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https://www.readbyqxmd.com/read/28213361/a-histone-chaperone-and-a-specific-transcription-factor-modulate-glabra2-expression-in-root-hair-development
#1
Jennifer Mach
No abstract text is available yet for this article.
February 17, 2017: Plant Cell
https://www.readbyqxmd.com/read/28205242/one-way-or-another-iron-uptake-in-plants
#2
Huei-Hsuan Tsai, Wolfgang Schmidt
Iron (Fe) and phosphorus (P), the latter taken up by plants as phosphate (Pi), are two essential nutrients that determine species distribution and often limit crop yield as a result of their low availability in most soils. Pi-deficient plants improve the interception of Pi by increasing the density of root hairs, thereby expanding the volume of soil to be explored. The increase in root hair frequency results mainly from attenuated primary root growth, a process that was shown to be dependent on the availability of external Fe...
February 16, 2017: New Phytologist
https://www.readbyqxmd.com/read/28202726/two-tonoplast-mate-proteins-function-as-turgor-regulating-chloride-channels-in-arabidopsis
#3
Haiwen Zhang, Fu-Geng Zhao, Ren-Jie Tang, Yuexuan Yu, Jiali Song, Yuan Wang, Legong Li, Sheng Luan
The central vacuole in a plant cell occupies the majority of the cellular volume and plays a key role in turgor regulation. The vacuolar membrane (tonoplast) contains a large number of transporters that mediate fluxes of solutes and water, thereby adjusting cell turgor in response to developmental and environmental signals. We report that two tonoplast Detoxification efflux carrier (DTX)/Multidrug and Toxic Compound Extrusion (MATE) transporters, DTX33 and DTX35, function as chloride channels essential for turgor regulation in Arabidopsis Ectopic expression of each transporter in Nicotiana benthamiana mesophyll cells elicited a large voltage-dependent inward chloride current across the tonoplast, showing that DTX33 and DTX35 each constitute a functional channel...
February 15, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28199938/assessment-of-multiple-exposure-to-chemical-elements-and-health-risks-among-residents-near-huodehong-lead-zinc-mining-area-in-yunnan-southwest-china
#4
Yirun Wang, Ruming Wang, Liyun Fan, Tiantian Chen, Yahong Bai, Qianru Yu, Ying Liu
The contents of chemical elements (Cd, Cr, Cu, Pb and Zn) in 11 kinds of crop/vegetables and soils around the Huodehong lead-zinc mining area in Yunnan, Southwest China were determined by using inductive coupled plasma emission spectrometry (ICP-MS). Results showed that element contents in soils decreased in the order of Zn > Pb > Cr > Cu > Cd. The high geo-accumulation indexes (Igeo) showed that cultivated soils near mine were practically polluted by Cd, Pb and Zn. The contents of Cd, Cr and Pb in crop/vegetables samples were significantly higher than the maximum permissible standard set by China...
January 12, 2017: Chemosphere
https://www.readbyqxmd.com/read/28188422/regulation-of-seedling-growth-by-ethylene-and-the-ethylene-auxin-crosstalk
#5
REVIEW
Yuming Hu, Filip Vandenbussche, Dominique Van Der Straeten
This review highlights that the auxin gradient, established by local auxin biosynthesis and transport, can be controlled by ethylene, and steers seedling growth. A better understanding of the mechanisms in Arabidopsis will increase potential applications in crop species. In dark-grown Arabidopsis seedlings, exogenous ethylene treatment triggers an exaggeration of the apical hook, the inhibition of both hypocotyl and root elongation, and radial swelling of the hypocotyl. These features are predominantly based on the differential cell elongation in different cells/tissues mediated by an auxin gradient...
February 10, 2017: Planta
https://www.readbyqxmd.com/read/28185331/follicular-lipidosis-in-a-dachshund-dog
#6
Marcia M Colodel, Bruno Pietroluongo, Ronaldo Lucas, Kenia B Gomes, Fabrizio Grandi
BACKGROUND: Follicular lipidosis is a rare disease, having only been reported in six Rottweiler dogs. The diagnosis of follicular lipidosis is confirmed by histopathological examination of the affected skin. OBJECTIVE: To report a case of follicular lipidosis in a dachshund dog. ANIMALS: A 13-month-old female dachshund dog, with hypotrichosis on the head and cervical region from 10 months of age. METHODS: Histological examination of skin biopsy specimens...
