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"Adventitious rooting"

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https://www.readbyqxmd.com/read/27909790/strigolactones-affect-tomato-hormone-profile-and-somatic-embryogenesis
#1
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/27889521/azacytidine-and-mir156-promote-rooting-in-adult-but-not-in-juvenile-arabidopsis-tissues
#2
Mehdi Massoumi, Frans A Krens, Richard G F Visser, Geert-Jan M De Klerk
Poor adventitious root (AR) formation is a major obstacle in micropropagation and conventional vegetative propagation of many crops. It is affected by many endogenous and exogenous factors. With respect to endogenous factors, the phase change from juvenile to adult has a major influence on AR formation and rooting is usually much reduced or even fully inhibited in adult tissues. It has been reported that the phase change is characterized by an increase in DNA-methylation and a decrease in the expression of microRNA156 (miR156)...
November 15, 2016: Journal of Plant Physiology
https://www.readbyqxmd.com/read/27883217/nitric-oxide-is-involved-in-methane-induced-adventitious-root-formation-in-cucumber
#3
Fang Qi, Zhixin Xiang, Ninghai Kou, Weiti Cui, Daokun Xu, Ren Wang, Dan Zhu, Wenbiao Shen
Our previous studies revealed that methane (CH4 ) induces adventitious rooting in cucumber. However, the corresponding molecular mechanism is still elusive. In this work, we discovered that CH4 triggered the accumulation of nitric oxide (NO) and thereafter cucumber adventitious rooting, mimicking the inducing effects of sodium nitroprusside (SNP) and NONOate (two NO-releasing compounds). Above mentioned responses were sensitive to NO scavenger(s), showing that the accumulation of NO and adventitious root development were respectively impaired...
November 24, 2016: Physiologia Plantarum
https://www.readbyqxmd.com/read/27876840/transcriptome-profiling-shows-gene-regulation-patterns-in-ginsenoside-pathway-in-response-to-methyl-jasmonate-in-panax-quinquefolium-adventitious-root
#4
Juan Wang, Jinxin Li, Jianli Li, Shujie Liu, Xiaolei Wu, Jing Li, Wenyuan Gao
Here, we combine elicitors and transcriptomics to investigate the inducible biosynthesis of the ginsenoside from the Panax quinquefolium. Treatment of P. quinquefolium adventitious root with methyl jasmonate (MJ) results in an increase in ginsenoside content (43.66 mg/g compared to 8.32 mg/g in control group). Therefore, we sequenced the transcriptome of native and MJ treated adventitious root in order to elucidate the key differentially expressed genes (DEGs) in the ginsenoside biosynthetic pathway. Through DEG analysis, we found that 5,759 unigenes were up-regulated and 6,389 unigenes down-regulated in response to MJ treatment...
November 23, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27831927/a-comparative-proteomic-analysis-for-adventitious-root-formation-in-lotus-root-nelumbo-nucifera-gaertn
#5
Cheng Libao, Jiang Runzhi, Yang Mengli, Li Liangjun, Li Shuyan
Adventitious roots (ARs) directly affect lotus seedling growth and product quality because principal root is not well developed. However, the details of AR formation at the molecular level have not been determined in lotus. Therefore, three stages were chosen to identify the change of proteins abundant during rhizome formation, using isobaric tags for relative and absolute quantization coupled with liquid chromatography-tandem mass spectrometry to gain insight into the molecular mechanisms involved in AR formation...
November 10, 2016: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/27831474/ethylene-and-auxin-interaction-in-the-control-of-adventitious-rooting-in-arabidopsis-thaliana
#6
A Veloccia, L Fattorini, F Della Rovere, A Sofo, S D'Angeli, C Betti, G Falasca, M M Altamura
Adventitious roots (ARs) are post-embryonic roots essential for plant survival and propagation. Indole-3-acetic acid (IAA) is the auxin that controls AR formation; however, its precursor indole-3-butyric acid (IBA) is known to enhance it. Ethylene affects many auxin-dependent processes by affecting IAA synthesis, transport and/or signaling, but its role in AR formation has not been elucidated. This research investigated the role of ethylene in AR formation in dark-grown Arabidopsis thaliana seedlings, and its interaction with IAA/IBA...
