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Adventitious root*

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https://www.readbyqxmd.com/read/29036625/ospht1-8-a-phosphate-transporter-is-involved-in-auxin-and-phosphate-starvation-response-in-rice
#1
Hongfang Jia, Songtao Zhang, Lizhi Wang, Yongxia Yang, Hongying Zhang, Hong Cui, Huifang Shao, Guohua Xu
The responses of plants to auxin and phosphate (Pi) starvation are closely linked. However, the underlying mechanisms connecting the Pi starvation (-Pi) responses to auxin are largely unclear. Here, we show that OsPht1;8 (OsPT8), a phosphate transporter, functions in both the auxin and -Pi responses in rice (Oryza sativa L.) and tobacco (Nicotiana tabacum). The overexpression of OsPT8 (OsPT8-Oe) led to the loss of sensitivity to auxin and -Pi in adventitious roots, lateral roots, and root hairs in rice. The expression levels of OsPT8 and pOsPT8::GUS staining in roots, root-shoot junctions and leaves of rice were induced by IAA treatments...
September 23, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29036435/the-wuschel-related-homeobox-5a-ptowox5a-is-involved-in-adventitious-root-development-in-poplar
#2
Jianbo Li, Jin Zhang, Huixia Jia, Bobin Liu, Pei Sun, Jianjun Hu, Lijuan Wang, Mengzhu Lu
Adventitious rooting is an essential step in vegetative propagation. Currently, the mechanism that regulates adventitious root (AR) development in woody plants is poorly understood. This work demonstrates that Populus tomentosa WUSCHEL-related homeobox 5a (PtoWOX5a) transcription factor is involved in AR development in poplar. PtoWOX5a was specifically expressed in the AR tip and lateral root tip during AR and lateral root regeneration from the stem segment. Phenotypic complementation experiments indicated that the PtoWOX5a can functionally complement AtWOX5 in quiescent center (QC) cells...
September 26, 2017: Tree Physiology
https://www.readbyqxmd.com/read/29025393/molecular-basis-of-african-yam-domestication-analyses-of-selection-point-to-root-development-starch-biosynthesis-and-photosynthesis-related-genes
#3
Roland Akakpo, Nora Scarcelli, Hana Chaïr, Alexandre Dansi, Gustave Djedatin, Anne-Céline Thuillet, Bénédicte Rhoné, Olivier François, Karine Alix, Yves Vigouroux
BACKGROUND: After cereals, root and tuber crops are the main source of starch in the human diet. Starch biosynthesis was certainly a significant target for selection during the domestication of these crops. But domestication of these root and tubers crops is also associated with gigantism of storage organs and changes of habitat. RESULTS: We studied here, the molecular basis of domestication in African yam, Dioscorea rotundata. The genomic diversity in the cultivated species is roughly 30% less important than its wild relatives...
October 12, 2017: BMC Genomics
https://www.readbyqxmd.com/read/29021804/calcium-and-calmodulin-are-involved-in-nitric-oxide-induced-adventitious-rooting-of-cucumber-under-simulated-osmotic-stress
#4
Lijuan Niu, Jian Yu, Weibiao Liao, Jihua Yu, Meiling Zhang, Mohammed M Dawuda
Osmotic stress is a major form of abiotic stress that adversely affects growth and development of plants and subsequently reduces yield and quality of crops. In this study, the effect of nitric oxide (NO) and calcium (Ca(2+)) on the process of adventitious rooting in cucumber (Cucumis sativus L.) under simulated osmotic stress was investigated. The results revealed that the effect of exogenous NO and Ca(2+) in promoting the development of adventitious roots in cucumber seedlings under simulated osmotic stress was dose-dependent, with a maximal biological response at 10 μM NO donor nitroprusside (SNP) or 200 μM Ca(2+)...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28993735/comparative-physiological-biochemical-and-genetic-responses-to-prolonged-waterlogging-stress-in-okra-and-maize-given-exogenous-ethylene-priming
#5
Emuejevoke Vwioko, Onyekachukwu Adinkwu, Mohamed A El-Esawi
Waterlogging is an environmental challenge affecting crops worldwide. Ethylene induces the expression of genes linked to important agronomic traits under waterlogged conditions. The ability of okra (Abelmoschus esculentus L. Moench.) and maize (Zea mays L.) given exogenous ethylene priming to tolerate prolonged waterlogged conditions was investigated in this study. The investigation was carried out as field experiments using 3 week-old plants grouped into four treatments; control, waterlogged plants, ethylene priming of plants before waterlogging, and ethylene priming of plants after waterlogging...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28922771/a-specific-role-of-iron-in-promoting-meristematic-cell-division-during-adventitious-root-formation
#6
Alexander Hilo, Fahimeh Shahinnia, Uwe Druege, Philipp Franken, Michael Melzer, Twan Rutten, Nicolaus von Wirén, Mohammad-Reza Hajirezaei
Adventitious root (AR) formation is characterized by a sequence of physiological and morphological processes and determined by external factors, including mineral nutrition, the impacts of which remain largely elusive. Morphological and anatomical evaluation of the effects of mineral elements on AR formation in leafy cuttings of Petunia hybrida revealed a striking stimulation by iron (Fe) and a promotive action of ammonium (NH4+). The optimal application period for these nutrients corresponded to early division of meristematic cells in the rooting zone and coincided with increased transcript levels of mitotic cyclins...
