草莓对I-、IO3-的吸收特征及对其品质的影响

doi:10.11983/CBB16021

植物学报 ›› 2017, Vol. 52 ›› Issue (2): 167-174.DOI: 10.11983/CBB16021

草莓对I^-、IO₃^-的吸收特征及对其品质的影响

刘会萍¹, 洪春来², 李睿¹, 宋明义³, 刘嘉伟¹, 戴之希¹, 周骏¹, 翁焕新^1,^*()

¹浙江大学环境与生物地球化学研究所, 杭州 310027
²浙江省农业科学院, 杭州 310021
³中国地质调查局农业地质应用研究中心, 杭州 311201

收稿日期:2016-01-29 接受日期:2016-05-06 出版日期:2017-03-01 发布日期:2017-04-05
通讯作者: 翁焕新
作者简介:# 共同第一作者
基金资助:
浙江省国土资源厅地质勘查项目(No.2014002)和国家自然科学基金(No.40873058, No.40373043)

Absorption Characteristics of Strawberry on I^-, IO₃^- and the Effects on the Quality

Liu Huiping¹, Hong Chunlai², Li Rui¹, Song Mingyi³, Liu Jiawei¹, Dai Zhixi¹, Zhou Jun¹, Weng Huanxin^*()

¹Institute of Environment & Biogeochemistry, Zhejiang University, Hangzhou 310027, China
²Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
³Geological Research Center For Agricultural Applications, China Geological Surver, Hangzhou 311201, China

Received:2016-01-29 Accepted:2016-05-06 Online:2017-03-01 Published:2017-04-05
Contact: Weng Huanxin
About author:# Co-first authors

摘要/Abstract

摘要： 提高植物性食品中碘的含量对人体自然补碘具有重要作用。该文通过水培模拟实验, 揭示了草莓(Fragaria ananassa)对I^-和IO₃^-的吸收特征, 在分析不同外源碘浓度下草莓根系以上部分生物量的基础上, 通过对比吸收外源碘前后维生素C、可溶性糖、总酸度和硝酸盐含量的变化, 评价了草莓吸收I^-和IO₃^-对果实品质的影响。研究结果表明, 草莓对碘的吸收量随营养液中I^-和IO₃^-浓度的增加而增加, 相同浓度下草莓吸收的I^-明显多于IO₃^-, 草莓吸收适量的碘可以促进植株生长, 不仅使生物量提高, 而且会增加草莓果实维生素C和可溶性总糖的含量, 从而提高品质。在营养液浓度为0.5-5.0 mg∙kg^-1时, 草莓吸收IO₃^-后会增加果实总酸度和硝酸盐的含量, 降低草莓果实品质。在营养液浓度为0.25-2.5 mg∙kg^-1时, 草莓吸收I^-后会使果实中总酸度和硝酸盐的含量明显降低, 果实的品质有所提高。研究结果为科学培育含碘草莓提供了技术支撑。

关键词: 草莓, I-, IO3-, 吸收特征, 果实品质

Abstract: To improve the iodine content of plant foods plays an important role in supplement of natural iodine for humans. We performed a hydroponic experiment to reveal the characteristics of I^-, IO₃^- uptake by strawberry plants. We measured the aboveground biomass of strawberry plants grown in solution at various iodine concentrations. The effects of I^-, IO₃^- absorption on fruit quality were evaluated in terms of variations in content of vitamin C, soluble sugar, total acidity and nitrate of strawberries under different iodine treatments. The higher the I^-, IO₃^- concentration of the solution, the more iodine the strawberry plants absorbed. The absorption was higher for I^- than IO₃^- under the same exogenous iodine concentration. A proper dose of iodine application promoted the growth of strawberry plants, which increased the biomass and also improved fruit quality by increasing vitamin C and soluble sugar content. Grown with 0.5-5.0 mg∙kg^-1 IO₃^-solution, the total acidity and nitrate content of strawberries increased, which reduced the quality of strawberries. Under 0.25-2.5 mg∙kg^-1 I^-treatment, the total acidity and nitrate content of strawberries decreased, thereby enhancing the quality of strawberries. These results may provide technical support for scientific cultivation of iodine-enriched strawberry.

Key words: strawberry, I^-, IO^3-, absorption characteristic, fruit quality

刘会萍, 洪春来, 李睿, 宋明义, 刘嘉伟, 戴之希, 周骏, 翁焕新. 草莓对I^-、IO₃^-的吸收特征及对其品质的影响. 植物学报, 2017, 52(2): 167-174.

Liu Huiping, Hong Chunlai, Li Rui, Song Mingyi, Liu Jiawei, Dai Zhixi, Zhou Jun, Weng Huanxin. Absorption Characteristics of Strawberry on I^-, IO₃^- and the Effects on the Quality. Chinese Bulletin of Botany, 2017, 52(2): 167-174.

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图/表 6

图1 草莓各器官碘的吸收量(A) 果实; (B) 茎; (C) 叶; (D) 根

Figure 1 Iodine absorption of different strawberry organs in various I-, IO3- concentration (A) Fruit; (B) Stem; (C) Leaf; (D) Root

图2 草莓叶与果实碘含量之间的相关性分析

Figure 2 The iodine content correlation analysis between leaves and fruits of strawberry

图3 不同浓度I-、IO3-培养后草莓地上部分的生物量

Figure 3 Aboveground biomass of strawberry treated with different concentration of I- or IO3-

图4 不同浓度I-、IO3-培养后草莓维生素C (Vc)和可溶性总糖的含量

Figure 4 Content of vitamin C (Vc) and total soluble sugar in strawberry treated with different concentration of I- or IO3-

图5 草莓叶、茎及果实中碘含量三角相图

Figure 5 Triangle diagram of iodine content in the leaf, stem and fruit of strawberry

图6 不同浓度I-、IO3-培养后草莓中总酸度(A)和硝酸盐(B)的含量

Figure 6 Content of total acidity (A) and nitrate (B) in strawberry treated with different concentration of I- or IO3-

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草莓对I^-、IO₃^-的吸收特征及对其品质的影响

Absorption Characteristics of Strawberry on I^-, IO₃^- and the Effects on the Quality

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