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https://www.readbyqxmd.com/read/27895658/overexpression-of-a-hevea-brasiliensis-erbb-3-binding-protein-1-gene-increases-drought-tolerance-and-organ-size-in-arabidopsis
#1
Han Cheng, Xiang Chen, Jianshun Zhu, Huasun Huang
Rubber trees are economically important tropical tree species and the major source of natural rubber, which is an essential industrial material. This tropical perennial tree is susceptible to cold stress and other abiotic stresses, especially in the marginal northern tropics. Recent years, the genome sequencing and RNA-seq projects produced huge amount of sequence data, which greatly facilitated the functional genomics study. However, the characterization of individual functional gene is in urgent demands, especially for those involved in stress resistance...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27895202/the-lbd12-1-transcription-factor-suppresses-apical-meristem-size-by-repressing-argonaute-10-expression
#2
Weiwei Ma, Fuqing Wu, Peike Sheng, Xiaole Wang, Zhe Zhang, Kunneng Zhou, Huan Zhang, Jinlong Hu, Qibing Lin, Zhijun Cheng, Jiulin Wang, Shanshan Zhu, Xin Zhang, Xiuping Guo, Haiyang Wang, Chuanyin Wu, Jianmin Wan
The shoot apical meristem (SAM) consists of a population of multipotent cells that generate all aerial structures and regenerates itself. SAM maintenance and lateral organ development are regulated by several complex signaling pathways, in which the Argonaute gene mediated pathway plays a key role. One Argonaute gene, AGO10, functions as a miRNA locker that attenuates miR165/166 activity and positively regulates shoot apical meristem development, but little is known about when and how AGO10 is regulated at the transcriptional level...
November 28, 2016: Plant Physiology
https://www.readbyqxmd.com/read/27872633/a-factor-linking-floral-organ-identity-and-growth-revealed-by-characterization-of-the-tomato-mutant-unfinished-flower-development-ufd
#3
Sandra Poyatos-Pertíñez, Muriel Quinet, Ana Ortíz-Atienza, Fernando J Yuste-Lisbona, Clara Pons, Estela Giménez, Trinidad Angosto, Antonio Granell, Juan Capel, Rafael Lozano
Floral organogenesis requires coordinated interactions between genes specifying floral organ identity and those regulating growth and size of developing floral organs. With the aim to isolate regulatory genes linking both developmental processes (i.e., floral organ identity and growth) in the tomato model species, a novel mutant altered in the formation of floral organs was further characterized. Under normal growth conditions, floral organ primordia of mutant plants were correctly initiated, however, they were unable to complete their development impeding the formation of mature and fertile flowers...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27857718/variance-genetic-control-and-spatial-phenotypic-plasticity-of-morphological-and-phenological-traits-in-prunus-spinosa-and-its-large-fruited-forms-p-x-fruticans
#4
Kristine Vander Mijnsbrugge, Arion Turcsán, Leander Depypere, Marijke Steenackers
Prunus spinosa is a highly esteemed shrub in forest and landscape plantings. Shrubs with larger organs occur often and are considered either as large fruited forms of P. spinosa or as P. x fruticans, involving a hybridization process with the ancient cultivated P. insititia (crop-to-wild gene flow). As climate change may augment hybridization processes in the future, a hybrid origin is important to detect. In addition, studying crop-to-wild gene flow can give insights in putative consequences for the wild populations...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27849572/standing-genetic-variation-in-a-tissue-specific-enhancer-underlies-selfing-syndrome-evolution-in-capsella
#5
Adrien Sicard, Christian Kappel, Young Wha Lee, Natalia Joanna Woźniak, Cindy Marona, John R Stinchcombe, Stephen I Wright, Michael Lenhard
Mating system shifts recurrently drive specific changes in organ dimensions. The shift in mating system from out-breeding to selfing is one of the most frequent evolutionary transitions in flowering plants and is often associated with an organ-specific reduction in flower size. However, the evolutionary paths along which polygenic traits, such as size, evolve are poorly understood. In particular, it is unclear how natural selection can specifically modulate the size of one organ despite the pleiotropic action of most known growth regulators...
