Volume 19 Number 10 October 2007

The electronic form of this issue, available at www.plantcell.org, is the journal of record.

EDITORIAL

Rewarding Collaboration 2967

Rich Jorgensen

IN THIS ISSUE

Measuring Daylength: Pharbitis Takes a Different Approach 2968

Nancy A. Eckardt

IN BRIEF

GA Signaling: Direct Targets of DELLA Proteins 2970

MIDGET and the Function of Topoisomerase VI in ArabidopsisNancy A. Eckardt

LETTERS TO THE EDITOR

Translational Genomics for Bioenergy Production: There’s Room for MoreThan One Model

2971

Daniel R. Bush and Jan E. Leach

Reply: Specific Reasons to Favor Maize in the U.S. 2973

Carolyn Lawrence and Virginia Walbot

RESEARCH ARTICLES

Arabidopsis Relatives of the Human Lysine-Specific Demethylase1Repress the Expression of FWA and FLOWERING LOCUS C and ThusPromote the Floral Transition W

2975

Danhua Jiang, Wannian Yang, Yuehui He, and Richard M. Amasino

A Circadian Rhythm Set by Dusk Determines the Expression of FT Homologsand the Short-Day Photoperiodic Flowering Response in Pharbitis W OA

2988

Ryosuke Hayama, Bhavna Agashe, Elisabeth Luley, Rod King, andGeorge Coupland

MPB2C, a Microtubule-Associated Protein, Regulates Non-Cell-Autonomy ofthe Homeodomain Protein KNOTTED1 W OA

3001

Nikola Winter, Gregor Kollwig, Shoudong Zhang, and Friedrich Kragler

Two Calcium-Dependent Protein Kinases, CPK4 and CPK11, RegulateAbscisic Acid Signal Transduction in Arabidopsis W

3019

Sai-Yong Zhu, Xiang-Chun Yu, Xiao-Jing Wang, Rui Zhao, Yan Li,Ren-Chun Fan, Yi Shang, Shu-Yuan Du, Xiao-Fang Wang, Fu-Qing Wu,Yan-Hong Xu, Xiao-Yan Zhang, and Da-Peng Zhang

ON THE COVER

Numerous studies on viral move-

ment proteins and endogenous

plant proteins have provided evi-

dence for the existence of a non-

cell-autonomous protein (NCAP)

signaling pathway via plasmodes-

mata. An important class of NCAP

is represented by KNOTTED1-like

homedomain proteins that play

key roles in meristems, such as

maizeKN1andclosely relatedArabi-

dopsis STM. Winter et al. (pages

3001–3018) identified the Tobacco

mosaic virus movement protein

binding protein MPB2C in Nicotiana

and its homolog in Arabidopsis as

homeodomain interacting proteins

specifically recognizing STM and

KN1. The authors show that MPB2C

negatively regulates KN1 associa-

tion to plasmodesmata and thus

plays an important role in cell-to-cell

trafficking of NCAPs. The cover

shows a false-colored confocal

image of a guard cell expressing

cytosolic GFP and a microtubule-

associated MPB2C-RFP fusion

protein.

Global Analysis of DELLA Direct Targets in Early Gibberellin Signalingin Arabidopsis W

3037

Rodolfo Zentella, Zhong-Lin Zhang, Mehea Park, Stephen G. Thomas,Akira Endo, Kohji Murase, Christine M. Fleet, Yusuke Jikumaru, Eiji Nambara,Yuji Kamiya, and Tai-ping Sun

The GID1-Mediated Gibberellin Perception Mechanism Is Conserved in theLycophyte Selaginella moellendorffii but Not in the BryophytePhyscomitrella patens W

3058

Ko Hirano, Masatoshi Nakajima, Kenji Asano, Tomoaki Nishiyama,Hitoshi Sakakibara, Mikiko Kojima, Etsuko Katoh, Hongyu Xiang,Takako Tanahashi, Mitsuyasu Hasebe, Jo Ann Banks, Motoyuki Ashikari,Hidemi Kitano, Miyako Ueguchi-Tanaka, and Makoto Matsuoka

Differential Requirements for RAD51 in Physcomitrella patens andArabidopsis thaliana Development and DNA Damage Repair W

3080

Ulrich Markmann-Mulisch, Edelgard Wendeler, Oliver Zobell,Gabriele Schween, Hans-Henning Steinbiss, and Bernd Reiss

The Catalytically Active Tyrosine Residues of Both SPO11-1 and SPO11-2Are Required for Meiotic Double-Strand Break Induction in Arabidopsis

3090

Frank Hartung, Rebecca Wurz-Wildersinn, Jorg Fuchs, Ingo Schubert,Stefanie Suer, and Holger Puchta

MIDGET Unravels Functions of the Arabidopsis Topoisomerase VI Complexin DNA Endoreduplication, Chromatin Condensation, andTranscriptional Silencing W

3100

Viktor Kirik, Andrea Schrader, Joachim F. Uhrig, and Martin Hulskamp

Class-Specific Interaction of Profilin and ADF Isovariants with Actin in theRegulation of Plant Development W

3111

Muthugapatti K. Kandasamy, Brunilıs Burgos-Rivera, Elizabeth C. McKinney,Daniel R. Ruzicka, and Richard B. Meagher

Subcellular Localization and Functional Domain Studies of DEFECTIVEKERNEL1 in Maize and Arabidopsis Suggest a Model for Aleurone CellFate Specification Involving CRINKLY4 and SUPERNUMERARYALEURONE LAYER1 W

