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https://www.readbyqxmd.com/read/28432907/assessment-of-field-re-entry-exposure-to-pesticides-a-dislodgeable-foliar-residue-study
#1
Konstantinos M Kasiotis, Angelos N Tsakirakis, C Richard Glass, Agathi N Charistou, Pelagia Anastassiadou, Rianda Gerritsen-Ebben, Kyriaki Machera
A dislodgeable foliar residue study was conducted in greenhouse pepper and tomato on the island of Crete, Greece, following the spray application of an SC insecticide (with active substance (a.s.) tebufenozide) and an EC fungicide (a.s. bupirimate). Furthermore, for the assessment of worker exposure to pesticides - as a result of re-entering the treated crops - a worker dermal exposure study was carried out during the tasks of tying or pruning, which allowed the transfer coefficient values for the specific tasks to be determined...
April 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28432096/interaction-between-dapg-and-hcn-producing-pseudomonas-brassicacearum-lbum300-and-clavibacter-michiganensis-subsp-michiganensis-in-the-rhizosphere-of-tomato
#2
Mélanie M Paulin, Amy Novinscak, Carine Lanteigne, Vijay J Gadkar, Martin Filion
We have previously demonstrated that inoculation of tomato plants with 2,4-diacetylphloroglucinol (DAPG) and hydrogen cyanide (HCN) producing Pseudomonas brassicacearum LBUM300 could significantly reduce bacterial canker symptoms caused by Clavibacter michiganensis subsp. michiganensis (Cmm). In this study, in order to better characterize the population dynamics of LBUM300 in the rhizosphere of tomato plants, we characterized the role played by DAPG and HCN production by LBUM300 on rhizosphere colonization of healthy and Cmm-infected tomato plants...
April 21, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28431513/functional-characterization-of-cucumber-cucumis-sativus-l-clade-v-mlo-genes
#3
Jeroen A Berg, Michela Appiano, Gerard Bijsterbosch, Richard G F Visser, Henk J Schouten, Yuling Bai
BACKGROUND: Powdery mildew (PM) causing fungi are well-known pathogens, infecting over 10.000 plant species, including the economically important crop cucumber (Cucumis sativus L.). Loss-of-function mutations in clade V MLO genes have previously been shown to lead to recessively inherited broad-spectrum resistance to PM in several species. In cucumber, one clade V MLO homolog (CsaMLO8) was previously identified as being a susceptibility factor to PM. Two other closely related homologs (CsaMLO1 and CsaMLO11) were found, but their function was not yet unravelled...
April 21, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28430084/the-spo0a-sini-sinr-regulatory-circuit-plays-an-essential-role-in-biofilm-formation-nematicidal-activities-and-plant-protection-in-bacillus-cereus-ar156
#4
Sunde Xu, Nan Yang, Shiyu Zheng, Fang Yan, Chunhao Jiang, Yiyang Yu, Jianhua Guo, Yunrong Chai, Yun Chen
The rhizosphere bacterium Bacillus cereus AR156 is capable of forming biofilms, killing nematodes, and protecting plants. However, the underlying molecular mechanisms of these processes are not well understood. In this study, we found that the isogenic mutants ΔBcspo0A and ΔBcsinI have significantly reduced colonization and nematicidal activity in vitro and biological control efficacy on the tomato plant under greenhouse conditions. We further investigated the role of the spo0A-sinI-sinR regulatory circuit in biofilm formation, killing against nematodes, and biological control in AR156...
April 21, 2017: Molecular Plant-microbe Interactions: MPMI
https://www.readbyqxmd.com/read/28428834/genome-sequencing-and-analysis-of-ralstonia-solanacearum-phylotype-i-strains-fjat-91-fjat-452-and-fjat-462-isolated-from-tomato-eggplant-and-chili-pepper-in-china
#5
Yidan Sun, Keke Wang, Carlos Caceres-Moreno, Wei Jia, Aojun Chen, Heng Zhang, Renyi Liu, Alberto P Macho
Ralstonia solanacearum is an extremely destructive pathogen able to cause disease in a wide range of host plants. Here we report the draft genome sequences of the strains FJAT-91, FJAT-452 and FJAT-462, isolated from tomato, eggplant, and chili pepper, respectively, in China. In addition to the genome annotation, we performed a search for type-III secreted effectors in these strains, providing a detailed annotation of their presence and distinctive features compared to the effector repertoire of the reference phylotype I strain (GMI1000)...
