keyword
MENU ▼
Read by QxMD icon Read
search

strigolactone

keyword
https://www.readbyqxmd.com/read/28289131/brc1-expression-regulates-bud-activation-potential-but-is-not-necessary-or-sufficient-for-bud-growth-inhibition-in-arabidopsis
#1
Madeleine Seale, Tom Bennett, Ottoline Leyser
The degree of shoot branching in Arabidopsis is determined by the activation of axillary buds. Bud activity is regulated by diverse environmental and developmental signals, often mediated via plant hormones including auxin, strigolactone and cytokinin. The transcription factor, BRANCHED1 (BRC1), has been proposed to integrate these regulatory signals. This idea is based on increased branching in brc1 mutants, the effects of bud-regulating hormones on BRC1 expression, and a general correlation between BRC1 expression and bud growth inhibition...
March 13, 2017: Development
https://www.readbyqxmd.com/read/28263675/in-silico-analysis-of-3-expansin-gene-promoters-reveals-2-hubs-controlling-light-and-cytokinins-response-during-bud-outgrowth
#2
Hanaé Roman, Tiffanie Girault, José Le Gourrierec, Nathalie Leduc
Bud outgrowth is under the intricate control of environmental and endogenous factors. In a recent paper, (1) we demonstrated that light perceived by Rosa buds triggers cytokinins (CK) synthesis within 3 hours in the adjacent node followed by their transport to the bud. There, CK control expression of a set of major genes (strigolactones-, auxin-, sugar sink strength-, cells division and elongation-related genes) leading to bud outgrowth in light. Conversely, under dark condition, CK accumulation and transport to the bud are repressed and no bud outgrowth occurs...
February 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28262967/strigolactone-biosynthesis-is-evolutionarily-conserved-regulated-by-phosphate-starvation-and-contributes-to-resistance-against-phytopathogenic-fungi-in-a-moss-physcomitrella-patens
#3
Eva L Decker, Adrian Alder, Stefan Hunn, Jenny Ferguson, Mikko T Lehtonen, Bjoern Scheler, Klaus L Kerres, Gertrud Wiedemann, Vajiheh Safavi-Rizi, Steffen Nordzieke, Aparna Balakrishna, Lina Baz, Javier Avalos, Jari P T Valkonen, Ralf Reski, Salim Al-Babili
In seed plants, strigolactones (SLs) regulate architecture and induce mycorrhizal symbiosis in response to environmental cues. SLs are formed by combined activity of the carotenoid cleavage dioxygenases (CCDs) 7 and 8 from 9-cis-β-carotene, leading to carlactone that is converted by cytochromes P450 (clade 711; MAX1 in Arabidopsis) into various SLs. As Physcomitrella patens possesses CCD7 and CCD8 homologs but lacks MAX1, we investigated if PpCCD7 together with PpCCD8 form carlactone and how deletion of these enzymes influences growth and interactions with the environment...
March 6, 2017: New Phytologist
https://www.readbyqxmd.com/read/28215609/zealactones-novel-natural-strigolactones-from-maize
#4
Tatsiana V Charnikhova, Katharina Gaus, Alexandre Lumbroso, Mark Sanders, Jean-Paul Vincken, Alain De Mesmaeker, Carolien P Ruyter-Spira, Claudio Screpanti, Harro J Bouwmeester
In the root exudate and root extracts of maize hybrid cv NK Falkone seven putative strigolactones were detected using UPLC-TQ-MS-MS. All seven compounds displayed MS-MS-fragmentation common for strigolactones and particularly the presence of a fragment of m/z 97 Da, which may indicate the presence of the so-called D-ring, suggests they are strigolactones. The levels of all these putative strigolactones increased upon phosphate starvation and decreased upon fluridone (carotenoid biosynthesis inhibitor) treatment, both of which are a common response for strigolactones...
May 2017: Phytochemistry
https://www.readbyqxmd.com/read/28186640/insights-into-the-formation-of-carlactone-from-in-depth-analysis-of-the-ccd8-catalyzed-reactions
#5
Mark Bruno, Martina Vermathen, Adrian Alder, Florian Wüst, Patrick Schaub, Rob van der Steen, Peter Beyer, Sandro Ghisla, Salim Al-Babili
Strigolactones are a new class of phytohormones synthesized from carotenoids via carlactone. The complex structure of carlactone is not easily deducible from its precursor, a cis-configured β-carotene cleavage product, and is thus formed via a poorly understood series of reactions and molecular rearrangements, all catalyzed by only one enzyme, the carotenoid cleavage dioxygenase 8 (CCD8). Moreover, the reactions leading to carlactone are expected to form a second, yet unidentified product. In this study, we used (13) C and (18) O-labeling to shed light on the reactions catalyzed by CCD8...
