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Adventitious rooting in cuttings of croton and hibiscus in response to indolbutyric acid and humic acid
Baldotto, Lílian Estrela Borges;Baldotto, Marihus Altoé;Soares, Raíssa Rezende;Martinez, Herminia Emilia Prieto;Venegas, Vitor Hugo Alvarez;
Revista Ceres , 2012, DOI: 10.1590/S0034-737X2012000400007
Abstract: adventitious rooting of ornamental plants can be accelerated by the application of growth regulators, such as auxin. humic acids, organic matter in soil and organic compounds also have a biostimulant effect. this work evaluated the rooting in cuttings of croton (codianeum variegatum l. rumph) and hibiscus (hibiscus rosa-sinensis l) in response to the application of different concentrations of indolbutyric acid (iba) and humic acid (ha). the experiment was carried out in a greenhouse. apical stem cuttings were treated with solutions at concentrations of: 0, 250, 500, 1000, 2000 mg l-1 iba and 0, 10, 20, 30, 40 mmol l-1 ha carbon isolated from vermicomposting. forty-five days after the applications, the cuttings were removed from the pots containing carbonized rice hull and the following variables were measured: rooting number, length and width of leaves, fresh and dry matter of root and aerial part and root area. the results were subjected to analysis of variance and the qualitative and quantitative effects of the treatments were compared by contrast and regression, respectively. regression equations were used to determine the maximum efficiency level of root dry matter according to iba and ha. higher accumulation of root dry matter was recorded for the treatments with the doses 579 mg l-1 iba and 14 mmol l-1 ha and 970 mg l-1 iba and 50 mmol l-1 ha for root cuttings of croton and hibiscus, respectively. it was found that the application of eiher iba or ha at the indicated doses accelerates rooting in cuttings of croton and hibiscus and contributes to the formation of vigorous plants.
Effects of Media Composition and Auxins on Adventitious Rooting of Bienertia sinuspersici Cuttings  [PDF]
Jennifer Anne Northmore, Marie Leung, Simon Dich Xung Chuong
Advances in Bioscience and Biotechnology (ABB) , 2015, DOI: 10.4236/abb.2015.610066
Abstract: An efficient in vitro method for rapid vegetative propagation of Bienertia sinuspersici, one of four terrestrial species of family Chenopodiaceae capable of performing C4 photosynthesis within a single cell, was developed. Cuttings of B. sinuspersici were used to examine the effects of Murashige and Skoog (MS) media strength and auxins on adventitious root formation. Half-strength MS medium was determined to be ideal for adventitious root formation in Bienertia cuttings. Although cuttings cultured in medium containing 5.0 mg/L α-naphthalene acetic acid (NAA) promoted the highest number of adventitious roots, cuttings cultured in medium supplemented with 1.0 mg/L indole-3-butyric acid (IBA) produced the longest adventitious roots and had the highest survival rate upon transplanting to soil. Histological analysis revealed variations in the root anatomy generated by the various auxins which may affect adventitious root formation and subsequent establishment of cuttings in soil. Overall, the established procedure provides a simple and cost-effective means for the rapid propagation of the single-cell C4 species B. sinuspersici.
Carbon monoxide-induced adventitious rooting of hypo-cotyl cuttings from mung bean seedling
Carbon monoxide-induced adventitious rooting of hypocotyl cuttings from mung bean seedling

XU Ji,XUAN Wei,HUANG Benkai,ZHOU Yehua,LING Tengfang,XU Sheng,SHEN Wenbiao,
XU
,Ji,XUAN,Wei,HUANG,Benkai,ZHOU,Yehua,LING,Tengfang,XU,Sheng,SHEN,Wenbiao

科学通报(英文版) , 2006,
Abstract: In this paper, the regulatory role of ex-ogenous carbon monoxide (CO) during the genera-tion and development of adventitious roots in mung bean (Phaseolus radiatus L. cv. Mingguang) hypo-cotyl cuttings was surveyed. The results indicated that, like nitric oxide (NO), CO donor Hematin in-duced adventitious rooting in dose- and time-de- pendent manners. These responses were also prov- en by the addition of gaseous CO aqueous solution with different concentrations. Additionally, the above CO-mediated effect was differently reversed when CO scavenger hemoglobin (Hb), CO specific syn-thetic inhibitor ZnPPIX, the auxin transport inhibitor NPA and nitric oxide synthase (NOS) inhibitor L-NAME were added with Hematin, respectively. Furthermore, after being treated with CO for 36 h, NO fluorescence was significantly enhanced and mainly distributed in the zone of vascular bundles whereas the specific NO scavenger cPTIO significantly inhib-ited NO fluorescence induced by CO, indicating that CO induces adventitious rooting of hypocotyl cuttings from mung bean seedling probably mediated by NO/NOS pathway.