November 29, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27843751/assembly-and-analysis-of-the-complete-salix-purpurea-l-salicaceae-mitochondrial-genome-sequence
#6
Suyun Wei, Xuelin Wang, Changwei Bi, Yiqing Xu, Dongyang Wu, Ning Ye
Plant mitochondrial (mt) genomes possess several complex features, including a variable size, a dynamic genome structure, and complicated patterns of gene loss and gain throughout evolutionary history. Studies of plant mt genomes can, therefore, provide unique insights into organelle evolution. We assembled the complete Salix purpurea L. mt genome by screening genomic sequence reads generated by a Roche-454 pyrosequencing platform. The pseudo-molecule obtained has a typical circular structure 598,970 bp long, with an overall GC content of 55...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27833829/de-novo-transcriptome-sequencing-and-comparative-analysis-to-discover-genes-related-to-floral-development-in-cymbidium-faberi-rolfe
#7
Yuying Sun, Guangdong Wang, Yuxia Li, Li Jiang, Yuxia Yang, Shuangxue Guan
Cymbidium faberi is a traditional orchid flower in China that is highly appreciated for its fragrant aroma from its zygomorphic flowers. One bottleneck of the commercial production of C. faberi is the long vegetative growth phase of the orchid and the difficulty of the regulation of its flowering time. Moreover, its flower size, shape and color are often targeting traits for orchid breeders. Understanding the molecular mechanisms of floral development in C. faberi will ultimately benefit the genetic improvement of this orchid plant...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27811080/fie-a-nuclear-prc2-protein-forms-cytoplasmic-complexes-in-arabidopsis-thaliana
#8
Moran Oliva, Yana Butenko, Tzung-Fu Hsieh, Ofir Hakim, Aviva Katz, Nechama I Smorodinsky, Daphna Michaeli, Robert L Fischer, Nir Ohad
Polycomb group (PcG) proteins are evolutionarily conserved chromatin modifiers that regulate developmental pathways in plants. PcGs form nuclear multi-subunit Polycomb Repressive Complexes (PRCs). The PRC2 complex mediates gene repression via methylation of lysine 27 on histone H3, which consequently leads to chromatin condensation. In Arabidopsis thaliana, several PRC2 complexes with different compositions were identified, each controlling a particular developmental program.The core subunit FIE is crucial for PRC2 function throughout the plant life cycle, yet accurate information on its spatial and temporal localization was absent...
November 2016: Journal of Experimental Botany
https://www.readbyqxmd.com/read/27808238/mitochondrial-genomes-and-comparative-genomics-of-aphanomyces-astaci-and-aphanomyces-invadans
#9
Jenny Makkonen, Arto Vesterbacka, Frank Martin, Japo Jussila, Javier Diéguez-Uribeondo, Raine Kortet, Harri Kokko
The genus Aphanomyces (Saprolegniales, Oomycetes) includes species with a variety of ecologies from saprotrophs to plant and animal parasites. Two important species in this genus are A. astaci, the cause of crayfish plague and its close relative, A. invadans, which causes the epizootic ulcerative syndrome on fish. In this study, we have assembled and annotated the mitochondrial (mt) genomes of A. astaci and A. invadans from the whole genome shotgun sequence reads (PRJNA187372; PRJNA258292, respectively). The assembly was generated from A...
November 3, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27791139/increasing-seed-size-and-quality-by-manipulating-big-seeds1-in-legume-species
#10
Liangfa Ge, Jianbin Yu, Hongliang Wang, Diane Luth, Guihua Bai, Kan Wang, Rujin Chen
Plant organs, such as seeds, are primary sources of food for both humans and animals. Seed size is one of the major agronomic traits that have been selected in crop plants during their domestication. Legume seeds are a major source of dietary proteins and oils. Here, we report a conserved role for the BIG SEEDS1 (BS1) gene in the control of seed size and weight in the model legume Medicago truncatula and the grain legume soybean (Glycine max). BS1 encodes a plant-specific transcription regulator and plays a key role in the control of the size of plant organs, including seeds, seed pods, and leaves, through a regulatory module that targets primary cell proliferation...
