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https://www.readbyqxmd.com/read/28650988/transcriptomic-analysis-to-uncover-genes-affecting-cold-resistance-in-the-chinese-honey-bee-apis-cerana-cerana
#1
Kai Xu, Qingsheng Niu, Huiting Zhao, Yali Du, Yusuo Jiang
The biological activity and geographical distribution of honey bees is strongly temperature-dependent, due to their ectothermic physiology. In China, the endemic Apis cerana cerana exhibits stronger cold hardiness than Western honey bees, making the former species important pollinators of winter-flowering plants. Although studies have examined behavioral and physiological mechanisms underlying cold resistance in bees, data are scarce regarding the exact molecular mechanisms. Here, we investigated gene expression in A...
2017: PloS One
https://www.readbyqxmd.com/read/28650521/jmj27-an-arabidopsis-h3k9-histone%C3%A2-demethylase-modulates-defense-against-pseudomonas-syringae%C3%A2-and%C3%A2-flowering%C3%A2-time
#2
Aditya Dutta, Pratibha Choudhary, Julie Caruana, Ramesh Raina
Histone methylation is known to dynamically regulate diverse developmental and physiological processes. Histone methyl marks are written by methyltransferases and erased by demethylases, and result in modification of chromatin structure to repress or activate transcription. However, little is known about how histone methylation may regulate defense mechanisms and flowering time in plants. Here we report characterization of JmjC DOMAIN-CONTAINING PROTEIN 27 (JMJ27), an Arabidopsis JHDM2 (JmjC domain-containing histone demethylase 2) family protein, which modulates defense against pathogens and flowering time...
June 26, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28650458/duplicated-pollen-pistil-recognition-loci-control-intraspecific-unilateral-incompatibility-in-brassica-rapa
#3
Yoshinobu Takada, Kohji Murase, Hiroko Shimosato-Asano, Takahiro Sato, Honoka Nakanishi, Keita Suwabe, Kentaro K Shimizu, Yong Pyo Lim, Seiji Takayama, Go Suzuki, Masao Watanabe
In plants, cell-cell recognition is a crucial step in the selection of optimal pairs of gametes to achieve successful propagation of progeny. Flowering plants have evolved various genetic mechanisms, mediated by cell-cell recognition, to enable their pistils to reject self-pollen, thus preventing inbreeding and the consequent reduced fitness of progeny (self-incompatibility, SI), and to reject foreign pollen from other species, thus maintaining species identity (interspecific incompatibility)(1). In the genus Brassica, the SI system is regulated by an S-haplotype-specific interaction between a stigma-expressed female receptor (S receptor kinase, SRK) and a tapetum cell-expressed male ligand (S locus protein 11, SP11), encoded by their respective polymorphic genes at the S locus(2-6)...
June 26, 2017: Nature Plants
https://www.readbyqxmd.com/read/28650332/nepeta-rtanjensis-lamiaceae-a-plant-endemic-to-the-balkans-phenolic-composition-antioxidant-activity-and-in-vitro-antigenotoxic-effects-in-triiodothyronine-induced-dna-damage-in-human-lymphocytes
#4
Jasna Bošnjak-Neumüller, Milena Radaković, Ninoslav Djelić, Branka Vuković-Gačić, Zora Dajić Stevanović, Stoimir Kolarević, Danijela Mišić, Milan Stanković, Jelena Knežević-Vukčević, Biljana Spremo-Potparević, Zoran Stanimirović
The success of antioxidant therapy in hyperthyroidism implies that disease is mediated by oxidative stress, which is known as one of the causing agents of ageing, degenerative diseases, and cancer. The main objective of our study was to determine possible protective effects of methanolic extract of N. rtanjensis in triiodothyronine (T3)-induced DNA breaks of human lymphocytes under in vitro conditions, based upon plant antioxidant capacity related to its phytochemical profile, mainly its polyphenolic complex...