3127

Qing Tian, Lene Olsen, Beimeng Sun, Stein Erik Lid, Roy C. Brown,Betty E. Lemmon, Kjetil Fosnes, Darren (Fred) Gruis, Hilde-GunnOpsahl-Sorteberg, Marisa S. Otegui, and Odd-Arne Olsen

Arabidopsis Cryptochrome 2 Completes Its Posttranslational Life Cycle inthe Nucleus W

3146

Xuhong Yu, John Klejnot, Xiaoying Zhao, Dror Shalitin, Maskit Maymon,Hongyun Yang, Janet Lee, Xuanming Liu, Javier Lopez, and Chentao Lin

Arabidopsis Cotyledon-Specific Chloroplast Biogenesis Factor CYO1 Isa Protein Disulfide Isomerase W

3157

Hiroshi Shimada, Mariko Mochizuki, Kan Ogura, John E. Froehlich,Katherine W. Osteryoung, Yumiko Shirano, Daisuke Shibata, Shinji Masuda,Kazuki Mori, and Ken-ichiro Takamiya

Proteome Analysis of Arabidopsis Leaf Peroxisomes Reveals Novel TargetingPeptides, Metabolic Pathways, and Defense Mechanisms W

3170

Sigrun Reumann, Lavanya Babujee, Changle Ma, Stephanie Wienkoop,Tanja Siemsen, Gerardo E. Antonicelli, Nicolas Rasche, Franziska Luder,Wolfram Weckwerth, and Olaf Jahn

Manipulation of Phytoene Levels in Tomato Fruit: Effects on Isoprenoids,Plastids, and Intermediary Metabolism W

3194

Paul D. Fraser, Eugenia M.A. Enfissi, John M. Halket, Mark R. Truesdale,Dongmei Yu, Christopher Gerrish, and Peter M. Bramley

Evolution of Cinnamate/p -Coumarate Carboxyl Methyltransferases andTheir Role in the Biosynthesis of Methylcinnamate W

3212

Jeremy Kapteyn, Anthony V. Qualley, Zhengzhi Xie, Eyal Fridman,Natalia Dudareva, and David R. Gang

EDITORIAL BOARD

EditorRichard A. Jorgensen

CoeditorsSarah M. AssmannJody BanksAlice BarkanKathy BartonDavid BaumSebastian BednarekJames BirchlerUlla BonasChristopher BowlerNigel CrawfordXing Wang DengRebecca DoergeMark EstellePascal GenschikJean T. GreenbergThomas GuilfoylePeter HeplerAnn HirschPatricia LeonWilliam LucasCathie MartinMarjori MatzkeKrishna K. NiyogiJoseph NoelMagnus NordborgMichael PalmgrenMarkus PaulyScott C. PeckKaren S. SchumakerDavid SmythUwe SonnewaldChris J. StaigerNicholas J. TalbotMasamitsu Wada

Managing EditorJohn Long

News and Reviews EditorNancy A. Eckardt

Science EditorVacant

Production ManagerSusan L. Entwistle

Manuscript ManagerAnnette Kessler

Publications DirectorNancy A. Winchester

PublisherAmerican Society ofPlant Biologists

Executive Director,Crispin Taylor

Editorial Office15501 Monona DriveRockville, Maryland 20855-2768Telephone: 301/251-0560, ext. 119Fax: 301/279-2996http://www.aspb.org

Online at www.plantcell.org

Enhanced Thermostability of Arabidopsis Rubisco Activase ImprovesPhotosynthesis and Growth Rates under Moderate Heat Stress OA

3230

Itzhak Kurek, Thom Kai Chang, Sean M. Bertain, Alfredo Madrigal, Lu Liu,Michael W. Lassner, and Genhai Zhu

SALT TOLERANCE HOMOLOG2, a B-Box Protein in Arabidopsis That ActivatesTranscription and Positively Regulates Light-Mediated Development W

3242

Sourav Datta, Chamari Hettiarachchi, Henrik Johansson, and Magnus Holm

The Pentatricopeptide Repeat Gene OTP43 Is Required for trans-Splicing ofthe Mitochondrial nad1 Intron 1 in Arabidopsis thaliana W

3256

Andeol Falcon de Longevialle, Etienne H. Meyer, Charles Andres,Nicolas L. Taylor, Claire Lurin, A. Harvey Millar, and Ian D. Small

The Arabidopsis Mitogen-Activated Protein Kinase Kinase MKK3 Is Upstreamof Group C Mitogen-Activated Protein Kinases and Participates inPathogen Signaling W

3266

Robert Doczi, Gunter Brader, Aladar Pettko-Szandtner, Iva Rajh,Armin Djamei, Andrea Pitzschke, Markus Teige, and Heribert Hirt

Polar Growth in the Infectious Hyphae of the Phytopathogen Ustilagomaydis Depends on a Virulence-Specific Cyclin W

3280

Ignacio Flor-Parra, Sonia Castillo-Lluva, and Jose Perez-Martın

Identification and Mutational Analysis of Arabidopsis FLS2 Leucine-RichRepeat Domain Residues That Contribute to Flagellin Perception W

3297

F. Mark Dunning, Wenxian Sun, Kristin L. Jansen, Laura Helft, andAndrew F. Bent

W Online version contains Web-only data.

OA Open Access articles can be viewed online without a subscription.

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