October 17, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27790228/comparative-transcriptome-and-chloroplast-genome-analyses-of-two-related-dipteronia-species
#11
Tao Zhou, Chen Chen, Yue Wei, Yongxia Chang, Guoqing Bai, Zhonghu Li, Nazish Kanwal, Guifang Zhao
Dipteronia (order Sapindales) is an endangered genus endemic to China and has two living species, D.sinensis and D. dyeriana. The plants are closely related to the genus Acer, which is also classified in the order Sapindales. Evolutionary studies on Dipteronia have been hindered by the paucity of information on their genomes and plastids. Here, we used next generation sequencing to characterize the transcriptomes and complete chloroplast genomes of both Dipteronia species. A comparison of the transcriptomes of both species identified a total of 7814 orthologs...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27777577/moving-through-the-stressed-genome-emerging-regulatory-roles-for-transposons-in-plant-stress-response
#12
Pooja Negi, Archana N Rai, Penna Suprasanna
The recognition of a positive correlation between organism genome size with its transposable element (TE) content, represents a key discovery of the field of genome biology. Considerable evidence accumulated since then suggests the involvement of TEs in genome structure, evolution and function. The global genome reorganization brought about by transposon activity might play an adaptive/regulatory role in the host response to environmental challenges, reminiscent of McClintock's original 'Controlling Element' hypothesis...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27764161/polycomb-protein-osfie2-affects-plant-height-and-grain-yield-in-rice
#13
Xianbo Liu, Xiangjin Wei, Zhonghua Sheng, Guiai Jiao, Shaoqing Tang, Ju Luo, Peisong Hu
Polycomb group (PcG) proteins have been shown to affect growth and development in plants. To further elucidate their role in these processes in rice, we isolated and characterized a rice mutant which exhibits dwarfism, reduced seed setting rate, defective floral organ, and small grains. Map-based cloning revealed that abnormal phenotypes were attributed to a mutation of the Fertilization Independent Endosperm 2 (OsFIE2) protein, which belongs to the PcG protein family. So we named the mutant as osfie2-1. Histological analysis revealed that the number of longitudinal cells in the internodes decreased in osfie2-1, and that lateral cell layer of the internodes was markedly thinner than wild-type...
2016: PloS One
https://www.readbyqxmd.com/read/27729435/recurrence-of-chromosome-rearrangements-and-reuse-of-dna-breakpoints-in-the-evolution-of-the-triticeae-genomes
#14
Wanlong Li, Ghana S Challa, Huilan Zhu, Wenjie Wei
Chromosomal rearrangements (CRs) play important roles in karyotype diversity and speciation. While many CR breakpoints have been characterized at the sequence level in yeast, insects and primates, little is known about the structure of evolutionary CR breakpoints in plant genomes, which are much more dynamic in genome size and sequence organization. Here, we report identification of breakpoints of a translocation between chromosome arms 4L and 5L of Triticeae, which is fixed in several species including diploid wheat and rye, by comparative mapping and comparative analysis of the draft genome and chromosome survey sequences of the Triticeae species...
October 11, 2016: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/27717457/the-agrobacterium-rhizogenes-oncogenes-rolb-and-orf13-increase-formation-of-generative-shoots-and-induce-dwarfism-in-arabidopsis-thaliana-l-heynh
#15
Nete Kodahl, Renate Müller, Henrik Lütken
Plant transformation with the wild type Ri plasmid T-DNA of Agrobacterium rhizogenes is a promising method for breeding of compact plants and has been the subject of numerous studies. However, knowledge concerning the isolated functions of single genes and ORFs from the plasmid is limited. The rolB and ORF13 oncogenes of A. rhizogenes show considerable promise in plant breeding, but have not been comprehensively studied. Detailed information regarding the morphological impact of specific genes of the Ri plasmid will allow for optimized targeted breeding of plants transformed with the wild type Ri plasmid T-DNA...