November 9, 2016: Journal of Experimental Botany
https://www.readbyqxmd.com/read/27790812/enhanced-photosynthesis-endows-seedling-growth-vigor-contributing-to-the-competitive-dominance-of-weedy-rice-over-cultivated-rice
#7
Lei Dai, Xiaoling Song, Baoye He, Bernal E Valverde, Sheng Qiang
BACKGROUND: Weedy rice, as one of the worst paddy field weeds worldwide, bears vigorous seedlings and dominantly competes with cultivated rice causing serious crop yield losses. To elucidate the causes of its stronger seedling vigor endowing its dominant competition with cultivated rice, comparative studies on seedling growth characteristics were conducted among six weedy rice biotypes and the two indica and japonica cultivars Shanyou-63 (SY-63) and Zhendao-8 (ZD-8), respectively, in the greenhouse...
October 28, 2016: Pest Management Science
https://www.readbyqxmd.com/read/27790230/comparative-proteomic-analysis-provides-insight-into-the-key-proteins-involved-in-cucumber-cucumis-sativus-l-adventitious-root-emergence-under-waterlogging-stress
#8
Xuewen Xu, Jing Ji, Xiaotian Ma, Qiang Xu, Xiaohua Qi, Xuehao Chen
Waterlogging is a common abiotic stress in both natural and agricultural systems, and it primarily affects plant growth by the slow oxygen diffusion in water. To sustain root function in the hypoxic environment, a key adaptation for waterlogging tolerant plants is the formation of adventitious roots (ARs). We found that cucumber waterlogging tolerant line Zaoer-N seedlings adapt to waterlogging stress by developing a larger number of ARs in hypocotyls, while almost no AR is generated in sensitive line Pepino...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27784768/transcription-factors-wox11-12-directly-activate-wox5-7-to-promote-root-primordia-initiation-and-organogenesis
#9
Xiaomei Hu, Lin Xu
De novo organogenesis, which gives rise to adventitious roots and shoots, is a type of plant regeneration for survival after wounding. In Arabidopsis (Arabidopsis thaliana), two main cell fate transition steps are required to establish the root primordium during de novo root organogenesis from leaf explants. The first step from regeneration-competent cells to root founder cells involves activation of WUSCHEL-RELATED HOMEOBOX11 (WOX11) and WOX12 (WOX11/12) expression by auxin. However, the molecular mechanism controlling the second step of fate transition from root founder cells to root primordium is poorly understood...
December 2016: Plant Physiology
https://www.readbyqxmd.com/read/27762444/a-major-locus-involved-in-the-formation-of-the-radial-oxygen-loss-barrier-in-adventitious-roots-of-teosinte-zea-nicaraguensis-is-located-on-the-short-arm-of-chromosome-3
#10
Kohtaro Watanabe, Hirokazu Takahashi, Saori Sato, Shunsaku Nishiuchi, Fumie Omori, Al Imran Malik, Timothy David Colmer, Yoshiro Mano, Mikio Nakazono
A radial oxygen loss (ROL) barrier in roots of waterlogging-tolerant plants promotes oxygen movement via aerenchyma to the root tip, and impedes soil phytotoxin entry. The molecular mechanism and genetic regulation of ROL barrier formation are largely unknown. Zea nicaraguensis, a waterlogging-tolerant wild relative of maize (Z. mays ssp. mays), forms a tight ROL barrier in its roots when waterlogged. We used Z. nicaraguensis chromosome segment introgression lines (ILs) in maize (inbred line Mi29) to elucidate the chromosomal region involved in regulating root ROL barrier formation...
October 20, 2016: Plant, Cell & Environment
https://www.readbyqxmd.com/read/27752244/acetylcholinesterase-inhibition-and-antibacterial-activity-of-mondia-whitei-adventitious-roots-and-ex-vitro-grown-somatic-embryogenic-biomass
#11
Ponnusamy Baskaran, Aloka Kumari, Bhekumthetho Ncube, Johannes Van Staden
Mondia whitei (Hook.f.) Skeels is an important endangered medicinal and commercial plant in South Africa. In vitro propagation systems are required for biomass production and bioactivity analysis to supplement wild resources/stocks. Adventitious roots from somatic embryogenic explants using suspension culture and ex vitro-grown plants produced via somatic embryogenesis were established using different plant growth regulator treatments. The adventitious root biomass and different parts of ex vitro-grown and mother plants were used to investigate the potential for acetylcholinesterase (AChE) and antibacterial activities...