February 10, 2017: Veterinary Dermatology
https://www.readbyqxmd.com/read/28170296/muse-cells-derived-from-dermal-tissues-can-differentiate-into-melanocytes
#7
Ting Tian, Ru-Zhi Zhang, Yu-Hua Yang, Qi Liu, Di Li, Xiao-Ru Pan
The objective of the authors has been to obtain multilineage-differentiating stress-enduring cells (Muse cells) from primary cultures of dermal fibroblasts, identify their pluripotency, and detect their ability to differentiate into melanocytes. The distribution of SSEA-3-positive cells in human scalp skin was assessed by immunohistochemistry, and the distribution of Oct4, Sox2, Nanog, and SSEA-3-positive cells was determined by immunofluorescence staining. The expression levels of Sox2, Oct4, hKlf4, and Nanog mRNAs and proteins in Muse cells were determined by reverse transcription polymerase chain reaction (RT-PCR) analyses and Western blots, respectively...
February 7, 2017: Cellular Reprogramming
https://www.readbyqxmd.com/read/28167701/aba-suppresses-root-hair-growth-via-obp4-transcriptional-regulator-repression-of-the-rsl2-promoter
#8
Bart Rymen, Ayako Kawamura, Sabine Schaefer, Christian Breuer, Akira Iwase, Michitaro Shibata, Miho Ikeda, Nobutaka Mitsuda, Csaba Koncz, Masaru Ohme-Takagi, Minami Matsui, Keiko Sugimoto
Plants modify organ growth and tune morphogenesis in response to various endogenous and environmental cues. At the cellular level, organ growth is often adjusted by alterations in cell growth but molecular mechanisms underlying this control remain poorly understood. In this study, we identify the DOF-type transcription regulator OBP4 as a repressor of cell growth. Ectopic expression of OBP4 in Arabidopsis inhibits cell growth resulting in severe dwarfism and repression of genes involved in the regulation of water transport, root hair development and stress responses...
February 6, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28157763/effect-of-procedural-related-variables-on-melanocyte-keratinocyte-suspension-transplantation-in-nonsegmental-stable-vitiligo-a-clinical-and-immunocytochemical-study
#9
Bakr Mohamed El-Zawahry, Samia Esmat, Dalia Bassiouny, Naglaa Sameh Zaki, Rehab Sobhi, Marwah A Saleh, Dalia Abdel-Halim, Rehab Hegazy, Heba Gawdat, Nesrin Samir, Marwa El-Hawary, Zeinab El Maadawi, Heba Gouda, Mervat Khorshied
BACKGROUND: Melanocyte-keratinocyte suspension (M-K susp) is gaining popularity for vitiligo treatment. Few studies have addressed procedure-related variables. OBJECTIVE: To assess the effect of different M-K susp procedure-related variables on the clinical outcome in stable vitiligo. METHODS: This prospective multicenter comparative study included 40 cases with nonsegmental stable vitiligo. Donor site was either a skin graft in noncultured epidermal cell suspension (NCECS) or hair follicle units in outer root sheath hair follicle suspension (ORSHFS)...
February 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28157579/glucose-and-sucrose-differentially-modify-cell-proliferation-in-maize-during-germination
#10
Aurora Lara-Núñez, Brendy B García-Ayala, Sara M Garza-Aguilar, Jesús Flores-Sánchez, Victor A Sánchez-Camargo, Carlos E Bravo-Alberto, Sonia Vázquez-Santana, Jorge M Vázquez-Ramos
Glucose and sucrose play a dual role: as carbon and energy sources and as signaling molecules. In order to address the impact that sugars may have on maize seeds during germination, embryo axes were incubated with or without either of the two sugars. Expression of key cell cycle markers and protein abundance, cell patterning and de novo DNA synthesis in root meristem zones were analyzed. Embryo axes without added sugars in imbibition medium were unable to grow after 7 days; in sucrose, embryo axes developed seminal and primary roots with numerous root hairs, whereas in glucose axes showed a twisted morphology, no root hair formation but callus-like structures on adventitious and primary seminal roots...
