keyword
MENU ▼
Read by QxMD icon Read
search

Pollination

keyword
https://www.readbyqxmd.com/read/27933068/mapping-quantitative-trait-loci-controlling-high-iron-and-zinc-content-in-self-and-open-pollinated-grains-of-pearl-millet-pennisetum-glaucum-l-r-br
#1
Sushil Kumar, Charles T Hash, Nepolean Thirunavukkarasu, Govind Singh, Vengaldas Rajaram, Abhishek Rathore, Senthilvel Senapathy, Mahesh D Mahendrakar, Rattan S Yadav, Rakesh K Srivastava
Pearl millet is a multipurpose grain/fodder crop of the semi-arid tropics, feeding many of the world's poorest and most undernourished people. Genetic variation among adapted pearl millet inbreds and hybrids suggests it will be possible to improve grain micronutrient concentrations by selective breeding. Using 305 loci, a linkage map was constructed to map QTLs for grain iron [Fe] and zinc [Zn] using replicated samples of 106 pearl millet RILs (F6) derived from ICMB 841-P3 × 863B-P2. The grains of the RIL population were evaluated for Fe and Zn content using atomic absorption spectrophotometer...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27932421/myb89-transcription-factor-represses-seed-oil-accumulation
#2
Dong Li, Changyu Jin, Shaowei Duan, Yana Zhu, Shuanghui Qi, Kaige Liu, Chenhao Gao, Haoli Ma, Meng Zhang, Yuncheng Liao, Mingxun Chen
In many higher plants, seed oil accumulation is precisely controlled by intricate multi-level regulatory networks, among which transcriptional regulation mainly influences oil biosynthesis. In Arabidopsis, the master positive transcription factors, WRINKLED1 (WRI1) and LEAFY COTYLEDON1-LIKE (L1L), are important for seed oil accumulation. We found that an R2R3-MYB transcription factor, MYB89, was predominantly expressed in developing seeds during maturation. Oil and major fatty acid biosynthesis in seeds was significantly promoted by myb89-1 mutation and MYB89 knockdown; MYB89 was thus an important repressor during seed oil accumulation...
December 8, 2016: Plant Physiology
https://www.readbyqxmd.com/read/27929423/plant-responses-to-climate-change-the-case-study-of-betulaceae-and-poaceae-pollen-seasons-northern-italy-vignola-emilia-romagna
#3
Anna Maria Mercuri, Paola Torri, Rita Fornaciari, Assunta Florenzano
Aerobiological data have especially demonstrated that there is correlation between climate warming and the pollination season of plants. This paper focuses on airborne pollen monitoring of Betulaceae and Poaceae, two of the main plant groups with anemophilous pollen and allergenic proprieties in Northern Italy. The aim is to investigate plant responses to temperature variations by considering long-term pollen series. The 15-year aerobiological analysis is reported from the monitoring station of Vignola (located near Modena, in the Emilia-Romagna region) that had operated in the years 1990-2004 with a Hirst spore trap...
December 6, 2016: Plants (Basel, Switzerland)
https://www.readbyqxmd.com/read/27927999/elevated-temperature-drives-a-shift-from-selfing-to-outcrossing-in-the-insect-pollinated-legume-faba-bean-vicia-faba
#4
Jacob Bishop, Hannah E Jones, Donal M O'Sullivan, Simon G Potts
Climate change can threaten the reproductive success of plants, both directly, through physiological damage during increasingly extreme weather events, and indirectly, through disruption of plant-pollinator interactions. To explore how plant-pollinator interactions are modified by extreme weather, we exposed faba bean (Vicia faba) plants to elevated temperature for 5 d during flowering, simulating a heatwave. We then moved the plants to flight cages with either bumblebees or no pollinators, or to two field sites, where plants were enclosed in mesh bags or pollinated by wild insect communities...
December 7, 2016: Journal of Experimental Botany
https://www.readbyqxmd.com/read/27927994/the-acyl-activating-enzyme-phaae13-is-an-alternative-enzymatic-source-of-precursors-for-anthocyanin-biosynthesis-in-petunia-flowers
#5
Guoju Chen, Heping Liu, Qian Wei, Huina Zhao, Juanxu Liu, Yixun Yu
Anthocyanins, a class of flavonoids, are responsible for the orange to blue coloration of flowers and act as visual attractors to aid pollination and seed dispersal. Malonyl-CoA is the precursor for the formation of flavonoids and anthocyanins. Previous studies have suggested that malonyl-CoA is formed almost exclusively by acetyl-CoA carboxylase, which catalyzes the ATP-dependent formation of malonyl-CoA from acetyl-CoA and bicarbonate. In the present study, the full-length cDNA of Petunia hybrida acyl-activating enzyme 13 (PhAAE13), a member of clade VII of the AAE superfamily that encodes malonyl-CoA synthetase, was isolated...
