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Adventitious root

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https://www.readbyqxmd.com/read/29788353/hormonal-regulation-in-adventitious-roots-and-during-their-emergence-under-waterlogged-conditions-in-wheat-triticum-aestivum-l
#1
Tran-Nguyen Nguyen, Pham Anh Tuan, Shalini Mukherjee, SeungHyun Son, Belay T Ayele
To gain insights into the molecular mechanisms underlying hormonal regulation in adventitious roots and during their emergence under waterlogged conditions in wheat, the present study investigated transcriptional regulation of genes related to hormone metabolism and transport in the root and stem node tissues. Waterlogging-induced inhibition of axile root elongation and lateral root formation, and promotion of surface adventitious and axile root emergence and aerenchyma formation are associated with enhanced expression levels of ethylene biosynthesis genes, ACS7 and ACO2, in both tissues...
May 18, 2018: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29778014/expression-of-grape-acs1-in-tomato-decreases-ethylene-and-alters-the-balance-between-auxin-and-ethylene-during-shoot-and-root-formation
#2
Xia Ye, Mengmeng Fu, Yu Liu, Dongliang An, Xianbo Zheng, Bin Tan, Jidong Li, Jun Cheng, Wei Wang, Jiancan Feng
Ethylene plays an important role in the grape rachis, where its production can be 10 times higher than in the berry. VvACS1 is the only rachis-specific ACC synthase (ACS) gene, and its expression is coincident with ethylene production in the rachis of Vitis vinifera 'Thompson seedless'. VvACS1 was cloned and ectopically expressed in tomato (Solanum lycopersicum 'Moneymaker'). Lateral buds were increased in two- or four-week-old 35s∷VvACS1 transgenic tomato plants after transplanting. Compared with wild-type (WT) plants, the transgenic tomato plants showed higher expression of the VvACS1 gene in the flowers, leaves, rachis, and fruits...
May 4, 2018: Journal of Plant Physiology
https://www.readbyqxmd.com/read/29774547/petunia-as-model-for-elucidating-adventitious-root-formation-and-mycorrhizal-symbiosis-at-the-nexus-of-physiology-genetics-microbiology-and-horticulture
#3
Uwe Druege, Philipp Franken
Adventitious root formation in cuttings and establishment of arbuscular mycorrhizal symbiosis reflect the enormous plasticity of plants and are key factors in the efficient and sustainable clonal propagation and production of ornamental crops. Based on the high importance of Petunia hybrida for the European and US annual bedding plant markets and its suitability as a model for basic plant sciences, petunia has been established as an experimental system for elucidating the molecular and physiological processes underlying adventitious root formation and mycorrhizal symbiosis...
May 17, 2018: Physiologia Plantarum
https://www.readbyqxmd.com/read/29755501/enhanced-conjugation-of-auxin-by-gh3-enzymes-leads-to-poor-adventitious-rooting-in-carnation-stem-cuttings
#4
Antonio Cano, Ana Belén Sánchez-García, Alfonso Albacete, Rebeca González-Bayón, María Salud Justamante, Sergio Ibáñez, Manuel Acosta, José Manuel Pérez-Pérez
Commercial carnation ( Dianthus caryophyllus ) cultivars are vegetatively propagated from axillary stem cuttings through adventitious rooting; a process which is affected by complex interactions between nutrient and hormone levels and is strongly genotype-dependent. To deepen our understanding of the regulatory events controlling this process, we performed a comparative study of adventitious root (AR) formation in two carnation cultivars with contrasting rooting performance, "2101-02 MFR" and "2003 R 8", as well as in the reference cultivar "Master"...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29744274/genetic-linkage-map-and-qtl-identification-for-adventitious-rooting-traits-in-red-gum-eucalypts
#5
Murugan Sumathi, Vijaya Kumar Waman Bachpai, A Mayavel, Modhumita Ghosh Dasgupta, Binai Nagarajan, D Rajasugunasekar, Veerasamy Sivakumar, Ramasamy Yasodha
The eucalypt species, Eucalyptus tereticornis and Eucalyptus camaldulensis , show tolerance to drought and salinity conditions, respectively, and are widely cultivated in arid and semiarid regions of tropical countries. In this study, genetic linkage map was developed for interspecific cross E. tereticornis  ×  E. camaldulensis using pseudo-testcross strategy with simple sequence repeats (SSRs), intersimple sequence repeats (ISSRs), and sequence-related amplified polymorphism (SRAP) markers. The consensus genetic map comprised totally 283 markers with 84 SSRs, 94 ISSRs, and 105 SRAP markers on 11 linkage groups spanning 1163...
