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https://www.readbyqxmd.com/read/28541415/transcriptome-wide-identification-and-expression-analysis-of-divaricata-and-radialis-like-genes-of-the-mediterranean-orchid-orchis-italica
#1
Maria Carmen Valoroso, Sofia De Paolo, Giovanni Iazzetti, Serena Aceto
Bilateral symmetry of flowers is a relevant novelty that has occurred many times throughout the evolution of flowering plants. In Antirrhinum majus, establishment of flower dorso-ventral asymmetry is mainly due to interaction of TCP (CYC and DICH) and MYB (DIV, RAD and DRIF) transcription factors. In the present study, we characterized 8 DIV-, 4 RAD- and 2 DRIF-like genes from the transcriptome of Orchis italica, an orchid species with bilaterally symmetric and resupinate flowers. We found a similar number of DIV- and RAD-like genes within the genomes of Phalaenopsis equestris and Dendrobium catenatum orchids...
May 25, 2017: Genome Biology and Evolution
https://www.readbyqxmd.com/read/28540533/responses-of-euglossine-bees-hymenoptera-apidae-euglossina-to-an-edge-forest-gradient-in-a-large-tabuleiro-forest-remnant-in-eastern-brazil
#2
J A Coswosk, R A Ferreira, E D G Soares, L R R Faria
Euglossine fauna of a large remnant of Brazilian Atlantic forest in eastern Brazil (Reserva Natural Vale) was assessed along an edge-forest gradient towards the interior of the fragment. To test the hypotheses that the structure of assemblages of orchid bees varies along this gradient, the following predictions were evaluated: (i) species richness is positively related to distance from the forest edge, (ii) species diversity is positively related to distance from the edge, (iii) the relative abundance of species associated with forest edge and/or open areas is inversely related to the distance from edge, and (iv) relative abundance of forest-related species is positively related to distance from the edge...
May 24, 2017: Neotropical Entomology
https://www.readbyqxmd.com/read/28536987/sexual-deception-in-the-eucera-pollinated-ophrys-leochroma-a-chemical-intermediate-between-wasp-and-andrena-pollinated-species
#3
Monica Cuervo, Demetra Rakosy, Carlos Martel, Stefan Schulz, Manfred Ayasse
Ophrys flowers mimic sex pheromones of attractive females of their pollinators and attract males, which attempt to copulate with the flower and thereby pollinate it. Virgin females and orchid flowers are known to use the same chemical compounds in order to attract males. The composition of the sex pheromone and its floral analogue, however, vary between pollinator genera. Wasp-pollinated Ophrys species attract their pollinators by using polar hydroxy acids, whereas Andrena-pollinated species use a mixture of non-polar hydrocarbons...
May 23, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28533976/phylogenetic-climatic-niche-conservatism-and-evolution-of-climatic-suitability-in-neotropical-angraecinae-vandeae-orchidaceae-and-their-closest-african-relatives
#4
Marta Kolanowska, Elżbieta Grochocka, Kamil Konowalik
In the present study we investigate the concept of phylogenetic niche conservatism (PNC) within the American species of angraecoid orchids (Campylocentrum and Dendrophylax) and their closest relatives in the Old World (Angraecum) using ecological niche modelling (ENM). The predicted niche occupancy profiles were matched with the outcomes of previous phylogenetic studies to reconstruct the evolution of climatic suitability within the orchid group studied and evaluate the role of niche differentiation in the speciation of Angraecinae...
2017: PeerJ
https://www.readbyqxmd.com/read/28529835/a-new-set-of-microsatellite-primers-for-coelogyne-fimbriata-orchidaceae-and-cross-amplification-in-c-ovalis
#5
Wei-Chang Huang, Kai Jiang, Chao Hu, Yue-E Xiao, Barnabas C Seyler, Yuan-Yuan Li
PREMISE OF THE STUDY: Declining orchid populations have made it necessary to prioritize the study of population structure and genetic diversity for species including Coelogyne fimbriata (Orchidaceae). METHODS AND RESULTS: A biotin-streptavidin capture method was used to construct a microsatellite library for C. fimbriata. A total of 15 polymorphic nuclear microsatellite loci were isolated and characterized using 47 C. fimbriata individuals from two natural populations in China...