December 7, 2016: Journal of Experimental Botany
https://www.readbyqxmd.com/read/27926923/deforestation-impacts-on-bat-functional-diversity-in-tropical-landscapes
#6
Rodrigo García-Morales, Claudia E Moreno, Ernesto I Badano, Iriana Zuria, Jorge Galindo-González, Alberto E Rojas-Martínez, Eva S Ávila-Gómez
Functional diversity is the variability in the functional roles carried out by species within ecosystems. Changes in the environment can affect this component of biodiversity and can, in turn, affect different processes, including some ecosystem services. This study aimed to determine the effect of forest loss on species richness, abundance and functional diversity of Neotropical bats. To this end, we identified six landscapes with increasing loss of forest cover in the Huasteca region of the state of Hidalgo, Mexico...
2016: PloS One
https://www.readbyqxmd.com/read/27925011/post-harvest-embryo-development-in-ginseng-seeds-increases-desiccation-sensitivity-and-narrows-the-hydration-window-for-cryopreservation
#7
E Han, E Popova, G Cho, S Park, S Lee, H W Pritchard, H H Kim
BACKGROUND: Despite its self-pollinating characteristics, Korean ginseng germplasm is mainly maintained in clonal gene banks as there is no defined approach to the long-term conservation of its seed, including the most appropriate stage of embryo development for storage. OBJECTIVE: The aim of this study was to reveal the effect of embryo development on desiccation tolerance and cryopreservation success in ginseng seeds. MATERIALS AND METHODS: Seeds of Korean ginseng (Panax ginseng C...
July 2016: Cryo Letters
https://www.readbyqxmd.com/read/27923989/metabolic-control-of-tobacco-pollination-by-sugars-and-invertases
#8
Marc Goetz, Anne Guivarc'h, Jörg Hirsche, Martin Andreas Bauerfeind, María-Cruz González, Tae Kyung Hyun, Seung Hee Eom, Dominique Chriqui, Thomas Engelke, Dominik K Großkinsky, Thomas Roitsch
Pollination in flowering plants is initiated by germination of pollen grains on stigmas followed by fast growth of pollen tubes representing highly energy-consuming processes. The symplastic isolation of pollen grains and tubes requires import of sucrose available in the apoplast. We show that the functional coupling of sucrose cleavage by invertases and uptake of the released hexoses by monosaccharide transporters are critical for pollination in tobacco. Transcript profiling, in situ hybridization and immunolocalization of extracellular invertases and two monosaccharide transporters in vitro and in vivo support the functional coupling in supplying carbohydrates for pollen germination and tube growth evidenced by spatiotemporally coordinated expression...
December 6, 2016: Plant Physiology
https://www.readbyqxmd.com/read/27920383/effects-of-fragmentation-on-plant-adaptation-to-urban-environments
#9
Jonathan Dubois, Pierre-Olivier Cheptou
Urban ecosystems are relatively recent and heavily human-altered terrestrial ecosystems with a surprisingly high diversity of animals, plants and other organisms. Urban habitats are also strongly fragmented and subject to higher temperatures, providing a compelling model for studying adaptation to global change. Crepis sancta (Asteraceae), an annual Mediterranean wasteland weed, occupies fragmented urban environments as well as certain unfragmented landscapes in southern France. We tested for shifts in dispersal, reproductive traits and size across a rural-urban gradient to learn whether and how selection may be driving changes in life history in urban and fragmented habitats...
January 19, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/27917318/disentangling-urban-habitat-and-matrix-effects-on-wild-bee-species
#10
Leonie K Fischer, Julia Eichfeld, Ingo Kowarik, Sascha Buchholz
In face of a dramatic decline of wild bee species in many rural landscapes, potential conservation functions of urban areas gain importance. Yet effects of urbanization on pollinators, and in particular on wild bees, remain ambiguous and not comprehensively understood. This is especially true for amenity grassland and extensively managed wastelands within large-scale residential housing areas. Using Berlin as a study region, we aimed to investigate (a) if these greenspaces are accepted by wild bee assemblages as foraging habitats; (b) how assemblage structure of bees and individual bee species are affected by different habitat (e...