May 2018: 3 Biotech
https://www.readbyqxmd.com/read/29720823/-in-vitro-induction-and-generation-of-tetraploid-plants-of-sophora-tonkinensis-gapnep
#6
Kun Hua Wei, Jian Ping Xu, Lin Xuan Li, Jin Yuan Cai, Jian Hua Miao, Min Hui Li
Background: Sophora tonkinensis Gapnep. is an important medical plant in China. Early researches of S. tonkinensis were focused on rapid propagation and quality analysis of in vitro tissue culture plantlet, and still no research focuses on the plant breeding of and there were no excellent varieties for artificial cultivation of S. tonkinensis . Objective: To set up a method to generate and select the best varieties of S. tonkinensis by polyploid breeding after induction by colchicine treatment...
April 2018: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29709027/a-comprehensive-phylogeny-of-auxin-homeostasis-genes-involved-in-adventitious-root-formation-in-carnation-stem-cuttings
#7
Ana Belén Sánchez-García, Sergio Ibáñez, Antonio Cano, Manuel Acosta, José Manuel Pérez-Pérez
Understanding the functional basis of auxin homeostasis requires knowledge about auxin biosynthesis, auxin transport and auxin catabolism genes, which is not always directly available despite the recent whole-genome sequencing of many plant species. Through sequence homology searches and phylogenetic analyses on a selection of 11 plant species with high-quality genome annotation, we identified the putative gene homologs involved in auxin biosynthesis, auxin catabolism and auxin transport pathways in carnation (Dianthus caryophyllus L...
2018: PloS One
https://www.readbyqxmd.com/read/29701164/characterization-biometric-and-morphophysiological-of-peach-rootstock-seeds-using-images-of-their-seedling-vigor
#8
Aline Das Graças Souza, Oscar Jose Smiderle, Valmor Joao Bianchi
BACKGROUND: This study aimed to evaluate the efficiency of using the computerized imaging seed analysis system (SAS) in the biometric and morphophysiological characterization of seeds and the initial growth of seedlings from peach rootstocks. METHODS: The experimental design was completely randomized with five replicates of 20 seeds. The variables analyzed were degree of seed humidity, length and width of seeds measured by SAS technology and manual measurements, mean germination time, germination percentage, radicle length and width, taproot length, length of the aerial part and taproot/aerial part ratio...
April 26, 2018: Recent Patents on Food, Nutrition & Agriculture
https://www.readbyqxmd.com/read/29692105/-effects-of-ca-2-on-nitric-oxide-induced-adventitious-rooting-in-cucumber-under-drought-stress
#9
Chun Lan Li, Li Juan Niu, Lin Li Hu, Wei Biao Liao, Yue Chen
Cucumber (Cucumis sativus L. 'Xinchun 4') was used to explore the relationship between nitric oxide (NO) and calcium (Ca2+ ) during adventitious rooting under drought stress. Rooting parameters, endogenous Ca2+ fluorescent intensity and the antioxidant enzymes activity (SOD, CAT and APX) in cucumber explants under drought stress were investigated. The results showed that treatment with 200 μmol·L-1 CaCl2 and 0.05% PEG significantly improved the number and length of adventitious root in cucumber explants under drought stress, while the application of Ca2+ chelating agent (EGTA) and channel inhibitor (BAPTA/AM) significantly decreased NO-induced number and length of adventitious root under drought stress...
