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Plant phenotyping

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https://www.readbyqxmd.com/read/28346710/the-arabidopsis-thiamin-deficient-mutant-pale-green1-lacks-thiamin-monophosphate-phosphatase-of-the-vitamin-b1-biosynthesis-pathway
#1
Wei-Yu Hsieh, Jo-Chien Liao, Hsin-Tzu Wang, Tzu-Huan Hung, Ching-Chih Tseng, Tsui-Yun Chung, Ming-Hsiun Hsieh
Thiamin diphosphate (TPP, vitamin B1) is an essential coenzyme present in all organisms. Animals obtain TPP from their diets, but plants synthesize TPP de novo. We isolated and characterized an Arabidopsis pale green1 (pale1) mutant that contained higher concentrations of thiamin monophosphate (TMP) and less thiamin and TPP than the wild type. Supplementation with thiamin, but not the thiazole and pyrimidine precursors, rescued the mutant phenotype, indicating that the pale1 mutant is a thiamin-deficient mutant...
March 27, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28344649/overexpression-of-a-domain-of-unknown-function-266-containing-protein-results-in-high-cellulose-content-reduced-recalcitrance-and-enhanced-plant-growth-in-the-bioenergy-crop-populus
#2
Yongil Yang, Chang Geun Yoo, Hao-Bo Guo, William Rottmann, Kimberly A Winkeler, Cassandra M Collins, Lee E Gunter, Sara S Jawdy, Xiaohan Yang, Hong Guo, Yunqiao Pu, Arthur J Ragauskas, Gerald A Tuskan, Jin-Gui Chen
BACKGROUND: Domain of Unknown Function 266 (DUF266) is a plant-specific domain. DUF266-containing proteins (DUF266 proteins) have been categorized as 'not classified glycosyltransferases (GTnc)' due to amino acid similarity with GTs. However, little is known about the function of DUF266 proteins. RESULTS: Phylogenetic analysis revealed that DUF266 proteins are only present in the land plants including moss and lycophyte. We report the functional characterization of one member of DUF266 proteins in Populus, PdDUF266A...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28344637/growth-curve-registration-for-evaluating-salinity-tolerance-in-barley
#3
Rui Meng, Stephanie Saade, Sebastian Kurtek, Bettina Berger, Chris Brien, Klaus Pillen, Mark Tester, Ying Sun
BACKGROUND: Smarthouses capable of non-destructive, high-throughput plant phenotyping collect large amounts of data that can be used to understand plant growth and productivity in extreme environments. The challenge is to apply the statistical tool that best analyzes the data to study plant traits, such as salinity tolerance, or plant-growth-related traits. RESULTS: We derive family-wise salinity sensitivity (FSS) growth curves and use registration techniques to summarize growth patterns of HEB-25 barley families and the commercial variety, Navigator...
2017: Plant Methods
https://www.readbyqxmd.com/read/28344588/atlsg1-2-regulates-leaf-growth-by-affecting-cell-proliferation-and-the-onset-of-endoreduplication-and-synergistically-interacts-with-atnmd3-during-cell-proliferation-process
#4
Huayan Zhao, Shiyou Lü, Liming Xiong
AtLSG1-2 is a circularly permuted GTPase required for ribosome biogenesis and recently shown to be involved in early leaf development, although it was unclear how AtLSG1-2 affects leaf growth. Here, we found that atlsg1-2 mutants had reduced leaf size as a result of decreased cell size and cell number. Leaf kinematic analysis and CYCB1;1::GUS expression pattern in atlsg1-2 mutant indicated that loss of function of AtLSG1-2 delays the transition from cell division to cell expansion. Decreases in ploidy levels and trichome branch number suggest that AtLSG1-2 deficiency suppresses endoreduplication...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28343247/development-of-a-qtl-environment-based-predictive-model-for-node-addition-rate-in-common-bean
#5
Li Zhang, Salvador A Gezan, C Eduardo Vallejos, James W Jones, Kenneth J Boote, Jose A Clavijo-Michelangeli, Mehul Bhakta, Juan M Osorno, Idupulapati Rao, Stephen Beebe, Elvin Roman-Paoli, Abiezer Gonzalez, James Beaver, Jaumer Ricaurte, Raphael Colbert, Melanie J Correll
This work reports the effects of the genetic makeup, the environment and the genotype by environment interactions for node addition rate in an RIL population of common bean. This information was used to build a predictive model for node addition rate. To select a plant genotype that will thrive in targeted environments it is critical to understand the genotype by environment interaction (GEI). In this study, multi-environment QTL analysis was used to characterize node addition rate (NAR, node day(- 1)) on the main stem of the common bean (Phaseolus vulgaris L)...
