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https://www.readbyqxmd.com/read/28331586/how-to-induce-defense-responses-in-wild-plant-populations-using-bilberry-vaccinium-myrtillus-as-example
#1
Tarald Seldal, Stein Joar Hegland, Knut Rydgren, Cesar Rodriguez-Saona, Joachim Paul Töpper
Inducible plant defense is a beneficial strategy for plants, which imply that plants should allocate resources from growth and reproduction to defense when herbivores attack. Plant ecologist has often studied defense responses in wild populations by biomass clipping experiments, whereas laboratory and greenhouse experiments in addition apply chemical elicitors to induce defense responses. To investigate whether field ecologists could benefit from methods used in laboratory and greenhouse studies, we established a randomized block-design in a pine-bilberry forest in Western Norway...
March 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28330304/elicitation-of-gymnemic-acid-production-in-cell-suspension-cultures-of-gymnema-sylvestre-r-br-through-endophytic-fungi
#2
Vasudeva Reddy Netala, Venkata Subbaiah Kotakadi, Susmila Aparna Gaddam, Sukhendu Bikash Ghosh, Vijaya Tartte
The enhancement of plant secondary metabolite production in cell suspension cultures through biotic or abiotic elicitation has become a potential biotechnological approach for commercialization or large-scale production of bioactive compounds. Gymnema sylvestre R.Br. is an important medicinal plant, rich in a group of oleanane triterpenoid saponins called gymnemic acid, well known for its anti-diabetic activity. Two endophytic fungal strains were isolated from the leaves of G. sylvestre and identified as Polyancora globosa and Xylaria sp...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330189/defense-response-enhancement-in-strawberry-via-elicitors
#3
Gihan M H Hussein, Tahany M A Abdel-Rahman, A H Alwan
In this study, cell-suspension culture of strawberry (Fragaria × ananassa), cultivars Camarosa, and Sweet Charlie has been established. Embryogenic callus was induced by incubating the in vitro juvenile leaf explants on medium, containing 2-mg/l picloram at dark. Suspension culture was initiated from 4-week-old embryogenic calli in the liquid MS medium with 1-mg/l 2,4-D and 2-mg/l picloram. Suspension culture was maintained by sub-culturing each 3 weeks into a fresh medium. At week 9 after third sub-cultures, torpedo and cotyledonary embryo stages were observed...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28322091/jasmonic-and-salicylic-acids-enhanced-phytochemical-production-and-biological-activities-in-cell-suspension-cultures-of-spine-gourd-momordica-dioica-roxb
#4
Ill-Min Chung, Kaliyaperumal Rekha, Govindasamy Rajakumar, Muthu Thiruvengadam
In vitro cell suspension culture was established for the production of commercially valuable phytochemicals in Momordica dioica. The influence of elicitors in jasmonic acid (JA) and salicylic acid (SA) increased their effect on phytochemical production and biomass accumulation in M. dioica. The results indicate that compared with non-elicited cultures, JA- and SA-elicited cell suspension cultures had significantly enhanced phenolic, flavonoid, and carotenoid production, as well as antioxidant, antimicrobial, and antiproliferative activities...