May 2017: Applications in Plant Sciences
https://www.readbyqxmd.com/read/28522861/comparative-analysis-of-dendrobium-plastomes-and-utility-of-plastomic-mutational-hotspots
#6
Niu Zhitao, Zhu Shuying, Pan Jiajia, Li Ludan, Sun Jing, Ding Xiaoyu
Dendrobium is one of the largest genera in Orchidaceae, comprising about 800-1500 species mainly distributed in tropical Asia, Australasia, and Australia. There are 74 species and two varieties of this genus in China. Because of their ornamental and commercial value, Dendrobium orchids have been studied at low taxonomic levels. However, structural changes and effective mutational hotspots of Dendrobium plastomes have rarely been documented. Here, 30 Dendrobium plastomes were compared, comprising 25 newly sequenced in this study and five previously published...
May 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28515737/the-complete-plastome-sequences-of-four-orchid-species-insights-into-the-evolution-of-the-orchidaceae-and-the-utility-of-plastomic-mutational-hotspots
#7
Zhitao Niu, Qingyun Xue, Shuying Zhu, Jing Sun, Wei Liu, Xiaoyu Ding
Orchidaceae (orchids) is the largest family in the monocots, including about 25,000 species in 880 genera and five subfamilies. Many orchids are highly valued for their beautiful and long-lasting flowers. However, the phylogenetic relationships among the five orchid subfamilies remain unresolved. The major dispute centers on whether the three one-stamened subfamilies, Epidendroideae, Orchidoideae, and Vanilloideae, are monophyletic or paraphyletic. Moreover, structural changes in the plastid genome (plastome) and the effective genetic loci at the species-level phylogenetics of orchids have rarely been documented...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28514600/evaluating-five-different-loci-rbcl-rpob-rpoc1-matk-and-its-for-dna-barcoding-of-indian-orchids
#8
Iffat Parveen, Hemant Kumar Singh, Saloni Malik, Saurabh Raghuvanshi, Shashi Bhushan Babbar
Orchidaceae, one of the largest families of angiosperms, is represented in India by 1600 species distributed in diverse habitats. Orchids are in high demand due to their beautiful flowers and therapeutic properties. Overexploitation and habitat destruction have made many orchid species endangered. In the absence of effective identification methods, illicit trade of orchids continues unabated. Considering DNA barcoding as a potential identification tool, species discrimination capability of five loci, ITS matK, rbcL, rpoB and rpoC1, was tested in 393 accessions of 94 Indian orchid species belonging to 47 genera, including one listed in Appendix I of CITES and 26 medicinal species...
May 17, 2017: Genome Génome / Conseil National de Recherches Canada
https://www.readbyqxmd.com/read/28510191/taxonomy-of-cyrtochilum-alliance-orchidaceae-in-the-light-of-molecular-and-morphological-data
#9
Dariusz L Szlachetko, Marta Kolanowska, Aleksandra Naczk, Marcin Górniak, Magdalena Dudek, Piotr Rutkowski, Guy Chiron
BACKGROUND: The generic separateness and specific composition of the orchid genus Cyrtochilum was discussed for almost two centuries. Over the years several smaller taxa were segregated from this taxon, but their separateness was recently questioned based on molecular studies outcomes. The aim of our study was to revise concepts of morphological-based generic delimitation in Cyrtochilum-alliance and to compare it with the results of genetic analysis. We used phylogenetic framework in combination with phenetical analysis to provide proposal of the generic delimitation within Cyrtochilum-alliance...