July 10, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28912792/genotypic-variation-in-yield-yield-components-root-morphology-and-architecture-in-soybean-in-relation-to-water-and-phosphorus-supply
#7
Jin He, Yi Jin, Yan-Lei Du, Tao Wang, Neil C Turner, Ru-Ping Yang, Kadambot H M Siddique, Feng-Min Li
Water shortage and low phosphorus (P) availability limit yields in soybean. Roots play important roles in water-limited and P-deficient environment, but the underlying mechanisms are largely unknown. In this study we determined the responses of four soybean [Glycine max (L.) Merr.] genotypes [Huandsedadou (HD), Bailudou (BLD), Jindou 21 (J21), and Zhonghuang 30 (ZH)] to three P levels [applied 0 (P0), 60 (P60), and 120 (P120) mg P kg(-1) dry soil to the upper 0.4 m of the soil profile] and two water treatment [well-watered (WW) and water-stressed (WS)] with special reference to root morphology and architecture, we compared yield and its components, root morphology and root architecture to find out which variety and/or what kind of root architecture had high grain yield under P and drought stress...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28840683/-characterization-of-tissue-expression-of-ginsenoside-biosynthetic-gene-expression-in-panax-ginseng
#8
Juan Liu, Rui-Feng Ji, Tong Chen, Yuan Yuan, Juan Guo, Ying-Ping Wang, Wen-Yuan Gao, Lu-Qi Huang
The study is aimed to characterize the tissue expression of 10 key ginsenoside biosynthetic genes using bioinformatics method and real-time quantitative PCR. Heatmap and cluster analysis of 10 ginsenoside biosynthetic genes were performed in four-year-old Jilin ginseng. Using real-time quantitative PCR, the expression correlation of 10 key genes involved in ginsenoside biosynthesis was analyzed in different organs of four-year-old Jilin ginseng including, tissue culture seedling and adventitious root. Pearson correlation was used to analyze the relation between those 10 key genes involved in ginsenoside biosynthesis...
July 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28819197/mortierella-alpina-cs10e4-an-oleaginous-fungal-endophyte-of-crocus-sativus-l-enhances-apocarotenoid-biosynthesis-and-stress-tolerance-in-the-host-plant
#9
Zahoor Ahmed Wani, Amit Kumar, Phalisteen Sultan, Kushal Bindu, Syed Riyaz-Ul-Hassan, Nasheeman Ashraf
Crocus sativus is the only plant species which produces apocarotenoids like crocin, picrocrocin and safranal in significant amounts. These compounds impart organoleptic properties to saffron (dried stigmas of Crocus flower) making it world's costliest spice. Crocus apocarotenoids have tremendous medicinal properties as well. Effect of endophytes on Crocus apocarotenoid production and the molecular mechanism involved has not been reported so far. Here we studied the effect of an oleaginous fungal endophyte, Mortierella alpina CS10E4 on Crocus growth, apocarotenoid metabolism and tolerance to corm rot disease...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28794929/high-frequency-direct-shoot-organogenesis-of-leaf-explants-and-a-comparative-evaluation-of-phytochemicals-antioxidant-potential-of-wild-vs-in-vitro-plant-extracts-of-lysimachia-laxa
#10
Sanjoy Gupta, Tapan Seal, A A Mao, Soneswar Sarma
The present studies were attempted to develop direct shoot organogenesis from in vitro grown leaf explants of Lysimachia laxa and comparative evaluation of phytochemical and antioxidant potential of in vitro raised and wild plants extracts. The fresh leaves of this species are used for deworming gastrointestinal worm infection in traditional medicine. Overexploitation of this species and poor regeneration has led to rapid decline in wild population, therefore, present investigation was attempted to develop an efficient rapid mass propagation protocol for this species...
