The role of arbuscular mycorrhizas in improving plant zinc nutrition under low soil zinc concentrations: a review
The role of arbuscular mycorrhizas in improving plant zinc nutrition under low soil zinc concentrations: a review
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DOI：
10.1007/s11104-008-9559-7
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发表时间：
2008-03-01
期刊：
影响因子：
4.9
通讯作者：
Cavagnaro, Timothy R.
中科院分区：
文献类型：
--
作者：
Cavagnaro, Timothy R.
世界上许多土壤都缺乏锌 (Zn)。因此，许多作物的生长、产量和组织锌浓度下降。农作物可食用部分中锌浓度的降低对人类锌营养具有重要影响；这是全球关注的一个问题。大多数陆生植物物种形成丛枝菌根（AM），其特化土壤真菌数量相对有限。丛枝菌根真菌（AMF）可以吸收包括锌在内的营养物质，并将其转移到植物中，从而增强植物的营养。在土壤锌浓度较高的情况下，AM 的形成也可以“防止”植物组织中锌的积累达到高浓度。本文简要回顾了 AM 在增强植物锌营养方面的作用，主要是在土壤锌浓度较低的情况下。探讨了 Zn 对 AMF 根部定植的影响、AMF 对 Zn 的直接吸收、AM 在田间生长植物的 Zn 营养中的作用以及 AM 的 Zn 分子生理学的新兴方面。在未来潜在研究的背景下确定和讨论新出现的知识差距。
Many of the world's soils are zinc (Zn) deficient. Consequently, many crops experience reduced growth, yield and tissue Zn concentrations. Reduced concentrations of Zn in the edible portions of crops have important implications for human Zn nutrition; this is a cause of global concern. Most terrestrial plant species form arbuscular mycorrhizas (AM) with a relatively limited number of specialized soil fungi. Arbuscular mycorrhizal fungi (AMF) can take up nutrients, including Zn, and transfer them to the plant, thereby enhancing plant nutrition. Under high soil Zn concentrations the formation of AM can also 'protect' against the accumulation of Zn in plant tissues to high concentrations. Here, a short review focusing on the role of AM in enhancing plant Zn nutrition, principally under low soil Zn concentrations, is presented. Effects of Zn on the colonisation of roots by AMF, direct uptake of Zn by AMF, the role of AM in the Zn nutrition of field grown plants, and emerging aspects of Zn molecular physiology of AM, are explored. Emergent knowledge gaps are identified and discussed in the context of potential future research.