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https://www.readbyqxmd.com/read/27912109/characterization-and-fine-mapping-of-a-novel-premature-leaf-senescence-mutant-yellow-leaf-and-dwarf-1-in-rice
#1
Luchang Deng, Peng Qin, Zhi Liu, Geling Wang, Weilan Chen, Jianhua Tong, Langtao Xiao, Bin Tu, Yuantao Sun, Wei Yan, Hang He, Jun Tan, Xuewei Chen, Yuping Wang, Shigui Li, Bingtian Ma
Leaves are the main organs in which photosynthates are produced. Leaf senescence facilitates the translocation of photosynthates and nutrients from source to sink, which is important for plant development and especially for crop yield. However, the molecular mechanism of leaf senescence is unknown. Here, we identified a mutant, yellow leaf and dwarf 1 (yld1), which exhibited decreased plant height and premature leaf senescence. Nitroblue tetrazolium and diamiobenzidine staining analyses revealed that the concentrations of reactive oxygen species were higher in yld1 leaves than in wild type leaves...
November 22, 2016: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/27909914/association-of-snp-variants-of-mhc-class-ii-drb-gene-with-thermo-physiological-traits-in-tropical-goats
#2
Abdulmojeed Yakubu, Adebowale E Salako, Marcos De Donato, Sunday O Peters, Michael I Takeet, Mathew Wheto, Moses Okpeku, Ikhide G Imumorin
Host defense in vertebrates depend on many secreted regulatory proteins such as major histocompatibility complex (MHC) class II which provide important regulatory and effector functions of T cells. Gene polymorphism in the second exon of Capra-DRB gene in three major Nigerian goat breeds [West African Dwarf (WAD), Red Sokoto (RS), and Sahel (SH)] was analyzed by restriction fragment length polymorphisms (RFLP). Four restriction enzymes, BsaHI, AluI, HaeIII, and SacII, were utilized. The association between the polymorphic sites and some heat tolerance traits were also investigated in a total of 70 WAD, 90 RS, and 50 SH goats...
December 1, 2016: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/27909443/mighty-dwarfs-arabidopsis-autoimmune-mutants-and-their-usages-in-genetic-dissection-of-plant-immunity
#3
REVIEW
Rowan van Wersch, Xin Li, Yuelin Zhang
Plants lack the adaptive immune system possessed by mammals. Instead they rely on innate immunity to defend against pathogen attacks. Genomes of higher plants encode a large number of plant immune receptors belonging to different protein families, which are involved in the detection of pathogens and activation of downstream defense pathways. Plant immunity is tightly controlled to avoid activation of defense responses in the absence of pathogens, as failure to do so can lead to autoimmunity that compromises plant growth and development...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27904466/genetic-similarity-between-cotton-leafroll-dwarf-virus-and-chickpea-stunt-disease-associated-virus-in-india
#4
Arup Kumar Mukherjee, Prasun Kumar Mukherjee, Sandhya Kranthi
The cotton leafroll dwarf virus (CLRDV) is one of the most devastating pathogens of cotton. This malady, known as cotton blue disease, is widespread in South America where it causes huge crop losses. Recently the disease has been reported from India. We noticed occurrence of cotton blue disease and chickpea stunt disease in adjoining cotton and chickpea fields and got interested in knowing if these two viral diseases have some association. By genetic studies, we have shown here that CLRDV is very close to chickpea stunt disease associated virus (CpSDaV)...
December 2016: Plant Pathology Journal
https://www.readbyqxmd.com/read/27903776/social-bond-strength-influences-vocally-mediated-recruitment-to-mobbing
#5
Julie M Kern, Andrew N Radford
Strong social bonds form between individuals in many group-living species, and these relationships can have important fitness benefits. When responding to vocalizations produced by groupmates, receivers are expected to adjust their behaviour depending on the nature of the bond they share with the signaller. Here we investigate whether the strength of the signaller-receiver social bond affects response to calls that attract others to help mob a predator. Using field-based playback experiments on a habituated population of wild dwarf mongooses (Helogale parvula), we first demonstrate that a particular vocalization given on detecting predatory snakes does act as a recruitment call; receivers were more likely to look, approach and engage in mobbing behaviour than in response to control close calls...
