[Objective] This study aimed to investigate rapid multiplication of Apocynum by tissue culture so as to provide plantlet sources for its industrialized cultivation. [Method] The asepsis seedlings were obtained by deal...[Objective] This study aimed to investigate rapid multiplication of Apocynum by tissue culture so as to provide plantlet sources for its industrialized cultivation. [Method] The asepsis seedlings were obtained by dealing with Apocynum seeds. Its cotyledons, hypocotyls and shoot tips were cultured on the media containing different concentrations of hormones. Finally, the influence of different hormone combinations on differentiation of cotyledons and hypocotyls, rapid multiplication of shoot tips, rapid multiplication of regenerated shoots, and rooting of test-tube plantlets was com- pared. [Result] MS＋2.0 mg/L BA＋0.03 mg/L NAA and MS＋0.07 mg/L NAA were the optimum medium for inducing regenerated buds from cotyledons and hypocotyls re- spectively; MS＋2.0 mg/L BA＋0.02 mg/L NAA was the best medium for rapid multi- plication of shoot tips; MS＋1.9 mg/L BA＋I.7 mg/L NAA was the best medium for rapid multiplication of regenerated buds： and 1/2MS＋0.6 mg/L NAA was the best medium for inducing roots. [Conclusion] The optimum hormone combination was de- termined for Apocynum rapid multiplication by tissue culture, which provides technical support on Apocynum industrialized cultivation.展开更多
This experiment was conducted in Horticulture Department, School of Plant Production, Faculty of Agriculture and Forestry, University of Duhok, Iraq in 2010 on Chrysanthemum plants, in order to mitigate the adverse in...This experiment was conducted in Horticulture Department, School of Plant Production, Faculty of Agriculture and Forestry, University of Duhok, Iraq in 2010 on Chrysanthemum plants, in order to mitigate the adverse influence of salinity by the use of liquorice root extract and study its effect on vegetative growth, chlorophyll content in leaves from chlorophyll and assistant pigment, carbohydrate and starch. Subsequently, the trail consisted of three levels of salinity （0, 4 and 8 ds m^-1） and three concentrations of the liquorice root extract 0, 2.5 and 5 g L^-1. Results showed that salinity （4 ds m^-1） rate caused significant increases in certain vegetative characteristics （branches number, plant height, leaves number and leaf area）, photosynthetic pigments （Chl a, Chl b, total chlorophyll, a-carotene, β-carotene, zeaxanthin, astaxanthin）, fresh shoot weight, fresh root weight, shoot dry weight, root dry weight, shoot： root ratio, carbohydrate dry weight percentage and starch percentage as compared to untreated check. However, increasing salinity rate to 8 ds m^-1 resulted in substantial reductions in all above mentioned Waits. Treatment with liquorices root extract, in particular, 5 g L^-1 manifested a potent capability in ameliorating the salinity negative effects in terms of vegetative and photosynthetic pigments aspects.展开更多
基金Supported by Science and Technology Development Program of Jilin Province(20110909)Youth Foud of Baicheng Normal University(200801)~~
文摘[Objective] This study aimed to investigate rapid multiplication of Apocynum by tissue culture so as to provide plantlet sources for its industrialized cultivation. [Method] The asepsis seedlings were obtained by dealing with Apocynum seeds. Its cotyledons, hypocotyls and shoot tips were cultured on the media containing different concentrations of hormones. Finally, the influence of different hormone combinations on differentiation of cotyledons and hypocotyls, rapid multiplication of shoot tips, rapid multiplication of regenerated shoots, and rooting of test-tube plantlets was com- pared. [Result] MS＋2.0 mg/L BA＋0.03 mg/L NAA and MS＋0.07 mg/L NAA were the optimum medium for inducing regenerated buds from cotyledons and hypocotyls re- spectively; MS＋2.0 mg/L BA＋0.02 mg/L NAA was the best medium for rapid multi- plication of shoot tips; MS＋1.9 mg/L BA＋I.7 mg/L NAA was the best medium for rapid multiplication of regenerated buds： and 1/2MS＋0.6 mg/L NAA was the best medium for inducing roots. [Conclusion] The optimum hormone combination was de- termined for Apocynum rapid multiplication by tissue culture, which provides technical support on Apocynum industrialized cultivation.
文摘This experiment was conducted in Horticulture Department, School of Plant Production, Faculty of Agriculture and Forestry, University of Duhok, Iraq in 2010 on Chrysanthemum plants, in order to mitigate the adverse influence of salinity by the use of liquorice root extract and study its effect on vegetative growth, chlorophyll content in leaves from chlorophyll and assistant pigment, carbohydrate and starch. Subsequently, the trail consisted of three levels of salinity （0, 4 and 8 ds m^-1） and three concentrations of the liquorice root extract 0, 2.5 and 5 g L^-1. Results showed that salinity （4 ds m^-1） rate caused significant increases in certain vegetative characteristics （branches number, plant height, leaves number and leaf area）, photosynthetic pigments （Chl a, Chl b, total chlorophyll, a-carotene, β-carotene, zeaxanthin, astaxanthin）, fresh shoot weight, fresh root weight, shoot dry weight, root dry weight, shoot： root ratio, carbohydrate dry weight percentage and starch percentage as compared to untreated check. However, increasing salinity rate to 8 ds m^-1 resulted in substantial reductions in all above mentioned Waits. Treatment with liquorices root extract, in particular, 5 g L^-1 manifested a potent capability in ameliorating the salinity negative effects in terms of vegetative and photosynthetic pigments aspects.
