The internodes of the new cultivar Long-ma No.1 of Cannabis sativa L.（Industrial hemp） were used as explants for tissue culture. The paper studied the key factors of industrial hemp tissue culture, such as the physi...The internodes of the new cultivar Long-ma No.1 of Cannabis sativa L.（Industrial hemp） were used as explants for tissue culture. The paper studied the key factors of industrial hemp tissue culture, such as the physiological state of aseptic seedlings, the selection and concentration of plant growth regulators and so on.Hemp seed disinfection used 75% alcohol for 2 min and sterilized in 1‰ Hg Cl2 for 5min. The best combinations of plant growth regulators were 1.0 mg/L 6-BA and 0.5mg/L NAA for the induction of callus, and the best combinations of hormones were1.0 mg/L KT and 0.5 mg/L NAA for differentiation rate of adventitious bud.展开更多
Historically, industrial hemp (Cannabis sativa L.) has been a valuable source of metabolites and compounds, such as cannabidiols. There is a need for large amounts of plant tissue to be grown under controlled environm...Historically, industrial hemp (Cannabis sativa L.) has been a valuable source of metabolites and compounds, such as cannabidiols. There is a need for large amounts of plant tissue to be grown under controlled environments, and plant tissue culture is one unique way to yield this tissue. The purposes of this study were to determine: 1) the optimal concentrations (μM)/ratios of auxin:cytokinin in media and;2) the optimal mineral salts formulation for callus induction and callus growth in select hemp cultivars. To find the optimal concentration/ratios, 16 different combinations of auxin:cytokinin and three different mineral salts formulations were evaluated. The three mineral salts formulations tested were MS salts, MB5D1K and an MTSU formulation. The top performing hormone formulations were determined to be equal concentrations (1:1, 2:2, 3:3 μM) of auxin and cytokinin. The top performing media hormone formulations for callus induction were determined to be 2:1, 2:2, 2:3, and 3:2 μM (auxin:cytokinin). The optimal mineral salts formulation was determined to be MD5D1K. Therefore, the overall optimal media formulation for hemp callus production would be MB5D1K salts with the concentration/ratio of 2:2 μM (auxin:cytokinin).展开更多
Many modifications to growing environments and specific stress induction techniques exist which are supported by preliminary research to increase yield and/or concentration of secondary metabolites in <em>Cannab...Many modifications to growing environments and specific stress induction techniques exist which are supported by preliminary research to increase yield and/or concentration of secondary metabolites in <em>Cannabis sativa</em> L. One such technique is the modification of the spectral composition of light late in flowering-stage development. In this study, we evaluated the hypothesis that the addition of narrow bandwidth UV-A light and the combination of narrow bandwidth blue and red light, during the final two weeks of the flowering cycle affect the concentration of cannabinoids and terpenes, with no difference in harvest dry weight. Three treatments were used in this experimental design, 1) control-full spectrum illumination, 2) UV-A (~390 nm) at ~66 PPFD in addition to control lighting, and 3) blue (~450 nm) and red (~660 nm) at ~158 PPFD in addition to control lighting. Light treatments were initiated during the final two weeks of flowering to assess secondary metabolite concentration (cannabinoids and terpenes) and yield of three cannabis cultivars (Type I (Larry OG), Type II (Pootie Tang), and Type III (Super White)). With two of the three cultivars used in this study responding with enhanced production of THC our results support the potential beneficial effects of attributed light-mediated treatments on cannabinoid production. On the other hand, our results show contrasting trends for terpene production and yield of dry weight flower.展开更多
Cannabidiol (CBD), a major constituent of Cannabis, has been shown to be a powerful anti-inflammatory and anti-anxiety drug, without exerting a psychotropic effect. However, when given either intraperitoneally or oral...Cannabidiol (CBD), a major constituent of Cannabis, has been shown to be a powerful anti-inflammatory and anti-anxiety drug, without exerting a psychotropic effect. However, when given either intraperitoneally or orally as a purified product, a bell-shaped dose-response was observed, which limits its clinical use. In the present study, we have studied in mice the anti-inflammatory and anti-nociceptive activities of standardized plant extracts derived from the Cannabis sativa L., clone 202, which is highly enriched in CBD and hardly contains any psychoactive ingredients. In stark contrast to purified CBD, the clone 202 extract, when given either intraperitoneally or orally, provided a clear correlation between the anti-inflammatory and anti-nociceptive responses and the dose, with increasing responses upon increasing doses, which makes this plant medicine ideal for clinical uses. The clone 202 extract reduced zymosan-induced paw swelling and pain in mice, and prevented TNFα production in vivo. It is likely that other components in the extract synergize with CBD to achieve the desired anti-inflammatory action that may contribute to overcoming the bell-shaped dose-response of purified CBD. We therefore propose that Cannabis clone 202 (Avidekel) extract is superior over CBD for the treatment of inflammatory conditions.展开更多
扩增片段长度多态性(Amplified Fragment Length Polymorphism,AFLP)技术是建立在RFLP标记和PCR技术的基础上,利用限制性内切酶片段的不同长度检测DNA多态性的一种DNA指纹分析技术。本文对AFLP技术在大麻遗传研究中的应用做了较为全面,...扩增片段长度多态性(Amplified Fragment Length Polymorphism,AFLP)技术是建立在RFLP标记和PCR技术的基础上,利用限制性内切酶片段的不同长度检测DNA多态性的一种DNA指纹分析技术。本文对AFLP技术在大麻遗传研究中的应用做了较为全面,系统的阐述。展开更多
基金Supported by Heilongjiang Academy of Sciences Youth Innovation Fund~~
文摘The internodes of the new cultivar Long-ma No.1 of Cannabis sativa L.（Industrial hemp） were used as explants for tissue culture. The paper studied the key factors of industrial hemp tissue culture, such as the physiological state of aseptic seedlings, the selection and concentration of plant growth regulators and so on.Hemp seed disinfection used 75% alcohol for 2 min and sterilized in 1‰ Hg Cl2 for 5min. The best combinations of plant growth regulators were 1.0 mg/L 6-BA and 0.5mg/L NAA for the induction of callus, and the best combinations of hormones were1.0 mg/L KT and 0.5 mg/L NAA for differentiation rate of adventitious bud.
