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https://www.readbyqxmd.com/read/29024401/constituents-of-the-argentine-liverwort-plagiochila-diversifolia-and-their-insecticidal-activities
#1
Marta Ramírez, Norma Kamiya, Susana Popich, Yoshinori Asakawa, Alicia Bardón
Three new compounds, a bicyclogermacrene (1) and two 2,3-secoaromadendrane esters (2 and 3), together with (13S)-13-hydroxy-8,14-labdadiene (4), fusicogigantone B (5), 3α, 14-diacetoxy-2-hydoxybicyclogermacrene (6), fusicogigantone A (7), neofuranoplagiochilal (8), plagiochiline B (9), furanoplagiochilal (10), trans-nerolidol, spathulenol, α-tocopherol and (+) globulol were isolated from an Argentine collection of Plagiochila diversifolia. Their structures were elucidated by extensive mono and bidimensional NMR studies...
October 10, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/29019405/chemical-constituents-of-bryophytes-structures-and-biological-activity
#2
Yoshinori Asakawa, Agnieszka Ludwiczuk
Comparatively little attention has been paid to the bryophytes for use in the human diet or medicine in spite of the presence of 23 000 species globally. Several hundred new compounds have been isolated from the liverworts (Marchantiophyta), and more than 40 new carbon skeletons of terpenoids and aromatic compounds were found. Most of the liverworts studied elaborate characteristic odiferous, pungent, and bitter-tasting compounds, of which many show antimicrobial, antifungal, antiviral, allergic contact dermatitis, cytotoxic, insecticidal, anti-HIV, plant growth regulatory, neurotrophic, NO production and superoxide anion radical release inhibitory, muscle relaxing, antiobesity, piscicidal, and nematocidal activities...
October 11, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/29016901/the-roles-of-the-sole-activator-type-auxin-response-factor-in-pattern-formation-of-marchantia-polymorpha
#3
Hirotaka Kato, Masaru Kouno, Mayuko Takeda, Hidemasa Suzuki, Kimitsune Ishizaki, Ryuichi Nishihama, Takayuki Kohchi
Cell division patterning is important to determine body shape in plants. Nuclear auxin signaling mediated by AUXIN RESPONSE FACTOR (ARF) transcription factors affects plant growth and development through regulation of cell division, elongation and differentiation. The evolutionary origin of the ARF-mediated pathway dates back to at least the common ancestor of bryophytes and other land plants. The liverwort Marchantia polymorpha has three phylogenetically distinct ARFs: MpARF1, the sole 'activator' ARF; and MpARF2 and MpARF3, two 'repressor' ARFs...
July 20, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28985561/insights-into-land-plant-evolution-garnered-from-the-marchantia-polymorpha-genome
#4
John L Bowman, Takayuki Kohchi, Katsuyuki T Yamato, Jerry Jenkins, Shengqiang Shu, Kimitsune Ishizaki, Shohei Yamaoka, Ryuichi Nishihama, Yasukazu Nakamura, Frédéric Berger, Catherine Adam, Shiori Sugamata Aki, Felix Althoff, Takashi Araki, Mario A Arteaga-Vazquez, Sureshkumar Balasubrmanian, Kerrie Barry, Diane Bauer, Christian R Boehm, Liam Briginshaw, Juan Caballero-Perez, Bruno Catarino, Feng Chen, Shota Chiyoda, Mansi Chovatia, Kevin M Davies, Mihails Delmans, Taku Demura, Tom Dierschke, Liam Dolan, Ana E Dorantes-Acosta, D Magnus Eklund, Stevie N Florent, Eduardo Flores-Sandoval, Asao Fujiyama, Hideya Fukuzawa, Bence Galik, Daniel Grimanelli, Jane Grimwood, Ueli Grossniklaus, Takahiro Hamada, Jim Haseloff, Alexander J Hetherington, Asuka Higo, Yuki Hirakawa, Hope N Hundley, Yoko Ikeda, Keisuke Inoue, Shin-Ichiro Inoue, Sakiko Ishida, Qidong Jia, Mitsuru Kakita, Takehiko Kanazawa, Yosuke Kawai, Tomokazu Kawashima, Megan Kennedy, Keita Kinose, Toshinori Kinoshita, Yuji Kohara, Eri Koide, Kenji