March 2017: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28650217/a-new-outlook-on-sporadic-flowering-of-bamboo
#5
Rico Gamuyao, Keisuke Nagai, Motoyuki Ashikari, Stefan Reuscher
Moso bamboo (Phyllostachys edulis) is a temperate grass species with a tree-like habitus and an unusual reproduction strategy. While flowering is irregular and infrequent, new clonal bamboo shoots are established from an underground rhizome network during the spring season. In our previous study, we performed transcriptome analyses using bamboo shoot buds to understand the initiation of bamboo stem elongation. Interestingly, the expression profile in the shoot apical meristem (SAM) region of young bamboo shoots is similar to that of other plants...
June 26, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28650182/buried-layers-on-the-origins-rise-and-fall-of-stratification-theories
#6
Martin Wieser
This article presents a historical analysis of the origins, rise, and demise of theories of stratification (Schichtentheorien). Following their roots in the ancient metaphysical idea of the "great chain of being," Aristotle's scala naturae, the medieval "Jacob's ladder," and Leibniz's concept of the lex continua, I argue that theories of stratification represent the modern heir to the ancient cosmological idea of a harmonious, hierarchical, and unified universe. Theories of stratification reached their heyday during the interwar period within German academia, proliferating over a vast number of disciplines and rising to special prominence within personality psychology, feeding the hope for a unitary image of the world and of human beings, their biological and mental development, their social organization and cultural creations...
June 26, 2017: History of Psychology
https://www.readbyqxmd.com/read/28649348/no-evidence-for-adaptation-to-local-rhizobial-mutualists-in-the-legume-medicago-lupulina
#7
Tia L Harrison, Corlett W Wood, Isabela L Borges, John R Stinchcombe
Local adaptation is a common but not ubiquitous feature of species interactions, and understanding the circumstances under which it evolves illuminates the factors that influence adaptive population divergence. Antagonistic species interactions dominate the local adaptation literature relative to mutualistic ones, preventing an overall assessment of adaptation within interspecific interactions. Here, we tested whether the legume Medicago lupulina is adapted to the locally abundant species of mutualistic nitrogen-fixing rhizobial bacteria that vary in frequency across its eastern North American range...
June 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28649325/influence-of-pollen-limitation-and-inbreeding-depression-in-the-maintenance-of-incomplete-dichogamy-in-salvia-elegans
#8
Víctor Rosas-Guerrero, Diego Hernández, Eduardo Cuevas
The widespread presence of incomplete dichogamy (i.e., partial separation in time between male and female phases) in flowering plants is a long-standing question in floral evolution. In this study, we proposed four scenarios in which depending on the particular combination of pollen limitation and inbreeding depression, the presence of complete dichogamy, incomplete dichogamy, or adichogamy may be favored. Moreover, we evaluated the role of pollen limitation and inbreeding depression in a natural population of Salvia elegans to test the validity of our predicted scenarios...
June 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28649269/a-comprehensive-technique-for-artificial-hybridization-in-chickpea-cicer-arietinum
#9
Shweta Kalve, Million Tadege
BACKGROUND: Two crossing techniques for hybridization of chickpea have been reported and include pollination after emasculation and pollination without emasculation. Success of crossing with emasculation varied from 5 to 17%; while the success rate varied from 20 to 50% by pollination without emasculation. The important reason for the low success rate of the two procedures could be lack of detailed information on the flowering stages chosen for crossing together with the environment where plants grow...
2017: Plant Methods
https://www.readbyqxmd.com/read/28647924/comparative-expression-analysis-of-rice-and-arabidopsis-peroxiredoxin-genes-suggests-conserved-or-diversified-roles-between-the-two-species-and-leads-to-the-identification-of-tandemly-duplicated-rice-peroxiredoxin-genes-differentially-expressed-in-seeds
#10
Yun-Shil Gho, Sun-A Park, Sung-Ruyl Kim, Anil Kumar Nalini Chandran, Gynheung An, Ki-Hong Jung
BACKGROUND: Peroxiredoxins (PRXs) have recently been identified as plant antioxidants. Completion of various genome sequencing projects has provided genome-wide information about PRX genes in major plant species. Two of these -- Oryza sativa (rice) and Arabidopsis -- each have 10 PRX members. Although significant progress has been made in understanding their biological roles in Arabidopsis, those functions in rice, a model crop plant, have not been well studied. RESULTS: We performed a comparative expression analysis of rice and Arabidopsis PRXs...
