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https://www.readbyqxmd.com/read/28545114/different-adaptation-strategies-of-two-citrus-scion-rootstock-combinations-in-response-to-drought-stress
#1
Joadson Dutra de Souza, Edson Mario de Andrade Silva, Mauricio Antônio Coelho Filho, Raphaël Morillon, Diego Bonatto, Fabienne Micheli, Abelmon da Silva Gesteira
Scion/rootstock interaction is important for plant development and for breeding programs. In this context, polyploid rootstocks presented several advantages, mainly in relation to biotic and abiotic stresses. Here we analyzed the response to drought of two different scion/rootstock combinations presenting different polyploidy: the diploid (2x) and autotetraploid (4x) Rangpur lime (Citrus limonia, Osbeck) rootstocks grafted with 2x Valencia Delta sweet orange (Citrus sinensis) scions, named V/2xRL and V/4xRL, respectively...
2017: PloS One
https://www.readbyqxmd.com/read/28542200/predicting-cryptic-links-in-host-parasite-networks
#2
Tad Dallas, Andrew W Park, John M Drake
Networks are a way to represent interactions among one (e.g., social networks) or more (e.g., plant-pollinator networks) classes of nodes. The ability to predict likely, but unobserved, interactions has generated a great deal of interest, and is sometimes referred to as the link prediction problem. However, most studies of link prediction have focused on social networks, and have assumed a completely censused network. In biological networks, it is unlikely that all interactions are censused, and ignoring incomplete detection of interactions may lead to biased or incorrect conclusions...
May 25, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28540497/large-scale-transcriptome-analysis-reveals-arabidopsis-metabolic-pathways-are-frequently-influenced-by-different-pathogens
#3
Zhenhong Jiang, Fei He, Ziding Zhang
Through large-scale transcriptional data analyses, we highlighted the importance of plant metabolism in plant immunity and identified 26 metabolic pathways that were frequently influenced by the infection of 14 different pathogens. Reprogramming of plant metabolism is a common phenomenon in plant defense responses. Currently, a large number of transcriptional profiles of infected tissues in Arabidopsis (Arabidopsis thaliana) have been deposited in public databases, which provides a great opportunity to understand the expression patterns of metabolic pathways during plant defense responses at the systems level...
May 24, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28540496/phenotyping-of-vigs-mediated-gene-silencing-in-rice-using-a-vector-derived-from-a-dna-virus
#4
Ravi Kant, Indranil Dasgupta
Target genes in rice can be optimally silenced if inserted in antisense or hairpin orientation in the RTBV-derived VIGS vector and plants grown at 28 °C and 80% humidity after inoculation. Virus induced gene silencing (VIGS) is a method used to transiently silence genes in dicot as well as monocot plants. For the important monocot species rice, the Rice tungro bacilliform virus (RTBV)-derived VIGS system (RTBV-VIGS), which uses agroinoculation to initiate silencing, has not been standardized for optimal use...
