钙离子对不同水稻品种苗期镉吸收转运的影响  

Effect of Ca^(2+) on Cadcium Uptake and Transport of Different Rice Varieties at Seedling Stage

作　　者：滕浪 付天岭 郑锋 普天赟 高珍冉 秦松[4] 罗德强[5] 何腾兵[2,3] TENG Lang;FU Tianling;ZHENG Feng;PU Tianyun;GAO Zhenran;QIN Song;LUO Deqiang;HE Tengbing(Agriculture and Rural Affairs Bureau Tongren,Tongren Guizhou 554300,China;College of Agricultural Guizhou University,Guiyang 550025,China;The New Rural Development Institute at Guizhou University,Guiyang 550025,China;Guizhou Institute of Soil and Fertilizer,Guiyang 550025,China;Rice Research Institute,Guizhou Academy of Agricultural Sciences College of Agriculture,Guiyang 550025,China)

机构地区：[1]铜仁市农业农村局,贵州铜仁554300 [2]贵州大学农学院,贵阳550025 [3]贵州大学新农村发展研究院,贵阳550025 [4]贵州省农业科学院土壤肥料研究所,贵阳550025 [5]贵州省农业科学院水稻研究所,贵阳550025

出　　处：《种子》2022年第4期60-69,共10页Seed

基　　金：贵州省科技厅科研机构服务企业行动计划项目“养殖污染控制与废弃物无害化资源化利用技术推广”(黔科合服企[2018]4007(006));贵州省科技厅基础条件平台建设项目“贵州省山地畜禽养殖污染控制与资源化检测基础条件平台”(黔科合平台人才[2019]5701号)。

摘　　要：为研究Ca^(2+)对Cd胁迫条件下水稻苗期Cd积累的影响,以及不同水稻品种对Cd吸收能力的差异性,本研究通过营养液培养的方法,在2种Cd胁迫浓度(1、2 mg/L)下添加4种Ca^(2+)浓度(0、0.5、1、2 g/L),研究Ca^(2+)对水稻品种红优2号、黑糯72与杂交品种C两优华占、宜香优2115苗期Cd吸收及转运的影响。结果表明,各水稻品种对Cd的吸收能力强弱关系为:宜香优2115>C两优华占>红优2号>黑糯72,添加Ca^(2+)能够显著降低水稻根系、叶鞘及叶片中Cd含量,且在Cd浓度为2 mg/L添加2 g/L Ca^(2+)处理下红优2号、黑糯72、C两优华占、宜香优2115根系分别显著降低58.39%、71.38%、51.71%、80.21%;叶鞘分别显著降低39.03%、60.54%、67.77%、73.59%;叶片分别显著降低46.39%、56.77%、71.73%、59.35%。添加Ca^(2+)能够降低C两优华占中Cd由根系向叶鞘与叶片中转移,增加宜香优2115中Cd由根系向叶鞘与叶片转移,红优2号与黑糯72处理间转移系数无明显差异。可见,Ca^(2+)能降低水稻苗期对Cd的吸收,可为进一步探讨喀斯特地区土壤中Ca^(2+)对Cd污染稻田土壤安全利用提供科学依据。In order to study the effect of Ca^(2+)on the accumulation of cadmium in rice seedlings under cadmium stress,and the differences in cadmium absorption capacity of different rice varieties.In this study,the nutrient solution culture method was set to add 4 different concentrations of Ca^(2+)(0,0.5,1,2 g/L)under 2 cadmium stress concentrations(1,2 mg/L)to study the effect of Ca^(2+)on cadmium absorption and transportion at the seedling stage of rice varieties Hongyou 2 and Heinuo 72 and hybrid varieties C Liangyou Huazhan and Yixiangyou 2115.The results showed that the strong and weak relationships the absorption capacity of cadmium of various rice varieties were:Yixiangyou 2115>C Liangyouhuazhan>Hongyou 2>Heinuo 72,and the addition of Ca^(2+)could significantly reduce cadmium content in rice roots,leaf sheaths and leaves,and the root system of Hongyou 2,Heinuo 72,C Liangyou Huazhan and Yixiangyou 2115 were significantly reduced by 58.39%,71.38%,51.71%,80.21%under the treatment of cadmium concentration of 2 mg/L and addition of 2 g/L Ca^(2+)and leaf sheaths were significantly reduced by 39.03%,60.54%,67.77%and 73.59%;leaves were significantly reduced by 46.39%,56.77%,71.73%,and 59.35%,respectively.Adding Ca^(2+)could reduce the transfer of cadmium in C Liangyouhuazhan from the root to the leaf sheath and leaves,and increase the transfer of cadmium in Yixiangyou 2115 from the root to the leaf sheath and leaves.The transfer coefficient of Hongyou 2 and Heinuo 72 was not obvious different.It was seen that Ca^(2+)could reduce the absorption of cadmium in the seedling stage of rice,which could provide a scientific basis for further discussion on the safe use of Ca^(2+)in the soil of cadmium-contaminated paddy soils in the karst area.

关 键 词：钙离子 镉胁迫 水稻品种 吸收 转运 

分 类 号：S511[农业科学—作物学]