November 2016: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/27698253/a-legume-tor-protein-kinase-is-essential-for-infection-nodule-development-and-rhizobium-symbiosis
#16
Kalpana Nanjareddy, Lourdes Blanco, Manoj Kumar Arthikala, Xochitl Alvarado-Affantranger, Carmen Quinto, Federico Sanchez, Miguel Lara
The target of rapamycin (TOR) protein kinase regulates metabolism, growth and life span in yeast, animals and plants in coordination with nutrient status and environmental conditions. The nutrient-dependent nature of TOR functionality makes this kinase a putative regulator of symbiotic associations involving nutrient acquisition. However, TOR's role in these processes remains to be understood. Here, we uncovered the role of TOR during the Phaseolus vulgaris-Rhizobium symbiotic interaction. TOR was expressed in all tested Phaseolus tissues, with higher expression levels in the root meristems and senesced nodules...
October 3, 2016: Plant Physiology
https://www.readbyqxmd.com/read/27690110/genome-wide-identification-characterization-and-expression-profiling-of-adf-family-genes-in-solanum-lycopersicum-l
#17
Khadiza Khatun, Arif Hasan Khan Robin, Jong-In Park, Chang Kil Kim, Ki-Byung Lim, Min-Bae Kim, Do-Jin Lee, Ill Sup Nou, Mi-Young Chung
The actin depolymerizing factor (ADF) proteins have growth, development, defense-related and growth regulatory functions in plants. The present study used genome-wide analysis to investigate ADF family genes in tomato. Eleven tomato ADF genes were identified and differential expression patterns were found in different organs. SlADF6 was preferentially expressed in roots, suggesting its function in root development. SlADF1, SlADF3 and SlADF10 were predominately expressed in the flowers compared to the other organs and specifically in the stamen compared to other flower parts, indicating their potential roles in pollen development...
2016: Genes
https://www.readbyqxmd.com/read/27677843/carbon-assimilation-in-eucalyptus-urophylla-grown-under-high-atmospheric-co2-concentrations-a-proteomics-perspective
#18
Bruna Marques Dos Santos, Tiago Santana Balbuena
: Photosynthetic organisms may be drastically affected by the future climate projections of a considerable increase in CO2 concentrations. Growth under a high concentration of CO2 could stimulate carbon assimilation-especially in C3-type plants. We used a proteomics approach to test the hypothesis of an increase in the abundance of the enzymes involved in carbon assimilation in Eucalyptus urophylla plants grown under conditions of high atmospheric CO2. Our strategy allowed the profiling of all Calvin-Benson cycle enzymes and associated protein species...
September 24, 2016: Journal of Proteomics
https://www.readbyqxmd.com/read/27605715/%C3%AE-xylosidase-plays-essential-roles-in-xyloglucan-remodelling-maintenance-of-cell-wall-integrity-and-seed-germination-in-arabidopsis-thaliana
#19
Takuma Shigeyama, Asuka Watanabe, Konatsu Tokuchi, Shigeo Toh, Naoki Sakurai, Naoto Shibuya, Naoto Kawakami
Regulation and maintenance of cell wall physical properties are crucial for plant growth and environmental response. In the germination process, hypocotyl cell expansion and endosperm weakening are prerequisites for dicot seeds to complete germination. We have identified the Arabidopsis mutant thermoinhibition-resistant germination 1 (trg1), which has reduced seed dormancy and insensitivity to unfavourable conditions for germination owing to a loss-of-function mutation of TRG1/XYL1, which encodes an α-xylosidase...
October 2016: Journal of Experimental Botany
https://www.readbyqxmd.com/read/27605130/genome-wide-identification-of-tcp-family-transcription-factors-from-populus-euphratica-and-their-involvement-in-leaf-shape-regulation
#20
Xiaodong Ma, Jianchao Ma, Di Fan, Chaofeng Li, Yuanzhong Jiang, Keming Luo
Higher plants have been shown to experience a juvenile vegetative phase, an adult vegetative phase, and a reproductive phase during its postembryonic development and distinct lateral organ morphologies have been observed at the different development stages. Populus euphratica, commonly known as a desert poplar, has developed heteromorphic leaves during its development. The TCP family genes encode a group of plant-specific transcription factors involved in several aspects of plant development. In particular, TCPs have been shown to influence leaf size and shape in many herbaceous plants...
2016: Scientific Reports
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