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https://www.readbyqxmd.com/read/29471058/itraq-based-quantitative-proteomic-analysis-reveals-pathways-associated-with-re-establishing-desiccation-tolerance-in-germinating-seeds-of-caragana-korshinskii-kom
#1
Long Peng, Qi Sun, Hua Xue, Xiaofeng Wang
Mature seeds of Caragana korshinskii Kom. lose desiccation tolerance (DT) during germination. However, DT can be re-induced by polyethylene glycol (PEG) or abscisic acid (ABA), and this provides a novel system to analyse the mechanism of DT. Although the global gene expression during the re-establishment of DT treated by PEG or ABA has been characterized, the changes in protein species abundance are still unknown. Here, we used an iTRAQ-based quantitative proteomics approach to perform a comparative analysis of protein abundances in germinated seeds of PEG-treated, ABA-treated and untreated radicles in response to the re-establishment of DT...
February 19, 2018: Journal of Proteomics
https://www.readbyqxmd.com/read/29469230/quantitative-3d-imaging-of-cell-level-auxin-and-cytokinin-response-ratios-in-soybean-roots-and-nodules
#2
Jon Fisher, Paul Gaillard, Carl R Fellbaum, Senthil Subramanian, Steve Smith
Legume-Rhizobium symbiosis results in root nodules where rhizobia fix atmospheric nitrogen into plant usable forms in exchange for plant-derived carbohydrates. The development of these specialized root organs involves a set of carefully orchestrated plant hormone signaling. In particular, a spatio-temporal balance between auxin and cytokinin appears to be crucial for proper nodule development. We put together a construct that carried nuclear localized fluorescence sensors for auxin and cytokinin, and used two photon induced fluorescence microscopy for concurrent quantitative 3-dimensional imaging to determine cellular level auxin and cytokinin outputs and ratios in root and nodule tissues of soybean...
February 22, 2018: Plant, Cell & Environment
https://www.readbyqxmd.com/read/29469227/auxin-signalling-of-arachis-hypogaea-activated-by-colonization-of-mutualistic-fungus-phomopsis-liquidambari-enhances-nodulation-and-n-2-fixation
#3
Wei Zhang, Kai Sun, Run-Han Shi, Jie Yuan, Xiao-Jun Wang, Chuan-Chao Dai
Beneficial fungal and rhizobial symbioses share commonalities in phytohormones responses, especially in auxin signalling. Mutualistic fungus Phomopsis liquidambari effectively increases symbiotic efficiency of legume peanut (Arachis hypogaea L.) with another microsymbiont, bradyrhizobium, but the underlying mechanisms are not well understood. We quantified and manipulated the IAA accumulation in ternary P. liquidambari-peanut-bradyrhizobial interactions to uncover its role between distinct symbioses. We found that auxin signalling is both locally and systemically induced by the colonization of P...
February 22, 2018: Plant, Cell & Environment
https://www.readbyqxmd.com/read/29467786/auxin-and-gibberellins-are-required-for-the-receptor-like-kinase-erecta-regulated-hypocotyl-elongation-in-shade-avoidance-in-arabidopsis
#4
Junbo Du, Hengke Jiang, Xin Sun, Yan Li, Yi Liu, Mengyuan Sun, Zhou Fan, Qiulin Cao, Lingyang Feng, Jing Shang, Kai Shu, Jiang Liu, Feng Yang, Weiguo Liu, Taiwen Yong, Xiaochun Wang, Shu Yuan, Liang Yu, Chunyan Liu, Wenyu Yang
Plants use shade avoidance strategy to escape the canopy shade when grown under natural conditions. Previous studies showed that the Arabidopsis receptor-like kinase ERECTA (ER) is involved in shade avoidance syndrome. However, the mechanisms of ER in modulating SAR by promoting hypocotyl elongation are unknown yet. Here, we report that ER regulated hypocotyl elongation in shade avoidance requires auxin and gibberellins (GAs). The T-DNA insertional ER mutant er-3 shows a less hypocotyl length than that in Col-0 wild type...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29464725/gibberellin-antagonizes-jasmonate-induced-defense-against-meloidogyne-graminicola-in-rice
#5
Henok Zemene Yimer, Kamrun Nahar, Tina Kyndt, Ashley Haeck, Lieven Van Meulebroek, Lynn Vanhaecke, Kristof Demeestere, Monica Höfte, Godelieve Gheysen
Gibberellin (GA) regulates various plant growth and developmental processes, but its role in pathogen attack, and especially nematode-plant interactions, still remains to be elucidated. An in-depth characterization of the role of GA in nematode infection was conducted using mutant lines of rice, chemical inhibitors, and phytohormone measurements. Our results showed that GA influences rice-Meloidogyne graminicola interactions in a concentration-dependent manner. Foliar spray of plants with a low concentration of gibberellic acid enhanced nematode infection...