March 2017: FEBS Letters
https://www.readbyqxmd.com/read/28143400/the-carotenoid-biosynthetic-and-catabolic-genes-in-wheat-and-their-association-with-yellow-pigments
#6
Pasqualina Colasuonno, Maria Luisa Lozito, Ilaria Marcotuli, Domenica Nigro, Angelica Giancaspro, Giacomo Mangini, Pasquale De Vita, Anna Maria Mastrangelo, Nicola Pecchioni, Kelly Houston, Rosanna Simeone, Agata Gadaleta, Antonio Blanco
BACKGROUND: In plants carotenoids play an important role in the photosynthetic process and photo-oxidative protection, and are the substrate for the synthesis of abscisic acid and strigolactones. In addition to their protective role as antioxidants and precursors of vitamin A, in wheat carotenoids are important as they influence the colour (whiteness vs. yellowness) of the grain. Understanding the genetic basis of grain yellow pigments, and identifying associated markers provide the basis for improving wheat quality by molecular breeding...
January 31, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28128458/analysis-of-nicotiana-tabacum-pin-genes-identifies-ntpin4-as-a-key-regulator-of-axillary-bud-growth
#7
Xiaodong Xie, Guangyong Qin, Ping Si, Zhaopeng Luo, Junping Gao, Xia Chen, Jianfeng Zhang, Pan Wei, Qingyou Xia, Fucheng Lin, Jun Yang
The plant-specific PIN-FORMED (PIN) auxin efflux proteins have been well characterized in many plant species, where they are crucial in the regulation of auxin transport in various aspects of plant development. However, little is known about the exact roles of the PIN genes during plant development in Nicotiana species. This study investigated the PIN genes in tobacco (N. tabacum) and in two ancestral species (N. sylvestris and N. tomentosiformis). Genome-wide analysis of the N. tabacum genome identified 20 genes of the PIN family...
January 27, 2017: Physiologia Plantarum
https://www.readbyqxmd.com/read/28125281/strigolactone-signaling-and-evolution
#8
Mark T Waters, Caroline Gutjahr, Tom Bennett, David C Nelson
Strigolactones are a structurally diverse class of plant hormones that control many aspects of shoot and root growth. Strigolactones are also exuded by plants into the rhizosphere, where they promote symbiotic interactions with arbuscular mycorrhizal fungi and germination of root parasitic plants in the Orobanchaceae family. Therefore, understanding how strigolactones are made, transported, and perceived may lead to agricultural innovations as well as a deeper knowledge of how plants function. Substantial progress has been made in these areas over the past decade...
January 11, 2017: Annual Review of Plant Biology
https://www.readbyqxmd.com/read/28059066/shhtl7-is-a-non-canonical-receptor-for-strigolactones-in-root-parasitic-weeds
#9
Ruifeng Yao, Fei Wang, Zhenhua Ming, Xiaoxi Du, Li Chen, Yupei Wang, Wenhao Zhang, Haiteng Deng, Daoxin Xie
No abstract text is available yet for this article.
January 6, 2017: Cell Research
https://www.readbyqxmd.com/read/28050825/strigolactone-mediated-stimulation-of-secondary-xylem-proliferation-in-stems
#10
Javier Agusti
Secondary xylem (wood) accounts for a large proportion of the terrestrial biomass. Understanding how secondary xylem develops and proliferates is a challenge to enhance our capacities for biomass production. Recent reports revealed that the plant hormone strigolactone is key for the development of secondary xylem. Here, I describe a protocol for strigolactone-mediated stimulation of secondary xylem proliferation in stems. The protocol has been tested in Arabidopsis and Eucalyptus and can be adjusted to other species...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28045179/heck-functionalization-of-an-asymmetric-aza-bodipy-core-synthesis-of-far-red-infrared-probes-for-bioimaging-applications
#11
Stefano Parisotto, Beatrice Lace, Emma Artuso, Chiara Lombardi, Annamaria Deagostino, Roberto Scudu, Claudio Garino, Claudio Medana, Cristina Prandi
As part of our ongoing work on the synthesis of a new class of plant hormones named Strigolactones (SLs) and their analogues, we became interested in tracing bioactive molecules with red emitting BODIPY fluorophores in order to unravel signaling and distribution of SLs in plants. In this paper we report on an unprecedented Heck functionalization of azadipyrromethenes (aza-DIPY) which allows for the introduction of suitable functional groups to convert aza-BODIPY in bioconjugate complexes useful for untangling biological processes...