August 2017: 3 Biotech
https://www.readbyqxmd.com/read/28755334/optimized-direct-organogenesis-from-shoot-tip-explants-of-date-palm
#11
Rehab Sidky
In vitro propagation is an available alternative to produce uniform and good-quality planting material to establish large-scale date palm cultivation in a short time. This study was carried out to achieve organogenesis and multiplication directly from shoot tips without callus formation, thus avoiding any possibility of undesirable genetic variability among the regenerated plants. The shoot tips explants are cultured on Murashige and Skoog (MS) medium supplemented with 1 mg/L naphthaleneacetic acid (NAA), 1 mg/L naphthoxyacetic acid (NOA), 2...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28755333/direct-organogenesis-from-immature-female-inflorescence-of-date-palm-by-gradual-reduction-of-2-4-d-concentration
#12
Ezz El-Din G Gadalla
Inflorescences represent an alternative explant source for superior date palm trees, especially those that do not produce offshoots. They provide large numbers of explants free of fungal and bacterial contamination for successful tissue culture initiation. Furthermore, they are characterized by the capacity of plant regeneration within a short time as compared to other explant types. This chapter focuses on the procedures employed for plant regeneration by direct organogenesis using immature female inflorescence explants, including initiation of adventitious buds, differentiation, multiplication, shoot elongation, rooting, and acclimatization...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28755332/naa-induced-direct-organogenesis-from-female-immature-inflorescence-explants-of-date-palm
#13
Hussam S M Khierallah, Saleh M Bader, Makki A Al-Khafaji
Micropropagation has great potential for the multiplication of female and male date palms of commercially grown cultivars by using inflorescences. This approach is simple, convenient, and much faster than the conventional method of using shoot-tip explants. We describe here a stepwise micropropagation procedure using inflorescence explants of Iraqi date palm cultivar Maktoom. Cultured explants were derived from 0.5-cm-long spike segments excised from 8 to 10-cm-long spathes. About 70% formed adventitious buds on Murashige and Skoog (MS) medium supplemented with 2 mg/L naphthalene acetic acid (NAA), 4 mg/L benzylaminopurine (BAP), and 40 g/L sucrose and maintained in the dark for 16 weeks before transferring to normal light conditions...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28751314/biosynthesis-of-diterpenoids-in-tripterygium-adventitious-root-cultures
#14
Fainmarinat S Inabuy, Justin T Fischedick, Iris Lange, Michael Hartmann, Narayanan Srividya, Amber N Parrish, Meimei Xu, Reuben J Peters, B Markus Lange
Adventitious root cultures were developed from Tripterygium regelii, and growth conditions were optimized for the abundant production of diterpenoids, which can be collected directly from the medium. An analysis of publicly available transcriptome data sets collected with T. regelii roots and root cultures indicated the presence of a large gene family (with 20 members) for terpene synthases (TPSs). Nine candidate diterpene synthase genes were selected for follow-up functional evaluation, of which two belonged to the TPS-c, three to the TPS-e/f, and four to the TPS-b subfamilies...
September 2017: Plant Physiology
https://www.readbyqxmd.com/read/28747975/blood-flow-improving-activity-of-methyl-jasmonate-treated-adventitious-roots-of-mountain-ginseng
#15
Young-Hwan Ban, Yeseul Cha, Jieun Choi, Eun Suk An, Ji Young Lee, Nu Ry Han, Da Woom Seo, Gooyoung Jung, Da-Hye Jeong, Man Hee Rhee, Ehn-Kyoung Choi, Yun-Bae Kim
Ginsenosides from Panax ginseng are well known for their diverse pharmacological effects including antithrombotic activity. Since adventitious roots of mountain ginseng (ARMG) also contain various ginsenosides, blood flow-improving effects of the dried powder and extract of ARMG were investigated. Rats were orally administered with dried powder (PARMG) or ethanol extract (EARMG) of ARMG (125, 250 or 500 mg/kg) or aspirin (30 mg/kg, a reference control) for 3 weeks. Forty min after the final administration, carotid arterial thrombosis was induced by applying a 70% FeCl3-soaked filter paper outside the arterial wall for 5 min, and the blood flow was monitored with a laser Doppler probe...
