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https://www.readbyqxmd.com/read/28350798/research-priorities-for-harnessing-plant-microbiomes-in-sustainable-agriculture
#1
Posy E Busby, Chinmay Soman, Maggie R Wagner, Maren L Friesen, James Kremer, Alison Bennett, Mustafa Morsy, Jonathan A Eisen, Jan E Leach, Jeffery L Dangl
Feeding a growing world population amidst climate change requires optimizing the reliability, resource use, and environmental impacts of food production. One way to assist in achieving these goals is to integrate beneficial plant microbiomes-i.e., those enhancing plant growth, nutrient use efficiency, abiotic stress tolerance, and disease resistance-into agricultural production. This integration will require a large-scale effort among academic researchers, industry researchers, and farmers to understand and manage plant-microbiome interactions in the context of modern agricultural systems...
March 2017: PLoS Biology
https://www.readbyqxmd.com/read/28350531/phytophthora-infestans-effectors-ipi-o1-and-ipi-o4-each-contribute-to-pathogen-virulence
#2
Yu Chen, Dennis A Halterman
Potato late blight, caused by the oomycete pathogen Phytophthora infestans, is one of the most destructive plant diseases. Despite decades of intensive breeding efforts, it remains a threat to potato production worldwide, because newly evolved pathogen strains have overcome major resistance genes quickly. The RB protein, from the diploid wild potato species Solanum bulbocastanum, confers partial resistance to most P. infestans strains through its recognition of members of the corresponding pathogen effector protein family IPI-O...
March 29, 2017: Phytopathology
https://www.readbyqxmd.com/read/28346511/is-manure-an-alternative-to-topsoil-in-road-embankment-restoration
#3
Begoña Peco, Desirée Rivera, Pablo García-Palacios, Berta M Jauregui
One of the main steps in road and railway embankment restoration is the spreading of previously removed topsoil, which provides an input of seeds, organic matter and microorganisms and encourages the establishment of a vegetation cover, essential to stabilise the embankment and blend it with the landscape. However, topsoil is a scarce resource, prompting the search for economic alternatives with similar results. The present study compares the results of spreading topsoil with an organic amendment (manure) for the soil's physico-chemical properties, erosion resistance and microbial activity, floristic richness and composition, and bare soil cover...
2017: PloS One
https://www.readbyqxmd.com/read/28346507/olive-oil-bioactives-protect-pigs-against-experimentally-induced-chronic-inflammation-independently-of-alterations-in-gut-microbiota
#4
Martin Liehr, Alessandro Mereu, Jose Javier Pastor, Jose Carlos Quintela, Stefanie Staats, Gerald Rimbach, Ignacio Rodolfo Ipharraguerre
Subclinical chronic inflammation (SCI) is associated with impaired animal growth. Previous work has demonstrated that olive-derived plant bioactives exhibit anti-inflammatory properties that could possibly counteract the growth-depressing effects of SCI. To test this hypothesis and define the underlying mechanism, we conducted a 30-day study in which piglets fed an olive-oil bioactive extract (OBE) and their control counterparts (C+) were injected repeatedly during the last 10 days of the study with increasing doses of Escherichia coli lipopolysaccharides (LPS) to induce SCI...
2017: PloS One
https://www.readbyqxmd.com/read/28346401/targeted-base-editing-in-rice-and-tomato-using-a-crispr-cas9-cytidine-deaminase-fusion
#5
Zenpei Shimatani, Sachiko Kashojiya, Mariko Takayama, Rie Terada, Takayuki Arazoe, Hisaki Ishii, Hiroshi Teramura, Tsuyoshi Yamamoto, Hiroki Komatsu, Kenji Miura, Hiroshi Ezura, Keiji Nishida, Tohru Ariizumi, Akihiko Kondo
We applied a fusion of CRISPR-Cas9 and activation-induced cytidine deaminase (Target-AID) for point mutagenesis at genomic regions specified by single guide RNAs (sgRNAs) in two crop plants. In rice, we induced multiple herbicide-resistance point mutations by multiplexed editing using herbicide selection, while in tomato we generated marker-free plants with homozygous heritable DNA substitutions, demonstrating the feasibility of base editing for crop improvement.