January 21, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28149680/increased-root-hair-density-by-loss-of-wrky6-in-arabidopsis-thaliana
#11
Markus G Stetter, Martin Benz, Uwe Ludewig
Root hairs are unicellular elongations of certain rhizodermal cells that improve the uptake of sparingly soluble and immobile soil nutrients. Among different Arabidopsis thaliana genotypes, root hair density, length and the local acclimation to low inorganic phosphate (Pi) differs considerably, when analyzed on split agar plates. Here, genome-wide association fine mapping identified significant single nucleotide polymorphisms associated with the increased root hair density in the absence of local phosphate on chromosome 1...
2017: PeerJ
https://www.readbyqxmd.com/read/28138059/srpp-a-cell-wall-protein-is-involved-in-development-and-protection-of-seeds-and-root-hairs-in-arabidopsis-thaliana
#12
Natsuki Tanaka, Hiroshi Uno, Shohei Okuda, Shizuka Gunji, Ali Ferjani, Takashi Aoyama, Masayoshi Maeshima
Enhancement of root hair development in response to phosphate (Pi) deficit has been reported extensively. Root hairs are involved in major root functions such as the absorption of water, acquisition of nutrients, and secretion of organic acids and enzymes. Individual root hair cells maintain these functions and appropriate structure under various physiological conditions. We examined to identify protein(s), which keep the structure and function of root hairs, and identified a protein (SEED AND ROOT HAIR PROTECTIVE PROTEIN, SRPP) that was induced in root hairs under Pi deficient conditions...
January 30, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28138017/the-histone-chaperone-nrp1-interacts-with-werewolf-to-activate-glabra2-in-arabidopsis-root-hair-development
#13
Yan Zhu, Liang Rong, Qiang Luo, Baihui Wang, Nana Zhou, Yue Yang, Chi Zhang, Haiyang Feng, Lina Zheng, Wen-Hui Shen, Jinbiao Ma, Aiwu Dong
Nucleosome Assembly Protein 1 (NAP1) defines an evolutionarily conserved family of histone chaperones and loss-of-function of the Arabidopsis thaliana NAP1-family genes NAP1-RELATED PROTEIN 1 (NRP1) and NRP2 causes abnormal root hair formation. Yet, the underlying molecular mechanisms remain unclear. Here, we show that NRP1 interacts with the transcription factor WEREWOLF (WER) in vitro and in vivo and enriches at the GLABRA2 (GL2) promoter in a WER-dependent manner. Crystallographic analysis indicates that NRP1 forms a dimer via its N-terminal α-helix...
January 30, 2017: Plant Cell
https://www.readbyqxmd.com/read/28107768/arabidopsis-protein-s-acyl-transferase4-mediates-root-hair-growth
#14
Zhi-Yuan Wan, Sen Chai, Fu-Rong Ge, Qiang-Nan Feng, Yan Zhang, Sha Li
Polar growth of root hairs is critical for plant survival and necessitates fine-tuned ROP signaling. Multiple ROP regulators participate in root hair growth. However, protein S-acyl transferases (PATs), mediating the S-acylation and membrane partitioning of ROPs, are yet to be found. By using a reverse genetic approach, combining fluorescence probes, pharmacological drugs, site-directed mutagenesis, and genetic analysis with related root-hair mutants, we have identified and characterized an Arabidopsis PAT, which may be responsible for ROP2 S-acylation in root hairs...
January 20, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28106918/divergent-cytosine-dna-methylation-patterns-in-single-cell-soybean-root-hairs
#15
Md Shakhawat Hossain, Taiji Kawakatsu, Kyung Do Kim, Zhang Ning, Cuong T Nguyen, Saad M Khan, Josef M Batek, Trupti Joshi, Jeremy Schmutz, Jane Grimwood, Robert J Schmitz, Dong Xu, Scott A Jackson, Joseph R Ecker, Gary Stacey
Chromatin modifications, such as cytosine methylation of DNA, play a significant role in mediating gene expression in plants, which affects growth, development, and cell differentiation. As root hairs are single-cell extensions of the root epidermis and the primary organs for water uptake and nutrients, we sought to use root hairs as a single-cell model system to measure the impact of environmental stress. We measured changes in cytosine DNA methylation in single-cell root hairs as compared with multicellular stripped roots, as well as in response to heat stress...
