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  • 1
    Publikationsdatum: 2006-01-10
    Beschreibung: The cell lineages that form the transporting tissues (xylem and phloem) and the intervening pluripotent procambial tissue originate from stem cells near the root tip. We demonstrate that in Arabidopsis, cytokinin phytohormones negatively regulate protoxylem specification. AHP6, an inhibitory pseudophosphotransfer protein, counteracts cytokinin signaling, allowing protoxylem formation. Conversely, cytokinin signaling negatively regulates the spatial domain of AHP6 expression. Thus, by controlling the identity of cell lineages, the reciprocal interaction of cytokinin signaling and its spatially specific modulator regulates proliferation and differentiation of cell lineages during vascular development, demonstrating a previously unrecognized regulatory circuit underlying meristem organization.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mahonen, Ari Pekka -- Bishopp, Anthony -- Higuchi, Masayuki -- Nieminen, Kaisa M -- Kinoshita, Kaori -- Tormakangas, Kirsi -- Ikeda, Yoshihisa -- Oka, Atsuhiro -- Kakimoto, Tatsuo -- Helariutta, Yka -- New York, N.Y. -- Science. 2006 Jan 6;311(5757):94-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Plant Molecular Biology Laboratory, Institute of Biotechnology, POB 56, FI-00014, University of Helsinki, Finland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16400151" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adenosine Triphosphate/metabolism ; Alleles ; Arabidopsis/*cytology/genetics/growth & development/*metabolism ; Arabidopsis Proteins/genetics/*metabolism/physiology ; Cell Differentiation ; Cell Division ; Cell Lineage ; Cloning, Molecular ; Cytokinins/*metabolism ; Genes, Plant ; Kinetin/metabolism/pharmacology ; Meristem/cytology/growth & development/metabolism ; Morphogenesis ; Phenotype ; Phosphorylation ; Plant Growth Regulators/*metabolism ; Plant Roots/*cytology/growth & development/metabolism ; Plant Shoots/metabolism ; Plants, Genetically Modified ; *Signal Transduction ; Suppression, Genetic ; Zeatin/metabolism/pharmacology
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Publikationsdatum: 2003-05-31
    Beschreibung: The root-hair pattern of Arabidopsis is determined through a regulatory circuit composed of transcription factor genes. The homeobox gene GLABRA2 (GL2) has been considered a key component, acting farthest downstream in this regulation. GL2 modified to include a transactivating function caused epidermal cells to develop ectopic root hairs or root hair-like structures. With this system, the phospholipase Dzeta1 gene (AtPLDzeta1) was identified as a direct target of GL2. Inducible expression of AtPLDzeta1 promoted ectopic root-hair initiation. We conclude that GL2 exerts its regulatory effect on root-hair development through modulation of phospholipid signaling.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ohashi, Yohei -- Oka, Atsuhiro -- Rodrigues-Pousada, Renato -- Possenti, Marco -- Ruberti, Ida -- Morelli, Giorgio -- Aoyama, Takashi -- New York, N.Y. -- Science. 2003 May 30;300(5624):1427-30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12775839" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Arabidopsis/*genetics/growth & development/*metabolism ; Arabidopsis Proteins/chemistry/*genetics/*metabolism ; Dexamethasone/pharmacology ; Gene Expression Regulation, Plant ; Genes, Plant ; Homeodomain Proteins/chemistry/genetics/*metabolism ; Morphogenesis ; Phospholipase D/*genetics/metabolism ; Phospholipids/*metabolism ; Plant Epidermis/cytology/metabolism ; Plant Roots/cytology/*growth & development/metabolism ; Plants, Genetically Modified ; Promoter Regions, Genetic ; *Signal Transduction
