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Molecular Plant 2017年第5期10卷 659-661页

作者： Chi Tam Nguyen enrico martinoia Edward E. Farmer Department of Plant Molecular Biology Biophore University of Lausanne 1015 Lausanne Switzerland Department of Plant and Microbial Biology University of Zurich Zollikerstrasse 107 8008 Zurich Switzerland

Jasmonic acid （JA） and methyl jasmonate （MeJA） are highly mobile and, when applied to intact plants,, these compounds powerfully modulate gene expression. Moreover, activation of jasmonate-responsive genes usually occurs in tissues distal to the treatments. It therefore comes as no surprise that there are jasmonate transporters; these proteins are only now emerging and their discovery is important for a number of reasons. Firstlv.

关键词： Emerging Jasmonate Transporters

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C-Terminus-Mediated Voltage Gating of Arabidopsis Guard Cell Anion Channel QUAC1

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Molecular Plant 2013年第5期6卷 1550-1563页

作者： Patrick Mumm Dennis Imes enrico martinoia Khaled A.S. AI-Rasheid Dietmar Geiger Irene Marten Rainer Hedrich Institute for Molecular Plant Physiology and Biophysics University of Wurzburg Julius-von-Sachs Platz 2 D-97082 Wurzburg Germany Institute of Plant Biology University of Zurich Zollikerstrasse 107 Zurich Switzerland King Saud University Zoology Department College of Science PO Box 2455 Riyadh 11451 Saudi Arabia

Anion transporters in plants play a fundamental role in volume regulation and signaling. Currently, two plasma membrane-located anion channel familiesmSLAC/SLAH and ALMTmare known. Among the ALMT family, the root-expressed ALuminium-activated Malate Transporter 1 was identified by comparison of aluminum-tolerant and Al3＋-sensitive wheat cultivars and was subsequently shown to mediate voltage-independent malate currents. In con- trast, ALMT12/QUAC1 （QUickly activating Anion Channel1） is expressed in guard cells transporting malate in an Al3＋- insensitive and highly voltage-dependent manner. So far, no information is available about the structure and mechanism of voltage-dependent gating with the QUAC1 channel protein. Here, we analyzed gating of QUACl-type currents in the plasma membrane of guard cells and QUACl-expressing oocytes revealing similar voltage dependencies and activation- deactivation kinetics. In the heterologous expression system, QUAC1 was electrophysiologically characterized at increas- ing extra- and intracellular malate concentrations. Thereby, malate additively stimulated the voltage-dependent QUAC1 activity. In search of structural determinants of the gating process, we could not identify transmembrane domains com- mon for voltage-sensitive channels. However, site-directed mutations and deletions at the C-terminus of QUAC1 resulted in altered voltage-dependent channel activity. Interestingly, the replacement of a single glutamate residue, which is con- served in ALMT channels from different clades, by an alanine disrupted QUAC1 activity. Together with C- and N-terminal tagging, these results indicate that the cytosolic C-terminus is involved in the voltage-dependent gating mechanism of QUAC1.

关键词： C-terminal deactivation R-type/QUAC-type anion channel single-channel conductance gating modifier.

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Plant ABC Transporters Enable Many Unique Aspects of a Terrestrial Plant＇s Lifestyle

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Molecular Plant 2016年第3期9卷 338-355页

作者： Jae-Ung Hwang Won-Yong Song Daewoong Hong Donghwi Ko Yasuyo Yamaoka Sunghoon Jang Sojeong Yim Eunjung Lee Deepa Khare Kyungyoon Kim Michael Palmgren Hwan Su Yoon enrico martinoia Youngsook Lee Department of Life Science Pohang University of Science and Technology (POSTECH) Pohang 37673 Korea Division of Integrative Bioscience and Biotechnology POSTECH Pohang 37673 Korea Center for Membrane Pumps in Cells and Disease - PUMPKIN Danish National Research Foundation Department of Plant and Environmental Science University of Copenhagen 1871 Frederiksberg Denmark Department of Biological Sciences Sungkyunkwan University Suwon 16419 Korea Department of Plant and Microbial Biology University Zurich Zurich 8008 Zurich Switzerland

Terrestrial plants have two to four times more ATP-binding cassette （ABC） transporter genes than other organisms, including their ancestral microalgae. Recent studies found that plants harboring mutations in these transporters exhibit dramatic phenotypes, many of which are related to developmental processes and functions necessary for life on dry land. These results suggest that ABC transporters multiplied during evolution and assumed novel functions that allowed plants to adapt to terrestrial environmental conditions. Examining the literature on plant ABC transporters from this viewpoint led us to propose that diverse ABC transporters enabled many unique and essential aspects of a terrestrial plant＇s lifestyle, by transporting various compounds across specific membranes of the plant.

关键词： abscisic acid transporter adaptation to dry (and ATP-binding cassette transporters evolution lifestyle of plants

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Toward a Molecular Understanding of Plant Hormone Actions

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Molecular Plant 2016年第1期9卷 1-3页

作者： Chuanyou Li Jiayang Li Kang Chong Klaus Harter Youngsook Lee Jeffrey Leung enrico martinoia Makoto Matsuoka Remko Offringa Lijia Qu Julian Schroeder Yunde Zhao Department of Physiology Center for Plant Molecular Biology (ZMBP) University of T&uuml bingen Auf der Morgenstelle 32 72076 T&uuml bingen Germany Unit&eacute Propre de Recherche 2355 Centre National de la Recherche Scientifique Institut des Sciences du V&eacute gé tal Saclay Plant Sciences Avenuede la Terrasse B&acirc timent 23 91198 Gif-sur-Yvette Cedex France Cell and Developmental Biology Section Division of Biological Sciences University of California San Diego 9500 Gilman Drive La Jolla CA 92093-0116 USA

Plants rely on a diverse set of small-molecule hormones to regu- late every aspect of their biological processes including develop- ment, growth, and adaptation. Since the discovery of the first plant hormone, auxin, ... 详细信息

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