November 2017: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29680635/recruitment-of-ic-wox-genes-in-root-evolution
#10
REVIEW
Wu Liu, Lin Xu
Root evolution has resulted in the extant bifurcating roots in lycophytes, adventitious/lateral roots in euphyllophytes (ferns and seed plants), and primary roots in seed plants. Here, we hypothesize a role for intermediate-clade-WUSCHEL-RELATED HOMEOBOX (IC-WOX) genes in root evolution. IC-WOX might not be specifically involved in lycophyte bifurcation rooting. In the fern Ceratopteris richardii, IC-WOX is expressed in adventitious/lateral root founder cells. In the seed plant Arabidopsis thaliana, there are two IC-WOX subclades, AtWOX11/12 and AtWOX8/9, in adventitious and primary root founder cells, respectively...
April 18, 2018: Trends in Plant Science
https://www.readbyqxmd.com/read/29666352/quantitative-trait-loci-mapping-for-stomatal-traits-in-interspecific-hybrids-of-eucalyptus
#11
M Sumathi, V K W Bachpai, B Deeparaj, A Mayavel, Modhumita Ghosh Dasgupta, B Nagarajan, D Rajasugunasekar, V Sivakumar, R Yasodha
Eucalyptus is an important industrial species with tolerance to drought and salt stress. Genetic improvement activities including quantitative trait loci (QTL) mapping for pulping and adventitious rooting traits are in progress, but no information is available on the genomic regions on adaptive traits such as stomatal characteristics. In this study, an interspecific cross between Eucalyptus tereticornis and E. grandis was generated for the development of genetic map and QTL identification for stomatal traits...
March 2018: Journal of Genetics
https://www.readbyqxmd.com/read/29628977/erratum-blood-flow-improving-activity-of-methyl-jasmonate-treated-adventitious-roots-of-mountain-ginseng
#12
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
[This corrects the article on p. 105 in vol. 33, PMID: 28747975.].
March 2018: Laboratory Animal Research
https://www.readbyqxmd.com/read/29604522/comparative-adventitious-root-development-in-pre-etiolated-and-flooded-arabidopsis-hypocotyls-exposed-to-different-auxins
#13
Cibele Tesser da Costa, Marcos Letaif Gaeta, Jorge Ernesto de Araujo Mariath, Remko Offringa, Arthur Germano Fett-Neto
Adventitious roots (ARs) emerge from stems, leaves or hypocotyls, being strategic for clonal propagation. ARs may develop spontaneously, upon environmental stress or hormonal treatment. Auxins strongly influence AR development (ARD), depending on concentration and kind. However, the role of different types of auxin is rarely compared at the molecular level. Rooting triggered by light exposure and flooding was examined in intact etiolated Arabidopsis thaliana hypocotyls treated with distinct auxin types. Morphological aspects, rooting-related gene expression profiles, and IAA immunolocalization were recorded...
March 21, 2018: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29603748/adventitious-lateral-rooting-the-plasticity-of-root-system-architecture
#14
Yachao Ge, Xing Fang, Wu Liu, Lihong Sheng, Lin Xu
Root formation under natural conditions is plastic in response to multiple signals. Recent studies suggested that the WUSCHEL-RELATED HOMEOBOX11 (WOX11)-mediated adventitious root (AR) formation pathway can occur in the primary root (PR) in Arabidopsis thaliana, resulting in the production of a specific type of lateral roots (LRs) in response to wounding or environmental signals. This process differs from the previously characterized process for LR development, which does not require WOX11. The WOX11-mediated PR-derived roots can be considered like LRs that exhibit an "adventitious" feature...
March 30, 2018: Physiologia Plantarum
https://www.readbyqxmd.com/read/29579267/myosin-xi-k-is-involved-in-root-organogenesis-polar-auxin-transport-and-cell-division
#15
Mohamad Abu-Abied, Eduard Belausov, Sapir Hagay, Valera Peremyslov, Valerian Dolja, Einat Sadot
The interplay between myosin- and auxin-mediated processes was investigated by following root development in the triple myosin knockout mutant xi-k xi-1 xi-2 (3KO). It was found that the 3KO plants generated significantly more lateral and adventitious roots than the wild type plants or rescued plant line expressing functional myosin XI-K:YFP (3KOR). Using the auxin-dependent reporter DR5:venus, a significant change in the auxin gradient toward the root tip was found in 3KO plants, which correlated with the loss of polar localization of the auxin transporter PIN1 in the stele and with the increased number of the stele cells with oblique cell walls...