2017: Standards in Genomic Sciences
https://www.readbyqxmd.com/read/28428141/temporal-impact-of-the-vascular-wilt-pathogen-verticillium-dahliae-on-tomato-root-proteome
#6
Katja Witzel, Anja Buhtz, Rita Grosch
The soil-borne fungus Verticillium dahliae is the causal agent of wilting disease and affects a wide range of plant species worldwide. Here, we report on the time-resolved analysis of the tomato root proteome in response to fungal colonization. Tomato (Solanum lycopersicum cv. Hildares) was inoculated with V. dahliae at the two-leaf stage and roots were harvested at 7, 14 and 21 days post inoculation (dpi). In order to identify proteins related to the fungal spread at the different time points, a subsequent proteome analysis by two-dimensional differential gel electrophoresis (2D-DIGE) was conducted on samples from three independent experiments...
April 17, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28427341/reactive-oxygen-species-mediate-tapetal-programmed-cell-death-in-tobacco-and-tomato
#7
Shi-Xia Yu, Qiang-Nan Feng, Hong-Tao Xie, Sha Li, Yan Zhang
BACKGROUND: Hybrid vigor is highly valued in the agricultural industry. Male sterility is an important trait for crop breeding. Pollen development is under strict control of both gametophytic and sporophytic factors, and defects in this process can result in male sterility. Both in the dicot Arabidopsis and in the moncot rice, proper timing of programmed cell death (PCD) in the tapetum ensures pollen development. Dynamic ROS levels have been reported to control tapetal PCD, and thus pollen development, in Arabidopsis and rice...
April 20, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28426683/genome-wide-identification-and-characterization-of-mirnaome-from-tomato-solanum-lycopersicum-roots-and-root-knot-nematode-meloidogyne-incognita-during-susceptible-interaction
#8
Pritam Kaur, Neha Shukla, Gopal Joshi, Cheeni VijayaKumar, Arun Jagannath, Manu Agarwal, Shailendra Goel, Amar Kumar
Root-knot nematodes (RKNs, Meloidogyne spp.) are the most damaging plant parasites causing severe losses to crop production. The present study reports genome-wide identification and characterization of both tomato and RKN miRNAs simultaneously from RKN-infected susceptible tomato roots using high-throughput sequencing technique. RNAseq data from 11 small RNA libraries derived from 5 disease development stages identified 281 novel miRNAs of tomato in addition to 52 conserved and 4 variants of conserved miRNAs...
2017: PloS One
https://www.readbyqxmd.com/read/28425570/elongation-of-barley-roots-in-high-ph-nutrient-solution-is-supported-by-both-cell-proliferation-and-differentiation-in-the-root-apex
#9
Kyoko Higuchi, Kota Ono, Satoru Araki, Shogo Nakamura, Tetsuya Uesugi, Taira Makishima, Atsushi Ikari, Takahiro Hanaoka, Masayuki Sue
Many crops grow well on neutral or weakly acidic soils. The ability of roots to elongate under high external pH would be advantageous for the survival of plants on alkaline soil. We found that root elongation was promoted in some plant species in alkaline nutrient solution. Barley, but not tomato, root growth was maintained in pH 8 nutrient solution. Fe and Mn were absorbed well from the pH 8 nutrient solution by both barley and tomato plants, suggesting that the different growth responses of these two species may not be caused by insolubilization of transition metals...
April 20, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28425468/transcriptome-analysis-of-mango-mangifera-indica-l-fruit-epidermal-peel-to-identify-putative-cuticle-associated-genes
#10
Julio C Tafolla-Arellano, Yi Zheng, Honghe Sun, Chen Jiao, Eliel Ruiz-May, Miguel A Hernández-Oñate, Alberto González-León, Reginaldo Báez-Sañudo, Zhangjun Fei, David Domozych, Jocelyn K C Rose, Martín E Tiznado-Hernández
Mango fruit (Mangifera indica L.) are highly perishable and have a limited shelf life, due to postharvest desiccation and senescence, which limits their global distribution. Recent studies of tomato fruit suggest that these traits are influenced by the expression of genes that are associated with cuticle metabolism. However, studies of these phenomena in mango fruit are limited by the lack of genome-scale data. In order to gain insight into the mango cuticle biogenesis and identify putative cuticle-associated genes, we analyzed the transcriptomes of peels from ripe and overripe mango fruit using RNA-Seq...