Komatsu, Sarah Kopischke, Minoru Kubo, Junko Kyozuka, Ulf Lagercrantz, Shih-Shun Lin, Erika Lindquist, Anna M Lipzen, Chia-Wei Lu, Efraín De Luna, Robert A Martienssen, Naoki Minamino, Masaharu Mizutani, Miya Mizutani, Nobuyoshi Mochizuki, Isabel Monte, Rebecca Mosher, Hideki Nagasaki, Hirofumi Nakagami, Satoshi Naramoto, Kazuhiko Nishitani, Misato Ohtani, Takashi Okamoto, Masaki Okumura, Jeremy Phillips, Bernardo Pollak, Anke Reinders, Moritz Rövekamp, Ryosuke Sano, Shinichiro Sawa, Marc W Schmid, Makoto Shirakawa, Roberto Solano, Alexander Spunde, Noriyuki Suetsugu, Sumio Sugano, Akifumi Sugiyama, Rui Sun, Yutaka Suzuki, Mizuki Takenaka, Daisuke Takezawa, Hirokazu Tomogane, Masayuki Tsuzuki, Takashi Ueda, Masaaki Umeda, John M Ward, Yuichiro Watanabe, Kazufumi Yazaki, Ryusuke Yokoyama, Yoshihiro Yoshitake, Izumi Yotsui, Sabine Zachgo, Jeremy Schmutz
The evolution of land flora transformed the terrestrial environment. Land plants evolved from an ancestral charophycean alga from which they inherited developmental, biochemical, and cell biological attributes. Additional biochemical and physiological adaptations to land, and a life cycle with an alternation between multicellular haploid and diploid generations that facilitated efficient dispersal of desiccation tolerant spores, evolved in the ancestral land plant. We analyzed the genome of the liverwort Marchantia polymorpha, a member of a basal land plant lineage...
October 5, 2017: Cell
https://www.readbyqxmd.com/read/28985556/land-plant-model-systems-branch-out
#5
Charles F Delwiche, Charles A Goodman, Caren Chang
The genome of the liverwort Marchantia polymorpha is an important step toward development of a new plant model system (Bowman et al., 2017). Liverworts may be the sister taxon to all other land plants, and the genome shows features that illuminate the ancestor of all land plants and give insights into how plant systems function and evolved.
October 5, 2017: Cell
https://www.readbyqxmd.com/read/28985148/phytochrome-interacting-factors-from-physcomitrella-patens-are-active-in-arabidopsis-and-complement-the-pif-quadruple-mutant
#6
Tengfei Xu, Andreas Hiltbrunner
Phytochromes are red/far-red light receptors in plants involved in the regulation of growth and development in response to changes in the ambient environment. An important mode of action of plant phytochromes depends on their light-regulated relocation from the cytosol into the nucleus and control of gene expression; in addition, there is also evidence for a cytosolic or plasma membrane associated function of phytochromes in different species. The PHYTOCHROME INTERACTING FACTORs (PIFs) form a subgroup of the bHLH transcription factors and it is well established that PIFs are key components of phytochrome downstream signalling in the nucleus of seed plants...
October 6, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28935182/eudesmane-sesquiterpenes-from-chinese-liverwort-are-substrates-of-cdrs-and-display-antifungal-activity-by-targeting-erg6-and-erg11-of-candida-albicans
#7
Siwen Li, Hongzhuo Shi, Wenqiang Chang, Yi Li, Ming Zhang, Yanan Qiao, Hongxiang Lou
We isolated twelve sesquiterpenes from Chinese liverwort Tritomaria quinquedentata (Huds.) Buch., including four new compounds. Among them, five eudesmane sesquiterpenes were ineffective against Candida albicans wild strain SC5314 but active towards efflux pumps-deficient strain DSY654 using Alamar blue assay. Further test of the most active agent of ent-isoalantolactone (8, ent-iLL) showed that it also inhibited the yeast-to-hyphal switch of DSY654 cells. The intracellular content measurement using high performance liquid chromatography (HPLC) revealed that ent-iLL was intracellularly accumulated in C...