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 3
    Publikationsdatum: 2009-12-17
    Beschreibung: Asia harbors substantial cultural and linguistic diversity, but the geographic structure of genetic variation across the continent remains enigmatic. Here we report a large-scale survey of autosomal variation from a broad geographic sample of Asian human populations. Our results show that genetic ancestry is strongly correlated with linguistic affiliations as well as geography. Most populations show relatedness within ethnic/linguistic groups, despite prevalent gene flow among populations. More than 90% of East Asian (EA) haplotypes could be found in either Southeast Asian (SEA) or Central-South Asian (CSA) populations and show clinal structure with haplotype diversity decreasing from south to north. Furthermore, 50% of EA haplotypes were found in SEA only and 5% were found in CSA only, indicating that SEA was a major geographic source of EA populations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉HUGO Pan-Asian SNP Consortium -- Abdulla, Mahmood Ameen -- Ahmed, Ikhlak -- Assawamakin, Anunchai -- Bhak, Jong -- Brahmachari, Samir K -- Calacal, Gayvelline C -- Chaurasia, Amit -- Chen, Chien-Hsiun -- Chen, Jieming -- Chen, Yuan-Tsong -- Chu, Jiayou -- Cutiongco-de la Paz, Eva Maria C -- De Ungria, Maria Corazon A -- Delfin, Frederick C -- Edo, Juli -- Fuchareon, Suthat -- Ghang, Ho -- Gojobori, Takashi -- Han, Junsong -- Ho, Sheng-Feng -- Hoh, Boon Peng -- Huang, Wei -- Inoko, Hidetoshi -- Jha, Pankaj -- Jinam, Timothy A -- Jin, Li -- Jung, Jongsun -- Kangwanpong, Daoroong -- Kampuansai, Jatupol -- Kennedy, Giulia C -- Khurana, Preeti -- Kim, Hyung-Lae -- Kim, Kwangjoong -- Kim, Sangsoo -- Kim, Woo-Yeon -- Kimm, Kuchan -- Kimura, Ryosuke -- Koike, Tomohiro -- Kulawonganunchai, Supasak -- Kumar, Vikrant -- Lai, Poh San -- Lee, Jong-Young -- Lee, Sunghoon -- Liu, Edison T -- Majumder, Partha P -- Mandapati, Kiran Kumar -- Marzuki, Sangkot -- Mitchell, Wayne -- Mukerji, Mitali -- Naritomi, Kenji -- Ngamphiw, Chumpol -- Niikawa, Norio -- Nishida, Nao -- Oh, Bermseok -- Oh, Sangho -- Ohashi, Jun -- Oka, Akira -- Ong, Rick -- Padilla, Carmencita D -- Palittapongarnpim, Prasit -- Perdigon, Henry B -- Phipps, Maude Elvira -- Png, Eileen -- Sakaki, Yoshiyuki -- Salvador, Jazelyn M -- Sandraling, Yuliana -- Scaria, Vinod -- Seielstad, Mark -- Sidek, Mohd Ros -- Sinha, Amit -- Srikummool, Metawee -- Sudoyo, Herawati -- Sugano, Sumio -- Suryadi, Helena -- Suzuki, Yoshiyuki -- Tabbada, Kristina A -- Tan, Adrian -- Tokunaga, Katsushi -- Tongsima, Sissades -- Villamor, Lilian P -- Wang, Eric -- Wang, Ying -- Wang, Haifeng -- Wu, Jer-Yuarn -- Xiao, Huasheng -- Xu, Shuhua -- Yang, Jin Ok -- Shugart, Yin Yao -- Yoo, Hyang-Sook -- Yuan, Wentao -- Zhao, Guoping -- Zilfalil, Bin Alwi -- Indian Genome Variation Consortium -- New York, N.Y. -- Science. 2009 Dec 11;326(5959):1541-5. doi: 10.1126/science.1177074.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20007900" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Algorithms ; Asia ; Asian Continental Ancestry Group/*genetics/history ; Bayes Theorem ; Cluster Analysis ; *Emigration and Immigration/history ; Ethnic Groups/*genetics/history ; Gene Flow ; Genotype ; Geography ; *Haplotypes ; History, Ancient ; Humans ; Language ; Linguistics ; Oligonucleotide Array Sequence Analysis ; Phylogeny ; *Polymorphism, Single Nucleotide ; Principal Component Analysis
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
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