March 27, 2017: Nature Biotechnology
https://www.readbyqxmd.com/read/28346370/de-novo-assembly-annotation-and-characterization-of-root-transcriptomes-of-three-caladium-cultivars-with-a-focus-on-necrotrophic-pathogen-resistance-defense-related-genes
#6
Zhe Cao, Zhanao Deng
Roots are vital to plant survival and crop yield, yet few efforts have been made to characterize the expressed genes in the roots of non-model plants (root transcriptomes). This study was conducted to sequence, assemble, annotate, and characterize the root transcriptomes of three caladium cultivars (Caladium × hortulanum) using RNA-Seq. The caladium cultivars used in this study have different levels of resistance to Pythiummyriotylum, the most damaging necrotrophic pathogen to caladium roots. Forty-six to 61 million clean reads were obtained for each caladium root transcriptome...
March 27, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28346030/antimicrobial-activity-of-eugenol-and-essential-oils-containing-eugenol-a-mechanistic-viewpoint
#7
Anna Marchese, Ramona Barbieri, Erika Coppo, Ilkay Erdogan Orhan, Maria Daglia, Seyed Fazel Nabavi, Morteza Izadi, Mohammad Abdollahi, Seyed Mohammad Nabavi, Marjan Ajami
Eugenol is a hydroxyphenyl propene, naturally occurring in the essential oils of several plants belonging to the Lamiaceae, Lauraceae, Myrtaceae, and Myristicaceae families. It is one of the major constituents of clove (Syzygium aromaticum (L.) Merr. & L.M. Perry, Myrtaceae) oil and is largely used in both foods and cosmetics as a flavoring agent. A large body of recent scientific evidence supports claims from traditional medicine that eugenol exerts beneficial effects on human health. These effects are mainly associated with antioxidant and anti-inflammatory activities...
March 27, 2017: Critical Reviews in Microbiology
https://www.readbyqxmd.com/read/28345654/the-soybean-gmsnap18-gene-underlies-two-types-of-resistance-to-soybean-cyst-nematode
#8
Shiming Liu, Pramod K Kandoth, Naoufal Lakhssassi, Jingwen Kang, Vincent Colantonio, Robert Heinz, Greg Yeckel, Zhou Zhou, Sadia Bekal, Johannes Dapprich, Bjorn Rotter, Silvia Cianzio, Melissa G Mitchum, Khalid Meksem
Two types of resistant soybean (Glycine max (L.) Merr.) sources are widely used against soybean cyst nematode (SCN, Heterodera glycines Ichinohe). These include Peking-type soybean, whose resistance requires both the rhg1-a and Rhg4 alleles, and PI 88788-type soybean, whose resistance requires only the rhg1-b allele. Multiple copy number of PI 88788-type GmSNAP18, GmAAT, and GmWI12 in one genomic segment simultaneously contribute to rhg1-b resistance. Using an integrated set of genetic and genomic approaches, we demonstrate that the rhg1-a Peking-type GmSNAP18 is sufficient for resistance to SCN in combination with Rhg4...
March 27, 2017: Nature Communications
https://www.readbyqxmd.com/read/28345304/chemical-evidence-for-the-effect-of-urochloa-ruziziensis-on-glyphosate-resistant-soybeans
#9
Mariluce Nepomuceno, Nuria Chinchilla, Rosa M Varela, José M G Molinillo, Rodney Lacret, Pedro L C A Alves, Francisco A Macias
BACKGROUND: Soybean (Glycine max) is an important oleaginous legume that has been cultivated in new areas in Brazil, including pastures. Problems of reduced production yields have been reported by soybean growers when the crop is sown immediately after desiccation of pastures of Urochloa spp. using glyphosate. The objective of this work was to extract, isolate, and identify the major chemicals from U. ruziziensis that have phytotoxic activity and to evaluate the possible relation between this effect and the reduced soybean yield...