Adventitious rooting of auxin-treated Lavandula dentata cuttings
Bona, Claudine Maria de;Biasi, Luiz Antonio;Lipski, Bernardo;Masetto, Magda Aparecida Maia;Deschamps, Cícero;
Ciência Rural , 2010, DOI: 10.1590/S0103-84782010005000081
Abstract: lavandula species may be propagated by seeds. however, plants will present expressive variation both in size and essential oil content. indole-3-butyric acid (iba) is a growth regulator which efficiently stimulates rooting and the objective of this research was to observe the influence of different iba concentrations on rooting of l. dentata cuttings. herbaceous cuttings with approximately 10cm in length and around 1/3 of leaf retention had their bases submerged into 0 (control), 500, 1.000, 2.000 or 3.000mg dm-3 of iba diluted in de-ionized water for 30 seconds and placed in polystyrene foam trays filled with commercial substrate and kept under intermittent mist system. averages of root number, length of the longest root, fresh and dry root weight, and percentage of rooted cuttings were evaluated after 60 days. there was no significant difference between treatments for the length of root, fresh and dry root weight. the percentage of rooted cuttings increased with iba concentrations. a quadratic regression was obtained to root number. the 2.000mg dm-3 dose increased the percentage of rooted cuttings and the mean root number per cutting. l. dentata cuttings are easy to root.
Dynamics of adventitious rooting in mini-cuttings of Eucalyptus benthamii x Eucalyptus dunnii
Brondani, Gilvano Ebling;Wendling, Ivar;Brondani, André Ebling;Araujo, Marla Alessandra;Silva, André Luís Lopes da;Gon?alves, Ant?nio Natal;
Acta Scientiarum. Agronomy , 2012, DOI: 10.4025/actasciagron.v34i2.13059
Abstract: it is possible to determine the optimum time for permanence of vegetative propagules (mini-cuttings) inside a greenhouse for rooting, and this value can be used to optimize the structure of the nursery. the aim of this study was to determine the dynamics of adventitious rooting in mini-cuttings of three clones of eucalyptus benthamii x eucalyptus dunnii. sprouts of h12, h19 and h20 clones were collected from mini-stumps that were planted in gutters containing sand and grown in a semi-hydroponic system. the basal region of the mini-cuttings was immersed in 2,000 mg l-1 indole-3-butyric acid (iba) solution for 10 seconds. the rooting percentage of the mini-cuttings, the total length of the root system and the rooting rate per mini-cutting were also evaluated at 0 (time of planting), 7, 14, 21, 28, 35, 42, 49 and 56 days. we used logistic and exponential regression to mathematically model the speed of rhizogenesis. the rooting percentage was best represented as a logistic model, and the total length of the root system was best represented as an exponential model. the clones had different speeds of adventitious rooting. the optimum time for permanence of the mini-cuttings inside the greenhouse for rooting was between 35 and 42 days, and varied depending on the genetic material.
Carbon monoxide-induced adventitious rooting of hypocotyl cuttings from mung bean seedling
Ji Xu,Wei Xuan,Benkai Huang,Yehua Zhou,Tengfang Ling,Sheng Xu,Wenbiao Shen
Chinese Science Bulletin , 2006, DOI: 10.1007/s11434-006-0668-5
Abstract: In this paper, the regulatory role of exogenous carbon monoxide (CO) during the generation and development of adventitious roots in mung bean (Phaseolus radiatus L. cv. Mingguang) hypocotyl cuttings was surveyed. The results indicated that, like nitric oxide (NO), CO donor Hematin induced adventitious rooting in dose-and time-dependent manners. These responses were also proven by the addition of gaseous CO aqueous solution with different concentrations. Additionally, the above CO-mediated effect was differently reversed when CO scavenger hemoglobin (Hb), CO specific synthetic inhibitor ZnPPIX, the auxin transport inhibitor NPA and nitric oxide synthase (NOS) inhibitor L-NAME were added with Hematin, respectively. Furthermore, after being treated with CO for 36 h, NO fluorescence was significantly enhanced and mainly distributed in the zone of vascular bundles whereas the specific NO scavenger cPTIO significantly inhibited NO fluorescence induced by CO, indicating that CO induces adventitious rooting of hypocotyl cuttings from mung bean seedling probably mediated by NO/NOS pathway.
