR) development of Arabidopsis thaliana Genetic analysis showed that BPCs promote LR development by repressing ABI4 expression...
January 30, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28111153/plant-stress-tolerance-requires-auxin-sensitive-aux-iaa-transcriptional-repressors
#15
Eilon Shani, Mohammad Salehin, Yuqin Zhang, Sabrina E Sanchez, Colleen Doherty, Renhou Wang, Cristina Castillejo Mangado, Liang Song, Iris Tal, Odelia Pisanty, Joseph R Ecker, Steve A Kay, Jose Pruneda-Paz, Mark Estelle
The Aux/IAA proteins are auxin-sensitive repressors that mediate diverse physiological and developmental processes in plants [1, 2]. There are 29 Aux/IAA genes in Arabidopsis that exhibit unique but partially overlapping patterns of expression [3]. Although some studies have suggested that individual Aux/IAA genes have specialized function, genetic analyses of the family have been limited by the scarcity of loss-of-function phenotypes [4]. Furthermore, with a few exceptions, our knowledge of the factors that regulate Aux/IAA expression is limited [1, 5]...
February 6, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28086797/sep-class-genes-in-prunus-mume-and-their-likely-role-in-floral-organ-development
#16
Yuzhen Zhou, Zongda Xu, Xue Yong, Sagheer Ahmad, Weiru Yang, Tangren Cheng, Jia Wang, Qixiang Zhang
BACKGROUND: Flower phylogenetics and genetically controlled development have been revolutionised during the last two decades. However, some of these evolutionary aspects are still debatable. MADS-box genes are known to play essential role in specifying the floral organogenesis and differentiation in numerous model plants like Petunia hybrida, Arabidopsis thaliana and Antirrhinum majus. SEPALLATA (SEP) genes, belonging to the MADS-box gene family, are members of the ABCDE and quartet models of floral organ development and play a vital role in flower development...
January 13, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28028038/function-and-evolution-of-a-lotus-japonicus-ap2-erf-family-transcription-factor-that-is-required-for-development-of-infection-threads
#17
Koji Yano, Seishiro Aoki, Meng Liu, Yosuke Umehara, Norio Suganuma, Wataru Iwasaki, Shusei Sato, Takashi Soyano, Hiroshi Kouchi, Masayoshi Kawaguchi
Legume-rhizobium symbiosis is achieved by two major events evolutionarily acquired: root hair infection and organogenesis. Infection thread (IT) development is a distinct element for rhizobial infection. Through ITs, rhizobia are efficiently transported from infection foci on root hairs to dividing meristematic cortical cells. To unveil this process, we performed genetic screening using Lotus japonicus MG-20 and isolated symbiotic mutant lines affecting nodulation, root hair morphology, and IT development. Map-based cloning identified an AP2/ERF transcription factor gene orthologous to Medicago truncatula ERN1 LjERN1 was activated in response to rhizobial infection and depended on CYCLOPS and NSP2...
December 27, 2016: DNA Research: An International Journal for Rapid Publication of Reports on Genes and Genomes
https://www.readbyqxmd.com/read/27883217/nitric-oxide-is-involved-in-methane-induced-adventitious-root-formation-in-cucumber
#18
Fang Qi, Zhixin Xiang, Ninghai Kou, Weiti Cui, Daokun Xu, Ren Wang, Dan Zhu, Wenbiao Shen
Our previous studies revealed that methane (CH4 ) induces adventitious rooting in cucumber. However, the corresponding molecular mechanism is still elusive. In this work, we discovered that CH4 triggered the accumulation of nitric oxide (NO) and thereafter cucumber adventitious rooting, mimicking the inducing effects of sodium nitroprusside (SNP) and NONOate (two NO-releasing compounds). Above mentioned responses were sensitive to NO scavenger(s), showing that the accumulation of NO and adventitious root development were respectively impaired...
March 2017: Physiologia Plantarum
https://www.readbyqxmd.com/read/27878992/fusca3-interacting-with-leafy-cotyledon2-controls-lateral-root-formation-through-regulating-yucca4-gene-expression-in-arabidopsis-thaliana
#19
Li Ping Tang, Chao Zhou, Shan Shan Wang, Jia Yuan, Xian Sheng Zhang, Ying Hua Su
Lateral root (LR) development is a post-embryonic organogenesis event that gives rise to most of the underground parts of higher plants. Auxin promotes LR formation, but the molecular mechanisms involved in this process are still not well understood. We analyzed LR formation induced by FUSCA3 (FUS3), a B3 domain transcription factor, which may function by promoting auxin biosynthesis during this process. We identified FUS3-interacting proteins that function in LR formation. In addition, we searched for the common targets of both FUS3 and its interacting protein...
November 23, 2016: New Phytologist
https://www.readbyqxmd.com/read/27872633/a-factor-linking-floral-organ-identity-and-growth-revealed-by-characterization-of-the-tomato-mutant-unfinished-flower-development-ufd
#20
Sandra Poyatos-Pertíñez, Muriel Quinet, Ana Ortíz-Atienza, Fernando J Yuste-Lisbona, Clara Pons, Estela Giménez, Trinidad Angosto, Antonio Granell, Juan Capel, Rafael Lozano
Floral organogenesis requires coordinated interactions between genes specifying floral organ identity and those regulating growth and size of developing floral organs. With the aim to isolate regulatory genes linking both developmental processes (i.e., floral organ identity and growth) in the tomato model species, a novel mutant altered in the formation of floral organs was further characterized. Under normal growth conditions, floral organ primordia of mutant plants were correctly initiated, however, they were unable to complete their development impeding the formation of mature and fertile flowers...
2016: Frontiers in Plant Science
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