March 26, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28344571/translation-initiation-factor-eif4e-and-eifiso4e-are-both-required-for-peanut-stripe-virus-infection-in-peanut-arachis-hypogaea-l
#10
Manlin Xu, Hongfeng Xie, Juxiang Wu, Lianhui Xie, Jinguang Yang, Yucheng Chi
Peanut stripe virus (PStV) belongs to the genus Potyvirus and is the most important viral pathogen of cultivated peanut (Arachis hypogaea L.). The eukaryotic translation initiation factor, eIF4E, and its isoform, eIF(iso)4E, play key roles during virus infection in plants, particularly Potyvirus. In the present study, we cloned the eIF4E and eIF(iso)4E homologs in peanut and named these as PeaeIF4E and PeaeIF(iso)4E, respectively. Quantitative real-time PCR (qRT-PCR) analysis showed that these two genes were expressed during all growth periods and in all peanut organs, but were especially abundant in young leaves and roots...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28344474/biologically-guided-isolation-of-leishmanicidal-secondary-metabolites-from-euphorbia-peplus-l
#11
Elham Amin, Abeer Moawad, Hossam Hassan
Leishmaniasis is a worldwide health problem, highly endemic in developing countries. Moreover, the severe side effects and the reported drug resistance make it an urgent need to search for effective drugs that can replace or supplement those currently used. In a research program designed to investigate the antileishmanial activity of plants collected from the Egyptian flora, twenty extracts from fifteen plants growing in Egypt have been investigated for in vitro leishmanicidal activity against Leishmania donovani promastigotes...
February 2017: Saudi Pharmaceutical Journal: SPJ: the Official Publication of the Saudi Pharmaceutical Society
https://www.readbyqxmd.com/read/28344030/antibacterial-activity-of-medicinal-plants-from-the-physicians-of-myddvai-a-13-th-century-welsh-medical-manuscript
#12
Charles Wagner, Jillian De Gezelle, Maureen Robertson, Keith Robertson, Mickey Wilson, Slavko Komarnytsky
ETHNOPHARMACOLOGICAL RELEVANCE: Antimicrobial drug resistance is a growing threat to global public health. Historical records and herbal texts relating to traditional Celtic medicine indicate an extensive pharmacopeia of plants for treating infections likely caused by microbes. However, a major barrier for successful integration of these remedies into mainstream practice is the current lack of accurate interpretation and scientific validation. MATERIALS AND METHODS: We applied Mobile Discovery approach to the Isle of Arran, Scotland, for in situ targeted screening of 83 out of 138 plants identified in Meddygion Myddvai (a 13(th) century Welsh manuscript) to treat conditions related to microbial infections, and an additional 18 plants from modern ethnobotanical knowledge on the island...
March 24, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28343358/expression-of-the-cyanobacterial-enzyme-cyanase-increases-cyanate-metabolism-and-cyanate-tolerance-in-arabidopsis
#13
Rashad Kebeish, Omar Al-Zoubi
Cyanate and its derivatives are considered as environmental hazardous materials. Cyanate is released to the environment through many chemical industries and mining wastewater. Cyanase enzyme converts cyanate into CO2 and NH3 in a bicarbonate-dependent reaction. At low cyanate concentrations, the endogenous plant cyanases play a vital role in cyanate detoxification. However, such cyanate biodegradation system is probably insufficient due to the excess cyanate concentrations at contaminated sites. In this study, we have transferred the activity of the cyanobacterial cyanase into Arabidopsis thaliana plants in order to enhance plant resistance against cyanate toxicity...
March 25, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28343064/a-barley-homolog-of-yeast-atg6-is-involved-in-multiple-abiotic-stress-responses-and-stress-resistance-regulation
#14
Xiaowei Zeng, Zhanghui Zeng, Cuicui Liu, Weiyi Yuan, Ning Hou, Hongwu Bian, Muyuan Zhu, Ning Han
Autophagy is a highly conserved degradation pathway among eukaryote cells, which can recycle damaged or unwanted cell materials upon encountering stress conditions. As a key component of the Class III PI3K kinase complex, ATG6/Beclin-1 is essential for autophagosome formation. In this study, we isolated a putative HvATG6 gene in barley genome. The protein encoded by HvATG6 shares high sequence identity to ATG6 orthologs in rice and wheat, and has a typical autophagy-specific domain containing segments of repeated β-sheet-α-helix...