September 9, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28892172/evolutionary-conservation-of-structure-and-function-of-the-uvr8-photoreceptor-from-the-liverwort-marchantia-polymorpha-and-the-moss-physcomitrella-patens
#8
Gonzalo Soriano, Catherine Cloix, Monika Heilmann, Encarnación Núñez-Olivera, Javier Martínez-Abaigar, Gareth I Jenkins
The ultraviolet-B (UV-B) photoreceptor UV RESISTANCE LOCUS 8 (UVR8) mediates photomorphogenic responses to UV-B in Arabidopsis through differential gene expression, but little is known about UVR8 in other species. Bryophyte lineages were the earliest diverging embryophytes, thus being the first plants facing the UV-B regime typical of land. We therefore examined whether liverwort and moss species have functional UVR8 proteins and whether they are regulated similarly to Arabidopsis UVR8. We examined the expression, dimer/monomer status, cellular localisation and function of Marchantia polymorpha and Physcomitrella patens UVR8 in experiments with bryophyte tissue and expression of green fluorescent protein (GFP)-UVR8 fusions in Nicotiana leaves and transgenic Arabidopsis...
September 11, 2017: New Phytologist
https://www.readbyqxmd.com/read/28841357/abscisic-acid-aba-and-key-proteins-in-its-perception-and-signaling-pathways-are-ancient-but-their-roles-have-changed-through-time
#9
Frances C Sussmilch, Nadia M Atallah, Timothy J Brodribb, Jo Ann Banks, Scott A M McAdam
Homologs of the Arabidopsis core abscisic acid (ABA) signaling component OPEN STOMATA1 (OST1) are best known for their role in closing stomata in angiosperm species. We recently characterized a fern OST1 homolog, GAMETOPHYTES ABA INSENSITIVE ON ANTHERDIOGEN 1 (GAIA1), which is not required for stomatal closure in ferns, consistent with physiologic evidence that shows the stomata of these plants respond passively to changes in leaf water status. Instead, gaia1 mutants reveal a critical role in ABA signaling for spore dormancy and sex determination, in a system regulated by antagonism between ABA and the gibberellin (GA)-derived fern hormone antheridiogen (ACE)...
August 25, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28765721/on-the-diversity-and-richness-of-understory-bryophytes-at-nectandra-cloud-forest-reserve-costa-rica
#10
Daniel H Norris, Ekaphan Kraichak, Allen C Risk, Diane Lucas, Dorothy J Allard, Frida Rosengren, Theresa A Clark, Nicole Fenton, Michael Tessler, Nonkululo Phephu, Evelyne T Lennette
BACKGROUND: A survey of the understory bryophytes in the Nectandra Cloud Forest Preserve yielded 1083 specimens distributed among 55 families, represented by 74 genera of mosses, 75 genera of liverworts and 3 of hornworts. We studied and analyzed the bryophytic distribution on six types of substrates: 1) corticolous, 2) epiphyllous, 3) saxicolous, 4) terricolous, 5) aquatic and 6) lignicolous. The richness and composition of bryophyte genera are compared to those of other previous bryophyte surveys from 4 other sites with different oceanic exposures, climatic and geographic conditions in Costa Rica...