2016: PeerJ
https://www.readbyqxmd.com/read/27916802/positive-and-negative-impacts-of-non-native-bee-species-around-the-world
#11
REVIEW
Laura Russo
Though they are relatively understudied, non-native bees are ubiquitous and have enormous potential economic and environmental impacts. These impacts may be positive or negative, and are often unquantified. In this manuscript, I review literature on the known distribution and environmental and economic impacts of 80 species of introduced bees. The potential negative impacts of non-native bees include competition with native bees for nesting sites or floral resources, pollination of invasive weeds, co-invasion with pathogens and parasites, genetic introgression, damage to buildings, affecting the pollination of native plant species, and changing the structure of native pollination networks...
November 28, 2016: Insects
https://www.readbyqxmd.com/read/27916528/repeated-inactivation-of-the-first-committed-enzyme-underlies-the-loss-of-benzaldehyde-emission-after-the-selfing-transition-in-capsella
#12
Claudia Sas, Frank Müller, Christian Kappel, Tyler V Kent, Stephen I Wright, Monika Hilker, Michael Lenhard
The enormous species richness of flowering plants is at least partly due to floral diversification driven by interactions between plants and their animal pollinators [1, 2]. Specific pollinator attraction relies on visual and olfactory floral cues [3-5]; floral scent can not only attract pollinators but also attract or repel herbivorous insects [6-8]. However, despite its central role for plant-animal interactions, the genetic control of floral scent production and its evolutionary modification remain incompletely understood [9-13]...
November 23, 2016: Current Biology: CB
https://www.readbyqxmd.com/read/27916524/gain-and-loss-of-floral-scent-production-through-changes-in-structural-genes-during-pollinator-mediated-speciation
#13
Avichai Amrad, Michel Moser, Therese Mandel, Michel de Vries, Robert C Schuurink, Loreta Freitas, Cris Kuhlemeier
The interactions of plants with their pollinators are thought to be a driving force in the evolution of angiosperms. Adaptation to a new pollinator involves coordinated changes in multiple floral traits controlled by multiple genes. Surprisingly, such complex genetic shifts have happened numerous times during evolution. Here we report on the genetic basis of the changes in one such trait, floral scent emission, in the genus Petunia (Solanaceae). The increase in the quantity and complexity of the volatiles during the shift from bee to hawkmoth pollination was due to de novo expression of the genes encoding benzoic acid/salicylic acid carboxyl methyltransferase (BSMT) and benzoyl-CoA:benzylalcohol/2-phenylethanol benzoyltransferase (BPBT) together with moderately increased transcript levels for most enzymes of the phenylpropanoid/benzenoid pathway...
November 22, 2016: Current Biology: CB
https://www.readbyqxmd.com/read/27916302/modelling-seasonal-effects-of-temperature-and-precipitation-on-honey-bee-winter-mortality-in-a-temperate-climate
#14
Matthew Switanek, Karl Crailsheim, Heimo Truhetz, Robert Brodschneider
Insect pollinators are essential to global food production. For this reason, it is alarming that honey bee (Apis mellifera) populations across the world have recently seen increased rates of mortality. These changes in colony mortality are often ascribed to one or more factors including parasites, diseases, pesticides, nutrition, habitat dynamics, weather and/or climate. However, the effect of climate on colony mortality has never been demonstrated. Therefore, in this study, we focus on longer-term weather conditions and/or climate's influence on honey bee winter mortality rates across Austria...
December 1, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27915467/the-physics-of-pollinator-attraction
#15
REVIEW
Edwige Moyroud, Beverley J Glover
Contents 1 I. 1 II. 1 III. 3 IV. 4 V. 4 4 References 5 SUMMARY: This Tansley Insight focuses on recent advances in our understanding of how flowers manipulate physical forces to attract animal pollinators and ensure reproductive success. Research has traditionally explored the role of chemical pigments and volatile organic compounds as cues for pollinators, but recent reports have demonstrated the importance of physical and structural means of pollinator attraction. Here we explore the role of petal microstructure in influencing floral light capture and optics, analysing colour, gloss and polarization effects...