February 21, 2018: New Phytologist
https://www.readbyqxmd.com/read/29463731/gibberellin-della-signaling-targets-the-retromer-complex-to-redirect-protein-trafficking-to-the-plasma-membrane
#6
Yuliya Salanenka, Inge Verstraeten, Christian Löfke, Kaori Tabata, Satoshi Naramoto, Matouš Glanc, Jiří Friml
The plant hormone gibberellic acid (GA) is a crucial regulator of growth and development. The main paradigm of GA signaling puts forward transcriptional regulation via the degradation of DELLA transcriptional repressors. GA has also been shown to regulate tropic responses by modulation of the plasma membrane incidence of PIN auxin transporters by an unclear mechanism. Here we uncovered the cellular and molecular mechanisms by which GA redirects protein trafficking and thus regulates cell surface functionality...
February 20, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29462792/-arabidopsis-thaliana-gh3-15-acyl-acid-amido-synthetase-has-a-highly-specific-substrate-preference-for-the-auxin-precursor-indole-3-butyric-acid
#7
Ashley M Sherp, Corey S Westfall, Sophie Alvarez, Joseph M Jez
Various phytohormones control plant growth and development and mediate biotic and abiotic stress responses. Gretchen Hagen 3 (GH3) acyl acid amido synthetases are plant enzymes that typically conjugate amino acids to indole-3-acetic acid (IAA) or jasmonic acid (JA) to inactivate or activate these phytohormones, respectively; however, the physiological and biological roles of many of these enzymes remain unclear. Using a biochemical approach, we found that the Arabidopsis thaliana GH3.15 (AtGH3.15) preferentially uses the acyl acid and auxin indole-3-butyric acid (IBA) and the amino acid glutamine as substrates...
February 8, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29462363/a-gene-regulatory-network-for-cellular-reprogramming-in-plant-regeneration
#8
Momoko Ikeuchi, Michitaro Shibata, Bart Rymen, Akira Iwase, Anne-Maarit Bågman, Lewis Watt, Duncan Coleman, David S Favero, Tatsuya Takahashi, Sebastian E Ahnert, Siobhan M Brady, Keiko Sugimoto
Wounding triggers organ regeneration in many plant species, and application of plant hormones, such as auxin and cytokinin, enhances their regenerative capacities in tissue culture. Recent studies have identified several key players mediating wound- and/or plant hormone-induced cellular reprogramming, but the global architecture of gene regulatory relationships underlying plant cellular reprogramming is still far from clear. In this study, we uncovered a gene regulatory network (GRN) associated with plant cellular reprogramming by using an enhanced yeast one-hybrid (eY1H) screen systematically to identify regulatory relationships between 252 transcription factors (TFs) and 48 promoters...
February 15, 2018: Plant & Cell Physiology
https://www.readbyqxmd.com/read/29461641/mutational-studies-of-the-aux-iaa-proteins-in-physcomitrella-reveal-novel-insights-into-their-function
#9
Sibo Tao, Mark Estelle
The plant hormone auxin regulates many aspects of plant growth and development. Auxin signaling involves hormone perception by the TRANSPORT INHIBITOR RESPONSE/AUXIN F-BOX (TIR1/AFB)-Aux/IAA co-receptor system, and the subsequent degradation of the Aux/IAA transcriptional repressors by the ubiquitin proteasome pathway. This leads to the activation of downstream gene expression and diverse physiological responses. Here, we investigate how the structural elements in the Aux/IAAs determine their function in Auxin perception and transcriptional repression...
February 20, 2018: New Phytologist
https://www.readbyqxmd.com/read/29459728/silencing-slmed18-tomato-mediator-subunit-18-gene-restricts-internode-elongation-and-leaf-expansion
#10
Yunshu Wang, Zongli Hu, Jianling Zhang, XiaoHui Yu, Jun-E Guo, Honglian Liang, Changguang Liao, Guoping Chen
Mediator complex, a conserved multi-protein, is necessary for controlling RNA polymerase II (Pol II) transcription in eukaryotes. Given little is known about them in tomato, a tomato Mediator subunit 18 gene was isolated and named SlMED18. To further explore the function of SlMED18, the transgenic tomato plants targeting SlMED18 by RNAi-mediated gene silencing were generated. The SlMED18-RNAi lines exhibited multiple developmental defects, including smaller size and slower growth rate of plant and significantly smaller compound leaves...
