湖北农业科学
湖北農業科學
호북농업과학
2010年
2期
303-306
,共4页
硅(Si)%镉(Cd)胁迫%水稻幼苗%分布规律
硅(Si)%鎘(Cd)脅迫%水稻幼苗%分佈規律
규(Si)%력(Cd)협박%수도유묘%분포규률
silicon(Si)%cadmium(Cd) stress%rice (Oryza sativa L.) seedling%distribution regulation
采用溶液培养,研究不同浓度(0、30、80、130、180 mg/L)的SiO_2在4.0 mg/L CdCl_2浓度胁迫下对水稻幼苗体内镉(Cd)的分布规律.结果表明,在Cd胁迫下Si降低了水稻幼苗根、茎、叶、鞘、共质体和质外体Cd含量,其分布规律为:根＞茎叶＞茎鞘＞叶片,呈现出末端分布规律.说明Si促使大量的Cd累积在根中,根是Cd累积的主要部位,而茎、叶中Cd累积量较少.可见,Si可抑制水稻体内Cd由地下部分向地上部分运输,且能抑制地上部分Cd向叶片运输,并能减少Cd进入共质体.
採用溶液培養,研究不同濃度(0、30、80、130、180 mg/L)的SiO_2在4.0 mg/L CdCl_2濃度脅迫下對水稻幼苗體內鎘(Cd)的分佈規律.結果錶明,在Cd脅迫下Si降低瞭水稻幼苗根、莖、葉、鞘、共質體和質外體Cd含量,其分佈規律為:根＞莖葉＞莖鞘＞葉片,呈現齣末耑分佈規律.說明Si促使大量的Cd纍積在根中,根是Cd纍積的主要部位,而莖、葉中Cd纍積量較少.可見,Si可抑製水稻體內Cd由地下部分嚮地上部分運輸,且能抑製地上部分Cd嚮葉片運輸,併能減少Cd進入共質體.
채용용액배양,연구불동농도(0、30、80、130、180 mg/L)적SiO_2재4.0 mg/L CdCl_2농도협박하대수도유묘체내력(Cd)적분포규률.결과표명,재Cd협박하Si강저료수도유묘근、경、협、초、공질체화질외체Cd함량,기분포규률위:근＞경협＞경초＞협편,정현출말단분포규률.설명Si촉사대량적Cd루적재근중,근시Cd루적적주요부위,이경、협중Cd루적량교소.가견,Si가억제수도체내Cd유지하부분향지상부분운수,차능억제지상부분Cd향협편운수,병능감소Cd진입공질체.
The cadmium distribution regulation of cadmium stress by silicon in the Oryza sativa seedlings was studied by hydroponic culture method.Oryza sativa seedlings were treated with CdCl_2 at 4.0mg/L and SiO_2 at 0,30,80,130,180mg/L concentrations.The results showed that silicon reduced cadmium content in the root,stem,leaf,symplast and apoplast of the Oryza sativa seedlings under cadmium stress.The distribution of Cd was root＞stems and leaves＞stem sheath＞leaves,showing the terminal distribution.A great deal of Cd was accumulated in root.So the root was the main site of Cd accumulation,and the stems and leaves accumulated less Cd.This indicated that silicon could inhibit the transportation of cadmium from underground part to above ground part,and from above ground part to leaves of rice plant.Silicon could also reduce Cd transported into the symplast.