March 25, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/28342018/overexpression-of-osgata12-regulates-chlorophyll-content-delays-plant-senescence-and-improves-rice-yield-under-high-density-planting
#6
Guangwen Lu, José A Casaretto, Shan Ying, Kashif Mahmood, Fang Liu, Yong-Mei Bi, Steven J Rothstein
Agronomic traits controlling the formation, architecture and physiology of source and sink organs are main determinants of rice productivity. Semi-dwarf rice varieties with low tiller formation but high seed production per panicle and dark green and thick leaves with prolonged source activity are among the desirable traits to further increase the yield potential of rice. Here, we report the functional characterization of a zinc finger transcription factor, OsGATA12, whose overexpression causes increased leaf greenness, reduction of leaf and tiller number, and affects yield parameters...
March 24, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28341626/phenotypic-effects-of-allotetraploidization-of-wild-arachis-and-their-implications-for-peanut-domestication
#7
Soraya C M Leal-Bertioli, Márcio C Moretzsohn, Silvio P Santos, Ana C M Brasileiro, Patrícia M Guimarães, David J Bertioli, Ana Claudia G Araujo
PREMISE OF THE STUDY: Several species of Arachis have been cultivated for their edible seeds, historically and to the present day. The diploid species that have a history of cultivation show relatively small signatures of domestication. In contrast, the tetraploid species A. hypogaea evolved into highly domesticated forms and became a major world crop, the cultivated peanut. It seems likely that allotetraploidization (hybridity and/or tetraploidization) in some way enhanced attractiveness for cultivation...
March 24, 2017: American Journal of Botany
https://www.readbyqxmd.com/read/28340621/antibacterial-and-antibiotic-resistance-modulatory-activities-of-leaves-and-bark-extracts-of-recinodindron-heudelotii-euphorbiaceae-against-multidrug-resistant-gram-negative-bacteria
#8
Aimé Gabriel Fankam, Jules-Roger Kuiate, Victor Kuete
BACKGROUND: Recinodindron heudelotii (Euphorbiaceae) is a plant used in Africa, particularly in Cameroon to treat various ailments including bacterial infections. In this study, we evaluated the extracts of the leaves (RHL) and bark (RHB) of R. heudelotii for their antibacterial and antibiotic resistance modulating activities against 29 Gram-negative bacteria, including multidrug-resistant (MDR) phenotypes. METHODS: The broth micro-dilution assay was used to evaluate the antibacterial activity, and the antibiotic resistance modulating effects of the plant extracts...
March 24, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28340278/path-analysis-and-canonical-correlations-for-indirect-selection-of-jatropha-genotypes-with-higher-oil-yield
#9
L A Silva, L A Peixoto, P E Teodoro, E V Rodrigues, B G Laviola, L L Bhering
Jatropha is a species with great potential for biodiesel production, and the knowledge on how the main agronomic traits are correlated will contribute to its improvement. Therefore, the objectives of this study were to estimate the genetic parameters of the traits: plant height at 12 and 40 months, canopy projection on the row at 12 and 40 months, canopy projection between the row at 12 and 40 months, number of branches at 40 months, grain yield, and oil yield; to verify the existence of phenotypic correlation between these traits; to verify the influence of the morphological traits on oil yield by means of path analysis; and to evaluate the relationship between the productive traits in Jatropha and the morphological traits measured at different ages...
March 22, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28339719/the-pepper-wpp-domain-protein-cawdp1-acts-as-a-novel-negative-regulator-of-drought-stress-via-aba-signaling
#10
Chanmi Park, Chae Woo Lim, Woonhee Baek, Jung-Hyun Kim, Sohee Lim, Sang Hyon Kim, Kyung-Nam Kim, Sung Chul Lee
Plants are constantly challenged by various environmental stresses, including high salinity and drought, and they have evolved defense mechanisms to counteract the deleterious effects of these stresses. The plant hormone abscisic acid (ABA) regulates plant growth and developmental processes and mediates abiotic stress responses. Here, we report the identification and characterization of a novel CaWDP1 (Capsicum annuumWPP Domain Protein 1) protein. The expression of CaWDP1 in pepper leaves was induced by ABA, drought, and NaCl treatments, suggesting its role in the abiotic stress response...