February 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29458178/direct-convergence-of-light-and-auxin-signaling-pathways-in-arabidopsis
#11
Enamul Huq
No abstract text is available yet for this article.
February 16, 2018: Molecular Plant
https://www.readbyqxmd.com/read/29450949/pre3-and-wox11-transcription-factors-are-involved-in-the-formation-of-new-lateral-roots-from-secondary-growth-taproot-in-a-thaliana
#12
B Baesso, D Chiatante, M Terzaghi, D Zenga, K Nieminen, A P Mahonen, R Siligato, Y Heliariutta, G S Scippa, A Montagnoli
The spatial deployment of lateral roots determines the ability of a plant to interact with the surrounding environment for nutrition and anchorage. This paper shows that besides the pericycle, the vascular cambium, becoming active in Arabidopsis thaliana taproot at a later stage of development, is also able to form new lateral roots. Demonstration of this event required the implementation of a two-step approach in which the first leads to development of a secondary structure in A. thaliana taproot, and the second applies a mechanical stress on the vascular cambium to initiate the formation of a new lateral root primordium...
February 16, 2018: Plant Biology
https://www.readbyqxmd.com/read/29450118/elite-hairy-roots-of-raphanus-sativus-l-as-a-source-of-antioxidants-and-flavonoids
#13
Muthusamy Balasubramanian, Murugesan Anbumegala, Ramasamy Surendran, Muthukrishnan Arun, Girija Shanmugam
An efficient protocol for hairy root induction in radish was established by optimizing several parameters that affect the efficiency of Agrobacterium rhizogenes -mediated transformations. Explants wounded using sterile hypodermic needle, infected with Agrobacterium suspension (0.6 OD 600 ) for 10 min and co-cultivated in 1/2 MS medium containing acetosyringone (100 µM) for 2 days displayed maximum percentage of hairy root induction using MTCC 2364 (77.6%) and MTCC 532 (67.6%). On further experiments with MTCC 2364 initiated hairy roots, maximum biomass accumulation (fresh weight = 9...
February 2018: 3 Biotech
https://www.readbyqxmd.com/read/29448155/characterization-of-a-superman-like-gene-mdsup11-in-apple-malus-%C3%A3-domestica-borkh
#14
Ke Xu, LiMin Wang, Na Liu, Xuan Xie, YuanDi Zhu
Arabidopsis SUPERMAN and its family members of its family play important roles in plant growth and floral organ development; yet much less is known about their functions expanding in apple tree development. Previous work has identified 12 SUP-like genes in the apple (Malus × domestica Borkh.) genome, and the MdSUP11 which is expressed in both vegetative and reproductive organs of apple. However, the function of MdSUP11 remains obscure. In this study, the β-glucuronidase expression driven by the MdSUP11 native promoter was detected in roots, young leaves, and floral organs of transgenic Arabidopsis...
December 6, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29448154/a-serine-carboxypeptidase-like-acyltransferase-catalyzes-synthesis-of-indole-3-acetic-iaa-ester-conjugate-in-rice-oryza-sativa
#15
Anna Ciarkowska, Maciej Ostrowski, Anna Jakubowska
Indole-3-acetic acid (IAA) conjugation is one of mechanisms responsible for regulation of free auxin levels in plants. A new member of the serine carboxypeptidase-like (SCPL) acyltransferases family from Oryza sativa has been cloned and characterized. 1-O-indole-3-acetyl-β-D-glucose (1-O-IAGlc): myo-inositol acyltransferase (IAInos synthase) is an enzyme of IAA ester conjugates biosynthesis pathway that catalyzes transfer of IAA moiety from 1-O-IAGlc to myo-inositol forming IA-myo-inositol (IAInos). The OsIAA-At cDNA has been cloned and expressed using yeast and bacterial expression systems...
