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https://www.readbyqxmd.com/read/28208159/two-previously-unknown-phytophthora-species-associated-with-brown-rot-of-pomelo-citrus-grandis-fruits-in-vietnam
#1
Ivana Puglisi, Alessandro De Patrizio, Leonardo Schena, Thomas Jung, Maria Evoli, Antonella Pane, Nguyen Van Hoa, Mai Van Tri, Sandra Wright, Mauritz Ramstedt, Christer Olsson, Roberto Faedda, Gaetano Magnano di San Lio, Santa Olga Cacciola
Two distinct Phytophthora taxa were found to be associated with brown rot of pomelo (Citrus grandis), a new disease of this ancestral Citrus species, in the Vinh Long province, Mekong River Delta area, southern Vietnam. On the basis of morphological characters and using the ITS1-5.8S-ITS2 region of the rDNA and the cytochrome oxidase subunit 1 (COI) as barcode genes, one of the two taxa was provisionally named as Phytophthora sp. prodigiosa, being closely related to but distinct from P. insolita, a species in Phytophthora Clade 9, while the other one, was closely related to but distinct from the Clade 2 species P...
2017: PloS One
https://www.readbyqxmd.com/read/28207822/identification-classification-and-transcription-profiles-of-the-b-type-response-regulator-family-in-pear
#2
Junbei Ni, Songling Bai, Ling Gao, Minjie Qian, Linbing Zhong, Yuanwen Teng
Type-B response regulators (B-RRs) are transcription factors that function in the final step of two-component signaling systems. In model plants, B-RRs have been shown to play important roles in cytokinin signal transduction. However, the functions of B-RRs in pear have not been well studied. In this report, we conducted a genome-wide analysis and identified 11 putative genes encoding B-PpRR proteins based on the published genome sequence of Pyrus bretschneideri. A phylogenetic tree of the B-PpRR family was constructed, and the motif distribution, chromosome localization, and gene structure of B-PpRR family genes were determined...
2017: PloS One
https://www.readbyqxmd.com/read/28207815/generalist-dispersers-promote-germination-of-an-alien-fleshy-fruited-tree-invading-natural-grasslands
#3
Martín Raúl Amodeo, María Belén Vázquez, Sergio Martín Zalba
Plants with animal-dispersed fruits seem to overcome the barriers that limit their spread into new habitats more easily than other invasive plants and, at the same time, they pose special difficulties for containment, control or eradication. The effects of animals on plant propagules can be very diverse, with positive, neutral or negative consequences for germination and recruitment. Moreover, the environmental conditions where the seeds are deposited and where the post-dispersal processes take place can be crucial for their fate...
2017: PloS One
https://www.readbyqxmd.com/read/28203243/foliar-nutrition-biostimulants-and-prime-like-dynamics-in-fruit-tree-physiology-new-insights-on-an-old-topic
#4
REVIEW
Georgia Tanou, Vasileios Ziogas, Athanassios Molassiotis
Despite the fact that the usage of foliar nutrients has long history, many aspects of fertilization through leaves are still unknown. Herein, we review the current knowledge regarding the canopy fertilization putting special emphasis on Fe nutrition and briefly provide insights into the nanofertilizer technology of the foliar feeding of fruit crops. In addition, this paper discusses the main aspects of the foliar application of biostimulants regarding crucial factors of fruit cropping systems, such as fruit yield/size, tolerance to environmental stresses, and nutrient availability...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28203241/models-for-predicting-the-architecture-of-different-shoot-types-in-apple
#5
Emna Baïram, Mickaël Delaire, Christian Le Morvan, Gerhard Buck-Sorlin
In apple, the first-order branch of a tree has a characteristic architecture constituting three shoot types: bourses (rosettes), bourse shoots, and vegetative shoots. Its overall architecture as well as that of each shoot thus determines the distribution of sources (leaves) and sinks (fruits) and could have an influence on the amount of sugar allocated to fruits. Knowledge of architecture, in particular the position and area of leaves helps to quantify source strength. In order to reconstruct this initial architecture, rules equipped with allometric relations could be used: these allow predicting model parameters that are difficult to measure from simple traits that can be determined easily, non-destructively and directly in the orchard...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28202081/use-of-ethanol-extracts-of-terminalia-chebula-to-prevent-periodontal-disease-induced-by-dental-plaque-bacteria
#6
Jongsung Lee, Youn Hwa Nho, Seok Kyun Yun, Young Sun Hwang
BACKGROUND: The fruit of the Terminalia chebula tree has been widely used for the treatment of various disorders. Its anti-diabetic, anti-mutagenic, anti-oxidant, anti-bacterial, anti-fungal, and anti-viral effects have been studied. Dental plaque bacteria (DPB) are intimately associated with gingivitis and periodontitis. In the quest for materials that will prove useful in the treatment and prevention of periodontal disease, we investigated the preventive effects of an ethanol extract of Terminalia chebula (EETC) on DPB-induced inflammation and bone resorption...