February 22, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28339550/the-tension-sensitive-ion-transport-activity-of-msl8-is-critical-for-its-function-in-pollen-hydration-and-germination
#11
Eric S Hamilton, Elizabeth S Haswell
All cells respond to osmotic challenges, including those imposed during normal growth and development. Mechanosensitive (MS) ion channels provide a conserved mechanism for regulating osmotic forces by conducting ions in response to increased membrane tension. We previously demonstrated that the MS ion channel MscS-Like 8 (MSL8) is required for pollen to survive multiple osmotic challenges that occur during the normal process of fertilization, and that it can inhibit pollen germination. However, it remained unclear whether these physiological functions required ion flux through a mechanically gated channel provided by MSL8...
January 10, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28338805/deciphering-the-genetic-control-of-fruit-texture-in-apple-by-multiple-family-based-analysis-and-genome-wide-association
#12
Mario Di Guardo, Marco C A M Bink, Walter Guerra, Thomas Letschka, Lidia Lozano, Nicola Busatto, Lara Poles, Alice Tadiello, Luca Bianco, Richard G F Visser, Eric van de Weg, Fabrizio Costa
Fruit texture is a complex feature composed of mechanical and acoustic properties relying on the modifications occurring in the cell wall throughout fruit development and ripening. Apple is characterized by a large variation in fruit texture behavior that directly impacts both the consumer's appreciation and post-harvest performance. To decipher the genetic control of fruit texture comprehensively, two complementing quantitative trait locus (QTL) mapping approaches were employed. The first was represented by a pedigree-based analysis (PBA) carried out on six full-sib pedigreed families, while the second was a genome-wide association study (GWAS) performed on a collection of 233 apple accessions...
February 24, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28338733/genetic-adaptation-and-phenotypic-plasticity-contribute-to-greater-leaf-hydraulic-tolerance-in-response-to-drought-in-warmer-climates
#13
Chris J Blackman, Michael J Aspinwall, David T Tissue, Paul D Rymer
The ability of plants to maintain an intact water transport system in leaves under drought conditions is intimately linked to survival and can been be seen as adaptive in shaping species climatic limits. Large differences in leaf hydraulic vulnerability to drought are known among species from contrasting climates, yet whether this trait varies among populations within a single species and, furthermore, whether it is altered by changes in growth conditions, remain unclear. We examined intraspecific variation in both leaf water transport capacity (Kleaf) and leaf hydraulic vulnerability to drought (P50leaf) among eight populations of Corymbia calophylla (R...
February 9, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28338729/revealing-the-roles-of-gork-channels-and-nadph-oxidase-in-acclimation-to-hypoxia-in-arabidopsis
#14
Feifei Wang, Zhong-Hua Chen, Xiaohui Liu, Timothy D Colmer, Lana Shabala, Anya Salih, Meixue Zhou, Sergey Shabala
Regulation of root cell K+ is essential for acclimation to low oxygen stress. The potential roles of GORK (depolarization-activated guard cell outward-rectifying potassium) channels and RBOHD (respiratory burst oxidase homologue D) in plant adaptive responses to hypoxia were investigated in the context of tissue specificity (epidermis versus stele; elongation versus mature zone) in roots of Arabidopsis. The expression of GORK and RBOHD was down-regulated by 2- to 3-fold within 1 h and 24 h of hypoxia treatment in Arabidopsis wild-type (WT) roots...
October 19, 2016: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28338719/the-legume-mir1514a-modulates-a-nac-transcription-factor-transcript-to-trigger-phasirna-formation-in-response-to-drought
#15
Guadalupe Sosa-Valencia, Miguel Palomar, Alejandra A Covarrubias, José L Reyes
Recent studies have identified microRNAs as post-transcriptional regulators involved in stress responses. miR1514a is a legume microRNA that is induced in response to drought stress in Phaseolus vulgaris (common bean) and shows differential accumulation levels in roots during water deficit in two cultivars with different drought tolerance phenotypes. A recent degradome analysis revealed that miR1514a targets the transcripts of two NAC transcription factors (TFs), Phvul.010g121000 and Phvul.010g120700. Furthermore, expression studies and small RNA-seq data indicate that only Phvul...
