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https://www.readbyqxmd.com/read/28637212/survival-and-feeding-rates-of-four-aphid-species-hemiptera-aphididae-on-various-sucrose-concentrations-in-diets
#1
Gary J Puterka, Scott J Nicholson, W R Cooper
Different concentrations of sucrose were used to investigate how survival and feeding was affected in four species of aphids (Hemiptera: Aphididae). Seven sucrose concentrations were evaluated in feeding chambers fitted with parafilm membranes and infested with nymphs of Aphis glycines Matsumura, Diuraphis noxia Kurdjumov, Myzus persicae Sulzer, or Schizaphis graminum Rondani at 25 °C and a photoperiod of 14:10 (L:D) h. Survival on each diet was recorded 1, 3, 5, 7, 9, and 11 d. Diet volumes (μl) consumed and amounts of honeydew produced were then determined...
June 20, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28635630/development-of-a-high-density-snp-based-linkage-map-and-detection-of-qtl-for-%C3%AE-glucans-protein-content-grain-yield-per-spike-and-heading-time-in-durum-wheat
#2
Ilaria Marcotuli, Agata Gadaleta, Giacomo Mangini, Antonio Massimo Signorile, Silvana Addolorata Zacheo, Antonio Blanco, Rosanna Simeone, Pasqualina Colasuonno
High-density genetic linkage maps of crop species are particularly useful in detecting qualitative and quantitative trait loci for important agronomic traits and in improving the power of classical approaches to identify candidate genes. The aim of this study was to develop a high-density genetic linkage map in a durum wheat recombinant inbred lines population (RIL) derived from two elite wheat cultivars and to identify, characterize and correlate Quantitative Trait Loci (QTL) for β-glucan, protein content, grain yield per spike and heading time...
June 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28634329/long-days-enhance-recognition-memory-and-increase-insulin-like-growth-factor-2-in-the-hippocampus
#3
Adriano Dellapolla, Ian Kloehn, Harshida Pancholi, Ben Callif, David Wertz, Kayla E Rohr, Matthew M Hurley, Kimberly M Baker, Samer Hattar, Marieke R Gilmartin, Jennifer A Evans
Light improves cognitive function in humans; however, the neurobiological mechanisms underlying positive effects of light remain unclear. One obstacle is that most rodent models have employed lighting conditions that cause cognitive deficits rather than improvements. Here we have developed a mouse model where light improves cognitive function, which provides insight into mechanisms underlying positive effects of light. To increase light exposure without eliminating daily rhythms, we exposed mice to either a standard photoperiod or a long day photoperiod...
June 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28628949/photosynthate-partitioning-to-starch-in-arabidopsis-thaliana-is-insensitive-to-light-intensity-but-sensitive-to-photoperiod-due-to-a-restriction-on-growth-in-the-light-in-short-photoperiods
#4
Virginie Mengin, Eva-Theresa Pyl, Thiago Alexandre Moraes, Ronan Sulpice, Nicole Krohn, Beatrice Encke, Mark Stitt
Photoperiod duration can be predicted from previous days but irradiance fluctuates in an unpredictable manner. To investigate how allocation to starch responds to changes in these two environmental variables, Arabidopsis Col-0 was grown in a 6-h and a 12-h photoperiod at three different irradiances. The absolute rate of starch accumulation increased when photoperiod duration was shortened and when irradiance was increased. The proportion of photosynthate allocated to starch increased strongly when photoperiod duration was decreased but only slightly when irradiance was decreased...
June 19, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28628608/tcp4-dependent-induction-of-constans-transcription-requires-gigantea-in-photoperiodic-flowering-in-arabidopsis
#5
Akane Kubota, Shogo Ito, Jae Sung Shim, Richard S Johnson, Yong Hun Song, Ghislain Breton, Greg S Goralogia, Michael S Kwon, Dianne Laboy Cintrón, Tomotsugu Koyama, Masaru Ohme-Takagi, Jose L Pruneda-Paz, Steve A Kay, Michael J MacCoss, Takato Imaizumi
Photoperiod is one of the most reliable environmental cues for plants to regulate flowering timing. In Arabidopsis thaliana, CONSTANS (CO) transcription factor plays a central role in regulating photoperiodic flowering. In contrast to posttranslational regulation of CO protein, still little was known about CO transcriptional regulation. Here we show that the CINCINNATA (CIN) clade of class II TEOSINTE BRANCHED 1/ CYCLOIDEA/ PROLIFERATING CELL NUCLEAR ANTIGEN FACTOR (TCP) proteins act as CO activators. Our yeast one-hybrid analysis revealed that class II CIN-TCPs, including TCP4, bind to the CO promoter...