November 2016: Biology Letters
https://www.readbyqxmd.com/read/27900587/phylogenetic-analysis-of-wheat-dwarf-virus-isolates-from-iran
#6
Mohamad Hamed Ghodoum Parizipour, Jörg Schubert, Seyed Ali Akbar Behjatnia, Alireza Afsharifar, Antje Habekuß, Beilei Wu
Wheat dwarf virus (WDV) adversely affects cereal production in Asia, Europe, and North Africa. In this study, sequences of several WDV isolates from Iran which is located in the Fertile Crescent were analyzed. Analysis revealed a new geographic cluster for WDV-Wheat from Iran. Recombination analysis demonstrated the existence of several breakpoints in different regions of the viral genome. Data analysis demonstrated that WDV-Barley has an older history and lower diversity than WDV-Wheat. Sequence analysis identified a rare occasion of a co-infection of wheat with WDV-Wheat and WDV-Barley...
November 30, 2016: Virus Genes
https://www.readbyqxmd.com/read/27900537/rnai-mediated-resistance-to-rice-black-streaked-dwarf-virus-in-transgenic-rice
#7
Mohamed M S Ahmed, Shiquan Bian, Muyue Wang, Jing Zhao, Bingwei Zhang, Qiaoquan Liu, Changquan Zhang, Shuzhu Tang, Minghong Gu, Hengxiu Yu
Rice black-streaked dwarf virus (RBSDV), a member of the genus Fijivirus in the family Reoviridae, causes significant economic losses in rice production in China and many other Asian countries. Development of resistant varieties by using conventional breeding methods is limited, as germplasm with high level of resistance to RBSDV have not yet been found. One of the most promising methods to confer resistance against RBSDV is the use of RNA interference (RNAi) technology. RBSDV non-structural protein P7-2, encoded by S7-2 gene, is a potential F-box protein and involved in the plant-virus interaction through the ubiquitination pathway...
November 30, 2016: Transgenic Research
https://www.readbyqxmd.com/read/27895225/loss-of-inositol-phosphorylceramide-sphingolipid-mannosylation-induces-plant-immune-responses-and-reduces-cellulose-content-in-arabidopsis
#8
Lin Fang, Toshiki Ishikawa, Emilie A Rennie, Gosia M Murawska, Jeemeng Lao, Jingwei Yan, Alex Yl Tsai, Edward E K Baidoo, Jun Xu, Jay D Keasling, Taku Demura, Maki Kawai-Yamada, Henrik Vibe Scheller, Jenny C Mortimer
Glycosylinositol phosphorylceramides (GIPCs) are a class of glycosylated sphingolipids found in plants, fungi, and protozoa. These lipids are abundant in the plant plasma membrane, forming ~25% of total plasma membrane lipids. Little is known about the function of the glycosylated headgroup, but two recent studies have indicated that they play a key role in plant signaling and defense. Here, we show that a member of glycosyltransferase (GT) family 64, previously named ECTOPICALLY PARTING CELLS1 (EPC1), is likely a Golgi-localized GIPC-specific mannosyl-transferase, which we renamed GIPC MANNOSYL-TRANSFERASE1 (GMT1)...
November 28, 2016: Plant Cell
https://www.readbyqxmd.com/read/27894400/genetic-diversity-of-the-dwarf-honeybee-apis-florea-fabricius-1787-populations-based-on-microsatellite-markers
#9
N Asadi, A Rahimi, M Ghaheri, D Kahrizi, M Bagheri Dehbaghi, S Khederzadeh, M H Banabazi, S Esmaeilkhanian, B Veisi, M Geravandi, H Karim, S Vaziri, F Daneshgar, J Zargooshi
Apis florea is one of two species of small, wild honeybee. The present study was conducted to evaluate the genetic diversity of Apis florea honeybee from 48 nests (colonies) using microsatellite markers in the South of Iran. All honeybee samples were analyzed for six microsatellite loci (A88, A107, A7, B124, A113 and A35). The six loci had different numbers of alleles in the sampled colonies ranging from 7 (loci A107) to 3 (loci A7, A35). Gene diversity in Apis florea ranged from 0.491 to 0.595. This range probably reflects the spreading of nests in a large region with a varied climate...
