Influence of early stages of arbuscular mycorrhiza on uptake of zinc and phosphorus by red clover from a low-phosphorus soil amended with zinc and phosphorus
Influence of early stages of arbuscular mycorrhiza on uptake of zinc and phosphorus by red clover from a low-phosphorus soil amended with zinc and phosphorus
复制标题
锌磷改良低磷土壤中丛枝菌根早期对红三叶草吸收锌磷的影响
DOI：
10.1016/s0045-6535(02)00227-8
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发表时间：
2003-02-01
期刊：
影响因子：
8.8
通讯作者：
Christie, P
中科院分区：
文献类型：
--
作者：
Bi, YL;Li, XL;Christie, P
在盆栽试验中，红三叶草（Trifolium pratense）生长在灭菌的Zn补充的低有效P土壤（0、50或400 mg Zn kg（-1））中，添加或不添加100 mg kg（-1）P，接种或不接种AM真菌G。苔藓。40天后收获时，AM真菌仍处于早期侵染阶段，平均只有14-38%的根长被侵染。AM真菌在低磷土壤中的定殖率最高，而在添加400 mg·kg-1 Zn的土壤中定殖率最低。芽产量最高的AM植物与添加P，但根产量不受AM接种。施磷100 mg kg（-1）处理的地上部和地下部产量较高，施锌400 mg kg（-1）处理的地上部和地下部产量低于施锌50 mg kg（-1）或不施锌的对照。AM植物地上部和根系的磷浓度很少较高，但地上部的磷吸收量较高，在AM植物中加入磷。Zn和Cu的浓度在根中比在地上部高得多。AM植物地上部和根系Zn和地上部Cu含量较低，而根系Cu含量较高。AM处理植株生长后土壤残留pH值较高，土壤残留全锌也较高，表明AM植株对锌的吸收较低。土壤溶液pH值较高的AM处理，和土壤溶液Zn较低的菌根的存在。结果进行了讨论，在AM保护植物对过量的拍摄锌吸收。(C)2002爱思唯尔科技有限公司版权所有。
In a pot experiment, red clover (Trifolium pratense) was grown in sterilized Zn-amended low available P soil (0, 50 or 400 mg Zn kg(-1)) with or without 100 mg kg(-1) added P and with or without inoculation with the arbuscular mycorrhizal (AM) fungus G. mosseae. When the plants were harvested after 40 days, AM colonization of the roots was still at an early stage, with only 14-38% of total root length colonized on average. AM colonization was highest in low-P soil, and was lowest in soil amended with 400 mg Zn kg(-1). Shoot yields were highest in AM plants with added P, but root yields were unaffected by AM inoculation. Shoot and root yields were higher with 100 mg added P kg(-1) soil, but lower with 400 mg Zn kg(-1) than 50 mg Zn kg(-1) or controls unamended with Zn. Shoot and root P concentrations were seldom higher in AM plants, but shoot P offtakes were higher in AM plants with added P.Concentrations of Zn and Cu were much higher in the roots than in the shoots. Shoot and root Zn and shoot Cu were lower, but root Cu was higher, in AM plants. Soil residual pH after plant growth was higher in AM treatments, and residual total Zn was also higher, indicating lower Zn uptake by AM plants. Soil solution pH was higher in AM treatments, and soil solution Zn was lower in the presence of mycorrhiza. The results are discussed in terms of AM protection of the plants against excessive shoot Zn uptake. (C) 2002 Elsevier Science Ltd. All rights reserved.