February 16, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28201983/comparative-analysis-of-the-mitochondrial-genomes-of-colletotrichum-gloeosporioides-sensu-lato-insights-into-the-evolution-of-a-fungal-species-complex-interacting-with-diverse-plants
#7
Xiaofei Liang, Xianglin Tian, Wenkui Liu, Tingyu Wei, Wei Wang, Qiuyue Dong, Bo Wang, Yanan Meng, Rong Zhang, Mark L Gleason, Guangyu Sun
BACKGROUND: The fungal species complex Colletotrichum gloeosporioides sensu lato contains over 20 plant-interacting species. These species exhibit different life styles (e.g., endophytes, foliar and fruit pathogens) and show considerable variation in host and tissue adaptation strategies. Accurate species delimitation in C. gloeosporioides s.l. is very challenging due to nascent lineage boundaries and phenotypic plasticity, which strongly impedes studies of the complex's host-interaction biology...
February 15, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28193730/mismatch-repair-incompatibilities-in-diverse-yeast-populations
#8
Duyen T Bui, Anne Friedrich, Najla Al-Sweel, Gianni Liti, Joseph Schacherer, Charles F Aquadro, Eric Alani
An elevated mutation rate can provide cells with a source of mutations to adapt to changing environments. We identified a negative-epistatic interaction involving naturally occurring variants in the MLH1 and PMS1 mismatch repair (MMR) genes of Saccharomyces cerevisiae We hypothesized that this MMR incompatibility, created through mating between divergent S. cerevisiae, yields mutator progeny that can rapidly but transiently adapt to an environmental stress. Here we analyzed the MLH1 and PMS1 genes across 1,010 S...
February 13, 2017: Genetics
https://www.readbyqxmd.com/read/28185293/assessing-frost-damages-using-dynamic-models-in-walnut-trees-exposure-rather-than-vulnerability-controls-frost-risks
#9
Guillaume Charrier, Isabelle Chuine, Marc Bonhomme, Thierry Améglio
Frost damages develop when exposure overtakes frost vulnerability. Frost risk assessment therefore needs dynamic simulation of frost hardiness using temperature and photoperiod in interaction with developmental stage. Two models, including or not the effect of photoperiod were calibrated using five years of frost hardiness monitoring (2007-2012), in two locations (low and high elevation) for three walnut genotypes with contrasted phenology and maximum hardiness (Juglans regia cv Franquette, Juglans regia x nigra 'Early' and 'Late')...
February 9, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28185042/phylogenomic-relationship-of-feijoa-acca-sellowiana-o-berg-burret-with-other-myrtaceae-based-on-complete-chloroplast-genome-sequences
#10
Lilian Oliveira de Machado, Leila do Nascimento Vieira, Valdir Marcos Stefenon, Fábio de Oliveira Pedrosa, Emanuel Maltempi de Souza, Miguel Pedro Guerra, Rubens Onofre Nodari
Given their distribution, importance, and richness, Myrtaceae species comprise a model system for studying the evolution of tropical plant diversity. In addition, chloroplast (cp) genome sequencing is an efficient tool for phylogenetic relationship studies. Feijoa [Acca sellowiana (O. Berg) Burret; CN: pineapple-guava] is a Myrtaceae species that occurs naturally in southern Brazil and northern Uruguay. Feijoa is known for its exquisite perfume and flavorful fruits, pharmacological properties, ornamental value and increasing economic relevance...