April 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28424944/indirect-interactions-between-arbuscular-mycorrhizal-fungi-and-spodoptera-exigua-alter-photosynthesis-and-plant-endogenous-hormones
#11
Lei He, Changyou Li, Runjin Liu
Peanut (Arachis hypogaea Linn. cv: Luhua 11) and tomato (Lycopersicon esculentum Mill. cv: Zhongshu 4) were inoculated with arbuscular mycorrhizal fungi (AMF) Funneliformis mosseae BEG167 (Fm), Rhizophagus intraradices BEG141 (Ri), and Glomus versiforme Berch (Gv), and/or Spodoptera exigua (S. exigua) under greenhouse conditions. Results indicated that feeding by S. exigua had little influence on colonization of peanut plants by AMF, but improved colonization of tomato by Fm and Gv. Feeding by S. exigua had little influence on leaf net photosynthetic rate, transpiration rate, and stomatal conductance of nonmycorrhizal peanut plants but significantly improved net photosynthetic rate and transpiration rate of mycorrhizal plants of both hosts...
April 20, 2017: Mycorrhiza
https://www.readbyqxmd.com/read/28424724/soluble-starch-synthase-iii-1-in-amylopectin-metabolism-of-banana-fruit-characterization-expression-enzyme-activity-and-functional-analyses
#12
Hongxia Miao, Peiguang Sun, Qing Liu, Caihong Jia, Juhua Liu, Wei Hu, Zhiqiang Jin, Biyu Xu
Soluble starch synthase (SS) is one of the key enzymes involved in amylopectin biosynthesis in plants. However, no information is currently available about this gene family in the important fruit crop banana. Herein, we characterized the function of MaSSIII-1 in amylopectin metabolism of banana fruit and described the putative role of the other MaSS family members. Firstly, starch granules, starch and amylopectin content were found to increase during banana fruit development, but decline during storage. The SS activity started to increase later than amylopectin and starch content...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28423420/functional-response-of-eretmocerus-delhiensis-on-trialeurodes-vaporariorum-by-parasitism-and-host-feeding
#13
Jafar Ebrahimifar, Arsalan Jamshidnia, Hossein Allahyari
The parasitoid wasp, Eretmocerus delhiensis (Hymenoptera, Aphelinidae) is a thelytokous and syn-ovigenic parasitoid. To evaluate E. delhiensis as a biocontrol agent in greenhouse, the killing efficiency of this parasitoid by parasitism and host-feeding, were studied. Killing efficiency can be compared by estimation of functional response parameters. Laboratory experiments were performed in controllable conditions to evaluate the functional response of E. delhiensis at eight densities (2, 4, 8, 16, 32, 64, 100, and 120 third nymphal stage) of Trialeurodes vaporariorum (Hemiptera, Aleyrodidae) on two hosts including; tomato and prickly lettuce...
January 1, 2017: Journal of Insect Science
https://www.readbyqxmd.com/read/28423344/prolonged-dark-period-modulates-the-oxidative-burst-and-enzymatic-antioxidant-systems-in-the-leaves-of-salicylic-acid-treated-tomato
#14
Péter Poór, Zoltán Takács, Krisztina Bela, Zalán Czékus, Gabriella Szalai, Irma Tari
Salicylic acid (SA) is an important plant growth regulator playing a role in the hypersensitive reaction (HR) and the induction of systemic acquired resistance. Since the SA-mediated signalling pathways and the formation of reactive oxygen species (ROS) are light-dependent, the time- and concentration-specific induction of oxidative stress was investigated in leaves of tomato plants kept under light and dark conditions after treatments with 0.1mM and 1mM SA. The application of exogenous SA induced early superoxide- and H2O2 production in the leaves, which was different in the absence or presence of light and showed time- and concentration-dependent changes...
March 23, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28422413/essential-oils-as-biocides-for-the-control-of-fungal-infections-and-devastating-pest-tuta-absoluta-of-tomato-lycopersicon-esculentum-mill
#15
Samira Bouayad Alam, Mohammed El Amine Dib, Nassim Djabou, Boufeldja Tabti, Nassira Guaouar, Jean Costa, Alain Muselli
Thymus capitatus and Tetraclinis articulata essential oils as well their major components (carvacrol and α-pinene) were evaluated for their antifungal and insecticidal activities. Both oils showed good in vitro antifungal activity against Fusarium oxysporum, Aspergillus niger, Penicillium sp, Alternaria alternata and Botrytis cinerea, the fungi causing tomato rot. In vivo results indicate the efficacies of both essential oils and carvacrol of reduce postharvest fungal pathogens, such as B. cinerea and A. alternata that are responsible of black and gray rot of tomato fruit...
