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Shedding Light on Large-Scale Chromatin Reorganization in Arabidopsis thaliana

Molecular Plant 2012年第3期5卷 583-590页

作者： martijn van zanten Federico Tessadori Anton J.M. Peeters Paul Fransz Molecular Plant Physiology Institute of Environmental Biology Utrecht University Padualaan 8 3584 CH Utrecht The Netherlands Department of Plant Breeding and Genetics Max Planck Institute for Plant Breeding Research Carl-von-Linne＇-weg 10 50829 Cologne Germany Cardiac Development and Genetics Group Hubrecht Institute for Developmental Biology and Stem Cell Research Uppsalalaan 8 3584 CT Utrecht The Netherlands Plant Ecophysiology Institute of Environmental Biology Utrecht University Padualaan 8 3584 CH Utrecht The Netherlands Nuclear Organization Group Swammerdam Institute for Life Sciences University of Amsterdam Kruislaan 318 1098 SM Amsterdam The Netherlands

Plants need to respond quickly and appropriately to various types of light signals from the environment to optimize growth and development. The immediate response to shading, reduced photon flux （low light）, and changes in spectral quality involves changes in gene regulation. In the case of more persistent shade, the plant shows a dramatic change in the organization of chromatin. Both plant responses are controlled via photoreceptor signaling proteins. Re- cently, several studies have revealed similar features of chromatin reorganization in response to various abiotic and biotic signals, while others have unveiled intricate molecular networks of light signaling towards gene regulation. This opinion paper briefly describes the chromatin （de）compaction response from a light-signaling perspective to provide a link be- tween chromatin and the molecular network of photoreceptors and E3 ubiquitin ligase complexes.

关键词： light signaling chromatin compaction molecular network Arabidopsis

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Illumina Sequencing Technology as a Method of Identifying T-DNA Insertion Loci in Activation- Tagged Arabidopsis thaliana Plants

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Molecular Plant 2012年第4期5卷 948-950页

作者： Joanna K. Polko Mohamed-Ramzi Temanni martijn van zanten Wilbert van Workum Sven Iburg Ronald Pierik Laurentius A.C.J. Voesenek Anton J.M. Peeters Plant Ecophysiology Institute of Environmental Biology Utrecht University Padualaan 8 3584 CH Utrecht The Netherlands ServiceXS BV Plesmanlaan ld 2333 BZ Leiden The Netherlands Department of Cell Biology and Molecular Genetics Maryland Pathogen Research Institute (MPRI) 3128 Biosciences Research Bldg University of Maryland College Park MD 20742 USA Molecular Plant Physiology Institute of Environmental Biology Utrecht University Padualaan 8 3584 CH Utrecht The Netherlands

Dear Editor, Forward genetic screens are commonly used as unbiased tools to isolate genes responsible for a phenotype of interest. In Arabidopsis thaliana, especially T-DNA activation tagging pop- ulations are frequently employed. These populations are gener- ated using vectors containing multiple copies of the constitutive 35S promoters derived from cau and often result in isolation i flower mosaic virus （35S CaMV） of dominant gain-of-function alleles （Weigel et al., 2000; Nakazawa et al., 2003）. This allows the study of members of large gene families that are often func- tionally redundant and, therefore, hard to identify in loss-of- function screens. Moreover, due to the dominant nature,

关键词： T-DNA 激活标签拟南芥测序技术插入位点 35S启动子识别中国农业大学

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