January 3, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28002608/ntbrc1-suppresses-axillary-branching-in-tobacco-after-decapitation
#12
Y L Gao, Z B Song, W Z Li, F C Jiao, R Wang, C J Huang, Y P Li, B W Wang
Axillary branching is controlled by a very complex mechanism involving various endogenous and environmental factors. Previous studies have shown that Tb1/BRC1 is the point of integration in the network of molecular mechanisms regulating axillary branching in plants. In this study, we cloned the Tb1/BRC1 ortholog, NtBRC1, from Nicotiana tabacum and functionally analyzed its role in the control of axillary branching in tobacco. Overexpression of NtBRC1 resulted in significant retardation of axillary branching, and downregulation of this gene resulted in significant acceleration of axillary branching after decapitation...
December 19, 2016: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/27994609/reporter-gene-facilitated-detection-of-compounds-in-arabidopsis-leaf-extracts-that-activate-the-karrikin-signaling-pathway
#13
Yueming K Sun, Gavin R Flematti, Steven M Smith, Mark T Waters
Karrikins are potent germination stimulants generated by the combustion of plant matter. Treatment of Arabidopsis with karrikins triggers a signaling process that is dependent upon a putative receptor protein KARRIKIN INSENSITIVE 2 (KAI2). KAI2 is a homolog of DWARF 14 (D14), the receptor for endogenous strigolactone hormones. Genetic analyses suggest that KAI2 also perceives endogenous signal(s) that are not strigolactones. Activation of KAI2 by addition of karrikins to Arabidopsis plants induces expression of transcripts including D14-LIKE 2 (DLK2)...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27909790/strigolactones-affect-tomato-hormone-profile-and-somatic-embryogenesis
#14
Yuanli Wu, Evgenia Dor, Joseph Hershenhorn
Exogenously applied GR24 affected somatic embryo formation and morphogenesis of strigolactone-deficient tomato mutant through cross-talk with auxins and cytokinins indicating involvement of SLs in the embryogenic process. Strigolactones (SLs) mediate the regulation of plant responses to the environment through cross-talk with other plant hormones, especially auxins. Auxins play a crucial role in coordinating the morphogenesis and development of plant reproductive organs, including the signal-transduction cascade leading to the reprogramming of gene-expression patterns before embryo formation...
December 1, 2016: Planta
https://www.readbyqxmd.com/read/27909441/apple-f-box-protein-mdmax2-regulates-plant-photomorphogenesis-and-stress-response
#15
Jian-Ping An, Rui Li, Feng-Jia Qu, Chun-Xiang You, Xiao-Fei Wang, Yu-Jin Hao
MAX2 (MORE AXILLARY GROWTH2) is involved in diverse physiological processes, including photomorphogenesis, the abiotic stress response, as well as karrikin and strigolactone signaling-mediated shoot branching. In this study, MdMAX2, an F-box protein that is a homolog of Arabidopsis MAX2, was identified and characterized. Overexpression of MdMAX2 in apple calli enhanced the accumulation of anthocyanin. Ectopic expression of MdMAX2 in Arabidopsis exhibited photomorphogenesis phenotypes, including increased anthocyanin content and decreased hypocotyl length...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27858514/involvement-of-sth7-in-light-adapted-development-in-arabidopsis-thaliana-promoted-by-both-strigolactone-and-karrikin
#16
Jutiporn Thussagunpanit, Yuko Nagai, Miyu Nagae, Kiyoshi Mashiguchi, Nobutaka Mitsuda, Masaru Ohme-Takagi, Takeshi Nakano, Hidemitsu Nakamura, Tadao Asami
Strigolactones (SLs) and karrikins (KARs) regulate photomorphogenesis. GR24, a synthetic SL and KAR1, a KAR, inhibit the hypocotyl elongation of Arabidopsis thaliana in a weak light. GR24 and KAR1 up-regulate the expression of STH7, encoding a transcription factor belonging to the double B-box zinc finger subfamily. In this study, we used STH7-overexpressing (STH7ox) lines and functionally defective STH7 (STH7-SRDX) mutants to investigate roles of SLs and KARs in photomorphogenesis of Arabidopsis. Hypocotyl elongation of STH7-SRDX mutants was less sensitive to both GR24 and KAR1 treatment than that of wild-type Arabidopsis under weak light conditions...