June 19, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28628238/a-genome-wide-association-study-of-23-agronomic-traits-in-chinese-wheat-landraces
#6
Yaxi Liu, Yu Lin, Shang Gao, Zhanyi Li, Jian Ma, Mei Deng, Guoyue Chen, Yuming Wei, Youliang Zheng
Uncovering the genetic basis of agronomic traits in wheat landraces is important for ensuring global food security via the development of improved varieties. Here, 723 wheat landraces from 10 Chinese agro-ecological zones were evaluated for 23 agronomic traits in six environments. All accessions could be clustered into five subgroups based on phenotypic data via discriminant function analysis, which was highly consistent with genotypic classification. A genome-wide association study was conducted for these traits using 52,303 DArT-seq markers to identify marker-trait associations and candidate genes...
June 19, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28620988/when-do-predatory-mites-phytoseiidae-attack-understanding-their-diel-and-seasonal-predation-patterns
#7
Consuelo Pérez-Sayas, Ernestina Aguilar-Fenollosa, Mónica A Hurtado, Josep A Jaques, Tatiana Pina
Predatory mites of the Phytoseiidae family are considered one of the most important groups of natural enemies used in biological control. The behavioral patterns of arthropods can differ greatly daily and seasonally; however, there is a lack of literature related to Phytoseiidae diel and seasonal predation patterns. The predatory activity of three phytoseiid species (two Tetranychidae-specialists, Phytoseiulus persimilis and Neoseiulus californicus, and one omnivore, Euseius stipulatus) that occur naturally in Spanish citrus orchards was observed under laboratory conditions in winter and summer...
June 16, 2017: Insect Science
https://www.readbyqxmd.com/read/28620256/effects-of-season-and-artificial-photoperiod-on-semen-and-seminal-plasma-characteristics-in-bucks-of-two-goat-breeds-maintained-in-a-semen-collection-center
#8
Francisco Arrebola, José-Alfonso Abecia
AIM: This study quantified the effects of season and photoperiodic treatment on semen and seminal plasma (SP) characteristics in 12 bucks of two Spanish goat breeds (Murciano-Granadina, and Payoya) for the past 1 year. MATERIALS AND METHODS: A total of 6 bucks (three of each breed) were exposed to the natural day length and the other six males (three of each breed) were exposed to alternating conditions of 2 months of long days (16 h light) and 2 months of short days (8 h light)...
May 2017: Veterinary World
https://www.readbyqxmd.com/read/28620087/daily-activity-of-the-housefly-musca-domestica-is-influenced-by-temperature-independent-of-3-utr-period-gene-splicing
#9
Olga Bazalova, David Dolezel
Circadian clocks orchestrate daily activity patterns and free running periods of locomotor activity under constant conditions. While the first often depends on temperature, the latter is temperature-compensated over a physiologically relevant range. Here, we explored the locomotor activity of the temperate housefly, Musca domestica Under low temperatures, activity was centered round a major and broad afternoon peak, while high temperatures resulted in activity throughout the photophase with a mild mid-day depression, which was especially pronounced in males exposed to long photoperiods...
June 15, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/28619669/sex-pheromone-in-the-moth-heliothis-virescens-is-produced-as-a-mixture-of-two-pools-de-novo-and-via-precursor-storage-in-glycerolipids
#10
Stephen P Foster, Karin G Anderson, Jérôme Casas
Most species of moths use a female-produced volatile sex pheromone, typically produced via de novo fatty acid synthesis in a specialized gland, for communication among mates. While de novo biosynthesis of pheromone (DNP) is rapid, suggesting transient precursor acids, substantial amounts of pheromone precursor (and other) acids are stored, predominantly in triacylglycerols in the pheromone gland. Whether these stored acids are converted to pheromone later or not has been the subject of some debate. Using a tracer/tracee approach, in which we fed female Heliothis virescens U-(13)C-glucose, we were able to distinguish two pools of pheromone, in which precursors were temporally separated (after and before feeding on labeled glucose): DNP synthesized from a mixed tracer/tracee acetyl CoA pool after feeding, and pheromone made from precursor acids primarily synthesized before feeding, which we call recycled precursor fat pheromone (RPP)...
