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"Adventitious rooting"

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https://www.readbyqxmd.com/read/29438577/a-bahd-acyltransferase-catalyzing-19-o-acetylation-of-tabersonine-derivatives-in-roots-of-catharanthus-roseus-enables-combinatorial-synthesis-of-monoterpene-indole-alkaloids
#1
Inês Carqueijeiro, Thomas Dugé de Bernonville, Arnaud Lanoue, Thu-Thuy Dang, Christiana Teijaro, Christian Paetz, Kevin Billet, Angela Mosquera, Audrey Oudin, Sébastien Besseau, Nicolas Papon, Gaëlle Glévarec, Lucia Atehortùa, Marc Clastre, Nathalie Giglioli-Guivarc'h, Bernd Schneider, Benoit St-Pierre, Rodrigo B Andrade, Sarah E O'Connor, Vincent Courdavault
While the characterization of the biosynthetic pathway of monoterpene indole alkaloids (MIAs) in leaves of Catharanthus roseus is now reaching completion, only two enzymes from the root counterpart dedicated to tabersonine metabolism have been identified to date, namely tabersonine 19-hydroxylase (T19H) and minovincine 19-O-acetyltransferase (MAT). Albeit the recombinant MAT catalyzes MIA acetylation at low efficiency in vitro, we demonstrated that MAT was inactive when expressed in yeast and in planta, suggesting an alternative function for this enzyme...
February 13, 2018: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/29432208/transcriptome-profiling-reveals-an-iaa-regulated-response-to-adventitious-root-formation-in-lotus-seedling
#2
Cheng Libao, Jiang Runzhi, Yang Jianjun, Xu Xiaoyong, Zeng Haitao, Li Shuyan
Adventitious roots (ARs) of lotus (Nelumbonucifera Gaertn.) play a critical role in water and nutrient uptake. We found that exogenously applied 10-μM indole-3-acetic acid (IAA) promoted the formation of ARs, while 150-μM IAA significantly inhibited the emergence of ARs. However, little is known about these different responses to various concentrations of IAA at the molecular level. This study, therefore, examined the gene expression profiling in four libraries treated with 10- and 150-μM IAA based on the high-throughout tag sequencing technique...
February 12, 2018: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/29425277/global-analysis-of-an-exponential-model-of-cell-proliferation-for-estimation-of-cell-cycle-duration-in-the-root-apical-meristem-of-angiosperms
#3
Natalia V Zhukovskaya, Elena I Bystrova, Joseph G Dubrovsky, Victor B Ivanov
Background and Aims: Information on cell cycle duration (T) in the root apical meristem (RAM) provides insight into root growth, development and evolution. We have previously proposed a simple method for evaluating T based on the dynamics of root growth (V), the number of cells in the RAM (Nm) and the length of fully elongated cells (l), which we named the rate-of-cell-production (RCP) method. Here, a global analysis was performed to confirm the reliability of this method in a range of angiosperm species and to assess the advantages of this approach...
February 7, 2018: Annals of Botany
https://www.readbyqxmd.com/read/29398848/aeroponics-for-adventitious-rhizogenesis-in-evergreen-haloxeric-tree-tamarix-aphylla-l-karst-influence-of-exogenous-auxins-and-cutting-type
#4
Udit Sharma, Vinod Kataria, N S Shekhawat
Tamarix aphylla (L.) Karst., a drought resistant halophyte tree, is an agroforestry species which can be used for reclamation of waterlogged saline and marginal lands. Due to very low seed viability and unsuitable conditions for seed germination, the tree is becoming rare in Indian Thar desert. Present study concerns the evaluation of aeroponics technique for vegetative propagation of T. aphylla. Effect of various exogenous auxins (indole-3-acetic acid, indole-3-butyric acid, naphthalene acetic acid) at different concentrations (0...