文摘Historically, industrial hemp (Cannabis sativa L.) has been a valuable source of metabolites and compounds, such as cannabidiols. There is a need for large amounts of plant tissue to be grown under controlled environments, and plant tissue culture is one unique way to yield this tissue. The purposes of this study were to determine: 1) the optimal concentrations (μM)/ratios of auxin:cytokinin in media and;2) the optimal mineral salts formulation for callus induction and callus growth in select hemp cultivars. To find the optimal concentration/ratios, 16 different combinations of auxin:cytokinin and three different mineral salts formulations were evaluated. The three mineral salts formulations tested were MS salts, MB5D1K and an MTSU formulation. The top performing hormone formulations were determined to be equal concentrations (1:1, 2:2, 3:3 μM) of auxin and cytokinin. The top performing media hormone formulations for callus induction were determined to be 2:1, 2:2, 2:3, and 3:2 μM (auxin:cytokinin). The optimal mineral salts formulation was determined to be MD5D1K. Therefore, the overall optimal media formulation for hemp callus production would be MB5D1K salts with the concentration/ratio of 2:2 μM (auxin:cytokinin).
文摘Many modifications to growing environments and specific stress induction techniques exist which are supported by preliminary research to increase yield and/or concentration of secondary metabolites in <em>Cannabis sativa</em> L. One such technique is the modification of the spectral composition of light late in flowering-stage development. In this study, we evaluated the hypothesis that the addition of narrow bandwidth UV-A light and the combination of narrow bandwidth blue and red light, during the final two weeks of the flowering cycle affect the concentration of cannabinoids and terpenes, with no difference in harvest dry weight. Three treatments were used in this experimental design, 1) control-full spectrum illumination, 2) UV-A (~390 nm) at ~66 PPFD in addition to control lighting, and 3) blue (~450 nm) and red (~660 nm) at ~158 PPFD in addition to control lighting. Light treatments were initiated during the final two weeks of flowering to assess secondary metabolite concentration (cannabinoids and terpenes) and yield of three cannabis cultivars (Type I (Larry OG), Type II (Pootie Tang), and Type III (Super White)). With two of the three cultivars used in this study responding with enhanced production of THC our results support the potential beneficial effects of attributed light-mediated treatments on cannabinoid production. On the other hand, our results show contrasting trends for terpene production and yield of dry weight flower.
文摘Cannabidiol (CBD), a major constituent of Cannabis, has been shown to be a powerful anti-inflammatory and anti-anxiety drug, without exerting a psychotropic effect. However, when given either intraperitoneally or orally as a purified product, a bell-shaped dose-response was observed, which limits its clinical use. In the present study, we have studied in mice the anti-inflammatory and anti-nociceptive activities of standardized plant extracts derived from the Cannabis sativa L., clone 202, which is highly enriched in CBD and hardly contains any psychoactive ingredients. In stark contrast to purified CBD, the clone 202 extract, when given either intraperitoneally or orally, provided a clear correlation between the anti-inflammatory and anti-nociceptive responses and the dose, with increasing responses upon increasing doses, which makes this plant medicine ideal for clinical uses. The clone 202 extract reduced zymosan-induced paw swelling and pain in mice, and prevented TNFα production in vivo. It is likely that other components in the extract synergize with CBD to achieve the desired anti-inflammatory action that may contribute to overcoming the bell-shaped dose-response of purified CBD. We therefore propose that Cannabis clone 202 (Avidekel) extract is superior over CBD for the treatment of inflammatory conditions.