May 24, 2017: Plant Cell Reports
https://www.readbyqxmd.com/read/28536592/trait-associations-in-diversity-panels-of-the-two-common-bean-phaseolus-vulgaris-l-gene-pools-grown-under-well-watered-and-water-stress-conditions
#5
Asrat Asfaw, Daniel Ambachew, Trushar Shah, Matthew W Blair
Common beans are a warm-season, food legume cultivated in areas prone to water limitation throughout their growing season. This study assessed the magnitude and pattern of trait associations for a total of 202 common bean genotypes divided into panels of 81 Andean and 121 Mesoamerican gene pool accessions grown under contrasting treatments of well-watered, non-stress, and water-limited, terminal drought-stress conditions. Linear correlation, complex path coefficient, and genetic divergence analyses were used to dissect the relationship dynamics between traits and the relative contribution of adaptive traits to differentiation among gene pools and genotypes based on drought stress...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28536591/using-regional-climate-projections-to-guide-grassland-community-restoration-in-the-face-of-climate-change
#6
Kristin Kane, Diane M Debinski, Chris Anderson, John D Scasta, David M Engle, James R Miller
Grassland loss has been extensive worldwide, endangering the associated biodiversity and human well-being that are both dependent on these ecosystems. Ecologists have developed approaches to restore grassland communities and many have been successful, particularly where soils are rich, precipitation is abundant, and seeds of native plant species can be obtained. However, climate change adds a new filter needed in planning grassland restoration efforts. Potential responses of species to future climate conditions must also be considered in planning for long-term resilience...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28536587/molecular-evidence-for-natural-hybridization-between-cotoneaster-dielsianus-and-c-glaucophyllus
#7
Mingwan Li, Sufang Chen, Renchao Zhou, Qiang Fan, Feifei Li, Wenbo Liao
Hybridization accompanied by polyploidization and apomixis has been demonstrated as a driving force in the evolution and speciation of many plants. A good example to study the evolutionary process of hybridization associated with polyploidy and apomixis is the genus Cotoneaster (Rosaceae), which includes approximately 150 species, most of which are polyploid apomicts. In this study, we investigated all Cotoneaster taxa distributed in a small region of Malipo, Yunnan, China. Based on the morphological characteristics, four Cotoneaster taxa were identified and sampled: C...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28535423/chromatographic-separation-and-detection-methods-of-aloe-arborescens-miller-constituents-a-systematic-review
#8
REVIEW
Jilan A Nazeam, Haidy A Gad, Hala M El-Hefnawy, Abdel-Naser B Singab
Aloe arborescens Miller (Family Asphodelaceae) is a member of genus Aloe, which is used in traditional medicine to cure various diseases. The extracts of the plant have been reported to possess anticancer, immunomodulator, antidiabetic, anti-inflammatory and antioxidant activities. The phytochemical investigations have revealed diverse chemical constituents, including phenolics [anthraquinones, anthrones, pyrones, chromones and coumarins], polysaccharides [arborans [(1-4) linked glucomannans, polysaccharide (A, B and C): (A: a linear (1-6)-O-α-glucan, B: a branching (1-2)-O-l-arabinose with (1-2)-O-d-galactose linkages and C: (1-4)-O-β-mannan with 18% acetyl group)]], glycoproteins and carboxypeptidase enzyme...
April 29, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28533783/progress-on-azadirachta-indica-based-biopesticides-in-replacing-synthetic-toxic-pesticides
#9
REVIEW
Suman Chaudhary, Rupinder K Kanwar, Alka Sehgal, David M Cahill, Colin J Barrow, Rakesh Sehgal, Jagat R Kanwar
Over the years, extensive use of commercially available synthetic pesticides against phytophagous insects has led to their bioaccumulation in the environment causing increased resistance and reduction in soil biodiversity. Further, 90% of the applied pesticides enter the various environmental resources as a result of run-off, exposing the farmers as well as consumers of the agricultural produce to severe health issues. Therefore, growing attention has been given toward the development of alternate environmentally friendly pesticides/insecticides that would aid an efficient pest management system and also prevent chronic exposures leading to diseases...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28532532/global-phylogenetic-relationships-population-structure-and-gene-flow-estimation-of-trialeurodes-vaporariorum-greenhouse-whitefly
#10
J M Wainaina, P De Barro, L Kubatko, M A Kehoe, J Harvey, D Karanja, L M Boykin
Trialeurodes vaporariorum (Westwood, 1856) (Greenhouse whitefly) is an agricultural pest of global importance. It is associated with damage to plants during feeding and subsequent virus transmission. Yet, global phylogenetic relationships, population structure, and estimation of the rates of gene flow within this whitefly species remain largely unexplored. In this study, we obtained and filtered 227 GenBank records of mitochondrial cytochrome c oxidase I (mtCOI) sequences of T. vaporariorum, across various global locations to obtain a final set of 217 GenBank records...