December 2017: Botanical Studies (Taipei, Taiwan)
https://www.readbyqxmd.com/read/28500473/orchid-bee-apidae-euglossini-communities-in-atlantic-forest-remnants-and-restored-areas-in-paran%C3%A3-state-brazil
#10
M C F Ferronato, D C Giangarelli, D Mazzaro, N Uemura, S H Sofia
In this study, we compare orchid bee communities surveyed in four forest remnants of the Atlantic Forest and four reforested areas characterized by seasonal semi-deciduous forest vegetation in different successional stages (mature and secondary vegetation), located in southern Brazil. The sizes of forest remnants and reforested areas varied from 32.1 to 583.9 ha and from 11.3 to 33.3 ha, respectively. All reforested areas were located near one forest remnant. During samplings, totaling nine per study area, euglossine males were attracted to eight scent baits and captured with bait trap and entomological nets...
May 13, 2017: Neotropical Entomology
https://www.readbyqxmd.com/read/28490318/integrated-mrna-and-microrna-transcriptome-variations-in-the-multi-tepal-mutant-provide-insights-into-the-floral-patterning-of-the-orchid-cymbidium-goeringii
#11
Fengxi Yang, Genfa Zhu, Zhen Wang, Hailin Liu, Qingquan Xu, Dan Huang, Chaoyi Zhao
BACKGROUND: Cymbidium goeringii is a very famous traditional orchid plant in China, which is well known for its spectacular and diverse flower morphology. In particular, the multi-tepal mutants have considerable ecological and cultural value. However, the current understanding of the molecular mechanisms of floral patterning and multi-tepal development is limited. In this study, we performed expression profiling of both microRNA (miRNA) and mRNA from wild-type and typical multi-tepal-mutant flowers of C...
May 11, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28488443/itraq-and-rna-seq-analyses-provide-new-insights-into-regulation-mechanism-of-symbiotic-germination-of-dendrobium-officinale-seeds-orchidaceae
#12
Juan Chen, Si Si Liu, Annegret Kohler, Bo Yan, Hong Mei Luo, Xiao Mei Chen, Shun Xing Guo
Mycorrhizal fungi colonize orchid seeds and induce germination. This so-called symbiotic germination is a critical developmental process in the lifecycle of all orchid species. However, the molecular changes that occur during orchid seed symbiotic germination remain largely unknown. To better understand the molecular mechanism of orchid seed germination, we performed a comparative transcriptomic and proteomic analysis of the Chinese traditional medicinal orchid Dendrobium officinale to explore the change in protein expression at the different developmental stages during asymbiotic and symbiotic germination and identify the key proteins that regulate the symbiotic germination of orchid seeds...
May 17, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28480003/are-body-size-and-volatile-blends-honest-signals-in-orchid-bees
#13
Brenda Jessica Arriaga-Osnaya, Jorge Contreras-Garduño, Francisco Javier Espinosa-García, Yolanda Magdalena García-Rodríguez, Miguel Moreno-García, Humberto Lanz-Mendoza, Héctor Godínez-Álvarez, Raúl Cueva Del Castillo
Secondary sexual traits may convey reliable information about males' ability to resist pathogens and that females may prefer those traits because their genes for resistance would be passed on to their offspring. In many insect species, large males have high mating success and can canalize more resources to the immune function than smaller males. In other species, males use pheromones to identify and attract conspecific mates, and thus, they might function as an honest indicator of a male's condition. The males of orchid bees do not produce pheromones...
May 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28470835/the-chemical-web-of-a-spider-orchid-sulfurous-semiochemicals-seduce-male-wasp-pollinator
#14
Björn Bohman, Ryan D Phillips, Gavin R Flematti, Russell A Barrow, Rod Peakall
One of the most intriguing natural observations is the pollination of orchids by sexual deception. Here, we identify floral semiochemicals from Caladenia (spider orchids) for the first time. We demonstrate that C. crebra, attracts its single pollinator species with a unique system of (methylthio)phenols, three of which are new natural products. Furthermore, the same compounds constitute the sex pheromone of the pollinator, the thynnine wasp Campylothynnus flavopictus, representing the first occurrence of sulfurous sex pheromones in Hymenoptera...