February 9, 2017: Genetica
https://www.readbyqxmd.com/read/28179182/chloroplast-and-its-phylogenies-to-understand-the-evolutionary-history-of-southern-south-american-azorella-laretia-and-mulinum-azorelloideae-apiaceae
#11
Martina Fernández, Cecilia Ezcurra, Carolina I Calviño
Azorella, Laretia and Mulinum are taxonomically complex, and good candidates to study evolutionary radiations in the Andes and the importance of hybridizations. Previous phylogenetic studies of subfamily Azorelloideae agree that Azorella and Mulinum as currently conceived are not monophyletic, and hence a revision of their circumscription is necessary. However, these phylogenies were based only on chloroplast DNA sequence data. Here, phylogenetic relationships within Azorelloideae were inferred using sequence data from five chloroplast DNA (rps16 intron, trnQ-rps16, rps16-trnK(UUU) 5' -exon, trnG(GCC)-trnS(GCU) and rpL32-trnL(UAG)), and from nuclear rDNA ITS regions to assess the monophyly of Azorella and Mulinum and discuss generic re-circumscriptions, determine hybridization and radiation events, identify and characterize important lineages, and propose hypotheses on evolution of key morphological characters...
February 4, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28177805/effects-and-possible-mechanism-of-tea-tree-oil-against-botrytis-cinerea-and-penicillium-expansum-in-vitro-and-in-vivo-test
#12
Yonghua Li, Xingfeng Shao, Jiayu Xu, Yingying Wei, Feng Xu, Hongfei Wang
The purpose of this study was to investigate the antifungal activities and possible mechanisms of tea tree oil (TTO) against Botrytis cinerea and Penicillium expansum in vitro and in vivo. The results show that TTO exhibits dose-dependent antifungal activity against both pathogens, but P. expansum is less sensitive than B. cinerea to TTO not only in the in vitro test but also in artificially inoculated cherry fruits. TTO vapor treatment reduced the decay caused by these pathogens in inoculated cherry fruits, but the effect on P...
October 25, 2016: Canadian Journal of Microbiology
https://www.readbyqxmd.com/read/28168603/metschnikowia-persici-sp-nov-a-novel-protease-producing-yeast-species-from-china
#13
Chen Wang, Yang Liu, Tao-Tao Zhang, Cai-Ge Lu, Ya Liu, Dian-Peng Zhang, Wei-Cheng Liu
Three yeast strains, named as FHL-A, FHL-B, and FHL-C, were isolated from peach fruit surfaces collected from different regions in the North of China highly produced protease and were presented as single separate group in the genus Metschnikowia by sequence comparisons of 26S rRNA gene D1/D2 domain and internal transcribed spacer (ITS) region. BLASTn alignments on NCBI showed that the similarity of 26S rRNA gene sequences of the three strains to all sequences of other yeasts accessed into the GenBank/EMBL/DDBJ and other database was very low (≦93%)...
February 6, 2017: Current Microbiology
https://www.readbyqxmd.com/read/28166755/testing-the-potential-significance-of-different-scion-rootstock-genotype-combinations-on-the-ecology-of-old-cultivated-olive-trees-in-the-southeast-mediterranean-area
#14
Oz Barazani, Yoni Waitz, Yizhar Tugendhaft, Michael Dorman, Arnon Dag, Mohammed Hamidat, Thameen Hijawi, Zohar Kerem, Erik Westberg, Joachim W Kadereit
BACKGROUND: A previous multi-locus lineage (MLL) analysis of SSR-microsatellite data of old olive trees in the southeast Mediterranean area had shown the predominance of the Souri cultivar (MLL1) among grafted trees. The MLL analysis had also identified an MLL (MLL7) that was more common among rootstocks than other MLLs. We here present a comparison of the MLL combinations MLL1 (scion)/MLL7 (rootstock) and MLL1/MLL1 in order to investigate the possible influence of rootstock on scion phenotype...
February 6, 2017: BMC Ecology
https://www.readbyqxmd.com/read/28166300/impacts-of-human-related-practices-on-ommatissus-lybicus-infestations-of-date-palm-in-oman
#15
Khalifa M Al-Kindi, Paul Kwan, Nigel R Andrew, Mitchell Welch
Date palm cultivation is economically important in the Sultanate of Oman, with significant financial investments coming from both the government and private individuals. However, a widespread Dubas bug (DB) (Ommatissus lybicus Bergevin) infestation has impacted regions including the Middle East, North Africa, Southeast Russia, and Spain, resulting in widespread damages to date palms. In this study, techniques in spatial statistics including ordinary least squares (OLS), geographically weighted regression (GRW), and exploratory regression (ER) were applied to (a) model the correlation between DB infestations and human-related practices that include irrigation methods, row spacing, palm tree density, and management of undercover and intercropped vegetation, and (b) predict the locations of future DB infestations in northern Oman...
