S.H. Madani; B. Hosseini; Gh. Karimzadeh; A. Rahimi
Abstract
Iranian poppy (Papaver bracteatum Lindl.) is one of the medicinal plants belonging to the Papaveraceae family, which is widely used in pharmaceutical industries due to the presence of benzyl isoquinoline alkaloids. The polyploidy induction is one of the most interesting issues in the breeding and biotechnology ...
Read More
Iranian poppy (Papaver bracteatum Lindl.) is one of the medicinal plants belonging to the Papaveraceae family, which is widely used in pharmaceutical industries due to the presence of benzyl isoquinoline alkaloids. The polyploidy induction is one of the most interesting issues in the breeding and biotechnology of medicinal plants. In this study, colchicine treatment was carried out in five concentrations (0, 0.05, 0.1, 0.2 and 0.5) and three duration times (24, 48, 72 hours) with three replications as a factorial in a completely randomized design under greenhouse conditions, which aimed at studying morphological and phytochemical changes in polyploid plants and comparing them with diploid ones. The Microscopic, morphological and chromosomal counts were used to determine ploidy level of plants. The results showed that the concentration of 0.2% of colchicine for 48 hours was the most suitable treatment for polyploidy induction. Polyploidy caused significant changes in the increasing phytochemicals amount such as phenol, flavonoids and total antioxidants (DPPH) and decreasing the stomatal density index in comparison with the diploid plants. The chromosomes number of the diploid and tetraploid plants was obtained 14 (2n=2x=14) and 28 (2n=4x=28), respectively. Therefore, it can be concluded that the increase in ploidy level increases the phytochemical and antioxidant compounds in Iranian poppy herb.
A.R. Estaji; B. Hosseini; E. Dehghan; A. Estaji
Abstract
Salvia leriifolia Bent., belonging to Lamiaceae family, is a perennial herbaceous plant, which is endemic to Khorasan and Semnan provinces of Iran. Different pharmacological activities of this plant have been evaluated in recent years. Induction of polyploidy is an important technique for breeding of ...
Read More
Salvia leriifolia Bent., belonging to Lamiaceae family, is a perennial herbaceous plant, which is endemic to Khorasan and Semnan provinces of Iran. Different pharmacological activities of this plant have been evaluated in recent years. Induction of polyploidy is an important technique for breeding of medicinal and aromatic plants. In the present study, we studied the effects of colchicine on morphological and physiological characteristics and chemical compositions of Salvia leriifolia. Polyploidy induction was carried out in the four-leaf stage. Apical meristem was treated by colchicine at concentrations of 0, 0.05, 0.1, 0.2, and 0.5%, and three different time levels of 24, 48 and 72 hours. Morphological, microscopic (light and electron), flow cytometric analysis and chromos counting were used for ploidy induction analysis and selection of induced tetraploids. Identification of essential oil compounds was carried out by gas chromatograph and gas chromatography mass spectrometry methods. According to the results, colchicines at a concentration of 0.05% for 48 hours at four-true-leave stage was the best treatment for induction of autotetraploidy (23.3%) in Salvia leriifolia. Tetraploid induction in Salvia leriifolia caused significant changes in morphological, cytological, physiological and physiochemical characteristics such as increased dry and fresh weight, chlorophyll content, photosynthesis, and decreased plant height. In addition, an increase in ploidy level caused significant changes in essential oil composition.
S. Zishan; R. Asghari Zakaria; N. Zare
Abstract
Nigella Sativa L. is an annual plant from Ranunculacea family. Its seeds contain protein, alkaloids, kinons, saponin, and volatile essential oil used as antibacterial agent and treatment of some diseases. This study was aimed to investigate the polyploidy induction in Nigella sativa via seed treatment ...
Read More
Nigella Sativa L. is an annual plant from Ranunculacea family. Its seeds contain protein, alkaloids, kinons, saponin, and volatile essential oil used as antibacterial agent and treatment of some diseases. This study was aimed to investigate the polyploidy induction in Nigella sativa via seed treatment at colchicine concentrations of 0, 0.025%, 0.05%, 0.1%, and 0.2% for 8, 24 and 48 hours. The study was conducted in a factorial experiment based on completely randomized design with three replications. The percentage of tetraploid plants was determined through the morphological and chromosomal studies. Results of analysis of variance showed that effects of colchicine level, treatment duration, and the interaction between them were significant on the survival of plants and percentage of tetraploidy induction. The seed germination and viability of plants significantly decreased with increasing of colchicine concentration and treatment duration. The lowest number of survived plants was observed at a concentration of 2.0% colchicine and a treatment time of 24 and 48 hours. The highest percentage of induced tetraploid plants (9.9%) was obtained at a concentration of 0.05% colchicine with a treatment time of 48 hours, showing no significant difference with concentrations of 1 and 2 % at the same treatment time. The plants treated with colchicine showed higher plant height, internodes length, capsule width and length compared to that of control plants. Furthermore, they had larger stomata with lower number as compared with diploid plants.