March 2017: Acta Biologica Hungarica
https://www.readbyqxmd.com/read/28286508/global-transcriptome-analysis-and-identification-of-differentially-expressed-genes-in-strawberry-after-preharvest-application-of-benzothiadiazole-and-chitosan
#5
Lucia Landi, Rita M De Miccolis Angelini, Stefania Pollastro, Erica Feliziani, Franco Faretra, Gianfranco Romanazzi
The use of resistance inducers is a novel strategy to elicit defense responses in strawberry fruit to protect against preharvest and postharvest decay. However, the mechanisms behind the specific resistance inducers are not completely understood. Here, global transcriptional changes in strawberry fruit were investigated using RNA-Seq technology. Preharvest, benzothiadiazole (BTH) and chitosan were applied to the plant canopy, and the fruit were harvested at 6, 12, and 24 h post-treatment. Overall, 5,062 and 5,210 differentially expressed genes (fold change ≥ 2) were identified in these fruits under the BTH and chitosan treatments, respectively, as compared to the control expression...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28285413/comprehensive-assessment-of-the-genes-involved-in-withanolide-biosynthesis-from-withania-somnifera-chemotype-specific-and-elicitor-responsive-expression
#6
Aditya Vikram Agarwal, Parul Gupta, Deeksha Singh, Yogeshwar Vikram Dhar, Deepak Chandra, Prabodh Kumar Trivedi
Withania somnifera (L.) Dunal (Family, Solanaceae), is among the most valuable medicinal plants used in Ayurveda owing to its rich reservoir of pharmaceutically active secondary metabolites known as withanolides. Withanolides are C28-steroidal lactones having a triterpenoidal metabolic origin synthesised via mevalonate (MVA) pathway and methyl-D-erythritol-4-phosphate (MEP) pathway involving metabolic intermediacy of 24-methylene (C30-terpenoid) cholesterol. Phytochemical studies suggest differences in the content and/or nature of withanolides in different tissues of different chemotypes...
March 11, 2017: Functional & Integrative Genomics
https://www.readbyqxmd.com/read/28284182/the-prediction-of-a-pathogenesis-related-secretome-of-puccinia-helianthi-through-high-throughput-transcriptome-analysis
#7
Lan Jing, Dandan Guo, Wenjie Hu, Xiaofan Niu
BACKGROUND: Many plant pathogen secretory proteins are known to be elicitors or pathogenic factors,which play an important role in the host-pathogen interaction process. Bioinformatics approaches make possible the large scale prediction and analysis of secretory proteins from the Puccinia helianthi transcriptome. The internet-based software SignalP v4.1, TargetP v1.01, Big-PI predictor, TMHMM v2.0 and ProtComp v9.0 were utilized to predict the signal peptides and the signal peptide-dependent secreted proteins among the 35,286 ORFs of the P...
March 11, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/28284060/phosphite-shifts-physiological-and-hormonal-profile-of-monterey-pine-and-delays-fusarium-circinatum-progression
#8
Andreia Cerqueira, Artur Alves, Helder Berenguer, Barbara Correia, Aurelio Gómez-Cadenas, Julio Javier Diez, Pedro Monteiro, Glória Pinto
Fusarium circinatum is the causal agent of pitch canker disease affecting Pinus spp. and Pseudotsuga menziesii worldwide. Under strict quarantine measures, alternative approaches for disease control are necessary. Phosphite (Phi) salts are known for their fungicidal activity and as plant resistance elicitors; however, its potential is yet to be acknowledged in the Pinus-F. circinatum model. The main aim of this study was to assess whether the application of a Phi-based commercial formulation would delay the progression of the pitch canker on Pinus radiata plants, and on the in vitro fungal growth...
February 27, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28265994/modulating-the-levels-of-plant-hormone-cytokinins-at-the-host-pathogen-interface
#9
Muhammad Naseem, Shabana Shams, Thomas Roitsch
Cytokinins are adenine and non-adenine derived heterogeneous class of regulatory molecules that participate in almost every aspect of plant biology. They also affect plant defense responses as well as help microbial pathogens to establish pathogenesis. The functional approaches that ensure desired and subtle modulations in the levels of plant cytokinins are highly instrumental in assessing their functions in plant immunity. Here, we describe a detailed working protocol regarding the enhanced production of cytokinins from plants that harbor isopentenyltransferase (IPT) enzyme gene under the control of 4xJERE (jasmonic acid and elicitor-responsive element) pathogen-inducible promoter...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28264763/peptidoglycan-sensing-by-octopaminergic-neurons-modulates-drosophila-oviposition
#10
C Leopold Kurz, Bernard Charroux, Delphine Chaduli, Annelise Viallat-Lieutaud, Julien Royet
As infectious diseases pose a threat to host integrity, eukaryotes have evolved mechanisms to eliminate pathogens. In addition to develop strategies reducing infection, animals can engage in behaviors that lower the impact of the infection. The molecular mechanisms by which microbes impact host behavior are not well understood. We demonstrate that bacterial infection of Drosophila females reduces oviposition and that peptidoglycan, the component that activates Drosophila antibacterial response, is also the elicitor of this behavioral change...
