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https://www.readbyqxmd.com/read/29147724/glabrous-cmgl-encodes-a-hd-zip-iv-transcription-factor-playing-roles-in-multicellular-trichome-initiation-in-melon
#1
Huayu Zhu, Xiaofen Sun, Qi Zhang, Pengyao Song, Qianmei Hu, Xiaojing Zhang, Xiang Li, Jianbin Hu, Junsong Pan, Shouru Sun, Yiqun Weng, Luming Yang
Map-based cloning identified CmGL that encodes a HD-ZIP type IV transcription factor that controls multicellular trichome initiation in melon. Trichomes are small hairs covering the aerial parts of plants that originate from the epidermal cells, which can protect plants against the damage by insects and pathogens. The regulatory pathway of unicellular trichomes has been well studied in the model plant Arabidopsis. Little is known about the genetic control and regulation of trichome development in melon (Cucumis melo L...
November 17, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29129534/mechanical-shielding-of-rapidly-growing-cells-buffers-growth-heterogeneity-and-contributes-to-organ-shape-reproducibility
#2
Nathan Hervieux, Satoru Tsugawa, Antoine Fruleux, Mathilde Dumond, Anne-Lise Routier-Kierzkowska, Tamiki Komatsuzaki, Arezki Boudaoud, John C Larkin, Richard S Smith, Chun-Biu Li, Olivier Hamant
A landmark of developmental biology is the production of reproducible shapes, through stereotyped morphogenetic events. At the cell level, growth is often highly heterogeneous, allowing shape diversity to arise. Yet, how can reproducible shapes emerge from such growth heterogeneity? Is growth heterogeneity filtered out? Here, we focus on rapidly growing trichome cells in the Arabidopsis sepal, a reproducible floral organ. We show via computational modeling that rapidly growing cells may distort organ shape...
November 20, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/29117529/arabidopsis-leaf-trichomes-as-acoustic-antennae
#3
Shaobao Liu, Jiaojiao Jiao, Tian Jian Lu, Feng Xu, Barbara G Pickard, Guy M Genin
The much studied plant Arabidopsis thaliana has been reported recently to react to the sounds of caterpillars of Pieris rapae chewing on its leaves by promoting synthesis of toxins that can deter herbivory. Identifying participating receptor cells-potential "ears"-of Arabidopsis is critical to understanding and harnessing this response. Motivated in part by other recent observations that Arabidopsis trichomes (hair cells) respond to mechanical stimuli such as pressing or brushing by initiating potential signaling factors in themselves and in the neighboring skirt of cells, we analyzed the vibrational responses of Arabidopsis trichomes to test the hypothesis that trichomes can respond acoustically to vibrations associated with feeding caterpillars...
November 7, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/29116330/identification-and-mapping-of-ts-tender-spines-a-gene-involved-in-soft-spine-development-in-cucumis-sativus
#4
Chunli Guo, Xuqin Yang, Yunli Wang, Jingtao Nie, Yi Yang, Jingxian Sun, Hui Du, Wenying Zhu, Jian Pan, Yue Chen, Duo Lv, Huanle He, Hongli Lian, Junsong Pan, Run Cai
Using map-based cloning of ts gene, we identified a new sort of gene involved in the initiation of multicellular tender spine in cucumber. The cucumber (Cucumis sativus L.) fruit contains spines on the surface, which is an extremely valuable quality trait affecting the selection of customers. In this study, we elaborated cucumber line NC072 with wild type (WT) hard fruit spines and its spontaneous mutant NC073, possessing tender and soft spines on fruits. The mutant trait was named as tender spines (ts), which is controlled by a single recessive nuclear gene...
November 7, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29110545/serum-from-ccl4-induced-acute-rat-injury-model-induces-differentiation-of-adscs-towards-hepatic-cells-and-reduces-liver-fibrosis
#5
Maria Tayyab Baig, Gibran Ali, Sana Javaid Awan, Umara Shehzad, Azra Mehmood, Sadia Mohsin, Shaheen N Khan, Sheikh Riazuddin
Cellular therapies hold promise to alleviate liver diseases. This study explored the potential of allogenic serum isolated from rat with acute CCl4 injury to differentiate adipose derived stem cells (ADSCs) towards hepatic lineage. Acute liver injury was induced by CCl4 which caused significant increase in serum levels of VEGF, SDF1α and EGF. ADSCs were preconditioned with 3% serum isolated from normal and acute liver injury models. ADSCs showed enhanced expression of hepatic markers (AFP, albumin, CK8 and CK19)...