June 12, 2017: Insect Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28619288/effects-of-exogenous-leptin-on-seasonal-reproductive-responses-to-interacting-environmental-cues-in-female-siberian-hamsters
#11
Allison M Bailey, Sandra J Legan, Vicky J Meretsky, Gregory E Demas
Animals living in temperate climates respond to environmental cues that signal current and future resource availability to ensure that energy resources are available to support reproduction. Siberian hamsters (Phodopus sungorus) undergo robust gonadal regression in short, winter-like photoperiods as well as in response to mild food restriction in intermediate photoperiods. The goal of the present study was to investigate whether leptin is a relevant metabolic signal in regulating gonadal regression in response to diminishing food availability...
June 12, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28618378/simultaneously-upgrading-biogas-and-purifying-biogas-slurry-using-cocultivation-of-chlorella-vulgaris-and-three-different-fungi-under-various-mixed-light-wavelength-and-photoperiods
#12
Weixing Cao, Xue Wang, Shiqing Sun, Changwei Hu, Yongjun Zhao
In order to purify biogas slurry and biogas simultaneously, three different fungi, Pleurotus geesteranus (P. geesteranus), Ganoderma lucidum (G. lucidum), and Pleurotus ostreatus (P. ostreatus) were pelletized with Chlorella vulgaris (C. vulgaris). The results showed that the optimal light wavelength ratio for red:blue was 5:5 for these three different fungi-assisted C. vulgaris, resulting in higher specific growth rate as well as nutrient and CO2 removal efficiency compared with other ratios. G. lucidum/C...
June 1, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28616659/isolation-and-functional-characterization-of-a-circadian-regulated-constans-homolog-gbco-from-ginkgo-biloba
#13
Jiaping Yan, Dun Mao, Xiaomeng Liu, Lanlan Wang, Feng Xu, Guiyuan Wang, Weiwei Zhang, Yongling Liao
This is the first report to clone and functionally characterize a flowering time gene GbCO in perennial gymnosperm Ginkgo biloba. GbCO complements the co mutant of Arabidopsis, restoring normal early flowering. CONSTANS (CO) is a central regulator of photoperiod pathway, which channels inputs from light, day length, and circadian clock to promote the floral transition. In order to understand the role of CO in gymnosperm Ginkgo biloba, which has a long juvenile phase (15-20 years), a CO homolog (GbCO) was isolated and characterized from G...
June 14, 2017: Plant Cell Reports
https://www.readbyqxmd.com/read/28614493/bipolar-disorders-is-there-an-influence-of-seasonality-or-photoperiod
#14
Andrea Aguglia, Antonio Borsotti, Giuseppe Maina
Objective: To increase understanding of the influence of photoperiod variation in patients with bipolar disorders. Methods: We followed a sample of Italian bipolar patients over a period of 24 months, focusing on inpatients. All patients admitted to the Psychiatric Inpatient Unit of San Luigi Gonzaga Hospital in Orbassano (Turin, Italy) between September 1, 2013 and August 31, 2015 were recruited. Sociodemographic and clinical data were collected. Results: Seven hundred and thirty patients were included...
