CAJ | 학술논문

采用盆栽试验研究了镉胁迫下,籼稻(CG132R)和粳稻(粳925)在不同生育期对重金属镉的吸收和积累及其镉的分布和转移规律.结果表明,镉由水稻根部向地上部转移能力表现为分蘖期＞成熟期.镉胁迫下,CG132R 和粳925各器官镉含量都随外源镉含量升高而上升,低镉条件下水稻各器官更容易富集镉.镉在 CG132R 和粳925植株内分配表现为根＞茎＞叶＞糙米＞谷壳,根是水稻吸收和积累镉的主要器官.CG132R 糙米镉含量与积累量都高于粳925,其中 CG132R 籽粒镉积累量为粳925的5倍左右.在对镉的吸收、积累、转移和分配方面,CG132R 与粳925存在显著差异.CG132R 吸收和积累镉的量较粳925多,且镉转移能力也强于粳925.CG132R 糙米镉含量高于粳925是由于 CG132R 对土壤中镉吸收能力更强,且镉向糙米转移能力也更强.
채용분재시험연구료력협박하,선도(CG132R)화갱도(갱925)재불동생육기대중금속력적흡수화적루급기력적분포화전이규률.결과표명,력유수도근부향지상부전이능력표현위분얼기＞성숙기.력협박하,CG132R 화갱925각기관력함량도수외원력함량승고이상승,저력조건하수도각기관경용역부집력.력재 CG132R 화갱925식주내분배표현위근＞경＞협＞조미＞곡각,근시수도흡수화적루력적주요기관.CG132R 조미력함량여적루량도고우갱925,기중 CG132R 자립력적루량위갱925적5배좌우.재대력적흡수、적루、전이화분배방면,CG132R 여갱925존재현저차이.CG132R 흡수화적루력적량교갱925다,차력전이능력야강우갱925.CG132R 조미력함량고우갱925시유우 CG132R 대토양중력흡수능력경강,차력향조미전이능력야경강.
A pot experiment was conducted to study the absorption,accumulation,distribution and transfer of cadmium (Cd)during various growth stages of indica (CG1 32R)and japonica rice(Jing 925 )under Cd stress.Results showed that the transfer ability of Cd from root to aboveground parts during the tillering stage was stronger than that during the maturity stage.With the increasing concentration of exogenous Cd,the Cd content in different organs of CG1 32R and Jing 925 increased.Under low soil Cd content,rice plant organs enriched Cd more easily.The proportion of Cd distribution in CG1 32R and Jing 925 was as follows:root > stem > leaf > brown rice > rice husk.The root was the primary organs of the rice in Cd absorption and accumulation.The Cd content and accumulation in brown rice was 500% as higher in CG1 32R than that in Jing 925 .Further investigation showed that there was a significant difference between CG1 32R and Jing 925 in Cd absorption,accumulation,transfer and distribution.CG1 32R had stronger capabilities of absorption,accumulation and transfer of Cd than Jing 925 .Higher concentration of Cd in brown rice of CG1 32R contributed to more stronger capability in absorption and transfer of Cd than that of Jing 925 .