December 2017: Rice
https://www.readbyqxmd.com/read/28647812/genetically-engineered-orange-petunias-on-the-market
#11
Hany Bashandy, Teemu H Teeri
Unauthorized genetically engineered orange petunias were found on the market. Genetic engineering of petunia was shown to lead to novel flower color some 20 years ago. Here we show that petunia lines with orange flowers, generated for scientific purposes, apparently found their way to petunia breeding programmes, intentionally or unintentionally. Today they are widely available, but have not been registered for commerce.
June 24, 2017: Planta
https://www.readbyqxmd.com/read/28647753/the-bee-the-flower-and-the-electric-field-electric-ecology-and-aerial-electroreception
#12
REVIEW
Dominic Clarke, Erica Morley, Daniel Robert
Bees and flowering plants have a long-standing and remarkable co-evolutionary history. Flowers and bees evolved traits that enable pollination, a process that is as important to plants as it is for pollinating insects. From the sensory ecological viewpoint, bee-flower interactions rely on senses such as vision, olfaction, humidity sensing, and touch. Recently, another sensory modality has been unveiled; the detection of the weak electrostatic field that arises between a flower and a bee. Here, we present our latest understanding of how these electric interactions arise and how they contribute to pollination and electroreception...
June 24, 2017: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/28647533/transport-properties-and-regulatory-roles-of-nitrogen-in-arbuscular-mycorrhizal-symbiosis
#13
REVIEW
Aiqun Chen, Mian Gu, Shuangshuang Wang, Jiadong Chen, Guohua Xu
Many terrestrial plants can form root symbiosis with beneficial microorganisms for enhancing uptake of mineral nutrients or increasing fitness to adverse environmental challenges. Arbuscular mycorrhizal (AM) symbiosis that is formed by AM fungi and the roots of vascular flowering plants is the most widespread mutualistic associations in nature. As a typical endosymbiosis, AM interactions involves the differentiation of both symbionts to create novel symbiotic interfaces within the root cells, and requires a continuous nutrient exchange between the two partners...
June 21, 2017: Seminars in Cell & Developmental Biology
https://www.readbyqxmd.com/read/28647186/bougainvillea-spectabilis-flowers-extract-protects-against-the-rotenone-induced-toxicity
#14
Omar M E Abdel-Salam, Eman R Youness, Nadia A Ahmed, Sayed A El-Toumy, Ahmed M A Souleman, Nermeen Shaffie, Dalia M Abouelfadl
OBJECTIVE: To investigate the effect of two extracts of Bougainvillea spectabilis (B. spectabilis) flowers with yellow and pink/purple on brain oxidative stress and neuronal damage caused in rats by systemic rotenone injection. METHODS: Rotenone 1.5 mg/kg was given three times per week alone or in combination with B. spectabilis flowers extracts (25 mg or 50 mg) via the subcutaneous route for 2 weeks. Brain concentrations of the lipid peroxidation marker malondialdehyde (MDA), reduced glutathione, nitric oxide (nitrite), the pro-inflammatory cytokine interleukin-1beta (Il-1β) as well as butyrylcholinesterase, and paraoxonase-1 (PON-1) activities, were determined...
May 2017: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/28646075/ben-rob-and-the-making-of-a-petunia-flower
#15
Jennifer A Lockhart
No abstract text is available yet for this article.