March 7, 2017: ELife
https://www.readbyqxmd.com/read/28261225/metabolic-fingerprint-of-ps3-induced-resistance-of-grapevine-leaves-against-plasmopara-viticola-revealed-differences-in-elicitor-triggered-defenses
#11
Marielle Adrian, Marianna Lucio, Chloé Roullier-Gall, Marie-Claire Héloir, Sophie Trouvelot, Xavier Daire, Basem Kanawati, Christelle Lemaître-Guillier, Benoît Poinssot, Régis Gougeon, Philippe Schmitt-Kopplin
Induction of plant resistance against pathogens by defense elicitors constitutes an attractive strategy to reduce the use of fungicides in crop protection. However, all elicitors do not systematically confer protection against pathogens. Elicitor-induced resistance (IR) thus merits to be further characterized in order to understand what makes an elicitor efficient. In this study, the oligosaccharidic defense elicitors H13 and PS3, respectively, ineffective and effective to trigger resistance of grapevine leaves against downy mildew, were used to compare their effect on the global leaf metabolism...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28250598/impacts-of-methyl-jasmonate-and-phenyl-acetic-acid-on-biomass-accumulation-and-antioxidant-potential-in-adventitious-roots-of-ajuga-bracteosa-wall-ex-benth-a-high-valued-endangered-medicinal-plant
#12
Sabahat Saeed, Huma Ali, Tariq Khan, Waqas Kayani, Mubarak Ali Khan
Ajuga bracteosa is a medicinally important plant globally used in the folk medicine against many serious ailments. In the present study, effects of two significant elicitors, methyl jasmonate (Me-J) and phenyl acetic acid (PAA) were studied on growth parameters, secondary metabolites production, and antioxidant potential in adventitious root suspension cultures of A. bracteosa. The results showed a substantial increase in biomass accumulation, exhibiting longer log phases of cultures growth in response to elicitor treatments, in comparison to control...
January 2017: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
https://www.readbyqxmd.com/read/28242654/cellulose-derived-oligomers-act-as-damage-associated-molecular-patterns-and-trigger-defense-like-responses
#13
Clarice de Azevedo Souza, Shundai Li, Andrew Z Lin, Freddy Boutrot, Guido Grossmann, Cyril Zipfel, Shauna Somerville
The plant cell wall, often the site of initial encounters between plants and their microbial pathogens, is composed of a complex mixture of cellulose, hemicellulose and pectin polysaccharides, as well as proteins. The concept of damage-associated molecular patterns (DAMPs) was proposed to describe plant elicitors like oligogalacturonides (OGs), which can be derived by the breakdown of the pectin homogalacturon by pectinases. OGs act via many of the same signaling steps as pathogen- or microbe-associated molecular patterns (PAMPs) to elicit defenses and provide protection against pathogens...
February 27, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28220426/measuring-callose-deposition-an-indicator-of-cell-wall-reinforcement-during-bacterial-infection-in-arabidopsis
#14
Lin Jin, David M Mackey
The plant cell wall responds dynamically during interaction with various pathogens. Upon recognition of "nonself" components, plant cells deploy a variety of immune responses including cell wall fortification. Callose, a β-(1, 3)-D-glucan polymer, is a component of the material deposited at the site of infection between the plasma membrane and the preexisting cell wall that is hypothesized to serve as a physical barrier and platform for directed antimicrobial compound deposition. The defense-associated function of callose deposition is supported by its induction during pathogen-associated molecular patterns (PAMP)-triggered immunity (PTI) and its inhibition by defense suppressing virulence effectors...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28220421/analysis-of-pamp-triggered-ros-burst-in-plant-immunity
#15
Yuying Sang, Alberto P Macho
The plant perception of pathogen-associated molecular patterns triggers a plethora of cellular immune responses. One of these responses is a rapid and transient burst of reactive oxygen species (ROS) mediated by plasma membrane-localized NADPH oxidases. The ROS burst requires a functional receptor complex and the contribution of several additional regulatory components. In laboratory conditions, the ROS burst can be detected a few minutes after the treatment with an immunogenic microbial elicitor. For these reasons, the elicitor-triggered ROS burst has been often exploited as readout to probe the contribution of plant components to early immune responses...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28220413/methods-of-isolation-and-characterization-of-oligogalacturonide-elicitors
#16
Manuel Benedetti, Benedetta Mattei, Daniela Pontiggia, Gianni Salvi, Daniel Valentin Savatin, Simone Ferrari
Oligogalacturonides (OGs) are pectic fragments derived from the partial degradation of homogalacturonan in the plant cell wall and able to elicit plant defence responses. Recent methodological advances in the isolation of OGs from plant tissues and their characterization have confirmed their role as bona fide plant Damage-Associated Molecular Patterns. Here, we describe the methods for the isolation of OGs from Arabidopsis leaf tissues and for the characterization of OG structure and biological activity.
