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Alternative Polyadenylation of the Sense Transcript Controls Antisense Transcription of DELAY OF GERMINATION 1 in Arabidopsis

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Molecular Plant 2017年第10期10卷 1349-1352页

作者： Justyna Kowalczyk Malgorzata Palusinska Agata Wroblewska-Swiniarska Zbigniew Pietras Lukasz Szewc Jakub Dolata Artur Jarmolowski szymon swiezewski Department of Protein Biosynthesis Institute of Biochemistry of Biophysics Polish Academy of Sciences Warsaw Poland Department of Gone Expression Institute of Molecular Biology and Biotechnology Adam Mickiewicz University Poznan Poland

Dear Editor,Seed dormancy is adopted by plants to optimize their reproductive strategy. The DOG 1 （DELAY OF GERMINATION 1） gene is the main QTL controlling this trait in Arabidopsis （Bentsink et al., 2006） and therefore is extensively regulated. This includes the alternative polyadenylation （APA） of DOG1 mRNA （Cyrek et al., 2016） and an antisense transcript, asDOGl, which in cis suppresses DOG1 expression during seed maturation （Fedak et al., 2016）. As with many antisense transcripts （Mellor et al., 2016; Rosa et al., 2016）, asDOG1 originates from close to the transcription termination site of the sense gene. This raises the question of how this proximity affects antisense promoter activity.

关键词： the Sense Transcript Controls Transcription

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Dormancy heterogeneity among Arabidopsis thaliana seeds is linked to individual seed size

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Plant Communications 2024年第2期5卷 215-227页

作者： Michal Krzyszton Sebastian P.Sacharowski Veena Halale Manjunath Katarzyna Muter Grzegorz Bokota Ce Wang Dariusz Plewczynski Tereza Dobisova szymon swiezewski Laboratory of Seeds Molecular Biology Institute of Biochemistry and BiophysicsPAS02-106 WarsawPoland Laboratory of Functional and Structural Genomics Centre of New TechnologiesUniversity of WarsawWarsawPoland Laboratory of Bioinformatics and Computational Genomics Faculty of Mathematics and Information ScienceWarsaw University of TechnologyWarsawPoland Labdeers Ltd. 680-01 BoskoviceCzech Republic

Production of morphologically and physiologically variable seeds is an important strategy that helps plants to survive in unpredictable natural ***,the model plant Arabidopsis thaliana and most agronomically essential crops produce visually homogenous *** automated phenotype analysis,we observed that small seeds in Arabidopsis tend to have higher primary and secondary dormancy levels than large *** analysis revealed distinct gene expression profiles between large and small *** seeds have higher expression of translation-related genes implicated in germination *** contrast,small seeds have elevated expression of many positive regulators of dormancy,including a key regulator of this process,the DOG1 *** in DOG1 expression are associated with differential production of its alternative cleavage and polyadenylation isoforms;in small seeds,the proximal poly(A)site is selected,resulting in a short mRNA ***,single-seed RNA sequencing analysis demonstrated that large seeds resemble DOG1 knockout mutant ***,on the single-seed level,expression of genes affected by seed size is correlated with expression of genes that position seeds on the path toward *** results demonstrate an unexpected link between seed size and dormancy phenotypes in a species that produces highly homogenous seed pools,suggesting that the correlation between seed morphology and physiology is more widespread than initially assumed.

关键词： seed size dormancy DOG1 Arabidopsis

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Sucrose-responsive osmoregulation of plant cell size by a long non-coding RNA

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Molecular Plant 2024年第11期17卷 1719-1732页

作者： Jakub Hajný Tereza Trávnícková Martina pundová Michelle Roenspies R.M.Imtiaz Karim Rony Sebastian Sacharowski Michal Krzyszton David Zalabák Christian S.Hardtke Ales Pecinka Holger Puchta szymon swiezewski Jaimie M.van Norman Ondrej Novák Laboratory of Growth Regulators Czech Academy of SciencesInstitute of Experimental Botany and Palacky UniversitySlechtitelu 2777900 OlomoucCzech Republic Department of Biophysics Faculty of SciencePalacky UniversitySlechtitelu 2777900 OlomoucCzech Republic Joseph Gottlieb Kölreuter Institute for Plant Sciences(JKIP)–Molecular Biology Karlsruhe Institute of Technology76131 KarlsruheGermany Department of Molecular Celland Systems BiologyUniversity of CaliforniaRiversideCA 92521USA Laboratory of Seeds Molecular Biology Institute of Biochemistry and Biophysics Polish Academy of SciencesPawinskiego 5a02-106 WarsawPoland Department of Plant Molecular Biology University of Lausanne1015 LausanneSwitzerland Center of Plant Structural and Functional Genomics Institute of Experimental BotanyCzech Academy of SciencesSlechtitelu 3177900 OlomoucCzech Republic Department of Molecular Celland Developmental BiologyUniversity of CaliforniaLos AngelesLos AngelesCA 90095USA

In plants,sugars are the key source of energy and metabolic building *** systemic transport of sugars is essential for plant growth and *** evolved intricate molecular networks to effectively distribute *** dynamic distribution of these osmotically active compounds is a handy tool for regulating cell turgor pressure,an instructive force in developmental *** this study,we have investigated the molecular mechanism behind the dual role of the receptor-like kinase *** functionally characterized a long non-coding RNA,CARMA,as a negative regulator of *** CARMA specifically fine-tunes CANAR expression in the phloem,the route of sugar *** genetic,molecular,microscopy,and biophysical data suggest that the CARMA–CANAR module controls the shoot-to-root phloem transport of sugars,allows cells to flexibly adapt to the external osmolality by appropriate water uptake,and thus adjust the size of vascular cell types during organ growth and *** study identifies a nexus of plant vascular tissue formation with cell internal pressure monitoring,revealing a novel functional aspect of long non-coding RNAs in developmental biology.

关键词： lncRNA auxin turgor sugar transport cell size

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