June 2017: Laboratory Animal Research
https://www.readbyqxmd.com/read/28747176/comparative-rna-seq-based-transcriptome-profiling-of-waterlogging-response-in-cucumber-hypocotyls-reveals-novel-insights-into-the-de-novo-adventitious-root-primordia-initiation
#16
Xuewen Xu, Minyang Chen, Jing Ji, Qiang Xu, Xiaohua Qi, Xuehao Chen
BACKGROUND: Waterlogging is a serious abiotic stress to plant growth because it results in the decline in the supplement of oxygen to submerged tissues. Although cucumber (Cucumis sativus L.) is sensitive to waterlogging, its ability to generate adventitious roots (ARs) facilitates gas diffusion and increases plant survival when the oxygen concentration is decreased. To gain a better understanding of the molecular mechanisms that enable de novo AR primordia emergence upon waterlogging, the RNA sequencing-based transcriptomic responses of two contrasting cucumber genotypes, Zaoer-N (waterlogging tolerant) and Pepino (waterlogging sensitive), which differed in their abilities to form AR were compared...
July 26, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28743799/non-canonical-wox11-mediated-root-branching-contributes-to-plasticity-in-arabidopsis-root-system-architecture
#17
Lihong Sheng, Xiaomei Hu, Yujuan Du, Guifang Zhang, Hai Huang, Ben Scheres, Lin Xu
Lateral roots (LRs), which originate from the growing root, and adventitious roots (ARs), which are formed from non-root organs, are the main contributors to the post-embryonic root system in Arabidopsis However, our knowledge of how formation of the root system is altered in response to diverse inductive cues is limited. Here, we show that WOX11 contributes to root system plasticity. When seedlings are grown vertically on medium, WOX11 is not expressed in LR founder cells. During AR initiation, WOX11 is expressed in AR founder cells and activates LBD16LBD16 also functions in LR formation and is activated in that context by ARF7/19 and not by WOX11 This indicates that divergent initial processes that lead to ARs and LRs may converge on a similar mechanism for primordium development...
September 1, 2017: Development
https://www.readbyqxmd.com/read/28733871/a-mdr-transporter-contributes-to-the-different-extracellular-production-of-sesquiterpene-pyridine-alkaloids-between-adventitious-root-and-hairy-root-liquid-cultures-of-tripterygium-wilfordii-hook-f
#18
Guo-Peng Miao, Juan Han, Ji-Feng Zhang, Chuan-Shu Zhu, Xing Zhang
TwMDR1 transports sesquiterpene pyridine alkaloids, wilforine and wilforgine, into the hairy roots of T. wilfordii Hook.f. resulting in low secretion ratio of alkaloids. Hairy roots (HRs) exhibit high growth rate and biochemical and genetic stability. However, varying secondary metabolites in HR liquid cultures mainly remain in root tissues, and this condition may affect cell growth and cause inconvenience in downstream extraction. Studies pay less attention to adventitious root (AR) liquid cultures though release ratio of some metabolites in AR liquid cultures is significantly higher than that of HR...
July 21, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28729662/erratum-the-arabidopsis-cop9-signalosome-subunit-4-csn4-is-involved-in-adventitious-root-formation
#19
Daniel Ioan Pacurar, Monica Lacramioara Pacurar, Abdellah Lakehal, Andrea Mariana Pacurar, Alok Ranjan, Catherine Bellini
A correction to this article has been published and is linked from the HTML version of this paper. The error has been fixed in the paper.
July 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28726763/cloning-and-characterization-of-thshrs-and-thscr-transcription-factors-in-taxodium-hybrid-zhongshanshan-406
#20
Zhiquan Wang, Yunlong Yin, Jianfeng Hua, Wencai Fan, Chaoguang Yu, Lei Xuan, Fangyuan Yu
Among the GRAS family of transcription factors, SHORT ROOT (SHR) and SCARECROW (SCR) are key regulators of the formation of root tissues. In this study, we isolated and characterized two genes encoding SHR proteins and one gene encoding an SCR protein: ThSHR1 (Accession Number MF045148), ThSHR2 (Accession Number MF045149) and ThSCR (Accession Number MF045152) in the adventitious roots of Taxodium hybrid 'Zhongshanshan'. Gene structure analysis indicated that ThSHR1, ThSHR2 and ThSCR are all intron free. Multiple protein sequence alignments showed that each of the corresponding proteins, ThSHR1, ThSHR2 and ThSCR, contained five well-conserved domains: leucine heptad repeat I (LHRI), the VHIID motif, leucine heptad repeat II (LHR II), the PFYRE motif, and the SAW motif...
July 20, 2017: Genes
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