Researches have been made on young panicle culturein vitro from wild rice of different genomes. Main results are as follows: 1. The induction frequencies of young panicle culturedin vitro from wild rice varied largely...Researches have been made on young panicle culturein vitro from wild rice of different genomes. Main results are as follows: 1. The induction frequencies of young panicle culturedin vitro from wild rice varied largely a relation to its genome. The optimal induction period of callus is the stamen and pistil differentiation stage of young panicle development. 2. Plantlets were regenerated through two ways: first, culture method, the induced calli were transferred onto differentiation medium; second, regenerate plantlets directly from young panicles of wild rice that were cultured on the differentiation medium. 3. The regeneration rate of green plantlets that obtained through cryopreservated calli inO. meyeriana was 10 times higher than that of control.展开更多
[Objective] The aim was to provide theoretical basis for the prevention and control of the invasion of Alternanthera philoxeroides（Mart.）Griseb.[Method] Effects of fragmentation intensity of fresh roots and their bu...[Objective] The aim was to provide theoretical basis for the prevention and control of the invasion of Alternanthera philoxeroides（Mart.）Griseb.[Method] Effects of fragmentation intensity of fresh roots and their burial depth on sprouting and early growth of A.philoxeroides were studied by control test.[Result] More sprouts of A.philoxeroides emerged when the fragmentation intensity of fresh roots was higher,while if the fragmentation intensity of fresh roots was lower,the early growth of A.philoxeroides was more rapid.The soil buried depth had significant effect on fresh root sprouts＇ emergence,but once fresh root sprouts could reach the soil surface and were given enough growth time,even if the fresh roots were buried in different depths,soil buried depth had no significant effect on its young plant growth.[Conclusion] If different fragmentation intensities of fresh roots present,there is a kind of trade-off strategy between root sprouts＇ emergence and plant＇ early growth,by which A.philoxeroides can invade new habitat successfully.To control the invasion of A.philoxeroides,it is critical to prevent its fresh root sprouts from emerging to soil surface,that is,to bury the fresh roots at a further soil depth.展开更多
基金the National Natural Science Foundation of China!39270436
文摘Researches have been made on young panicle culturein vitro from wild rice of different genomes. Main results are as follows: 1. The induction frequencies of young panicle culturedin vitro from wild rice varied largely a relation to its genome. The optimal induction period of callus is the stamen and pistil differentiation stage of young panicle development. 2. Plantlets were regenerated through two ways: first, culture method, the induced calli were transferred onto differentiation medium; second, regenerate plantlets directly from young panicles of wild rice that were cultured on the differentiation medium. 3. The regeneration rate of green plantlets that obtained through cryopreservated calli inO. meyeriana was 10 times higher than that of control.
基金Supported by Program from Hubei Education Department(Z200512002)Outstanding Youth Science and Technology Innovation Team Plan Project of Yangtze University~~
文摘[Objective] The aim was to provide theoretical basis for the prevention and control of the invasion of Alternanthera philoxeroides（Mart.）Griseb.[Method] Effects of fragmentation intensity of fresh roots and their burial depth on sprouting and early growth of A.philoxeroides were studied by control test.[Result] More sprouts of A.philoxeroides emerged when the fragmentation intensity of fresh roots was higher,while if the fragmentation intensity of fresh roots was lower,the early growth of A.philoxeroides was more rapid.The soil buried depth had significant effect on fresh root sprouts＇ emergence,but once fresh root sprouts could reach the soil surface and were given enough growth time,even if the fresh roots were buried in different depths,soil buried depth had no significant effect on its young plant growth.[Conclusion] If different fragmentation intensities of fresh roots present,there is a kind of trade-off strategy between root sprouts＇ emergence and plant＇ early growth,by which A.philoxeroides can invade new habitat successfully.To control the invasion of A.philoxeroides,it is critical to prevent its fresh root sprouts from emerging to soil surface,that is,to bury the fresh roots at a further soil depth.