May 23, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28532161/modelling-of-phytoextraction-efficiency-of-microbially-stimulated-salix-dasyclados-l-in-the-soils-with-different-speciation-of-heavy-metals
#11
Michał Złoch, Tomasz Kowalkowski, Jarosław Tyburski, Katarzyna Hrynkiewicz
Bioaugmentation of soils with selected microorganisms during phytoextraction can be the key solution, but the actual efficacy of this technology should be confirmed for different physicochemical soil parameters and heavy metal availability to guarantee the universality of this method. Equally important is development of the accurate prediction tool to manage phytoremediation process.The main objective of this study was to evaluate the role of three metalotolerant siderophore-producing Streptomyces sp. B1-B3 strains in the phytoremediation of heavy metals with the use of S...
May 22, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28529535/a-method-to-estimate-plant-density-and-plant-spacing-heterogeneity-application-to-wheat-crops
#12
Shouyang Liu, Fred Baret, Denis Allard, Xiuliang Jin, Bruno Andrieu, Philippe Burger, Matthieu Hemmerlé, Alexis Comar
BACKGROUND: Plant density and its non-uniformity drive the competition among plants as well as with weeds. They need thus to be estimated with small uncertainties accuracy. An optimal sampling method is proposed to estimate the plant density in wheat crops from plant counting and reach a given precision. RESULTS: Three experiments were conducted in 2014 resulting in 14 plots across varied sowing density, cultivars and environmental conditions. The coordinates of the plants along the row were measured over RGB high resolution images taken from the ground level...
2017: Plant Methods
https://www.readbyqxmd.com/read/28529082/rice-expression-database-red-an-integrated-rna-seq-derived-gene-expression-database-for-rice
#13
Lin Xia, Dong Zou, Jian Sang, Xingjian Xu, Hongyan Yin, Mengwei Li, Shuangyang Wu, Songnian Hu, Lili Hao, Zhang Zhang
Rice is one of the most important stable food as well as a monocotyledonous model organism for the plant research community. Here, we present RED (Rice Expression Database; http://expression.ic4r.org), an integrated database of rice gene expression profiles derived entirely from RNA-Seq data. RED features a comprehensive collection of 284 high-quality RNA-Seq experiments, integrates a large number of gene expression profiles and covers a wide range of rice growth stages as well as various treatments. Based on massive expression profiles, RED provides a list of housekeeping and tissue-specific genes and dynamically constructs co-expression networks for gene(s) of interest...
May 4, 2017: Journal of Genetics and Genomics, Yi Chuan Xue Bao
https://www.readbyqxmd.com/read/28528390/colonization-by-nitrogen-fixing-frankia-bacteria-causes-short-term-increases-in-herbivore-susceptibility-in-red-alder-alnus-rubra-seedlings
#14
Daniel J Ballhorn, Jacob D Elias, M A Balkan, Rachel F Fordyce, Peter G Kennedy
Carbon allocation demands from root-nodulating nitrogen-fixing bacteria (NFB) can modulate the host plant's chemical phenotype, with strong bottom-up effects on herbivores. In contrast to well-studied rhizobia, the effects of other important NFB on plant chemistry and herbivory are much less understood. Here, combining field surveys in the Oregon Coast Range, USA with laboratory experiments, we analyzed how N2-fixing Frankia bacteria influenced plant growth, chemistry, and herbivory on Alnus rubra (red alder) seedlings...
May 20, 2017: Oecologia
https://www.readbyqxmd.com/read/28527804/nutritive-value-and-fermentation-characteristics-of-alfalfa-mixed-grass-forage-wrapped-with-minimal-stretch-film-layers-and-stored-for-different-lengths-of-time
#15
W K Coblentz, R K Ogden, M S Akins, E A Chow
A key aspect of managing baled silages is to quickly achieve and then rigorously maintain anaerobic conditions within the silage mass. The concept of inserting an O2-limiting barrier (OB) into plastic commercial silage wraps has been evaluated previously, yielding mixed or inconclusive results. Our objective for this study was to maximize the challenge to a commercial polyethylene bale wrap, or the identical wrap containing an OB, by using minimal plastic (4 layers), and then extending storage periods as long as 357 d...