October 7, 2016: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28338020/epigenetic-regulation-of-intronic-transgenes-in-arabidopsis
#16
Kenji Osabe, Yoshiko Harukawa, Saori Miura, Hidetoshi Saze
Defense mechanisms of plant genomes can epigenetically inactivate repetitive sequences and exogenous transgenes. Loss of mutant phenotypes in intronic T-DNA insertion lines by interaction with another T-DNA locus, termed T-DNA suppression, has been observed in Arabidopsis thaliana, although the molecular basis of establishment and maintenance of T-DNA suppression is poorly understood. Here we show that maintenance of T-DNA suppression requires heterochromatinisation of T-DNA sequences and the nuclear proteins, INCREASED IN BONSAI METHYLATION 2 (IBM2) and ENHANCED DOWNY MILDEW 2 (EDM2), which prevent ectopic 3' end processing of mRNA in atypically long introns containing T-DNA sequences...
March 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28337836/plant-transcription-factors-from-the-homeodomain-leucine-zipper-family-i-role-in-development-and-stress-responses
#17
REVIEW
María Florencia Perotti, Pamela Anahí Ribone, Raquel Lía Chan
In front of stressful conditions plants display adaptation mechanisms leading to changes in their morphology, physiology, development and molecular composition. Transcription factors (TFs) play crucial roles in these complex adaptation processes. This work is focused in the homeodomain-leucine zipper I (HD-Zip I) family of TFs, unique to plants. First discovered in 1991, they were identified and isolated from monocotyledonous and dicotyledonous plants showing high structural similarity and diversified functions...
March 24, 2017: IUBMB Life
https://www.readbyqxmd.com/read/28337773/histone-h2b-monoubiquitination-regulates-salt-stress-induced-microtubule-depolymerization-in-arabidopsis
#18
Sa Zhou, Qiuhong Chen, Yuhui Sun, Yingzhang Li
Histone H2B monoubiquitination (H2Bub1) is recognized as a regulatory mechanism that controls a range of cellular processes. We previously showed that H2Bub1 was involved in responses to biotic stress in Arabidopsis. However, the molecular regulatory mechanisms of H2Bub1 in controlling responses to abiotic stress remain limited. Here, we report that HISTONE MONOUBIQUITINATION1 (HUB1) and HUB2 played important regulatory roles in response to salt stress. Phenotypic analysis revealed that H2Bub1 mutants confer decreased tolerance to salt stress...
March 24, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28337762/molecular-interaction-between-pho2-and-gi-in-rice
#19
Shuai Li, Yinghui Ying, David Secco, Chuang Wang, Reena Narsai, James Whelan, Huixia Shou
Plants are often confronted to nutrient limiting conditions, such as inorganic phosphate (Pi) deficiency, resulting in a reduction in growth and yield. PHO2, encoding a ubiquitin-conjugating E2 enzyme, is a central component of the Pi-starvation response signaling pathway. A yeast-two-hybrid screen using Oryza sativa (rice) PHO2 as bait, revealed an interaction between OsPHO2 and OsGIGANTEA, a key regulator of flowering time, which was confirmed using bimolecular flourescenec complementation (BiFC). Characterization of rice Osgi and Ospho2 mutants revealed that they displayed several similar phenotypic features supporting a physiological role for this interaction...
March 24, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28337177/diversity-and-abundance-of-ice-nucleating-strains-of-pseudomonas-syringae-in-a-freshwater-lake-in-virginia-usa
#20
Renée B Pietsch, Boris A Vinatzer, David G Schmale
The bacterium Pseudomonas syringae is found in a variety of terrestrial and aquatic environments. Some strains of P. syringae express an ice nucleation protein (hereafter referred to as Ice+) allowing them to catalyze the heterogeneous freezing of water. Though P. syringae has been sampled intensively from freshwater sources in France, little is known about the genetic diversity of P. syringae in natural aquatic habitats in North America. We collected samples of freshwater from three different depths in Claytor Lake, Virginia, USA between November 2015 and June 2016...
2017: Frontiers in Microbiology
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