2017: PloS One
https://www.readbyqxmd.com/read/28163970/garcinia-subelliptica-merr-fukugi-a-multipurpose-coastal-tree-with-promising-medicinal-properties
#16
REVIEW
Tomomi Inoue, Mami Kainuma, Karin Baba, Nozomi Oshiro, Norimi Kimura, Eric Wei Chiang Chan
In this short review, the current knowledge on the botany, ecology, uses, and medicinal properties of the multipurpose Garcinia subelliptica (Fukugi) is updated. As yet, there are no reviews on this indigenous and heritage coastal tree species of the Ryukyu Islands in Japan, which has ethnocultural, ecological, and pharmacological significance. Planted by the Okinawan people some 300 years ago, Fukugi trees serve as windbreaks and accord protection against the destructive typhoons. The species has become a popular ornamental tree, and its bark has been used for dyeing fabrics...
January 2017: Journal of Intercultural Ethnopharmacology
https://www.readbyqxmd.com/read/28160377/novel-gene-sequence-markers-for-isolate-tracking-within-monilinia-fructicola-lesions
#17
M E Dowling, G Schnabel, H G Boatwright, S E Everhart
: Dowling, M.E., Schnabel, G., Boatwright, H.G., and Everhart, S.E. xxxx. Novel gene-sequence markers for isolate tracking within Monilinia fructicola lesions. Pest Management Science xxx:xxx-xxx. BACKGROUND: Monilinia fructicola is a diverse pathogen of pome and stone fruits that causes severe economic losses each year. However, little is known about inoculum flow within or between orchards and pathogen establishment in an orchard, because few methods exist for detecting diversity or tracking isolates over time...
February 3, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28158320/dispersal-limitation-of-tillandsia-species-correlates-with-rain-and-host-structure-in-a-central-mexican-tropical-dry-forest
#18
Elizabeth Victoriano-Romero, Susana Valencia-Díaz, Víctor Hugo Toledo-Hernández, Alejandro Flores-Palacios
Seed dispersal permits the colonization of favorable habitats and generation of new populations, facilitating escape from habitats that are in decline. There is little experimental evidence of the factors that limit epiphyte dispersion towards their hosts. In a tropical dry forest in central Mexico, we monitored the phenology of dispersion of epiphyte species of the genus Tillandsia; we tested experimentally whether precipitation could cause failures in seed dispersal and whether seed capture differs among vertical strata and between host species with high (Bursera copallifera) and low (Conzattia multiflora) epiphyte loads...
2017: PloS One
https://www.readbyqxmd.com/read/28142223/cryphonectria-parasitica-the-causal-agent-of-chestnut-blight-invasion-history-population-biology-and-disease-control
#19
Daniel Rigling, Simone Prospero
Chestnut blight, caused by Cryphonectria parasitica, is a devastating disease infecting American and European chestnut trees. The pathogen is native to East Asia and was spread to other continents via infected chestnut plants. This review summarizes the current state of research on this pathogen with a special emphasis on its interaction with a hyperparasitic mycovirus that acts as a biological control agent of chestnut blight. Taxonomy: Cryphonectria parasitica (Murr.) Barr. is a Sordariomycete (ascomycete) fungus in the family Cryphonetriaceae (Order Diaporthales)...
January 31, 2017: Molecular Plant Pathology
https://www.readbyqxmd.com/read/28139172/heat-exposure-and-productivity-in-orchards-implications-for-climate-change-research
#20
Grant Quiller, Jennifer Krenz, Kristie Ebi, Jeremy J Hess, Richard A Fenske, Paul D Sampson, Mengjie Pan, June T Spector
Recent studies suggest that heat exposure degrades work productivity, but such studies have not considered individual- and workplace-level factors. Forty-six tree fruit harvesters (98% Latino/a) from six orchards participated in a cross-sectional study in Central/Eastern Washington in 2015. The association between maximum measured work-shift Wet Bulb Globe Temperature (WBGTmax) and productivity (total weight of fruit bins collected per time worked) was estimated using linear mixed effects models, adjusting for relevant confounders...
January 31, 2017: Archives of Environmental & Occupational Health
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