November 7, 2017: Growth Factors
https://www.readbyqxmd.com/read/29105766/the-cotton-gossypium-hirsutum-nac-transcription-factor-fsn1-as-a-positive-regulator-participates-in-controlling-secondary-cell-wall-biosynthesis-and-modification-of-fibers
#6
Jie Zhang, Geng-Qing Huang, Dan Zou, Jing-Qiu Yan, Yang Li, Shan Hu, Xue-Bao Li
Cotton (Gossypium hirsutum) fibers are the highly elongated and thickened single-cell trichomes on the seed epidermis. However, little is known about the molecular base of fiber cell wall thickening in detail. In this study, a cotton NAC transcription factor (GhFSN1) that is specifically expressed in secondary cell wall (SCW) thickening fibers was functionally characterized. The GhFSN1 transgenic cotton plants were generated to study how FSN1 regulates fiber SCW formation. Up-regulation of GhFSN1 expression in cotton resulted in an increase in SCW thickness of fibers but a decrease in fiber length...
November 6, 2017: New Phytologist
https://www.readbyqxmd.com/read/29103938/etiolated-seedling-development-requires-repression-of-photomorphogenesis-by-a-small-cell-wall-derived-dark-signal
#7
Scott A Sinclair, Camille Larue, Laura Bonk, Asif Khan, Hiram Castillo-Michel, Ricardo J Stein, Daniel Grolimund, Dominik Begerow, Ulla Neumann, Michael J Haydon, Ute Krämer
Etiolated growth in darkness or the irreversible transition to photomorphogenesis in the light engages alternative developmental programs operating across all organs of a plant seedling. Dark-grown Arabidopsis de-etiolated by zinc (dez) mutants exhibit morphological, cellular, metabolic, and transcriptional characteristics of light-grown seedlings. We identify the causal mutation in TRICHOME BIREFRINGENCE encoding a putative acyl transferase. Pectin acetylation is decreased in dez, as previously found in the reduced wall acetylation2-3 mutant, shown here to phenocopy dez...
November 20, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/29098789/gene-expression-differs-in-co-dominant-prairie-grasses-under-drought
#8
Ava M Hoffman, Melinda D Smith
Grasslands of the Central US are expected to experience severe droughts and other climate extremes in the future, yet we know little about how these grasses will respond in terms of gene expression. We compared gene expression in Andropogon gerardii and Sorghastrum nutans, two closely related co-dominant C4 grasses responsible for the majority of ecosystem function, using RNA-seq. We compared Trinity assemblies within each species to determine annotated functions of transcripts responding to drought. Subsequently, we compared homologous annotated gene-groups across the two species using cross-species meta-level analysis and functional clustering based on key terms...
November 3, 2017: Molecular Ecology Resources
https://www.readbyqxmd.com/read/29096695/floral-micromorphology-and-transcriptome-analyses-of-a-fragrant-vandaceous-orchid-vanda-mimi-palmer-for-its-fragrance-production-sites
#9
Conie Toh, Ab Rahim Mohd-Hairul, Nooraini Mohd Ain, Parameswari Namasivayam, Rusea Go, Nur Ashikin Psyquay Abdullah, Meilina Ong Abdullah, Janna Ong Abdullah
BACKGROUND: Vanda Mimi Palmer (VMP) is commercially valuable for its strong fragrance but little is known regarding the fragrance production and emission sites on the flowers. RESULTS: Olfactory perception detected fragrance only from the petals and sepals. Light and Environmental Scanning Electron microscopy analyses on fresh tissues showed distributions of stomata and trichomes concentrated mostly around the edges. These results paralleled the rich starch deposits and intense neutral red stain, indicating strong fragrance and trichomes as potential main fragrance release sites...
November 2, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/29095905/the-complete-chloroplast-genome-sequence-of-the-cam-epiphyte-spanish-moss-tillandsia-usneoides-bromeliaceae-and-its-comparative-analysis
#10
Péter Poczai, Jaakko Hyvönen
Spanish moss (Tillandsia usneoides) is an epiphytic bromeliad widely distributed throughout tropical and warm temperate America. This plant is highly adapted to extreme environmental conditions. Striking features of this species include specialized trichomes (scales) covering the surface of its shoots aiding the absorption of water and nutrients directly from the atmosphere and a specific photosynthesis using crassulacean acid metabolism (CAM). Here we report the plastid genome of Spanish moss and present the comparison of genome organization and sequence evolution within Poales...