June 12, 2017: Revista Brasileira de Psiquiatria
https://www.readbyqxmd.com/read/28611818/long-term-effects-of-red-and-blue-light-emitting-diodes-on-leaf-anatomy-and-photosynthetic-efficiency-of-three-ornamental-pot-plants
#15
Liang Zheng, Marie-Christine Van Labeke
Light quality critically affects plant development and growth. Development of light-emitting diodes (LEDs) enables the use of narrow band red and/or blue wavelengths as supplementary lighting in ornamental production. Yet, long periods under these wavelengths will affect leaf morphology and physiology. Leaf anatomy, stomatal traits, and stomatal conductance, leaf hydraulic conductance (Kleaf), and photosynthetic efficiency were investigated in three ornamental pot plants, namely Cordyline australis (monocot), Ficus benjamina (dicot, evergreen leaves), and Sinningia speciosa (dicot, deciduous leaves) after 8 weeks under LED light...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28610748/transgenerational-seasonal-timer-for-suppression-of-sexual-morph-production-in-the-pea-aphid-acyrthosiphon-pisum
#16
Naoki Matsuda, Takashi Kanbe, Shin-Ichi Akimoto, Hideharu Numata
Many aphid species switch reproductive modes seasonally, with the sexual generations appearing in autumn. Sexual generations are induced by short days. It has been reported that the appearance of sexual morphs is suppressed by a transgenerational factor (a seasonal timer) over several generations after hatching from overwintered eggs. The present study examined whether the seasonal timer measures the number of days from hatching or the number of generations from hatching using the pea aphid, Acyrthosiphon pisum Harris (Homoptera: Aphididae)...
June 10, 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/28608936/a-photo-responsive-f-box-protein-fof2-regulates-floral-initiation-by-promoting-flc-expression-in-arabidopsis
#17
Reqing He, Xinmei Li, Ming Zhong, Jindong Yan, Ronghuan Ji, Xu Li, Qin Wang, Dan Wu, Mengsi Sun, Dongying Tang, Jianzhong Lin, Hongyu Li, Bin Liu, Hongtao Liu, Xuanming Liu, Xiaoying Zhao, Chentao Lin
Floral initiation is regulated by various genetic pathways in response to light, temperature, hormones, and developmental status. However, the molecular mechanisms underlying the interactions between different genetic pathways are not fully understood. Here, we show that the photoresponsive gene FOF2 (F-box of flowering 2) negatively regulates flowering. FOF2 encodes a putative F-box protein that interacts specifically with ASK14, and its overexpression results in later flowering under both long-day and short-day photoperiods...
June 13, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28608154/neural-control-of-daily-and-seasonal-timing-of-songbird-migration
#18
Tyler J Stevenson, Vinod Kumar
Bird migration is one of most salient annual events in nature. It involves predictable seasonal movements between breeding and non-breeding habitats. Both circadian and circannual clocks are entrained by photoperiodic cues and time daily and seasonal changes in migratory physiology and behavior. This mini-review provides an update on daily and seasonal rhythms of migratory behavior, and examines the neuroendocrine and molecular pathways involved in the timing of migration in songbirds. Recent findings have identified key neural substrates, and suggest the involvement of multiple neuroendocrine regulatory systems in controlling seasonal states in migrants...
June 12, 2017: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/28606897/melatonin-attenuates-phenotypic-flexibility-of-energy-metabolism-in-a-photoresponsive-mammal-the-siberian-hamster
#19
Jan S Boratyński, Małgorzata Jefimow, Michał S Wojciechowski
The duration of melatonin (MEL) secretion conveys information about day length and initiates a cascade of seasonal phenotypic adjustments in photoresponsive mammals. With shortening days they cease reproduction, minimize energy expenditure, enhance thermoregulatory capacity and adjust functioning of the hypothalamic-pituitary-adrenal (HPA) axis to match the winter increase in energy demands. Within each season stress plays an important role in the flexible adjustments of a phenotype to environmental perturbations...
June 12, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28605726/the-exploration-of-monochromatic-near-infrared-led-improved-anoxygenic-photosynthetic-bacteria-rhodopseudomonas-sp-for-wastewater-treatment
#20
Xiang Qi, Yiwei Ren, Enling Tian, Xingzu Wang
The future wastewater treatment requires high-efficiency and energy-saving technology. Anoxygenic photosynthetic bacteria (APB) is deemed as an eco-friendly microorganism, which could be employed in wastewater treatment. Here, monochromatic near-infrared (MNIR) light emitting diode (LED) was used, and three key factors (light quality, light intensity and photoperiod) of it were analyzed by a response surface methodology (RSM) in APB wastewater treatment. The results showed that light quality was the biggest impact factor in APB wastewater treatment, and nearly 58...
June 3, 2017: Bioresource Technology
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