2016: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/27746309/fungal-elicitors-enhance-ginsenosides-biosynthesis-expression-of-functional-genes-as-well-as-signal-molecules-accumulation-in-adventitious-roots-of-panax-ginseng-c-a-mey
#12
Jinxin Li, Shujie Liu, Juan Wang, Jing Li, Dahui Liu, Jianli Li, Wenyuan Gao
In this work, we selected three fungi strains (Aspergillus niger, Aspergillus flavus and Aspergillus oryzae) as elicitors prepared from mycelium or fermentation broth to improve ginsenosides production in adventitious roots culture. The results showed that ginsenosides production (29.90±4.67mgg(-1)) was significantly enhanced upon elicitation with 200mgL(-1)A. niger elicitor prepared from mycelium, which was 3.52-fold of untreated group. HPLC-ESI-MS(n) analysis was performed, showing that ginsenoside Rb3 was present after treatment with the A...
October 13, 2016: Journal of Biotechnology
https://www.readbyqxmd.com/read/27724871/nitrogen-remobilisation-facilitates-adventitious-root-formation-on-reversible-dark-induced-carbohydrate-depletion-in-petunia-hybrida
#13
Siegfried Zerche, Klaus-Thomas Haensch, Uwe Druege, Mohammad-Reza Hajirezaei
BACKGROUND: Adventitious root (AR) formation in axillary shoot tip cuttings is a crucial physiological process for ornamental propagation that is utilised in global production chains for young plants. In this process, the nitrogen and carbohydrate metabolisms of a cutting are regulated by its total nitrogen content (Nt), dark exposure during transport and irradiance levels at distinct production sites and phases through a specific plasticity to readjust metabolite pools. Here, we examined how elevated Nt contents with a combined dark exposure of cuttings influence their internal N-pools including free amino acids and considered early anatomic events of AR formation as well as further root development in Petunia hybrida cuttings...
October 10, 2016: BMC Plant Biology
https://www.readbyqxmd.com/read/27669493/potato-root-system-development-and-factors-that-determine-its-architecture
#14
Mukul Joshi, Edna Fogelman, Eduard Belausov, Idit Ginzberg
The potato root system is often characterized as shallow and inefficient, with poor ability to extract water and minerals from the soil. Potato root system architecture (RSA) refers to its 3-dimensional structure as determined by adventitious root (AR) growth and branching through lateral roots (LR). Understanding how the root system develops holds potential to increase plant yield and optimize agricultural land use. Root system development was monitored in greenhouse-grown potato while a root-on-a-plate assay was developed to explore factors that affect AR and LR development...
September 7, 2016: Journal of Plant Physiology
https://www.readbyqxmd.com/read/27644996/gene-expression-of-glycyrrhizin-acid-and-accumulation-of-endogenous-signaling-molecule-in-glycyrrhiza-uralensis-fisch-adventitious-roots-after-saccharomyces-cerevisiae-and-meyerozyma-guilliermondii-applications
#15
Jianli Li, Shujie Liu, Juan Wang, Jing Li, Jinxin Li, Wenyuan Gao
This study reports the best culture conditions for roots growth and accumulation of active components by optimizing the parameters. Glycyrrhiza uralensis adventitious roots metabolites were significantly increased after adding Saccharomyces cerevisiae and Meyerozyma guilliermondii. The highest contents of polysaccharide, glycyrrhizic acid, glycyrrhetinic acid and total flavonoids were obtained in Meyerozyma guilliermondii group, the content of glycyrrhizic acid was 5.3-fold higher than the control. In control and treatment groups, twelve compounds were identified by high performance liquid chromatography-electrospray ionization tandem mass spectrometry (HPLC-ESI-MS/MS),among which, some new compounds have been detected in elicitor groups including 5,7-Dihydroxyflavanone, glycyrrhisoflavanone, licorice saponin J2, uralsaponin B, (3R)-vestitol, uralenol...
September 20, 2016: Biotechnology and Applied Biochemistry
https://www.readbyqxmd.com/read/27541584/developmental-functions-of-mir156-regulated-squamosa-promoter-binding-protein-like-spl-genes-in-arabidopsis-thaliana
#16
Mingli Xu, Tieqiang Hu, Jianfei Zhao, Mee-Yeon Park, Keith W Earley, Gang Wu, Li Yang, R Scott Poethig
Correct developmental timing is essential for plant fitness and reproductive success. Two important transitions in shoot development-the juvenile-to-adult vegetative transition and the vegetative-to-reproductive transition-are mediated by a group of genes targeted by miR156, SQUAMOSA PROMOTER BINDING PROTEIN (SBP) genes. To determine the developmental functions of these genes in Arabidopsis thaliana, we characterized their expression patterns, and their gain-of-function and loss-of-function phenotypes. Our results reveal that SBP-LIKE (SPL) genes in Arabidopsis can be divided into three functionally distinct groups: 1) SPL2, SPL9, SPL10, SPL11, SPL13 and SPL15 contribute to both the juvenile-to-adult vegetative transition and the vegetative-to-reproductive transition, with SPL9, SP13 and SPL15 being more important for these processes than SPL2, SPL10 and SPL11; 2) SPL3, SPL4 and SPL5 do not play a major role in vegetative phase change or floral induction, but promote the floral meristem identity transition; 3) SPL6 does not have a major function in shoot morphogenesis, but may be important for certain physiological processes...