October 31, 2016: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/27891124/a-novel-cell-type-enables-b-subtilis-to-escape-from-unsuccessful-sporulation-in-minimal-medium
#10
Hervé Joël Defeu Soufo
Sporulation is the most enduring survival strategy developed by several bacterial species. However, spore development of the model organism Bacillus subtilis has mainly been studied by means of media or conditions optimized for the induction of sporogenesis. Here, I show that during prolonged growth during stationary phase in minimal medium, B. subtilis undergoes an asymmetric cell division that produces small and round-shaped, DNA containing cells. In contrast to wild-type cells, mutants harboring spo0A or spoIIIE/sftA double mutations neither sporulate nor produce this special cell type, providing evidence that the small round cells emerge from the abortion of endospore formation...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27890406/cutaneous-histiocytic-sarcoma-with-regional-lymph-node-metastasis-in-a-netherland-dwarf-rabbit-oryctolagus-cuniculus
#11
M R Karim, T Izawa, M Pervin, H Sasai, M Kuwamura, J Yamate
A 10-year-old male Netherland dwarf rabbit (Oryctolagus cuniculus) was presented with a red nodular mass (1 cm in diameter) with ulceration and hair loss in the skin of the left upper lip. Cytological examination revealed atypical round cells. The mass was excised surgically. Histologically, the mass was composed of large round to polyhedral neoplastic cells with marked cytological atypia. The neoplastic cells were often binucleated or multinucleated. Immunohistochemically, the neoplastic cells were intensely positive for Iba1 and vimentin, but fewer neoplastic cells expressed E-cadherin...
November 24, 2016: Journal of Comparative Pathology
https://www.readbyqxmd.com/read/27889517/rice-pectin-methylesterase-inhibitor28-ospmei28-encodes-a-functional-pmei-and-its-overexpression-results-in-a-dwarf-phenotype-through-increased-pectin-methylesterification-levels
#12
Hong Phuong Nguyen, Ho Young Jeong, Seung Ho Jeon, Donghyuk Kim, Chanhui Lee
Pectin methylesterases (PMEs, EC 3.1.1.11) belonging to carbohydrate esterase family 8 cleave the ester bond between a galacturonic acid and an methyl group and the resulting change in methylesterification level plays an important role during the growth and development of plants. Optimal pectin methylesterification status in each cell type is determined by the balance between PME activity and post-translational PME inhibition by PME inhibitors (PMEIs). Rice contains 49 PMEIs and none of them are functionally characterized...
November 18, 2016: Journal of Plant Physiology
https://www.readbyqxmd.com/read/27888127/characterization-of-small-interfering-rnas-derived-from-rice-black-streaked-dwarf-virus-in-infected-maize-plants-by-deep-sequencing
#13
Mingjun Li, Yongqiang Li, Zihao Xia, Dianping Di, Aihong Zhang, Hongqin Miao, Tao Zhou, Zaifeng Fan
Rice black streaked dwarf virus (RBSDV) is the casual agent of maize rough dwarf disease, which frequently causes severe yield loss in China. However, the interaction between RBSDV and maize plants is largely unknown. RNA silencing is a conserved mechanism against viruses in plants. To understand the antiviral RNA interfering response in RBSDV-infected plants, the profile of virus-derived small interfering RNAs (vsiRNAs) from RBSDV in infected maize plants was obtained by deep sequencing in this study. Our data showed that vsiRNAs, accumulated preferentially as 21- and 22-nucleotide (nt) species, were mapped against all 10 genomic RNA segments of RBSDV and derived almost equally overall from both positive and negative strands, while there were significant differences in the accumulation level of vsiRNAs from segments 2, 4, 6, 7 and 10...
November 22, 2016: Virus Research
https://www.readbyqxmd.com/read/27872859/mapping-qtls-for-fertility-restoration-of-different-cytoplasmic-male-sterility-types-in-rice-using-two-oryza-sativa-%C3%A3-o-rufipogon-backcross-inbred-line-populations
#14
Biao-Lin Hu, Jian-Kun Xie, Yong Wan, Jin-Wei Zhang, Fan-Tao Zhang, Xia Li
Hybrid rice breeding using cytoplasmic male sterility/fertility restoration (CMS/Rf) systems plays an important role in ensuring global food security. Two backcross inbred line (BIL) populations derived from either Xieqingzao B (XB)//XB/Dongxiang wild rice (DWR) (XXD) or XB//DWR/XB (XDX) were used to detect quantitative trait loci (QTLs) for fertility restoration of Dwarf wild abortive- (DA-), Indonesia Paddy- (ID-), and DWR-type CMS in rice. Lines with ID- and DA-type CMS were testcrossed with both the XXD- and XDX-BILs, while the line with DWR-type CMS was testcrossed with the XDX-BILs only...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27866225/characterization-of-a-common-wheat-triticum-aestivum-l-high-tillering-dwarf-mutant
#15
Tao Xu, Nengfei Bian, Mingxing Wen, Jin Xiao, Chunxia Yuan, Aizhong Cao, Shouzhong Zhang, Xiue Wang, Haiyan Wang
A novel high-tillering dwarf mutant in common wheat Wangshuibai was characterized and mapped to facilitate breeding for plant height and tiller and the future cloning of the causal gene. Tiller number and plant height are two major agronomic traits in cereal crops affecting plant architecture and grain yield. NAUH167, a mutant of common wheat landrace Wangshuibai induced by ethylmethyl sulfide (EMS) treatment, exhibits higher tiller number and reduced plant height. Microscope observation showed that the dwarf phenotype was attributed to the decrease in the number of cells and their length...