February 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/27847871/strigoquant-a-genetically-encoded-biosensor-for-quantifying-strigolactone-activity-and-specificity
#17
Sophia L Samodelov, Hannes M Beyer, Xiujie Guo, Maximilian Augustin, Kun-Peng Jia, Lina Baz, Oliver Ebenhöh, Peter Beyer, Wilfried Weber, Salim Al-Babili, Matias D Zurbriggen
Strigolactones are key regulators of plant development and interaction with symbiotic fungi; however, quantitative tools for strigolactone signaling analysis are lacking. We introduce a genetically encoded hormone biosensor used to analyze strigolactone-mediated processes, including the study of the components involved in the hormone perception/signaling complex and the structural specificity and sensitivity of natural and synthetic strigolactones in Arabidopsis, providing quantitative insights into the stereoselectivity of strigolactone perception...
November 2016: Science Advances
https://www.readbyqxmd.com/read/27811075/enzymatic-study-on-atccd4-and-atccd7-and-their-potential-to-form-acyclic-regulatory-metabolites
#18
Mark Bruno, Julian Koschmieder, Florian Wuest, Patrick Schaub, Mirjam Fehling-Kaschek, Jens Timmer, Peter Beyer, Salim Al-Babili
The Arabidopsis carotenoid cleavage dioxygenase 4 (AtCCD4) is a negative regulator of the carotenoid content of seeds and has recently been suggested as a candidate for the generation of retrograde signals that are thought to derive from the cleavage of poly-cis-configured carotene desaturation intermediates. In this work, we investigated the activity of AtCCD4 in vitro and used dynamic modeling to determine its substrate preference. Our results document strict regional specificity for cleavage at the C9-C10 double bond in carotenoids and apocarotenoids, with preference for carotenoid substrates and an obstructing effect on hydroxyl functions, and demonstrate the specificity for all-trans-configured carotenes and xanthophylls...
November 2016: Journal of Experimental Botany
https://www.readbyqxmd.com/read/27793831/strigolactone-regulates-shoot-development-through-a-core-signalling-pathway
#19
Tom Bennett, Yueyang Liang, Madeleine Seale, Sally Ward, Dörte Müller, Ottoline Leyser
Strigolactones are a recently identified class of hormone that regulate multiple aspects of plant development. The DWARF14 (D14) α/β fold protein has been identified as a strigolactone receptor, which can act through the SCF(MAX2) ubiquitin ligase, but the universality of this mechanism is not clear. Multiple proteins have been suggested as targets for strigolactone signalling, including both direct proteolytic targets of SCF(MAX2), and downstream targets. However, the relevance and importance of these proteins to strigolactone signalling in many cases has not been fully established...
December 15, 2016: Biology Open
https://www.readbyqxmd.com/read/27766430/transcriptional-profiling-of-arbuscular-mycorrhizal-roots-exposed-to-high-levels-of-phosphate-reveals-the-repression-of-cell-cycle-related-genes-and-secreted-protein-genes-in-rhizophagus-irregularis
#20
Yusaku Sugimura, Katsuharu Saito
The development of arbuscular mycorrhiza (AM) is strongly suppressed under high-phosphate (Pi) conditions. To investigate AM fungal responses during the suppression of AM by high Pi, we performed an RNA-seq analysis of Rhizophagus irregularis colonizing Lotus japonicus roots at different levels of Pi (20, 100, 300, and 500 μM). AM fungal colonization decreased markedly under high-Pi conditions. In total, 163 fungal genes were differentially expressed among the four Pi treatments. Among these genes, a cell cycle-regulatory gene, cyclin-dependent kinase CDK1, and several DNA replication- and mitosis-related genes were repressed under high-Pi conditions...
February 2017: Mycorrhiza
keyword
keyword
76598
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"