April 19, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/28419833/sexual-selection-sexual-isolation-and-pheromones-in-drosophila-melanogaster-strains-after-long-term-maintaining-on-different-diets
#16
Jelena Trajković, Dragana Miličić, Tatjana Savić, Sofija Pavković-Lučić
Evolution of reproductive isolation may be a consequence of a variety of signals used in courtship and mate preferences. Pheromones play an important role in both sexual selection and sexual isolation. The abundance of pheromones in Drosophila melanogaster may depend on different environmental factors, including diet. The aim of this study was to ascertain to which degree principal pheromones affect sexual selection in D. melanogaster. We used D. melanogaster strains reared for 14 years on four substrates: standard cornmeal substrate and those containing tomato, banana and carrot...
April 15, 2017: Behavioural Processes
https://www.readbyqxmd.com/read/28416212/conversion-of-vegetable-wastes-to-organic-acids-in-leaching-bed-reactor-performance-and-bacterial-community-analysis
#17
Yan Li, Dongliang Hua, Hui Mu, Haipeng Xu, Fuqiang Jin, Xiaodong Zhang
Vegetable wastes (VWs), which contained abundant solid content, were digested in a leaching bed reactor (LBR). The tested VWs for acidification in the LBR included cabbage, potato, and tomato vine. The digestion in the LBR was carried out at the same organic loading rate of 25 g volatile solid (VS) per liter. It was found that cabbage and potato produced much more volatile fatty acids (VFAs) than tomato vine, probably because readily degradable components were more abundant in cabbage and potato. The retention time to digest each feedstock was different...
April 14, 2017: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/28414628/fried-green-tomatoes-and-the-color-purple-a-case-study-in-lesbian-friendship-and-cultural-controversy
#18
Kristen Proehl
Published in the 1980s, Fannie Flagg's Fried Green Tomatoes at the Whistle Stop Café and Alice Walker's The Color Purple are lesbian coming-of-age narratives that share a great deal in common in terms of their thematic content, publication histories, and cultural afterlives. In both novels, female friendships are shaped by patriarchal violence and develop in the context of the rural, segregated, early twentieth-century U.S. South. But the two novels also diverge in significant ways, as differences in race, gender, class, and sexuality shape their protagonists' experiences of love and friendship...
April 17, 2017: Journal of Lesbian Studies
https://www.readbyqxmd.com/read/28413971/structure-of-c-terminal-domain-of-peptidyl-prolyl-cis-trans-isomerase-from-pseudomonas-syringae-pv-tomato-str-dc3000-at-1-6%C3%A3-resolution
#19
Yu Gao, Hong-Mei Zhang, Piwu Wang, Mei Li
Peptidyl-prolyl cis-trans isomerase (PPIase) catalyses the conversion between the cis and trans configurations of proline which switches the backbone conformation of peptides. We determined the crystal structure of the C-terminal domain of PPIase from Pseudomonas syringae pv. tomato DC3000 (PSPTO DC3000) at 1.6Å resolution. Structural comparison of PSPTO-PPIase with its homologues suggested that the successive arrangement of residues with small side-chain in loop 4 contributes to its substrate specificity...
April 13, 2017: Protein and Peptide Letters
https://www.readbyqxmd.com/read/28413433/protoplast-isolation-prior-to-flow-cytometry-reveals-clear-patterns-of-endoreduplication-in-potato-tubers-related-species-and-some-starchy-root-crops
#20
F Parker E Laimbeer, Sarah H Holt, Melissa Makris, Michael Alan Hardigan, C Robin Buell, Richard E Veilleux
BACKGROUND: Endoreduplication, the process of DNA replication in the absence of cell division, is associated with specialized cellular function and increased cell size. Genes controlling endoreduplication in tomato fruit have been shown to affect mature fruit size. An efficient method of estimating endoreduplication is required to study its role in plant organ development. Flow cytometry is often utilized to evaluate endoreduplication, yet some tissues and species, among them the tubers of Solanum tuberosum, remain intractable to routine tissue preparation for flow cytometry...
2017: Plant Methods
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