March 19, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28341825/transcriptomic-profile-of-tobacco-in-response-to-phytophthora-nicotianae-infection
#15
Jian-Kang Yang, Zhi-Jun Tong, Dun-Huang Fang, Xue-Jun Chen, Ke-Qin Zhang, Bing-Guang Xiao
Black shank, caused by Phytophthora nicotianae (P. nicotianae), is a serious disease of cultivated tobacco (Nicotiana tabacum) worldwide. The interactions between tobacco and P. nicotianae are complex and the outcomes of the interactions depend on the tobacco genotype, P. nicotianae strain, and environmental conditions. In this study, we used RNA-sequencing (RNA-Seq) to investigate and compare transcriptional changes in the stems of tobacco upon inoculation with P. nicotianae strain race 0. We used two tobacco varieties: RBST (named from resistance to black shank and tobacco mosaic virus), which was resistant to the P...
March 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28341807/the-human-cancer-cell-active-toxin-cry41aa-from-bacillus-thuringiensis-acts-like-its-insecticidal-counterparts
#16
Vidisha Krishnan, Barbara Domanska, Alicia Elhigazi, Fatai Afolabi, Michelle J West, Neil Crickmore
Understanding how certain protein toxins from the normally insecticidal bacterium Bacillus thuringiensis target human cell lines has implications for both the risk assessment of products containing these toxins and potentially for cancer therapy. This understanding requires knowledge of whether the human cell active toxins work by the same mechanism as their insecticidal counterparts or by alternative ones. The B. thuringiensis Cry41Aa (also known as Parasporin3) toxin is structurally related to the toxins synthesized by commercially produced transgenic insect-resistant plants, with the notable exception of an additional C-terminal beta-trefoil ricin domain...
March 24, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28341675/investigating-enterobius-vermicularis-as-a-novel-surrogate-of-helminth-ova-presence-in-tertiary-wastewater-treatment-plants
#17
Sydney P Rudko, Norma J Ruecker, Nicholas J Ashbolt, Norman F Neumann, Patrick C Hanington
Significant effort has gone into assessing the fate and removal of viruses, bacteria and protozoan parasites during wastewater treatment to provide data addressing potential health risks associated with reuse options. Comparatively less is known about the fate of parasitic worm ova species in these complex systems. It is largely assumed that these helminths settle and are removed with the sludge, and consequently represent a relatively low risk for wastewater reuse applications. However, helminths are a highly diverse group of organisms that display a wide range of physical properties that complicate the application of a single performance expectation for helminth reduction during wastewater treatment...
March 24, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28340622/anti-plasmodial-activity-of-norcaesalpin-d-and-extracts-of-four-medicinal-plants-used-traditionally-for-treatment-of-malaria
#18
Ramadhani Selemani Omari Nondo, Mainen Julius Moshi, Paul Erasto, Pax Jessey Masimba, Francis Machumi, Abdul Waziri Kidukuli, Matthias Heydenreich, Denis Zofou
BACKGROUND: Malaria is an old life-threatening parasitic disease that is still affecting many people, mainly children living in sub-Saharan Africa. Availability of effective antimalarial drugs played a significant role in the treatment and control of malaria. However, recent information on the emergence of P. falciparum parasites resistant to one of the artemisinin-based combination therapies suggests the need for discovery of new drug molecules. Therefore, this study aimed to evaluate the antiplasmodial activity of extracts, fractions and isolated compound from medicinal plants traditionally used in the treatment of malaria in Tanzania...
March 24, 2017: BMC Complementary and Alternative Medicine
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
#19
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/28339295/antifungal-plant-defensins-increased-insight-in-their-mode-of-action-as-a-basis-for-their-use-to-combat-fungal-infections
#20
Tanne L Cools, Caroline Struyfs, Bruno Pa Cammue, Karin Thevissen
Plant defensins are small, cationic peptides with a highly conserved 3D structure. They have been studied extensively in the past decades. Various biological activities have been attributed to plant defensins, such as anti-insect and antimicrobial activities, but they are also known to affect ion channels and display antitumor activity. This review focuses on the structure, biological activity and antifungal mode of action of some well-characterized plant defensins, with particular attention to their fungal membrane target(s), their induced cell death mechanisms as well as their antibiofilm activity...
March 24, 2017: Future Microbiology
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