August 2016: PLoS Genetics
https://www.readbyqxmd.com/read/27516323/chemical-characterization-and-prebiotic-activity-of-fructo-oligosaccharides-from-stevia-rebaudiana-bertoni-roots-and-in-vitro-adventitious-root-cultures
#17
Sheila Mara Sanches Lopes, Mariane Grigio Francisco, Bruna Higashi, Rafaela Takako Ribeiro de Almeida, Gabriela Krausová, Eduardo Jorge Pilau, José Eduardo Gonçalves, Regina Aparecida Correia Gonçalves, Arildo José Braz de Oliveira
Stevia rebaudiana (Bertoni) is widely studied because of its foliar steviol glycosides. Fructan-type polysaccharides were recently isolated from its roots. Fructans are reserve carbohydrates that have important positive health effects and technological applications in the food industry. The objective of the present study was to isolate and characterize fructo-oligosaccharides (FOSs) from S. rebaudiana roots and in vitro adventitious root cultures and evaluate the potential prebiotic effect of these molecules...
November 5, 2016: Carbohydrate Polymers
https://www.readbyqxmd.com/read/27506238/the-allelochemical-mdca-inhibits-lignification-and-affects-auxin-homeostasis
#18
Ward Steenackers, Igor Cesarino, Petr Klíma, Mussa Quareshy, Ruben Vanholme, Sander Corneillie, Robert Peter Kumpf, Dorien Van de Wouwer, Karin Ljung, Geert Goeminne, Ondřej Novák, Eva Zažímalová, Richard Napier, Wout Boerjan, Bartel Vanholme
The phenylpropanoid 3,4-(methylenedioxy)cinnamic acid (MDCA) is a plant-derived compound first extracted from roots of Asparagus officinalis and further characterized as an allelochemical. Later on, MDCA was identified as an efficient inhibitor of 4-COUMARATE-CoA LIGASE (4CL), a key enzyme of the general phenylpropanoid pathway. By blocking 4CL, MDCA affects the biosynthesis of many important metabolites, which might explain its phytotoxicity. To decipher the molecular basis of the allelochemical activity of MDCA, we evaluated the effect of this compound on Arabidopsis thaliana seedlings...
October 2016: Plant Physiology
https://www.readbyqxmd.com/read/27478746/molecular-cloning-expression-analysis-and-subcellular-localization-of-four-della-genes-from-hybrid-poplar
#19
Sian Liu, Lei Xuan, Li-An Xu, Minren Huang, Meng Xu
Gibberellic acid (GA) signaling regulates diverse aspects of plant growth and developmental processes. The DELLA repressors of GA signaling are named for an N-terminal conserved DELLA domain. In this study, four genes encoding DELLA proteins, PeRGA1, PeRGA2, PeGAI1 and PeGAI2, were isolated and characterized in poplar. A gene structural analysis revealed that the DELLA genes were all intron-free. Multiple protein sequence alignments revealed that these proteins contained seven highly conserved domains: the DELLA domain, the TVHYNP domain, leucine heptad repeat I (LHR I), the VHIID domain, leucine heptad repeat II (LHR II), the PFYRE domain, and the SAM domain...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27446170/an-efficient-method-for-adventitious-root-induction-from-stem-segments-of-brassica-species
#20
Sandhya Srikanth, Tsui Wei Choong, An Yan, Jie He, Zhong Chen
Plant propagation via in vitro culture is a very laborious and time-consuming process. The growth cycle of some of the crop species is slow even in the field and the consistent commercial production is hard to maintain. Enhanced methods of reduced cost, materials and labor significantly impact the research and commercial production of field crops. In our studies, stem-segment explants of Brassica species were found to generate adventitious roots (AR) in aeroponic systems in less than a week. As such, the efficiency of rooting from stem explants of six cultivar varieties of Brassica spp was tested without using any plant hormones...
2016: Frontiers in Plant Science
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