Biotechnology
Fereshteh Heidargholinezhad; Y. Hamidoghli; V. Ghasemiomran; P. Biparva
Abstract
Centella asiatica (L.) Urban, a medicinal plant from Apiaceae family, is known as an endangered species in Iran. This plant has many therapeutic properties, including memory enhancement, anticancer, and treating skin diseases and has also high antioxidant activities. Plant cell and tissue ...
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Centella asiatica (L.) Urban, a medicinal plant from Apiaceae family, is known as an endangered species in Iran. This plant has many therapeutic properties, including memory enhancement, anticancer, and treating skin diseases and has also high antioxidant activities. Plant cell and tissue culture is an important tool in basic studies and has commercial applications. Tissue culture method can be used to breed medicinal plants or change the amount of secondary metabolites. Due to the high value of C. asiatica, in vitro cultivation can be used to produce more of this plant. Optimizing tissue culture is useful for conducting the applied researches and metabolic engineering of different secondary metabolites biosynthetic pathways. The present study was aimed at achieving a suitable protocol for in vitro propagation and determining the appropriate concentrations of growth regulators for micropropagation of this valuable species. The interaction of BAP (0, 1, 2, and 3 mg.l-1) and IBA (0, 0.5, and 1 mg.l-1) was investigated on proliferation of nodal explants in MS medium. Then, rooting of the propagated explants was evaluated using IBA and NAA. The results showed that MS with 2 mg.l-1 BAP and 1 mg.l-1 IBA and MS with 1 mg.l-1 IBA were the best media for proliferation and rooting, respectively.
Biotechnology
Y. Ghasemi; F. Heidargholinezhad; S. Kelij; M. Imani Rastabi
Abstract
The thornless Black berry (Rubus occidentalis) contains components such as elagic acid, anthocyanin, campherol and salicylic acid. So, it has high antioxidant activity that can inactivate the free radicals and prevent many diseases, such as cancer. Optimization of tissue culture methods for mass production ...
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The thornless Black berry (Rubus occidentalis) contains components such as elagic acid, anthocyanin, campherol and salicylic acid. So, it has high antioxidant activity that can inactivate the free radicals and prevent many diseases, such as cancer. Optimization of tissue culture methods for mass production and gene transfer is very important for blackberry. The present study was aimed at determining the effects of different plant growth regulators concentrations on regeneration and rooting and the effects of different concentrations of sucrose on rooting of thornless black berry (Rubus occidentalis L.) under in vitro conditions. Interaction of BA (0.2, 0.5, 1, 1.5, and 2 mg.L-1) and IBA (0 and 0.1 mg.L-1) was investigated on lateral bud explants regeneration. In the rooting stage, the effects of IBA and NAA each at four levels of 0.2, 0.5, 0.75, and 1 mg.L-1 as well as sucrose at four levels of 1, 1.5, 3, and 4.5% were studied. BA (1 and 1.5 mg.L-1) + IBA (0.1 mg.L-1) was the best regeneration treatment (regeneration: 100%, number of shoots: 4.6, and shoot length: 1.30 cm). The results indicated that the best rooting medium contained NAA (0.75 mg.L-1) and sucrose 3 and 4.5% (rooting: 100%, number of roots: 7.5, and root length: 2.88 cm).
M.A. Shahraki; A. Emamjomeh; M. Valizadeh; L. Fahmideh
Abstract
Cynara scolymus L. is an economically valuable medicinal plant, but salinity can limit the regions under cultivation of this crop. Therefore, identifying the appropriate tissue culture method for this plant can be useful for selecting salinity tolerant cultivars. This research was carried out with the ...
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Cynara scolymus L. is an economically valuable medicinal plant, but salinity can limit the regions under cultivation of this crop. Therefore, identifying the appropriate tissue culture method for this plant can be useful for selecting salinity tolerant cultivars. This research was carried out with the aim of identifying the appropriate explant and method for tissue culture of this plant as the first step to produce tolerant cultivars in future projects. In this study, firstly, sterile seedlings of plant seeds were prepared. Then, the terminal meristem was selected as a suitable explant during a pre-test and evaluated in vitro to study salinity tolerance with five different concentrations of sodium chloride (0, 20, 40, 60, and 80 mM) in a completely randomized design with three replications. This research was performed in the medicinal plants research center of Sistan and Baluchistan University in 2017. Salinity reduced some morphological traits (stem length, root length, shoot and root fresh and dry weight) of seedlings grown from terminal meristem explant. As the concentration of sodium chloride increased to 60 and 80 mM, the amount of soluble sugars and proline increased. The lowest amount of soluble sugars (33 mg g-1 dry weight) and proline (50 µM) was related to zero and 20 mM sodium chloride concentrations, respectively. The results indicate that this plant is sensitive to different levels of salinity, although it is somewhat tolerant to low and moderate levels of salinity.