February 9, 2018: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29446441/ospin2-which-encodes-a-member-of-the-auxin-efflux-carrier-proteins-is-involved-in-root-elongation-growth-and-lateral-root-formation-patterns-via-the-regulation-of-auxin-distribution-in-rice
#16
Hiroki Inahashi, Israt Jahan Shelley, Takaki Yamauchi, Shunsaku Nishiuchi, Misuzu Takahashi-Nosaka, Maya Matsunami, Atsushi Ogawa, Yusaku Noda, Yoshiaki Inukai
Auxin flow is important for different root developmental processes such as root formation, emergence, elongation and gravitropism. However, the detailed information about the mechanisms regulating the auxin flow is less well understood in rice. We characterized the auxin transport-related mutants, Ospin-formed2-1 (Ospin2-1) and Ospin2-2, which exhibited curly root phenotypes and altered lateral root-formation patterns in rice. The OsPIN2 gene encodes a member of the auxin-efflux carrier proteins that possibly regulates the basipetal auxin flow from the root tip towards the root-elongation zone...
February 15, 2018: Physiologia Plantarum
https://www.readbyqxmd.com/read/29445382/innovative-approaches-to-evaluate-sugar-beet-responses-to-changes-in-sulfate-availability
#17
Piergiorgio Stevanato, Chiara Broccanello, Vita M C Moliterni, Giuseppe Mandolino, Valeria Barone, Luigi Lucini, Giovanni Bertoldo, Marco Bertaggia, Massimo Cagnin, Diego Pizzeghello, Andrea Baglieri, Andrea Squartini, Giuseppe Concheri, Serenella Nardi
In this study, a system based on omics profiling was set-up for sugar beet ( Beta vulgaris L. subsp. vulgaris ) evaluation after changes in sulfate availability. Seedlings were grown on sulfate-deprived Hoagland solution. Six days after germination, 100 μM MgSO 4 was added to the solution. Root samples were collected 36 h after treatments. WinRHIZO root-scanning approach was used for the automated image analysis of plant root morphology. Inductively Coupled Plasma Spectrometry (ICP-OES) and quadrupole-time-of-flight mass spectrometry (Q-TOF) were used for ionomic and metabolic analysis, respectively...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29445121/tomato-auxin-response-factor-5-regulates-fruit-set-and-development-via-the-mediation-of-auxin-and-gibberellin-signaling
#18
Songyu Liu, Youwei Zhang, Qiushuo Feng, Li Qin, Changtian Pan, Anthony Tumbeh Lamin-Samu, Gang Lu
Auxin response factors (ARFs) encode transcriptional factors that function in the regulation of plant development processes. A tomato ARF gene, SlARF5, was observed to be expressed at high levels in emasculated ovaries but maintained low expression levels in pollinated ovaries. The amiRNA SlARF5 lines exhibited ovary growth and formed seedless fruits following emasculation. These parthenocarpic fruits developed fewer locular tissues, and the fruit size and weight were decreased in transgenic lines compared to those of wild-type fruits...
February 14, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29441084/auxin-to-gibberellin-ratio-as-a-signal-for-light-intensity-and-quality-in-regulating-soybean-growth-and-matter-partitioning
#19
Feng Yang, Yuanfang Fan, Xiaoling Wu, Yajiao Cheng, Qinlin Liu, Lingyang Feng, Junxu Chen, Zhonglin Wang, Xiaochun Wang, Taiwen Yong, Weiguo Liu, Jiang Liu, Junbo Du, Kai Shu, Wenyu Yang
The intensity and quality (red to far-red (R/Fr) ratio) of light directly affect growth of plant under shading. Gibberellins (GAs) and auxin [indole-3-acetic acid (IAA)] play important roles in mediating the shading adaptive responses of plants. Thus, the intensity and quality of the uncoupling light from shading were assessed to identify the influence of each component on the morphology and matter distribution of the leaf, stem, and petiole. This assessment was based on the changes in endogenous Gibberellin 1 (GA1) and IAA levels...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29439211/comparative-analysis-of-arabidopsis-ecotypes-reveals-a-role-for-brassinosteroids-in-root-hydrotropism
#20
Rui Miao, Meng Wang, Wei Yuan, Yan Ren, Ying Li, Na Zhang, Jianhua Zhang, Herbert J Kronzucker, Weifeng Xu
Plant root responds to soil moisture gradients through hydrotropism and remodels root growth orientation chasing soil water, a process regarded as plant acclimation to a changing soil environment. Mechanisms underlying the root hydrotropic response, however, remain poorly understood. Here, hydrotropism was examined in 31 Arabidopsis ecotypes collected from different parts of the world and grown along moisture gradients in a specially designed soil-simulation system. More detailed comparative transcriptomic, ionomic profiling, and physiological analyses were carried out on three wild types, Ws (strongly hydrotropic), Col-0 (moderately hydrotropic), and C24 (weakly hydrotropic), and also in mutant lines showing disruptions in the root hydrotropic response...
February 8, 2018: Plant Physiology
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