2017: Biodiversity Data Journal
https://www.readbyqxmd.com/read/28751898/comparative-analysis-of-chloroplast-psbd-promoters-in-terrestrial-plants
#11
Shuichi Shimmura, Mikio Nozoe, Shota Kitora, Satoko Kin, Shigeru Matsutani, Yoko Ishizaki, Yoichi Nakahira, Takashi Shiina
The transcription of photosynthesis genes encoded by the plastid genome is mainly mediated by a prokaryotic-type RNA polymerase called plastid-encoded plastid RNA polymerase (PEP). Standard PEP-dependent promoters resemble bacterial sigma-70-type promoters containing the so-called -10 and -35 elements. On the other hand, an unusual light- and stress-responsive promoter (psbD LRP) that is regulated by a 19-bp AAG-box immediately upstream of the -35 element has been mapped upstream of the psbD-psbC operon in some angiosperms...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28692333/boron-and-the-evolutionary-development-of-roots
#12
Ulrich Kutschera, Karl J Niklas
Experimental work has shown that Boron (i.e., Boric acid, B) is an essential and multifunctional microelement for vascular plant development. In addition to its other functions, which include xylem development and lignin biosynthesis, we now know that B is involved in phytohormone-signaling and influences the mechanical properties of intercellular pectins. From these data, we conclude that B played an important role during the evolutionary development of lignified tissues, and that it may have been involved in the evolution of vascular plant roots, as hypothesized by D...
July 3, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28676660/drp3-and-elm1-are-required-for-mitochondrial-fission-in-the-liverwort-marchantia-polymorpha
#13
Nagisa Nagaoka, Akihiro Yamashita, Rina Kurisu, Yuta Watari, Fumiko Ishizuna, Nobuhissro Tsutsumi, Kimitsune Ishizaki, Takayuki Kohchi, Shin-Ichi Arimura
Mitochondria increase in number by the fission of existing mitochondria. Mitochondrial fission is needed to provide mitochondria to daughter cells during cell division. In Arabidopsis thaliana, four kinds of genes have been reported to be involved in mitochondrial fission. Two of them, DRP3 (dynamin-related protein3) and FIS1 (FISSION1), are well conserved in eukaryotes. The other two are plant-specific ELM1 (elongated mitochondria1) and PMD (peroxisomal and mitochondrial division). To better understand the commonality and diversity of mitochondrial fission factors in land plants, we examined mitochondrial fission-related genes in a liverwort, Marchantia polymorpha...
July 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28634853/chloroplast-aggregation-during-the-cold-positioning-response-in-the-liverwort-marchantia-polymorpha
#14
Hiroyuki Tanaka, Mayuko Sato, Yuka Ogasawara, Noriko Hamashima, Othmar Buchner, Andreas Holzinger, Kiminori Toyooka, Yutaka Kodama
Under low-light conditions, chloroplasts localize along periclinal cell walls at temperatures near 20 °C, but they localize along anticlinal cell walls near 5 °C. This phenomenon is known as the cold-positioning response. We previously showed that chloroplasts move as aggregates rather than individually during the cold-positioning response in the fern Adiantum capillus-veneris. This observation suggested that chloroplasts physically interact with each other during the cold-positioning response. However, the physiological processes underlying chloroplast aggregation are unclear...
June 20, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28587992/the-isolation-and-functional-characterization-of-three-liverwort-genes-encoding-cinnamate-4-hydroxylase
#15
Xin-Yan Liu, Hai-Na Yu, Shuai Gao, Yi-Feng Wu, Ai-Xia Cheng, Hong-Xiang Lou
The plant phenylpropanoid pathway is responsible for the synthesis of a wide variety of secondary metabolites. The second step in phenylpropanoid synthesis is carried out by the cytochrome P450 monooxygenase enzyme cinnamate 4-hydroxylase (C4H), which catalyzes the p-hydroxylation of trans-cinnamic acid to p-coumarate. Genes encoding C4H have been characterized in many vascular plant species, but as yet not in any bryophyte species. Here, a survey of the transcriptome sequences of four liverwort species was able to identify eight putative C4Hs...
May 26, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28573928/diversity-of-mitochondrial-plastid-dnas-mtpts-in-seed-plants
#16
Xin-Cun Wang, Haimei Chen, Dan Yang, Chang Liu
Mitochondrial plastid DNAs (MTPTs) refer to plastid-derived DNA fragments in mitochondrial genomes. While the MTPTs have been described for numerous species, its overall patterns have not been examined in details. Here, we carried out a systematic analysis of MTPTs among 73 plant species, including 28 algae, 1 liverwort, 2 moss, 1 lycophyte, 1 gymnosperm, 1 magnoliid, 12 monocots, 26 eudicots and 1 relic angiosperm Amborella trichopoda. A total of 300 MTPT gene clusters were found in 39 seed plants, which represented 144 MTPT gene cluster types...