M. Salmalian; A. Ghasemnejad; K. Mashayekhi
Abstract
Using stimulants is an efficient way to increase the production of secondary metabolites of medicinal plants under in vivo and in vitro conditions. The present study aimed to investigate the effect of NaCl (0 and 50 mM), salicylic acid, and methyl jasmonate (each in 0 and 100 μM) in solid and liquid ...
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Using stimulants is an efficient way to increase the production of secondary metabolites of medicinal plants under in vivo and in vitro conditions. The present study aimed to investigate the effect of NaCl (0 and 50 mM), salicylic acid, and methyl jasmonate (each in 0 and 100 μM) in solid and liquid culture media on the biochemical properties and phenylalanine ammonia-lyase (PAL) activity of stevia callus under in vitro conditions. This study was conducted in a completely randomized design with a two-factor factorial arrangement in four replications. The stimuli used, culture medium and their interactions had a significant effect on the measured traits. The highest amount of phenol and flavonoid production was observed in salicylic acid 100 + salinity 50 and salinity 50 treatments in solid culture medium. Treatments including salinity 50, salicylic acid 100 + salinity 50 and methyl jasmonate 100 + salinity 50 in the solid medium increased PAL enzyme activity compared to other treatments. PAL enzyme, phenol and flavonoid were positively correlated each other. The 50 mM salinity treatment also increased proline amino acid content. Therefore, in order to improve the production of secondary compounds such as phenol, flavonoids and also PAL enzyme activity in stevia, a combination of salicylic acid (100 μM) and salinity (50 mM) is recommended under solid culture medium conditions.
Y. Shakoori; B. Kashefi
Abstract
Considering the importance of medicinal properties of tarragon, and its propagation problems, tissue culture techniques can be used for its propagation. The aim of this study was to compare different culture media and chemical plant growth regulators on the growth traits and secondary metabolites of ...
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Considering the importance of medicinal properties of tarragon, and its propagation problems, tissue culture techniques can be used for its propagation. The aim of this study was to compare different culture media and chemical plant growth regulators on the growth traits and secondary metabolites of tarragon (Artemisia dracunculus L.). Treatments were culture medium at three levels of Murashige and Skoog (MS), Gamborg (B5) and Schenk & Hildebrandt (SH), and growth regulators at five levels of Kinetin (KIN), NAA, and 2,4-D alone (each with a concentration of 0.5 mg l-1), and two combinations of NAA+KIN and 2,4-D+KIN. The present study was conducted as a factorial based on completely randomized design with four replications. The results showed that culture media and growth regulators treatments had significant effects on callus characteristics, regenerated plantlets, callus secondary metabolites, and plant essential oil and its composition. MS medium caused a higher callus induction percentage and more increase in its fresh and dry weight. MS with NAA+KIN and 2,4-D+KIN caused the highest regeneration percentage (35.5), root length (1.28 cm), root (6.5 g) and stem (2.6 g) dry weight, the amount of callus phenolics, and also the amount of essential oil (2.42%) and ocimene (5.78%). Estragol percentage of essential oil increased by 2,4-D, while NAA enhanced ocimene, limonene, and linalool. The percentage of limonene in treatment with NAA alone and linalool in treatment with 2,4-D+ KIN was higher than those of other treatments. The results showed that the highest growth index, callus secondary metabolites, and plant essential oil were observed in MS medium containing growth regulators. Also, the application of kinetin with NAA and 2, 4-D resulted in improved callus growth, regeneration, essential oil, and some of its compounds production in tarragon.
M. Ebrahimi; A. Mokhtari; R. Amirian
Abstract
Stevia (Stevia rebaudiana Bertoni) is a cross-pollinated plant whose seed vigor is poor. Therefore, the vegetative propagation approaches like in vitro culture techniques could be the best choice for mass and true-to-type production of stevia plantlets. This study was aimed to evaluate the effects of ...