June 23, 2017: Plant Cell
https://www.readbyqxmd.com/read/28646074/divergence-of-the-floral-a-function-between-an-asterid-and-a-rosid-species
#16
Patrice Morel, Klaas Heijmans, Frederique Rozier, Jan Zethof, Sophy Chamot, Suzanne Rodrigues Bento, Aurelie Vialette-Guiraud, Pierre Chambrier, Trehin Christophe, Michiel Vandenbussche
The ABC model is widely used as a genetic framework for understanding floral development and evolution. In this model, the A-function is required for the development of sepals and petals and to antagonize the C-function in the outer floral whorls. In the rosid species Arabidopsis thaliana, the AP2-type AP2 transcription factor represents a major A-function protein, but how the A-function is encoded in other species is not well understood. Here we show that in the asterid species petunia (Petunia hybrida), AP2B/BLIND ENHANCER (BEN) confines the C-function to the inner petunia floral whorls, in parallel with the microRNA BLIND...
June 23, 2017: Plant Cell
https://www.readbyqxmd.com/read/28645920/common-garden-test-of-range-limits-as-predicted-by-a-species-distribution-model-in-the-annual-plant-mimulus-bicolor
#17
Andrea L Dixon, Jeremiah W Busch
PREMISE OF THE STUDY: Direct tests of a species distribution model (SDM) were used to evaluate the hypothesis that the northern and southern edges of Mimulus bicolor's geographical range are limited by temperature and precipitation. METHODS: Climatic suitability was predicted using an SDM informed only by temperature and precipitation variables. These predictions were tested by growing plants in growth chambers with temperature and watering treatments informed by weather stations characteristic of environments at the geographic center, edges, and outside the range...
June 2017: American Journal of Botany
https://www.readbyqxmd.com/read/28645249/comparative-transcriptomic-analysis-of-the-evolution-and-development-of-flower-size-in-saltugilia-polemoniaceae
#18
Jacob B Landis, Douglas E Soltis, Pamela S Soltis
BACKGROUND: Flower size varies dramatically across angiosperms, representing innovations over the course of >130 million years of evolution and contributing substantially to relationships with pollinators. However, the genetic underpinning of flower size is not well understood. Saltugilia (Polemoniaceae) provides an excellent non-model system for extending the genetic study of flower size to interspecific differences that coincide with variation in pollinators. RESULTS: Using targeted gene capture methods, we infer phylogenetic relationships among all members of Saltugilia to provide a framework for investigating the genetic control of flower size differences via RNA-Seq de novo assembly...
June 23, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28645035/ctab-induced-hierarchical-bismuth-microspheres-for-visible-light-photocatalytic-study
#19
Fengnan Zhang, Yan Zhao, Yawen Li, Gongjuan Wu, Jingzhe Zhao
Nanosheet constructed bismuth microspheres were prepared through an aqueous reduction approach in the presence of CTAB molecules, with initial formed BiOCl as the precursor and hydrazine hydrate as the reductant. The flower-like morphology and platelet units of BiOCl precursor determined the evolution of hierarchical Bi microspheres through a morphology-heredity process. Trisodium citrate was introduced to keep the Bi microspheres from oxidation, the high purity in composition are beneficial to eliminate the influence of bismuth oxides...
June 13, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28645033/acetic-acid-assisted-fabrication-of-hierarchical-flower-like-bi2o3-for-photocatalytic-degradation-of-sulfamethoxazole-and-rhodamine-b-under-solar-irradiation
#20
Yueping Bao, Teik-Thye Lim, Ziyi Zhong, Rong Wang, Xiao Hu
With the assistance of acetic acid (CH3COOH), a novel 3D flower-like Bi2O3 was synthesized via hydrothermal process followed by calcination. For the first time, the role of CH3COOH as a capping agent in the formation of flower-like structure was investigated. The as-prepared flower-like Bi2O3 had a high activity on the degradation of sulfamethoxazole (SMX) under simulated solar light irradiation due to the narrow band gap of 2.69eV, high percentage of β-Bi2O3 as well as high intensity of polar facets (120) and (200)...
May 23, 2017: Journal of Colloid and Interface Science
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