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28220134/genome-wide-dissection-of-the-heat-shock-transcription-factor-family-genes-in-arachis
#17
Pengfei Wang, Hui Song, Changsheng Li, Pengcheng Li, Aiqin Li, Hongshan Guan, Lei Hou, Xingjun Wang
Heat shock transcription factors (Hsfs) are important transcription factors (TFs) in protecting plants from damages caused by various stresses. The released whole genome sequences of wild peanuts make it possible for genome-wide analysis of Hsfs in peanut. In this study, a total of 16 and 17 Hsf genes were identified from Arachis duranensis and A. ipaensis, respectively. We identified 16 orthologous Hsf gene pairs in both peanut species; however HsfXs was only identified from A. ipaensis. Orthologous pairs between two wild peanut species were highly syntenic...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28217102/grima-a-distinct-emotion-concept
#18
Inge Schweiger Gallo, José-Miguel Fernández-Dols, Peter M Gollwitzer, Andreas Keil
People experience an unpleasant sensation when hearing a scratch on a board or plate. The present research focuses on this aversive experience known in Spanish as 'grima' with no equivalent term in English and German. We hypothesized that this aversive experience constitutes a distinctive, separate emotional concept. In Study 1, we found that the affective meaning of 'grima' was closer to disgust than to other emotion concepts. Thus, in Study 2 we explored the features of grima and compared them with disgust...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28216605/an-overview-of-stress-induced-resveratrol-synthesis-in-grapes-perspectives-for-resveratrol-enriched-grape-products
#19
REVIEW
Mohidul Hasan, Hanhong Bae
Resveratrol is the most important stilbene phytoalexin synthesized naturally or induced in plants, as a part of their defense mechanism. Grapes and their derivative products, including juice and wine, are the most important natural sources of resveratrol, consisting of notably higher amounts than other natural sources like peanuts. Consumption of red wine with its presence of resveratrol explained the "French Paradox". Hence, the demand of resveratrol from grapes is increasing. Moreover, as a natural source of resveratrol, grapes became very important in the nutraceutical industry for their benefits to human health...
February 14, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28214727/a-new-strategy-to-enhance-the-biosynthesis-of-trans-resveratrol-by-overexpressing-stilbene-synthase-gene-in-elicited-vitis-vinifera-cell-cultures
#20
Mingyu Chu, M A Pedreño, Nuria Alburquerque, Lydia Faize, Lorenzo Burgos, Lorena Almagro
In this work, transgenic lines of suspension cultured cells of Vitis vinifera cv. Monastrell containing the plasmid pMOG800-sts have been obtained. The cell growth of these transgenic cell lines decreased slightly as compared to non-transgenic suspension cultured cells, while cell viability was not affected. In addition, the elicitation with cyclodextrins and methyl jasmonate enhanced the production of trans-resveratrol, observing the highest levels of this compound in sts-expressing transgenic Vitis suspension cultured cells with the sts expression cassette in the forwards orientation...
February 8, 2017: Plant Physiology and Biochemistry: PPB
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