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  • 1
    Publication Date: 2001-11-03
    Description: Cytokinins are a class of phytohormones involved in various physiological events of plants. The Arabidopsis sensor histidine kinase CRE1 was recently reported to be a cytokinin receptor. We used a steroid-inducible system to show that the transcription factor-type response regulator ARR1 directs transcriptional activation of the ARR6 gene, which responds to cytokinins without de novo protein synthesis. This fact, together with characteristics of ARR1-overexpressing plants and arr1 mutant plants, indicates that the phosphorelay to ARR1, probably from CRE1, constitutes an intracellular signal transduction occurring immediately after cytokinin perception.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sakai, H -- Honma, T -- Aoyama, T -- Sato, S -- Kato, T -- Tabata, S -- Oka, A -- New York, N.Y. -- Science. 2001 Nov 16;294(5546):1519-21. Epub 2001 Nov 1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular Biology, 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/11691951" target="_blank"〉PubMed〈/a〉
    Keywords: Adenine/*analogs & derivatives/*metabolism/pharmacology ; Arabidopsis/cytology/*genetics/growth & development/metabolism ; *Arabidopsis Proteins ; Blotting, Northern ; Cell Division/drug effects ; Cycloheximide/pharmacology ; Cytokinins/*metabolism/pharmacology ; DNA-Binding Proteins/*metabolism ; Dexamethasone/pharmacology ; Gene Expression Regulation, Plant ; *Genes, Plant ; Kinetin ; Phenotype ; Plant Proteins/metabolism ; Plant Roots/drug effects/growth & development ; Plant Shoots/drug effects/growth & development ; Plants, Genetically Modified ; Protein Kinases/metabolism ; Protein Synthesis Inhibitors/pharmacology ; Receptors, Cell Surface/metabolism ; Signal Transduction ; Transcription Factors/*metabolism ; *Transcriptional Activation
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 2006-01-10
    Description: 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〉
    Keywords: 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
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
    Publication Date: 2009-12-17
    Description: 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〉
    Keywords: 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
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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