مورد إلكتروني
Zinc allocation and re-allocation in rice
العنوان: | Zinc allocation and re-allocation in rice |
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المصدر: | ISSN: 1664-462X |
بيانات النشر: | 2014 |
تفاصيل مُضافة: | Stomph, T.J. Jiang, W. van der Putten, P.E.L. Struik, P.C. |
نوع الوثيقة: | Electronic Resource |
مستخلص: | Aims: Agronomy and breeding actively search for options to enhance cereal grain Zn density. Quantifying internal (re-)allocation of Zn as affected by soil and crop management or genotype is crucial. We present experiments supporting the development of a conceptual model of whole plant Zn allocation and re-allocation in rice. Methods: Two solution culture experiments using 70Zn applications at different times during crop development and an experiment on within-grain distribution of Zn are reported. In addition, results from two earlier published experiments are re-analyzed and re-interpreted. Results: A budget analysis showed that plant zinc accumulation during grain filling was larger than zinc allocation to the grains. Isotope data showed that zinc taken up during grain filling was only partly transported directly to the grains and partly allocated to the leaves. Zinc taken up during grain filling and allocated to the leaves replaced zinc re-allocated from leaves to grains. Within the grains, no major transport barrier was observed between vascular tissue and endosperm. At low tissue Zn concentrations, rice plants maintained concentrations of about 20 mg Zn kg-1 dry matter in leaf blades and reproductive tissues, but let Zn concentrations in stems, sheath, and roots drop below this level. When plant zinc concentrations increased, Zn levels in leaf blades and reproductive tissues only showed a moderate increase while Zn levels in stems, roots, and sheaths increased much more and in that order. Conclusions: In rice, the major barrier to enhanced zinc allocation towards grains is between stem and reproductive tissues. Enhancing root to shoot transfer will not contribute proportionally to grain zinc enhancement. |
مصطلحات الفهرس: | aerobic rice, biofortification, developing wheat grains, fertilization, micronutrients, nutrition, remobilization, soil-zinc, translocation, zn, info:eu-repo/semantics/article, Article/Letter to editor, info:eu-repo/semantics/publishedVersion |
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الإتاحة: | Open access content. Open access content info:eu-repo/semantics/openAccess Wageningen University & Research |
ملاحظة: | application/pdf Frontiers in Plant Science 5 (2014) ISSN: 1664-462X ISSN: 1664-462X English |
أرقام أخرى: | NLWUP oai:library.wur.nl:wurpubs/451033 https://research.wur.nl/en/publications/zinc-allocation-and-re-allocation-in-riceTest 10.3389/fpls.2014.00008 1200333090 |
المصدر المساهم: | WUR STAFF PUBNS From OAIster®, provided by the OCLC Cooperative. |
رقم الانضمام: | edsoai.on1200333090 |
قاعدة البيانات: | OAIster |
الوصف غير متاح. |