November 19, 2016: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/27865843/methylation-effect-on-ipt5b-gene-expression-determines-cytokinin-biosynthesis-in-apple-rootstock
#16
Yi Feng, Xinzhong Zhang, Ting Wu, Xuefeng Xu, Zhenhai Han, Yi Wang
The molecular mechanism of dwarfing in the apple rootstock is poorly understood, and has been attributed to low root cytokinin biosynthesis levels. Here we identified differences in root trans-zeatin content and expression of cytokinin metabolic pathway genes between dwarfing and vigorous rootstocks. Specifically, a stable low expression of IPT5b was identified in the dwarfing rootstocks. Bisulfite sequencing showed that two CpG islands (CpG2 and CpG4) in the IPT5b promoter region showed higher methylation levels in the M9 rootstock (dwarfing) compared to the Mr (vigorous) rootstock...
November 16, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27857796/dwarf-with-dual-spinal-kyphotic-deformity-at-the-cervical-and-dorsal-spine-unassociated-with-odontoid-hypoplasia-surgical-management
#17
Guru Dutta Satyarthee, Dipanker Singh Mankotia
Morquio's syndrome is associated with systemic skeletal hypoplasia leading to generalized skeletal deformation. The hypoplasia of odontoid process is frequent association, which is responsible for atlantoaxial dislocation causing compressive myelopathy. However, development of sub-axial cervical kyphotic deformity unassociated with odontoid hypoplasia is extremely rare, and coexistence of dorsal kyphotic deformity is not reported in the western literature till date and represents first case. Current case is 16-year-old boy, who presented with severe kyphotic deformity of cervical spine with spastic quadriparesis...
July 2016: Journal of Pediatric Neurosciences
https://www.readbyqxmd.com/read/27853604/hibernation-in-a-primate-does-sleep-occur
#18
Marina B Blanco, Kathrin H Dausmann, Sheena L Faherty, Peter Klopfer, Andrew D Krystal, Robert Schopler, Anne D Yoder
During hibernation, critical physiological processes are downregulated and thermogenically induced arousals are presumably needed periodically to fulfil those physiological demands. Among the processes incompatible with a hypome tabolic state is sleep. However, one hibernating primate, the dwarf lemur Cheirogaleus medius, experiences rapid eye movement (REM)-like states during hibernation, whenever passively reaching temperatures above 30°C, as occurs when it hibernates in poorly insulated tree hollows under tropical conditions...
August 2016: Royal Society Open Science
https://www.readbyqxmd.com/read/27852761/androgen-responses-to-reproductive-competition-of-males-pursuing-either-fixed-or-plastic-alternative-reproductive-tactics
#19
Corinna von Kuerthy, Albert F H Ros, Michael Taborsky
Alternative reproductive tactics (ARTs), which can be plastic or fixed for life, may be characterized by distinct hormonal profiles. The relative plasticity hypothesis predicts flexible androgen regulation for adult males pursuing plastic tactics, but a less flexible regulation for males using a fixed tactic throughout life. Furthermore, androgen profiles may respond to changes in the social environment, as predicted by the social reciprocity models of hormone/behaviour interactions. The cichlid fish Lamprologus callipterus provides a rare opportunity to study the roles of androgens for male ARTs within a single species, because fixed and plastic ARTs coexist...
November 15, 2016: Journal of Experimental Biology
https://www.readbyqxmd.com/read/27851957/conserved-tetramer-junction-in-the-kinetochore-ndc80-complex
#20
Roberto Valverde, Jessica Ingram, Stephen C Harrison
The heterotetrameric Ndc80 complex establishes connectivity along the principal longitudinal axis of a kinetochore. Its two heterodimeric subcomplexes, each with a globular end and a coiled-coil shaft, connect end-to-end to create a ∼600 Å long rod spanning the gap from centromere-proximal structures to spindle microtubules. Neither subcomplex has a known function on its own, but the heterotetrameric organization and the characteristics of the junction are conserved from yeast to man. We have determined crystal structures of two shortened ("dwarf") Ndc80 complexes that contain the full tetramer junction and both globular ends...
November 15, 2016: Cell Reports
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