February 2018: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
https://www.readbyqxmd.com/read/29378021/localized-gene-expression-changes-during-adventitious-root-formation-in-black-walnut-juglans-nigra-l
#5
Micah E Stevens, Keith E Woeste, Paula M Pijut
Cutting propagation plays a large role in the forestry and horticulture industries where superior genotypes need to be clonally multiplied. Integral to this process is the ability of cuttings to form adventitious roots. Recalcitrance to adventitious root development is a serious hurdle for many woody plant propagation systems including black walnut (Juglans nigra L.), an economically valuable species. The inability of black walnut to reliably form adventitious roots limits propagation of superior genotypes...
January 25, 2018: Tree Physiology
https://www.readbyqxmd.com/read/29349493/biotic-elicitation-of-ginsenoside-metabolism-of-mutant-adventitious-root-culture-in-panax-ginseng
#6
Kim-Cuong Le, Wan-Taek Im, Kee-Yoeup Paek, So-Young Park
Biotic elicitation is an important biotechnological strategy for triggering the accumulation of secondary metabolites in adventitious root cultures. These biotic elicitors can be obtained from safe, economically important strains of bacteria found in the rhizosphere and fermented foods. Here, we assayed the effects of filtered cultures of five nitrogen-fixing bacteria and four types of fermentation bacteria on mutant adventitious Panax ginseng root cultures induced in a previous study by colchicine treatment...
January 18, 2018: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29315927/the-major-effect-qtl-csarn6-1-encodes-an-aaa-atpase-domain-containing-protein-that-is-associated-with-waterlogging-stress-tolerance-through-promoting-adventitious-root-formation
#7
Xuewen Xu, Jing Ji, Qiang Xu, Xiaohua Qi, Yiqun Weng, Xuehao Chen
In plants, the formation of hypocotyl-derived adventitious roots (AR) is an important morphological acclimation to waterlogging stress; however, its genetic basis remains fragmentary. Here, through combined use of bulked segregant analysis-based whole genome sequencing, SNP haplotyping and fine genetic mapping, we identified a candidate gene for a major-effect QTL ARN6.1 that was responsible for waterlogging tolerance due to increased AR formation in the cucumber line Zaoer-N. Through multiple lines of evidence, we show that the CsARN6...
January 8, 2018: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/29305802/effect-of-water-cadmium-concentration-and-water-level-on-the-growth-performance-of-salix-triandroides-cuttings
#8
Xin Yao, Fengfeng Ma, Youzhi Li, Xiaohui Ding, Dongsheng Zou, Yandong Niu, Hualin Bian, Jiajun Deng
The growth performance of Salix triandroides cuttings at three water cadmium (Cd) concentrations (0, 20, and 40 mg L-1) and three water levels (- 40 cm, water level 40 cm below the soil surface; 0 cm, water level even with the soil surface; and 40 cm, water level 40 cm above soil surface) was investigated to evaluate its potential in phytoextraction strategies. Compared to cuttings in the - 40 or 0 cm water levels, cuttings in the 40 cm water level showed significantly lower biomass, height, and adventitious root length and significantly fewer leaves and adventitious roots...
January 5, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29273862/heterorhizy-and-fine-root-architecture-of-rabbiteye-blueberry-vaccinium-virgatum-softwood-cuttings
#9
Takashi Baba, Satoshi Nakaba, Satoshi Noma, Ryo Funada, Takuya Ban
All fine root systems consist of individual fine roots. Individual roots have morphological, anatomical, and functional heterogeneity (heterorhizy). Heterorhizy plays crucial roles in plant ecosystems. However, in many species, the heterorhizy and fine root system architecture based on individual root units are unclear. This study investigated heterorhizy along the root system architecture of Vaccinium virgatum Ait (rabbiteye blueberry) softwood-cuttings (propagated from annual shoots in growing season) using protoxylem groups (PGs), a classification according to the number of protoxylem poles, as an indicator of individual root traits...