March 22, 2018: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29574325/a-disturbed-auxin-signaling-affects-adventitious-root-outgrowth-in-solanum-dulcamara-under-complete-submergence
#16
Xinping Yang, Martijn J Jansen, Qian Zhang, Lidiya Sergeeva, Wilco Ligterink, Celestina Mariani, Ivo Rieu, Eric J W Visser
Flooding negatively affects the growth and even survival of most terrestrial plants. Upon flooding, the excess water quickly decreases the gas exchange between atmosphere and the submerged plant tissues, which leads to oxygen deficiency resulting in a plant cell energy crisis, and eventually plant death. Solanum dulcamara survives flooding by producing aerenchymatous adventitious roots (ARs) from pre-formed primordia on the stem, which replace the original flood-sensitive root system. However, we found that under complete submergence, AR outgrowth was impaired in S...
March 19, 2018: Journal of Plant Physiology
https://www.readbyqxmd.com/read/29573430/contribution-of-adventitious-vs-initial-roots-to-growth-and-physiology-of-black-spruce-seedlings
#17
Clémentine Pernot, Nelson Thiffault, Annie DesRochers
Black spruce (Picea mariana (Mill.) BSP) is a boreal tree species characterized by the formation of an adventitious root system. Unlike initial roots from seed germination, adventitious roots gradually appear above the root collar, until they constitute most of mature black spruce root system. Little is known about the physiological role they play and their influence on tree growth relative to initial roots. We hypothesized that adventitious roots present an advantage over initial roots in acquiring water and nutrients...
March 24, 2018: Physiologia Plantarum
https://www.readbyqxmd.com/read/29560544/anti-cancer-labdane-diterpenoids-from-adventitious-roots-of-andrographis-paniculata-augmentation-of-production-prospect-endowed-with-pathway-gene-expression
#18
Sailendra Singh, Pallavi Pandey, Sumit Ghosh, Suchitra Banerjee
Andrographolide (AD) is the time-honoured pharmacologically active constituent of the traditionally renowned medicinal plant-Andrographis paniculata. Advancements in the target-oriented drug discovery process have further unravelled the immense therapeutic credibility of another unique molecule-neoandrographolide (NAD). The escalated market demand of these anti-cancer diterpenes is increasingly facing unrelenting hurdles of demand and supply disparity, attributable to their limited yield. Callus and adventitious root cultures were generated to explore their biosynthetic potentials which first time revealed NAD production along with AD...
March 20, 2018: Protoplasma
https://www.readbyqxmd.com/read/29525951/in-vitro-assay-for-induction-of-adventitious-rooting-on-intact-arabidopsis-hypocotyls
#19
Hoang Khai Trinh, Inge Verstraeten, Danny Geelen
Adventitious roots (AR) are de novo formed roots that emerge from any part of the plant or from callus in tissue culture, except root tissue. The plant tissue origin and the method by which they are induced determine the physiological properties of emerged ARs. Hence, a standard method encompassing all types of AR does not exist. Here we describe a method for the induction and analysis of AR that emerge from the etiolated hypocotyl of dicot plants. The hypocotyl is formed during embryogenesis and shows a determined developmental pattern which usually does not involve AR formation...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29520811/a-major-natural-genetic-variation-associated-with-root-system-architecture-and-plasticity-improves-waterlogging-tolerance-and-yield-in-soybean
#20
Heng Ye, Li Song, Huatao Chen, Babu Valliyodan, Peng Cheng, Liakat Ali, Tri Vuong, Chengjun Wu, John Orlowski, Blair Buckley, Pengyin Chen, J Grover Shannon, Henry T Nguyen
Natural genetic variations in waterlogging tolerance are controlled by multiple genes mapped as quantitative trait loci (QTLs) in major crops, including soybean (Glycine max L.). In this research, 2 novel QTLs associated with waterlogging tolerance were mapped from an elite/exotic soybean cross. The subsequent research was focused on a major QTL (qWT_Gm03) with the tolerant allele from the exotic parent. This QTL was isolated into near-isogenic backgrounds, and its effects on waterlogging tolerance were validated in multiple environments...
March 8, 2018: Plant, Cell & Environment
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