Changes of Soluble Sugars and Enzymatic Activities During Adventitious Rooting in Cuttings of Grewia optiva as Affected by Age of Donor Plants and Auxin Treatments  [PDF]
Azamal Husen
American Journal of Plant Physiology , 2012,
Abstract: Rooting and sprouting traits of single-node leafy cuttings (SNCs) of Grewia optiva have been studied in relation to age of donor plants and auxin treatments. SNCs from 1-, 5-, 10- and 15-year- old donors and treated IBA 3000 mg L-1 gave the best responses. Periodic sampling was performed to examine Total Soluble Sugar (TTS), Indole Acetic Acid (IAA) oxidase and peroxidase (PER) activities in the rooting zone during Adventitious Root Formation (ARF). TTS decreased with passage of time from 0 to 40 days of analysis. Auxin treatments exhibit higher TSS in all donors. IAA-oxidase and PER reduced with maturation. IAA-oxidase was highest in untreated cuttings while auxin treatments had enhanced PER activity. IAA-oxidase was found to decrease up to 20 days and increased thereafter. PER increased with time from the day of planting upto its 30 days, followed by a remarkable decline at 40, irrespective of age of donor plants or auxin treatments. Both enzyme activities remained higher in SNCs of 1-year-old donors which rooted more profusely as compared other donors. Present study suggests auxin treatments have activated carbohydrate metabolism to release energy for ARF. IAA-oxidase and PER activities seems to involve for triggering, initiation and elongation of root primordia.
Root induction in radiata pine using Agrobacterium rhizogenes
Li,Mingshan; Leung,David W.M.;
Electronic Journal of Biotechnology , 2003,
Abstract: root induction using agrobacterium rhizogenes was conducted in hypocotyl explants, intact seedlings, de-rooted seedling cuttings and adventitious shoots of radiata pine (pinus radiata d. don). use of two a. rhizogenes strains (a4t and lb9402), with or without application of iba, can trigger root formation in different explants. strain lba9402 was more effective than a4t in increasing rooting percentage and root number. addition of 4.4 umiba to the medium further enhanced rooting from the cultured hypocotyl segments inoculated with the two a. rhizogenes strains. strain lba9402+iba induced in about 75% of the cultured hypocotyl segments to form roots. in contrast the controls failed to initiate roots on intact seedlings or cultured segments in presence or absence of iba. rooting of adventitious shoots from 3 year-old radiata pine was improved following inoculation with lba9402, suggesting that this rooting treatment has potential to aid clonal propagation of radiata pine.
Rejuvenation and Adventitious Rooting in Coppice-Shoot Cuttings of Tectona grandis as Affected by Stock-Plant Etiolation  [PDF]
Azamal Husen
American Journal of Plant Sciences (AJPS) , 2011, DOI: 10.4236/ajps.2011.23042
Abstract: The effect of stock-plant etiolation on adventitious rooting of single-node leafy cuttings (SNCs) made from coppice shoots from different age groups of donor plants were investigated for teak (Tectona grandis Linn. f.). When donor plants age were 1-, 2-, 3-, 4-, and 5-year-old, they were coppiced and maintained in the dark for etiolation, while a parallel set was kept in normal light in an open environment. After 20 days, coppice shoots were made into SNCs which were cultured under intermittent mist for rooting. Stock-plant etiolation significantly increased percent rooting, shoot and root length, and number of roots per SNC, but callusing at the base of SNCs decreased. Etiolated SNCs have shown 71.7% rooting, whereas for controls (non-etiolated), the response was 41.7%. The effect of aging on callusing, rooting and sprouting of etiolated and non-etiolated coppice shoots cuttings varied widely. Aging of donor plants decreased rooting and sprouting capability in SNCs and increased callusing at the base of etiolated cuttings. The results showed that stock-plant etiolation in 1-, 2-, 3-, 4-, and 5-year-old donor plants hastened rooting potential by rejuvenation of coppice shoots.
A Study of Rooting Characteristics and Anatomical Structure of Feijoa Cuttings
Meng Zhang,Hao-Ru Tang,Dan Wang,Shao-Xiong Ren,Ren-Dao Liu
Agricultural Journal , 2013,
Abstract: Softwood and 1-year-old hardwood from 4-year-old mother trees of feijoa cultivar ‘Unique’ were used to study the rooting capacity of cuttings during their development. The result showed that the rooting of softwood cuttings was better than that of hardwood cuttings. The secondary structure of stems and the development process of adventitious root were observed by means of paraffin section and microscopy on feijoa cuttings. The result of the observation showed that the adventitious root primordium of feijoa cuttings is a type of induced root primordium. This adventitious root primordium originated from the junction of the vascular cambium and pith rays. There were cyclical and sequential sclerenchyma cells in the phloem and no root primordium in the stems. The adventitious roots of cuttings generated from the edge of the cut section to 0.1-2 cm above the cut. These structural features may be one of the main reasons that our feijoa cuttings showed a low rooting rate.
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