January 20, 2017: New Phytologist
https://www.readbyqxmd.com/read/28106141/mycorrhizal-trifoliate-orange-has-greater-root-adaptation-of-morphology-and-phytohormones-in-response-to-drought-stress
#16
Ying-Ning Zou, Peng Wang, Chun-Yan Liu, Qiu-Dan Ni, De-Jian Zhang, Qiang-Sheng Wu
Plant roots are the first parts of plants to face drought stress (DS), and thus root modification is important for plants to adapt to drought. We hypothesized that the roots of arbuscular mycorrhizal (AM) plants exhibit better adaptation in terms of morphology and phytohormones under DS. Trifoliate orange seedlings inoculated with Diversispora versiformis were subjected to well-watered (WW) and DS conditions for 6 weeks. AM seedlings exhibited better growth performance and significantly greater number of 1(st), 2(nd), and 3(rd) order lateral roots, root length, area, average diameter, volume, tips, forks, and crossings than non-AM seedlings under both WW and DS conditions...
January 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28105227/milia-may-originate-from-the-outermost-layers-of-the-hair-bulge-of-the-outer-root-sheath-a-case-report
#17
Ichiro Kurokawa, Ayako Kakuno, Airo Tsubura
It has been hypothesized that milia originate from the hair bulge of the outer root sheath. To elucidate the histogenesis of milia, an immunohistochemical study was performed using anti-keratin and anti-filaggrin antibodies to determine the levels of keratin and filaggrin expression. Keratin expression was evaluated using anti-keratin antibodies against K1, K7, K8, K10, K14, K15, K16, K17, K18, K19 and K20. K1 and K10 expression were detected in the suprabasal layers of the more superficial section of the cyst walls, but not in the deeper section of the cyst walls...
December 2016: Oncology Letters
https://www.readbyqxmd.com/read/28104018/-the-ultrastructure-of-utricular-maculae-of-mouse
#18
L J Yang, L J Li, T Liu, L W Wang, P Shen
Objective: Using scanning electron microscope to observe the ultrastructure of utricular maculae of mouse. Methods: Ten young (6 to 8 weeks) and ten old (>12 months) mice were executed, and their utricles were harvested and the specimens were processed, using scanning electron microscope to observe the structures of the utricles from the surface of otoconia layer to the roots of hair cell cilia. Results: Under the scanning electron microscope, several ultrastructures were observed, including otoconia layer, unstructured gelatinous extracellular matrix layer, honeycomb-like gelatinous extracellular matrix layer, inter-cilia otoconia and hair cell cilia associated with these structures...
January 7, 2017: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/28099203/evaluation-of-gene-expression-patterns-in-micrografts-demonstrate-induction-of-catagen-like-processes-during-storage
#19
Walter Krugluger, Karl Stiefsohn, Karl Moser, Claudia Moser, Katarina Laciak
BACKGROUND: Alterations of gene expression patterns may contribute to the commonly observed transient reduction of hair shaft elongation in hair restoration surgery. OBJECTIVE: To elucidate the molecular causes, we evaluated changes in gene expression patterns in hair follicle micrografts during storage. MATERIALS AND METHODS: Micrografts with different amounts of adjacent connective tissue (regular, skinny, and chubby) were stored for different periods, and the expression of key genes was determined: dermal papilla (DP): FGF7, alkaline phosphatase (ALP), versican; outer root sheath: Krt15; inner root sheath: Krt 25; cuticula: Krt85; Henle layer: filaggrin; genes related to apoptosis and growth/differentiation: Caspase 3, Ovol1, and Foxo1...
February 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28096376/myosin-driven-transport-network-in-plants
#20
Elizabeth G Kurth, Valera V Peremyslov, Hannah L Turner, Kira S Makarova, Jaime Iranzo, Sergei L Mekhedov, Eugene V Koonin, Valerian V Dolja
We investigate the myosin XI-driven transport network in Arabidopsis using protein-protein interaction, subcellular localization, gene knockout, and bioinformatics analyses. The two major groups of nodes in this network are myosins XI and their membrane-anchored receptors (MyoB) that, together, drive endomembrane trafficking and cytoplasmic streaming in the plant cells. The network shows high node connectivity and is dominated by generalists, with a smaller fraction of more specialized myosins and receptors...
January 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
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