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小白菜和空心菜对不同形态碘的吸收
引用本文:谢伶莉,翁焕新,洪春来,严爱兰. 小白菜和空心菜对不同形态碘的吸收[J]. 植物营养与肥料学报, 2007, 13(1): 123-128. DOI: 10.11674/zwyf.2007.0121
作者姓名:谢伶莉  翁焕新  洪春来  严爱兰
作者单位:1.浙江大学环境与生物地球化学研究所 浙江杭州310027
摘    要:通过营养液培养试验研究了小白菜和空心菜对不同形态碘(I-、IO3-和CH2ICOO-)的吸收特征。研究结果表明,低水平的外源碘能促进小白菜和空心菜的生长;在0~1.0.mg/L(以I计算)的碘水平范围内,小白菜和空心菜对碘的吸收量随外源碘水平的提高而增加;对不同形态碘吸收量大小顺序为:CH2ICOO-I-IO3-。小白菜和空心菜根部和地上部分中碘的含量之间呈显著相关性,其中小白菜根部和地上部分中碘的含量比约为2∶1;空心菜根部和地上部分碘的含量比约为1∶1,反映了不同蔬菜对碘吸收的差异性。

关 键 词:小白菜   空心菜   I-   IO3-   CH2ICOO-   吸收
文章编号:1008-505X(2007)01-0123-06
收稿时间:2005-11-03
修稿时间:2006-01-04

Uptake of bok-choy and Ipomoea aquatica Forsk to iodine species
XIE Ling-li,WENG Huan-xin,HONG Chun-lai,YAN Ai-lan. Uptake of bok-choy and Ipomoea aquatica Forsk to iodine species[J]. Plant Nutrition and Fertilizer Science, 2007, 13(1): 123-128. DOI: 10.11674/zwyf.2007.0121
Authors:XIE Ling-li  WENG Huan-xin  HONG Chun-lai  YAN Ai-lan
Affiliation:1.Institute of Environment & Biogeochemistry;Zhejiang University;Hangzhou 310027;China
Abstract:A hydroponic experiment was carried out to investigate the influence of iodine species: iodide(I-),iodate(IO3-) and iodoacetic acid(CH2ICOO-) on iodine uptake by leafy vegetables(Bok-choy and Ipomoea aquatica Forsk). The results show that low level of iodine can efficiently promote the biomass of Bok-choy and Ipomoea aquatica Forsk.When iodine level in the nutrient solution from 0 to 1.0 mg/L,the iodic quantities uptaked by bok-choy and Ipomoea aquatica Forsk are enhanced with the iodine levels in nutrient solution increase.The rank of iodine species by Bok-choy and Ipomoea aquatica Forsk is CH2ICOO->I->IO3-.There is a significant correlativity between the I contents in shoots and roots of bok-choy and Ipomoea aquatica Forsk.The ratios of I contents in roots to in shoots of bok-choy and Ipomoea aquatica Forsk are roughly 2∶1 and 1∶1,respectively,which indicates the differences in iodine uptaked by plants.
Keywords:I-  IO3-  CH2ICOO-
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