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 ...
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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 ...
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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.
