Festuca rubra is a perennial grass used widely as fodder in Southwest China. It has particularly strong tolerance to heavy metal toxic. Some experiments have revealed that it can withstand very high concentrations(500...Festuca rubra is a perennial grass used widely as fodder in Southwest China. It has particularly strong tolerance to heavy metal toxic. Some experiments have revealed that it can withstand very high concentrations(500μg·g -1 ) of cadmium(Cd) and medium-high concentrations (100 μg·g -1 ) of copper (Cu). Festuca absorbs both Cd and Cu in a bi-phasic pattern. It makes Festuca very useful in the environmental and ecological engineering in removing heavy metal toxic and organic wastes. So, it would be necessary to study its physiology of salt tolerance and find the adapted range to NaCl.This is a preliminary report on salt tolerance of Festuca in sawdust culture. NaCl solution treatment concentrations were divided into 3 groups: 0 5%, 1%, 1 5%. After treatments for two weeks, we measured the amount of the chlorophyll, the soluble sugar content and the calorific values in the species. In this experiment, we used the emergy analysis method and found that the adapted range to NaCl was 0～1%, with optimum about 1%, with lethal threshold above 1 5%.展开更多
钙作为植物体内不可或缺的大量元素,影响着植物的生长并能帮助植物抵御逆境胁迫.为了探究外源钙对盐胁迫下的紫羊茅生长的作用,试验在150 m M Na Cl盐胁迫的基础上,添加10 mM CaCl_2,对紫羊茅Na^+,K^+离子含量、相对含水量、叶绿素、根...钙作为植物体内不可或缺的大量元素,影响着植物的生长并能帮助植物抵御逆境胁迫.为了探究外源钙对盐胁迫下的紫羊茅生长的作用,试验在150 m M Na Cl盐胁迫的基础上,添加10 mM CaCl_2,对紫羊茅Na^+,K^+离子含量、相对含水量、叶绿素、根冠比、根系活力含量等指标进行测定.结果表明:盐胁迫下紫羊茅生长受到抑制,但是添加10mM CaCl_2后,K+含量明显增加23.3%,相对含水量提高11%,叶绿素含量增加25.5%,根冠比明显增大,根系活力升高.说明CaCl_2对盐胁迫下紫羊茅受到的生长抑制具有一定的缓解作用.展开更多
文摘Festuca rubra is a perennial grass used widely as fodder in Southwest China. It has particularly strong tolerance to heavy metal toxic. Some experiments have revealed that it can withstand very high concentrations(500μg·g -1 ) of cadmium(Cd) and medium-high concentrations (100 μg·g -1 ) of copper (Cu). Festuca absorbs both Cd and Cu in a bi-phasic pattern. It makes Festuca very useful in the environmental and ecological engineering in removing heavy metal toxic and organic wastes. So, it would be necessary to study its physiology of salt tolerance and find the adapted range to NaCl.This is a preliminary report on salt tolerance of Festuca in sawdust culture. NaCl solution treatment concentrations were divided into 3 groups: 0 5%, 1%, 1 5%. After treatments for two weeks, we measured the amount of the chlorophyll, the soluble sugar content and the calorific values in the species. In this experiment, we used the emergy analysis method and found that the adapted range to NaCl was 0～1%, with optimum about 1%, with lethal threshold above 1 5%.
文摘钙作为植物体内不可或缺的大量元素,影响着植物的生长并能帮助植物抵御逆境胁迫.为了探究外源钙对盐胁迫下的紫羊茅生长的作用,试验在150 m M Na Cl盐胁迫的基础上,添加10 mM CaCl_2,对紫羊茅Na^+,K^+离子含量、相对含水量、叶绿素、根冠比、根系活力含量等指标进行测定.结果表明:盐胁迫下紫羊茅生长受到抑制,但是添加10mM CaCl_2后,K+含量明显增加23.3%,相对含水量提高11%,叶绿素含量增加25.5%,根冠比明显增大,根系活力升高.说明CaCl_2对盐胁迫下紫羊茅受到的生长抑制具有一定的缓解作用.
