Mechanism of Zinc absorption in plants: uptake, transport, translocation and accumulation

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• 作者：Neha Gupta ; Hari Ram…
• 关键词：Zn absorption ; Zn biofortification ; Zn hyperaccumulators ; ZIP transporters
• 刊名：Reviews in Environmental Science and Biotechnology
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：15
• 期：1
• 页码：89-109
• 全文大小：781 KB
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• 作者单位：Neha Gupta (1)
  Hari Ram (1)
  Balwinder Kumar (2)
  
  1. Department of Plant Breeding and Genetics, Punjab Agricultural University, Ludhiana, 141004, India
  2. Department of Animal Genetics and Breeding, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, 141004, India
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Environmental Biotechnology
  Microbiology
  Atmospheric Protection, Air Quality Control and Air Pollution
  
• 出版者：Springer Netherlands
• ISSN：1572-9826

文摘

Zinc (Zn) is an essential micronutrient for plants and animals. Unfortunately, deficiency of Zn in humans has increased on a global scale. The main reason of this micronutrient deficiency is dietary intakes of food with low Zn levels. Adoption of biofortification approaches would result in Zn enrichment of target tissue to a considerable extent. However, there is a basic need to understand Zn absorption mechanisms in plants prior to exploitation of such practical approaches. Zn absorption is a complex physiological trait which is mainly governed by Zn transporters and metal chelators of plant system. Plant growth stage, edaphic factors, season etc. also influence Zn efficiency of particular species. Molecular studies in Zn hyperaccumulators have already demonstrated the participation of specific Zn transporters, vacuolar sequestration and detoxification mechanisms in maintenance of Zn homeostasis. These have been described in detail in present review and provide opportunities for utilization in biofortification programmes. However, issues such as lesser bioavailability of Zn in target organ, uptake of toxic divalent cations (Cd, Ni, Pb, As etc.) along with Zn, sink activity and dilution in Zn concentration in response to sink number etc. in biofortified crops need further investigation. In order to design novel strategy in biofortification programmes, future researches should focus on physiological performance and yield penalties in concerned crop, metabolic load in term of organic acid production and crosstalk of Zn with other mineral nutrients under low and high Zn conditions.