December 22, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/29249063/the-application-of-plant-in-vitro-cultures-in-cannabinoid-production
#10
REVIEW
Tomasz Wróbel, Mariola Dreger, Karolina Wielgus, Ryszard Słomski
Cannabinoids have considerable interest in the pharmaceutical industry. However, the production of medicines from hemp (Cannabis sativa L.) in most countries is restricted by law. Large-scale, field cultivation of hemp is difficult to control. Cannabinoid content in plants is variable and depends on multiple factors. Therefore, alternative methods of production have been investigated. The development of micropropagation techniques is a necessary step for genetic modification. Promising results have been obtained for certain narcotic genotypes...
December 16, 2017: Biotechnology Letters
https://www.readbyqxmd.com/read/29242375/control-of-adventitious-root-architecture-in-rice-by-darkness-light-and-gravity
#11
Chen Lin, Margret Sauter
Rice is a semiaquatic plant that is well adapted to partial flooding. Rice stems develop adventitious root (AR) primordia at each node that slowly mature but emerge only when the plant gets flooded leading to the formation of a whole new secondary root system upon flooding. AR growth is induced by ethylene that accumulates in submerged plant tissues due to its lowered diffusion rate in water. Here we report that the architecture of the secondary root system in flooded rice plants is not only controlled by altered gas diffusion but also by gravity and light...
December 14, 2017: Plant Physiology
https://www.readbyqxmd.com/read/29194427/control-of-endogenous-auxin-levels-in-plant-root-development
#12
REVIEW
Damilola Olatunji, Danny Geelen, Inge Verstraeten
In this review, we summarize the different biosynthesis-related pathways that contribute to the regulation of endogenous auxin in plants. We demonstrate that all known genes involved in auxin biosynthesis also have a role in root formation, from the initiation of a root meristem during embryogenesis to the generation of a functional root system with a primary root, secondary lateral root branches and adventitious roots. Furthermore, the versatile adaptation of root development in response to environmental challenges is mediated by both local and distant control of auxin biosynthesis...
December 1, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29186815/characterization-of-the-transcriptome-and-gene-expression-of-tetraploid-black-locust-cuttings-in-response-to-etiolation
#13
(no author information available yet)
Etiolation (a process of growing plants in partial or complete absence of light) promotes adventitious root formation in tetraploid black locust (Robinia pseudoacacia L.) cuttings. We investigated the mechanism underlying how etiolation treatment promotes adventitious root formation in tetraploid black locust and assessed global transcriptional changes after etiolation treatment. Solexa paired-end sequencing of complementary DNAs (cDNAs) from control (non-etiolated, NE) and etiolated (E) samples resulted in 107,564 unigenes...
November 24, 2017: Genes
https://www.readbyqxmd.com/read/29160805/indole-3-butyric-acid-induces-ectopic-formation-of-metaxylem-in-the-hypocotyl-of-arabidopsis-thaliana-without-conversion-into-indole-3-acetic-acid-and-with-a-positive-interaction-with-ethylene
#14
Laura Fattorini, Federica Della Rovere, Eleonora Andreini, Marilena Ronzan, Giuseppina Falasca, Maria Maddalena Altamura
The role of the auxins indole-3-acetic acid (IAA) and indole-3-butyric acid (IBA) and of the auxin-interacting phytohormone ethylene, on the ectopic formation of primary xylem (xylogenesis in planta) is still little known. In particular, auxin/ethylene-target tissue(s), modality of the xylary process (trans-differentiation vs. de novo formation), and the kind of ectopic elements formed (metaxylem vs. protoxylem) are currently unknown. It is also unclear whether IBA may act on the process independently of conversion into IAA...