May 17, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28527333/transcriptome-wide-analysis-of-jasmonate-treated-by-2-cells-reveals-new-transcriptional-regulators-associated-with-alkaloid-formation-in-tobacco
#16
Yuping Yang, Pengcheng Yan, Che Yi, Wenzheng Li, Yuhui Chai, Lingling Fei, Ping Gao, Heping Zhao, Yingdian Wang, Michael P Timko, Bingwu Wang, Shengcheng Han
Jasmonates (JAs) are well-known regulators of stress, defence, and secondary metabolism in plants, with JA perception triggering extensive transcriptional reprogramming, including both activation and/or repression of entire metabolic pathways. We performed RNA sequencing based transcriptomic profiling of tobacco BY-2 cells before and after treatment with methyl jasmonate (MeJA) to identify novel transcriptional regulators associated with alkaloid formation. A total of 107,140 unigenes were obtained through de novo assembly, and at least 33,213 transcripts (31%) encode proteins, in which 3419 transcription factors (TFs) were identified, representing 72 gene families, as well as 840 transcriptional regulators (TRs) distributed among 19 gene families...
May 4, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28527179/making-time-conservation-of-biological-clocks-from-fungi-to-animals
#17
Jay C Dunlap, Jennifer J Loros
The capacity for biological timekeeping arose at least three times through evolution, in prokaryotic cyanobacteria, in cells that evolved into higher plants, and within the group of organisms that eventually became the fungi and the animals. Neurospora is a tractable model system for understanding the molecular bases of circadian rhythms in the last of these groups, and is perhaps the most intensively studied circadian cell type. Rhythmic processes described in fungi include growth rate, stress responses, developmental capacity, and sporulation, as well as much of metabolism; fungi use clocks to anticipate daily environmental changes...
May 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28526530/insights-into-the-early-stage-of-pinus-nigra-arn-somatic-embryogenesis-using-discovery-proteomics
#18
Katarína Klubicová, Lubica Uvácková, Maksym Danchenko, Peter Nemecek, Ludovít Skultéty, Ján Salaj, Terézia Salaj
The somatic embryogenesis in conifers represents a suitable model of plant regeneration system facilitating studies of fundamental aspects of an early development as well as in vitro micropropagation. The aim of our study was to deeper understand the somatic embryogenesis in the conifer tree Pinus nigra Arn. Comparative proteomic analysis based on 2D-PAGE in 1) proliferating embryogenic tissues (E) initiated from immature zygotic embryos, 2) non-embryogenic calli (NEC) initiated from cotyledons of somatic seedlings of the same genotypes, 3) embryogenic tissues that lost the maturation capacity (E-L) of two cell lines (E362, E366)...
May 16, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28525814/risk-assessment-of-triclosan-in-the-global-environment-using-a-probabilistic-approach
#19
Jiahua Guo, Hisato Iwata
The occurrence of antimicrobial agent triclosan (TCS) in the global aquatic and terrestrial environment is an emerging concern. While risk assessment for TCS is available in certain countries, no studies have attempted to assess the risk of TCS worldwide. This could be due to lack of method to characterize the global exposure. The present study therefore proposed a probabilistic-based approach to approximate the percent-ranked measured environmental concentrations (MECs) by estimating exposure concentration distribution (ECD) for different environmental compartments on a global scale, incorporating approximate 1200 single MECs...
May 16, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28523639/association-mapping-of-yield-and-yield-related-traits-under-reproductive-stage-drought-stress-in-rice-oryza-sativa-l
#20
B P Mallikarjuna Swamy, Noraziyah Abd Aziz Shamsudin, Site Noorzuraini Abd Rahman, Ramil Mauleon, Wickneswari Ratnam, Ma Teressa Sta Cruz, Arvind Kumar
BACKGROUND: The identification and introgression of major-effect QTLs for grain yield under drought are some of the best and well-proven approaches for improving the drought tolerance of rice varieties. In the present study, we characterized Malaysian rice germplasm for yield and yield-related traits and identified significant trait marker associations by structured association mapping. RESULTS: The drought screening was successful in screening germplasm with a yield reduction of up to 60% and heritability for grain yield under drought was up to 78%...
December 2017: Rice
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