May 4, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28457004/colonization-strategy-of-the-endophytic-plant-growth-promoting-strains-of-pseudomonas-fluorescens-and-klebsiella-oxytoca-on-the-seeds-seedlings-and-roots-of-the-epiphytic-orchid-dendrobium-nobile-lindl
#15
Anastasia S Pavlova, Maria R Leontieva, Tatiana A Smirnova, Galina L Kolomeitseva, Alexander I Netrusov, Elena A Tsavkelova
AIMS: Orchids form strong mycorrhizal associations, but their interactions with bacteria are poorly understood. We aimed to investigate the distribution of plant growth promoting rhizobacteria at different stages of orchid development and to study if there is any selective specificity in choosing PGPR partners. METHODS AND RESULTS: Colonization patterns of gfp-tagged Pseudomonas fluorescens and Klebsiella oxytoca were studied on roots, seeds, and seedlings of Dendrobium nobile...
April 29, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28448202/current-progress-in-orchid-flowering-flower-development-research
#16
Hsin-Mei Wang, Chii-Gong Tong, Seonghoe Jang
Genetic pathways relevant to flowering of Arabidopsis are under the control of environmental cues such as day length and temperatures, and endogenous signals including phytohormones and developmental aging. However, genes and even regulatory pathways for flowering identified in crops show divergence from those of Arabidopsis and often do not have functional equivalents to Arabidopsis and/or existing species- or genus-specific regulators and show modified or novel pathways. Orchids are the largest, most highly evolved flowering plants, and form an extremely peculiar group of plants...
April 27, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28446922/corrigendum-building-a-genetic-manipulation-tool-box-for-orchid-biology-identification-of-constitutive-promoters-and-application-of-crispr-cas9-in-the-orchid-dendrobium-officinale
#17
Ling Kui, Haitao Chen, Weixiong Zhang, Simei He, Zijun Xiong, Yesheng Zhang, Liang Yan, Chaofang Zhong, Fengmei He, Junwen Chen, Peng Zeng, Guanghui Zhang, Shengchao Yang, Yang Dong, Wen Wang, Jing Cai
[This corrects the article on p. 2036 in vol. 7, PMID: 28127299.].
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28441996/abstracts-from-the-western-society-of-allergy-asthma-and-immunology-2017-annual-scientific-session-fairmont-orchid-big-island-hawaii-january-29-february-2-2017
#18
(no author information available yet)
No abstract text is available yet for this article.
May 1, 2017: Allergy and Asthma Proceedings:
https://www.readbyqxmd.com/read/28439457/pollinator-diversity-and-reproductive-success-of-epipactis-helleborine-l-crantz-orchidaceae-in-anthropogenic-and-natural-habitats
#19
Agnieszka Rewicz, Radomir Jaskuła, Tomasz Rewicz, Grzegorz Tończyk
BACKGROUND: Epipactis helleborine is an Eurasian orchid species which prefers woodland environments but it may also spontaneously and successfully colonise human-made artificial and disturbed habitats such as roadsides, town parks and gardens. It is suggested that orchids colonising anthropogenic habitats are characterised by a specific set of features (e.g., large plant size, fast flower production). However, as it is not well known how pollinator diversity and reproductive success of E...
2017: PeerJ
https://www.readbyqxmd.com/read/28439283/floral-mass-per-area-and-water-maintenance-traits-are-correlated-with-floral-longevity-in-paphiopedilum-orchidaceae
#20
Feng-Ping Zhang, Ying-Jie Yang, Qiu-Yun Yang, Wei Zhang, Tim J Brodribb, Guang-You Hao, Hong Hu, Shi-Bao Zhang
Floral longevity (FL) determines the balance between pollination success and flower maintenance. While a longer floral duration enhances the ability of plants to attract pollinators, it can be detrimental if it negatively affects overall plant fitness. Longer-lived leaves display a positive correlation with their dry mass per unit area, which influences leaf construction costs and physiological functions. However, little is known about the association among FL and floral dry mass per unit area (FMA) and water maintenance traits...
2017: Frontiers in Plant Science
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