November 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29138909/improvement-of-biosynthesis-and-accumulation-of-bioactive-compounds-by-elicitation-in-adventitious-root-cultures-of-polygonum-multiflorum
#15
Thanh-Tam Ho, Jong-Du Lee, Cheol-Seung Jeong, Kee-Yoeup Paek, So-Young Park
We examined the effects of abiotic (methyl jasmonate [MeJA] and salicylic acid [SA]) and biotic (yeast extract and chitosan) elicitors for improvement of bioactive compounds production on adventitious root cultures in Polygonum multiflorum. The application of yeast extract resulted in significantly (p ≤ 0.05) higher dry root biomass (9.98 g/L) and relative growth rate versus the control. Cultures treated with abiotic elicitors showed higher percentage of dry weight than the other samples. Low concentrations of all elicitors (50 μM MeJA and SA, and 50 mg/L yeast extract) improved secondary metabolite production except for chitosan, whose performance was worse than that of the control...
November 14, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29129002/histological-characterization-of-passiflora-pohlii-mast-root-tips-cryopreserved-using-the-v-cryo-plate-technique
#16
Mariela J Simão, Myriam Collin, Renata O Garcia, Elisabeth Mansur, Georgia Pacheco, Florent Engelmann
Cryopreservation stands out as the main strategy to ensure safe and cost efficient long-term conservation of plant germplasm, especially for biotechnological materials. However, the injuries associated with the procedure may result in structural damage and low recovery rates after cooling. Histological analysis provides useful information on the effects of osmotic dehydration, LN exposure, and recovery conditions on cellular integrity and tissue organization, allowing the determination of the critical steps of the cryopreservation protocol and, thus, the use of optimized treatments...
November 12, 2017: Protoplasma
https://www.readbyqxmd.com/read/29069281/melatonin-and-its-relationship-to-plant-hormones
#17
M B Arnao, J Hernández-Ruiz
Background: Plant melatonin appears to be a multi-regulatory molecule, similar to those observed in animals, with many specific functions in plant physiology. In recent years, the number of studies on melatonin in plants has increased significantly. One of the most studied actions of melatonin in plants is its effect on biotic and abiotic stress, such as that produced by drought, extreme temperatures, salinity, chemical pollution and UV radiation, among others. Scope: This review looks at studies in which some aspects of the relationship between melatonin and the plant hormones auxin, cytokinin, gibberellins, abscisic acid, ethylene, jasmonic acid and salicylic acid are presented...
October 21, 2017: Annals of Botany
https://www.readbyqxmd.com/read/29067033/events-associated-with-early-age-related-decline-in-adventitious-rooting-competence-of-eucalyptus-globulus-labill
#18
Márcio L Aumond, Artur T de Araujo, Camila F de Oliveira Junkes, Márcia R de Almeida, Hélio N Matsuura, Fernanda de Costa, Arthur G Fett-Neto
The development of adventitious roots is affected by several factors, including the age of the cutting donor plant, which negatively affects rooting capacity. Eucalyptus globulus quickly loses rooting capacity of cuttings as the donor plant ages, although the molecular and biochemical mechanisms behind this process are still unclear. To better understand the bases of rooting competence loss in E. globulus, the time required for a significant decline in rhizogenic ability without exogenous auxin was determined in microcuttings derived from donor plants of different ages after sowing...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29044323/mini-incubators-improve-the-adventitious-rooting-performance-of-corymbia-and-eucalyptus-microcuttings-according-to-the-environment-in-which-they-are-conditioned
#19
Gilvano E Brondani, Leandro S DE Oliveira, Enéas R Konzen, André L L DA Silva, Jefferson L Costa
We addressed a major challenge in the in vitro clonal propagation of Corymbia citriodora, Eucalyptus urophylla and E. benthamii by using an ex vitro adventitious rooting strategy in a mini-incubator. Mini-incubators were placed in four environments for rooting. A shade house with no fogging system and a greenhouse with no ventilation but with a fogging environment had the best performance in terms of rooting, root growth and survival of microcuttings. Daily recording of the temperature within each mini-incubator in each environment allowed the verification of negative correlations between the maximum average temperature and the survival, adventitious rooting and root growth...
October 16, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/29036625/ospht1-8-a-phosphate-transporter-is-involved-in-auxin-and-phosphate-starvation-response-in-rice
#20
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...
November 2, 2017: Journal of Experimental Botany
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