不同类型茄对镉的富集及嫁接对镉富集特性的影响

生态学杂志

不同类型茄对镉的富集及嫁接对镉富集特性的影响

秦秦^1,4,李雪梅³,台培东^1**,刘宛¹,冯倩⁵,邓鑫^1,4,马俊^2,4

(¹中国科学院沈阳应用生态研究所污染生态与环境工程重点实验室，沈阳 110016； ²中国科学院沈阳应用生态研究所森林与土壤生态国家重点实验室，沈阳 110164； ³沈阳师范大学化学与生命科学学院，沈阳 110034； ^4中国科学院大学，北京 100049； ⁵江西省水利科学研究院，南昌 330029)

出版日期:2013-08-10 发布日期:2013-08-10

Cadmium accumulation in different eggplant cultivars and the effects of grafting on the cadmium accumulation characteristics.

QIN Qin^1,4, LI Xue-mei³, TAI Pei-dong^1**, LIU Wan¹, FENG Qian⁵, DENG Xin^1,4, MA Jun^2,4

(¹Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; ²State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110164, China; ^3College of Chemistry and Life Science, Shenyang Normal University, Shenyang 110034, China; ^4Graduate University of Chinese Academy of Sciences, Beijing 100049, China; ⁵Jiangxi Provincial Institute of Water Sciences, Nanchang 330029, China)

Online:2013-08-10 Published:2013-08-10

摘要/Abstract

摘要： 以普通茄（Solanum melongena，绿健）和野生茄（S. torvum，托鲁巴姆）为实验材料，通过对嫁接处理前后7叶龄植株开展7 d含Cd水培实验（Cd浓度为0.1 mg·L^-1），研究Cd在不同类型茄体内的富集特征以及嫁接对茄体内Cd运输途径和富集特性的影响。结果表明：绿健对Cd的富集能力强于托鲁巴姆。不同部位器官中Cd的分布特征为根>叶>茎，其中植株吸收的Cd 80.0%左右富集于根部；不同部位叶片，Cd优先富集于植株顶端幼叶中。嫁接使得Cd在茄地上部的富集量明显减少，接穗Cd的富集量均显著低于砧木：以绿健为对照，正向嫁接减少了48.4%，反向嫁接减少了34.2%，托鲁巴姆自嫁接减少了88.5%；以托鲁巴姆为对照，仅自嫁接地上部Cd富集量减少了58.0%。嫁接减少Cd在茄体内富集的原因可能是嫁接使接穗与砧木植物韧皮部结构产生了差异，由此推断Cd在茄体内的长距离运输过程中韧皮部起到了关键作用。

关键词: 栽培大麦, β-葡聚糖, 青藏高原, 分布特征

Abstract: A hydroponic experiment was conducted to study the cadmium (Cd) accumulation in different eggplant cultivars (common Solanum melongena and wild S. torvum) and the effects of grafting on the Cd accumulation and transportation. 0.1 mg Cd·L^-1 was added to the nutrient solution for 7 days after 44 days of eggplant growth. The Cd accumulation in S. melongena was higher than that in S. torvum. The Cd concentrations in different parts of the eggplants ranked as root > leaf > stem, and the accumulated Cd in roots accounted for approximately 80.0% of the total. The Cd concentration accumulated in young leaves was higher than that in old leaves growing on the same stems. Grafting decreased the Cd accumulation in shoots significantly, and the Cd concentration in scions was significantly lower than that in rootstocks. As compared with S. melongena, grafting on S. torvum reduced the shoot Cd concentration by 48.4%, grafting on S. melongena reduced the shoot Cd concentration by 34.2%, while selfgrafting on S. torvum reduced the shoot Cd concentration by 88.5%. As compared with S. torvum, the shoot Cd concentration of the eggplants selfgrafted on S. torvum reduced by 58.0%. The decrease of the Cd accumulation in eggplant shoots due to grafting could be induced by the discrepancies between the phloem structure of rootstock and scion plants after grafting. It was speculated that phloem played an important role in the Cd transportation from root to shoot.

Key words: β-glucan, Qinghai-Tibet Plateau, distribution characteristics., cultivated barley

秦秦1,4,李雪梅3,台培东1**,刘宛1,冯倩5,邓鑫1,4,马俊2,4. 不同类型茄对镉的富集及嫁接对镉富集特性的影响[J]. 生态学杂志.

QIN Qin1,4, LI Xue-mei3, TAI Pei-dong1**, LIU Wan1, FENG Qian5, DENG Xin1,4, MA Jun2,4. Cadmium accumulation in different eggplant cultivars and the effects of grafting on the cadmium accumulation characteristics.[J]. cje.

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