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Stevia (Stevia rebaudiana Bertoni) is a cross-pollinated plant whose seed vigor is poor. Therefore, the vegetative propagation approaches like in vitro culture techniques could be the best choice for mass and true-to-type production of stevia plantlets. This study was aimed to evaluate the effects of basal media (MS, B5 and LS) and physical parameters such as light (55 and 110 μmol m-2 s-1) and temperature (22, 25 and 27ºC) on in vitro culture of stevia. The nodal segments were cultured on basal media containing various combination of BAP and IAA or IBA. The ANOVA showed significant differences (P≤0.05) among treatments on micropropagation of stevia. In another experiment, the effect of mT (0.5, 1, 1.5 and 2 mg/l) was also compared with the best treatment from the first experiment. It was found that mT at 1 mg/l was the best concentration. The genetic stability of micropropagated plantlets relative to the mother plant was achieved by AFLP marker using 12 selected primers. In this study, 231 reproducible bands around 50-500bp were scored, indicating similarity of in vitro plantlets with the donor.
M. Pirooz; H. Amiri; B. Dostii
Abstract
Thymus daenensis Celak., belonging to the Lamiaceae family, is an endemic species of genus Thymus in Iran. Despite the increasing need for mass propagation of this plant due to the presence of useful secondary metabolites, there is little information about its proliferation. In the present study, the ...
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Thymus daenensis Celak., belonging to the Lamiaceae family, is an endemic species of genus Thymus in Iran. Despite the increasing need for mass propagation of this plant due to the presence of useful secondary metabolites, there is little information about its proliferation. In the present study, the interaction of some hormonal treatments in the MS medium containing indole acetic acid (IAA), benzyl amino purine (BAP) and kinetin (Kin) in presence or absence ascorbic acid (AS) were investigated for callus induction and micropropagation of Thymus daenensis. Results showed that the callus index, fresh weight, and dry weight of callus from internode explants were better as compared with apical meristem explants. Significant differences were found for regeneration from callus cultures derived from apical meristem and internode, so that NAA-Kin (4.5 and 1.5 mg/L) and NAA-BAP (9 and 6 mg/L) were the best hormonal combination. As well, significant differences were found between callus production from internode explants and apical meristem explants, so that Kin-NAA (9 and 3 mg/L), and NAA-BAP (6 and 9 mg/L) in presence of ascorbic acid were the best hormonal combination. Overall, the control treatment, NAA and Kin showed favorable effects on callus induction and better regeneration was obtained from internode explants.
E. Afshari; Gh. Ranjbar; S.K. Kazemitabar; M. Riasat; H. Kazemi Poshtmasari
Abstract
In order to study callus induction, somatic embryogenesis and plant regeneration in fenugreek (Trigonella foenum-graecum L.) an experiment was conducted in Sari Agricultural Sciences and Natural Resources University during 2008. In the current experiment, different explants including stem segments, embryos, ...
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In order to study callus induction, somatic embryogenesis and plant regeneration in fenugreek (Trigonella foenum-graecum L.) an experiment was conducted in Sari Agricultural Sciences and Natural Resources University during 2008. In the current experiment, different explants including stem segments, embryos, hypocotyls, etc. were cultured on two basal culture media viz. B5 and MS. Moreover, 2, 4-D, Kin, NAA, BAP and IBA were used as plant growth regulators. Result showed that the medium containing 2mgl-1 2, 4-D in combination with 0.5mgl-1Kinetin was the best treatment for callus induction in both MS and B5 media. Combination of 0.5mgl-1 NAA and 2.5mgl-1 BAP was the best treatment for somatic embryogenesis in both basal media. Also, combination of 1.5mgl-1 BAP and 0.5mgl-1 NAA was the best hormonal treatment to shoot regeneration in both basal media. According to the results, the treatment containing 1 mgl-1 IBA was optimum for root induction from regenerated shoots on MS medium.
M.B. Rezaiee; F. Bernar; S.A. Shafiee Darabi
Volume 17, Issue 1 , February 2003, , Pages 1-73
Abstract
The botanical, ecologycal, chemical and medicine data of galbanum were collected and review from previous research to modification and establish new subjects of this novel medicine plant. To establish the first step of biotechnology, the tissue culture of galbanum were achieve from radicle of seedling ...
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The botanical, ecologycal, chemical and medicine data of galbanum were collected and review from previous research to modification and establish new subjects of this novel medicine plant. To establish the first step of biotechnology, the tissue culture of galbanum were achieve from radicle of seedling of galbanum on MS. medium with and casein hydrolysis in auxin and cytokinin hormone treatment. The root was induced from new callus on the same medium at C and the root culture was achieved with radicle of seedling in the same manner.