E. Afshari; G.A Ranjbar; S.K. Kazemitabar; M. Riasat; H. Kazemi Poshtmasari
Abstract
Doubling the number of chromosomes in a medicinal plant leads to variation in allelic composition and diversity of active enzymes in secondary metabolites biosynthesis route and can facilitate the process of secondary metabolism and increase secondary metabolite. This experiment was conducted in order ...
Read More
Doubling the number of chromosomes in a medicinal plant leads to variation in allelic composition and diversity of active enzymes in secondary metabolites biosynthesis route and can facilitate the process of secondary metabolism and increase secondary metabolite. This experiment was conducted in order to study the effect of colchicine and trifluralin on ploidy induction and cytogenetic characteristics of cells in the root meristem of fenugreek. Root tips were used for karyotypic studies. Seedlings were treated by colchicine solution at 0.25, 0.5 and 1 gl-1 concentrations and trifluralin solution 48% at 7.5, 15 and 22.5 μM concentrations for 12 and 24 h. The Video Analysis System was used for karyotype analysis. The basic chromosome number was X=8. Results showed that concentration of trifluralin and colchicine, treatments duration and interaction between them on the ploidy induction were statistically significant. The maximum ploidy induction was happened by seedling immersion in 22.5 μM trifluralin for 24 h and in 0.5 gl-1 colchicine for 12 h. Treatments affected the length of chromosomes and karyotypic formula. Result of analysis of variance based on completely randomized design (CRD) showed significant differences among the karyotype of control and treated samples for all karyotypic traits (p <0.01). Induced polyploidy affected by trifluralin was more than that of colchicines, although the concentrations of trifluralin were approximately 100 times lower than concentrations of colchicine. This indicates a greater ability of trifluralin in ploidy induction in this plant.
M. Alirezaie Noghondar; H. Arouiee; Sh. Rezazadeh; M. Shoor; R. Taghizad Farid
Abstract
The genus of Colchicum is known for the production of colchicine which some species such as C. kotschyi Boiss. and C. robustum Stefanov are grown in Iran. The level of colchicine varies in different species as well as stages of plant development stages. In the present study, colchicine content and dry ...
Read More
The genus of Colchicum is known for the production of colchicine which some species such as C. kotschyi Boiss. and C. robustum Stefanov are grown in Iran. The level of colchicine varies in different species as well as stages of plant development stages. In the present study, colchicine content and dry matter of corm and seeds in C. kotschyi and C. robustum, growing wild in Iran, were determined during different phenological stages. The plant materials were collected in different seasons (spring, summer, autumn and winter), during 2009-2010 and the amounts of colchicine were determined by high liquid performance chromatography method. The highest amount of colchicine of corm in both species was observed during autumn, in the time close to the beginning of activation of the root, with amount of 0.077 and 0.049% (wt/wt) in C. kotschyi and C. robustum, respectively. The lowest amount of colchicine of corm in C. kotschyi was found to be 0.0058% (wt/wt) during summer, before flowering stage, while the lowest amount of Colchicine in C. robustum was found to be 0.0075% (wt/wt) during winter, synchronous to flowering and vegetative growth. Colchicine content in seeds was found to be 0.128 and 0.0462% (wt/wt) in C. robustum and C. kotschyi, respectively. The highest and the lowest of corm dry matter in both species were found in summer and winter, respectively.
S.F. Borgheei; H. Sarikhani; M. Chaichi; A. Kashi
Abstract
In vitro induction of polyploidy using mutation agents is one of the medicinal plant breeding methods which has been employed to increase potential of secondary metabolites production. In this research, in order to induce polyploidy in lemon balm (Melissa officinalis L.), in vitro regenerated explants ...
Read More
In vitro induction of polyploidy using mutation agents is one of the medicinal plant breeding methods which has been employed to increase potential of secondary metabolites production. In this research, in order to induce polyploidy in lemon balm (Melissa officinalis L.), in vitro regenerated explants were treated by colchicine at 4 different concentrations 0.00, 0.05, 0.1 and 0.2% for 24 and 48 h. Level of ploidy were identified in survival explants through root tip chromosome counting and leaf sample flow cytometry. Ten days after treatments, all colchicine-free treated explants were survived. Among the colchicine treatments (0.05, 0.1 and 0.2%), the highest explants survival rate were observed in the 0.05% colchicine application for 24 h (63.8%). On the contrary, 0.2% colchicine treatment for 48 h showed the highest rate of explants lethality. Results of chromosome counting and flow cytometry analysis indicated both diploid and mixoploid plants in colchicines treated explants. More effective treatment of colchicine for induction of ploidy was observed in 0.05% colchicine treatment for 48 h as high as 33.3% mixoploid plants.