June 2, 2017: Mitochondrial DNA. Part A. DNA Mapping, Sequencing, and Analysis
https://www.readbyqxmd.com/read/28567683/the-biological-response-chain-to-pollution-a-case-study-from-the-italian-triangle-of-death-assessed-with-the-liverwort-lunularia-cruciata
#17
Adriana Basile, Stefano Loppi, Marina Piscopo, Luca Paoli, Andrea Vannini, Fabrizio Monaci, Sergio Sorbo, Marco Lentini, Sergio Esposito
The liverwort Lunularia cruciata, known for being a species tolerant to pollution able to colonize urban areas, was collected in the town of Acerra (South Italy) to investigate the biological effects of air pollution in one of the three vertices of the so-called Italian Triangle of Death. The ultrastructural damages observed by transmission electron microscopy in specimens collected in Acerra were compared with samples collected in the city center of Naples and in a small rural site far from sources of air pollution (Riccia, Molise, Southern Italy)...
May 31, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28502748/cytochrome-p450-diversity-in-the-tree-of-life
#18
David R Nelson
Sequencing in all areas of the tree of life has produced >300,000 cytochrome P450 (CYP) sequences that have been mined and collected. Nomenclature has been assigned to >41,000 CYP sequences and the majority of the remainder has been sorted by BLAST searches into clans, families and subfamilies in preparation for naming. The P450 sequence space is being systematically explored and filled in. Well-studied groups like vertebrates are covered in greater depth while new insights are being added into uncharted territories like horseshoe crab (Limulus polyphemus), tardigrades (Hypsibius dujardini), velvet worm (Euperipatoides_rowelli), and basal land plants like hornworts, liverworts and mosses...
May 11, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28481281/the-functional-characterization-of-a-site-specific-apigenin-4-o-methyltransferase-synthesized-by-the-liverwort-species-plagiochasma-appendiculatum
#19
Hui Liu, Rui-Xue Xu, Shuai Gao, Ai-Xia Cheng
Apigenin, a widely distributed flavone, exhibits excellent antioxidant, anti-inflammatory, and antitumor properties. In addition, the methylation of apigenin is generally considered to result in better absorption and greatly increased bioavailability. Here, four putative Class II methyltransferase genes were identified from the transcriptome sequences generated from the liverwort species Plagiochasma appendiculatum. Each was heterologously expressed as a His-fusion protein in Escherichia coli and their methylation activity against apigenin was tested...
May 7, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28446636/insights-into-the-evolution-of-hydroxyproline-rich-glycoproteins-from-1000-plant-transcriptomes
#20
Kim L Johnson, Andrew M Cassin, Andrew Lonsdale, Gane Ka-Shu Wong, Douglas E Soltis, Nicholas W Miles, Michael Melkonian, Barbara Melkonian, Michael K Deyholos, James Leebens-Mack, Carl J Rothfels, Dennis W Stevenson, Sean W Graham, Xumin Wang, Shuangxiu Wu, J Chris Pires, Patrick P Edger, Eric J Carpenter, Antony Bacic, Monika S Doblin, Carolyn J Schultz
The carbohydrate-rich cell walls of land plants and algae have been the focus of much interest given the value of cell wall-based products to our current and future economies. Hydroxyproline-rich glycoproteins (HRGPs), a major group of wall glycoproteins, play important roles in plant growth and development, yet little is known about how they have evolved in parallel with the polysaccharide components of walls. We investigate the origins and evolution of the HRGP superfamily, which is commonly divided into three major multigene families: the arabinogalactan proteins (AGPs), extensins (EXTs), and proline-rich proteins...
June 2017: Plant Physiology
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