2017: PloS One
https://www.readbyqxmd.com/read/29093723/hydraulic-strategy-of-cactus-trichome-for-absorption-and-storage-of-water-under-arid-environment
#11
Kiwoong Kim, Hyejeong Kim, Sung Ho Park, Sang Joon Lee
Being an essential component in various metabolic activities, water is important for the survival of plants and animals. Cacti grown in arid areas have developed intrinsic water management systems, such as water collection through spines, water absorption through trichome, and water storage using mucilage. The water collection method of cactus is well-documented, but its water absorption and storage strategies remain to be elucidated. Thus, this study analyzed the morphology and wettability of cactus trichomes by using advanced bio-imaging techniques and by performing in vitro experiments on an artificial system mimicking these structures, respectively...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29091286/manganese-distribution-and-speciation-help-to-explain-the-effects-of-silicate-and-phosphate-on-manganese-toxicity-in-four-crop-species
#12
F Pax C Blamey, Brigid A McKenna, Cui Li, Miaomiao Cheng, Caixian Tang, Haibo Jiang, Daryl L Howard, David J Paterson, Peter Kappen, Peng Wang, Neal W Menzies, Peter M Kopittke
Soil acidity and waterlogging increase manganese (Mn) in leaf tissues to potentially toxic concentrations, an effect reportedly alleviated by increased silicon (Si) and phosphorus (P) supply. Effects of Si and P on Mn toxicity were studied in four plant species using synchrotron-based micro X-ray fluorescence (μ-XRF) and nanoscale secondary ion mass spectrometry (NanoSIMS) to determine Mn distribution in leaf tissues and using synchrotron-based X-ray absorption spectroscopy (XAS) to measure Mn speciation in leaves, stems and roots...
November 1, 2017: New Phytologist
https://www.readbyqxmd.com/read/29072096/salvia-broussonetii-benth-aroma-profile-and-micromorphological-analysis
#13
Basma Najar, Luisa Pistelli, Claudio Cervelli, Gelsomina Fico, Claudia Giuliani
The volatile profiles (VOC) and the essential oil (EO) composition from the aerial parts of Salvia broussonetii were analysed. Sesquiterpene hydrocarbons dominate the VOCs from leaves (95.7%) and flowers (67.6%), followed by monoterpene hydrocarbons (2.6 and 29.7%, respectively). The main common compounds are germacrene D, β-bourbonene, α-pinene, α-copaene and α-gurjunene, even if with divergent relative abundances. In the leaf EOs the sesquiterpenes prevail, even if not overwhelmingly (about 50.0%), followed by monoterpenes (23...
October 26, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29034968/genetics-and-evolution-of-mixta-genes-regulating-cotton-lint-fiber-development
#14
Huaitong Wu, Yue Tian, Qun Wan, Lei Fang, Xueying Guan, Jiedan Chen, Yan Hu, Wenxue Ye, Hua Zhang, Wangzhen Guo, Xiaoya Chen, Tianzhen Zhang
Cotton, with cellulose-enriched mature fibers, is the largest source of natural textiles. Through a map-based cloning strategy, we isolated an industrially important lint fiber development gene (Li3 ) that encodes an MYB-MIXTA-like transcription factor (MML) on chromosome D12 (GhMML4_D12). Virus-induced gene silencing or decreasing the expression of the GhMML4_D12 gene in n2 NSM plants resulted in a significant reduction in epidermal cell prominence and lint fiber production. GhMML4_D12 is arranged in tandem with GhMML3, another MIXTA gene responsible for fuzz fiber development...
October 16, 2017: New Phytologist
https://www.readbyqxmd.com/read/29033660/gelidocalamus-xunwuensis-poaceae-bambusoideae-a-new-species-from-southeastern-jiangxi-china
#15
Wen-Gen Zhang, Xue-Nan Ji, Yu-Guang Liu, Wei-Jian Li, Guang-Yao Yang
Gelidocalamus xunwuensis W.G.Zhang & G.Y.Yang, a new species collected from Xunwu County of Jiangxi Province in China, is described and illustrated. The new species is similar to G. stellatus in the habit, but differs by internodes sparsely hairy with granuliferous warts, culm sheath stiffly hairy, culm sheath blade broadly lanceolate to narrowly triangular, each node with a ring of appressed trichomes below, foliage leaves broadly lanceolate to narrowly oblong, and new shoots occurring in late October.