December 4, 2016: New Phytologist
https://www.readbyqxmd.com/read/27914204/the-genetic-architecture-of-tristyly-and-its-breakdown-to-self-fertilization
#16
Ramesh Arunkumar, Wei Wang, Stephen I Wright, Spencer C H Barrett
The floral polymorphism tristyly involves three style morphs with a reciprocal arrangement of stigma and anther heights governed by two diallelic loci (S and M). Tristyly functions to promote cross-pollination, but modifications to stamen position commonly cause transitions to selfing. Here, we integrate whole genome sequencing and genetic mapping to investigate the genetic architecture of the M locus and the genetic basis of independent transitions to selfing in tristylous Eichhornia paniculata. We crossed independently derived semi-homostylous selfing variants of the long- and mid-styled morph fixed for alternate alleles at the M locus (ssmm and ssMM, respectively) and backcrossed the F1 to the parental ssmm genotype...
December 3, 2016: Molecular Ecology
https://www.readbyqxmd.com/read/27911369/field-experiments-of-pollination-ecology-the-case-of-lycoris-sanguinea-var-sanguinea
#17
Futa Yamaji, Takeshi A Ohsawa
Plant-pollinator interactions have been studied for approximately one hundred years. During that time, many field methods have been developed to clarify the pollination effectiveness of each pollinator for visited flowers. Pollinator observations have been one of the most common methods to identify pollinators, and bagging and cage experiments have been conducted to show the effectiveness of specific pollinators. In a previous study of Lycoris sanguinea var. sanguinea, its effective pollinators, the visitation frequencies of each floral visitor, and its reproductive strategies were not identified...
November 25, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27909440/introgressing-subgenome-components-from-brassica-rapa-and-b-carinata-to-b-juncea-for-broadening-its-genetic-base-and-exploring-intersubgenomic-heterosis
#18
Zili Wei, Meng Wang, Shihao Chang, Chao Wu, Peifa Liu, Jinling Meng, Jun Zou
Brassica juncea (A(j)A(j)B(j)B(j)), is an allotetraploid that arose from two diploid species, B. rapa (A(r)A(r)) and B. nigra (B(n)B(n)). It is an old oilseed crop with unique favorable traits, but the genetic improvement on this species is limited. We developed an approach to broaden its genetic base within several generations by intensive selection. The A(r) subgenome from the Asian oil crop B. rapa (A(r)A(r)) and the B(c) subgenome from the African oil crop B. carinata (B(c)B(c)C(c)C(c)) were combined in a synthesized allohexaploid (A(r)A(r)B(c)B(c)C(c)C(c)), which was crossed with traditional B...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27909301/genetic-architecture-and-evolution-of-the-s-locus-supergene-in-primula-vulgaris
#19
Jinhong Li, Jonathan M Cocker, Jonathan Wright, Margaret A Webster, Mark McMullan, Sarah Dyer, David Swarbreck, Mario Caccamo, Cock van Oosterhout, Philip M Gilmartin
Darwin's studies on heterostyly in Primula described two floral morphs, pin and thrum, with reciprocal anther and stigma heights that promote insect-mediated cross-pollination. This key innovation evolved independently in several angiosperm families. Subsequent studies on heterostyly in Primula contributed to the foundation of modern genetic theory and the neo-Darwinian synthesis. The established genetic model for Primula heterostyly involves a diallelic S locus comprising several genes, with rare recombination events that result in self-fertile homostyle flowers with anthers and stigma at the same height...
December 2, 2016: Nature Plants
https://www.readbyqxmd.com/read/27907097/levels-of-selected-persistent-organic-pollutants-pcb-pbde-and-pesticides-in-honey-bee-pollen-sampled-in-poland
#20
Marek Łukasz Roszko, Marta Kamińska, Krystyna Szymczyk, Renata Jędrzejczak
Chemical plant protection is a commonly discussed factor potentially responsible for decline in pollinators and other beneficial insect populations. Various groups of chemicals including persistent organic pollutants could impact a bee colony's welfare and are reported to be present in bee tissue and apiary products. The aim of this work was to evaluate the presence of selected persistent organic pollutant and pesticide residues in bee pollen originating from different geographical regions of Poland. Pesticide residues were identified in 60% of tested bee pollen samples...
2016: PloS One
keyword
keyword
56895
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"