2017: PhytoKeys
https://www.readbyqxmd.com/read/28994416/a-high-quality-genome-assembly-of-quinoa-provides-insights-into-the-molecular-basis-of-salt-bladder-based-salinity-tolerance-and-the-exceptional-nutritional-value
#16
Changsong Zou, Aojun Chen, Lihong Xiao, Heike M Muller, Peter Ache, Georg Haberer, Meiling Zhang, Wei Jia, Ping Deng, Ru Huang, Daniel Lang, Feng Li, Dongliang Zhan, Xiangyun Wu, Hui Zhang, Jennifer Bohm, Renyi Liu, Sergey Shabala, Rainer Hedrich, Jian-Kang Zhu, Heng Zhang
Chenopodium quinoa is a halophytic pseudocereal crop that is being cultivated in an ever-growing number of countries. Because quinoa is highly resistant to multiple abiotic stresses and its seed has a better nutritional value than any other major cereals, it is regarded as a future crop to ensure global food security. We generated a high-quality genome draft using an inbred line of the quinoa cultivar Real. The quinoa genome experienced one recent genome duplication about 4.3 million years ago, likely reflecting the genome fusion of two Chenopodium parents, in addition to the γ paleohexaploidization reported for most eudicots...
November 2017: Cell Research
https://www.readbyqxmd.com/read/28993926/effects-of-dust-on-forest-tree-health-in-zagros-oak-forests
#17
A Moradi, K Taheri Abkenar, M Afshar Mohammadian, N Shabanian
Dust is one of the most devastating factors for the environment threatening all animal and plant species. In many regions, the ecological and economic impact of microdust on scarce species is critical. In the western region of Iran, the Zagros forests have been exposed to dust storms for many years. In this study, the effect of dust on oak trees, the most important trees of Zagros forests, is investigated. For this purpose, 3-year-old seedlings of three species of oak trees under natural conditions were exposed to dust during spring and summer months...
October 10, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28985388/leaf-surface-traits-and-water-storage-retention-affect-photosynthetic-responses-to-leaf-surface-wetness-among-wet-tropical-forest-and-semiarid-savanna-plants
#18
Luiza M T Aparecido, Gretchen R Miller, Anthony T Cahill, Georgianne W Moore
While it is reasonable to predict that photosynthetic rates are inhibited while leaves are wet, leaf gas exchange measurements during wet conditions are challenging to obtain due to equipment limitations and the complexity of canopy-atmosphere interactions in forested environments. Thus, the objective of this study was to evaluate responses of seven tropical and three semiarid savanna plant species to simulated leaf wetness and test the hypotheses that (i) leaf wetness reduces photosynthetic rates (Anet), (ii) leaf traits explain different responses among species and (iii) leaves from wet environments are better adapted for wet leaf conditions than those from drier environments...
October 1, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28975523/analyzing-trichomes-and-spatio-temporal-expression-of-a-cysteine-protease-gene-mucunain-in-mucuna-pruriens-l-dc
#19
Susheel Kumar Singh, Sunita Singh Dhawan
Mucuna pruriens is a well-known legume for the itching attributes of the trichome and a valuable medicinal herb that is used for the treatment of Parkinson's disease, sexual debilities, etc. Its cultivation was deprived due to its itching behavior. The wild genotype of M. pruriens have the largest trichome length (2015 ± 29 μm) compared to other genotype and mutants. The white-seeded variety of M. pruriens was found to be the most suitable for large-scale cultivation due to the small trichome size and less trichome density on the pod...
October 3, 2017: Protoplasma
https://www.readbyqxmd.com/read/28972149/activity-of-the-purified-plant-abc-transporter-ntpdr1-is-stimulated-by-diterpenes-and-sesquiterpenes-involved-in-constitutive-and-induced-defenses
#20
Baptiste Pierman, Frederic Toussaint, Aurelie Bertin, Daniel Levy, Nicolas Smargiasso, Ewin De Pauw, Marc Boutry
Within the plant ABC transporter family, pleiotropic drug resistance (PDR) transporters play essential functions, such as in hormone transport or defense against biotic and abiotic stresses. NtPDR1 from Nicotiana tabacum has been shown to be involved in the constitutive defense against pathogens through the secretion of toxic cyclic diterpenes such as the antimicrobial substrates cembrene and sclareol from the leaf hairs (trichomes). However, direct evidence of an interaction between NtPDR1 and terpenes is lacking...
September 29, 2017: Journal of Biological Chemistry
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