Wheat (Triticum aestivum) NAM proteins regulate the translocation of iron, zinc, and nitrogen compounds from vegetative tissues to grain
| العنوان: | Wheat (Triticum aestivum) NAM proteins regulate the translocation of iron, zinc, and nitrogen compounds from vegetative tissues to grain |
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| المؤلفون: | Cristobal Uauy, Michael A. Grusak, Jorge Dubcovsky, Brian M. Waters |
| المصدر: | Journal of experimental botany, vol 60, iss 15 Waters, BM; Uauy, C; Dubcovsky, J; & Grusak, MA. (2009). Wheat (Triticum aestivum) NAM proteins regulate the translocation of iron, zinc, and nitrogen compounds from vegetative tissues to grain. Journal of Experimental Botany, 60(15), 4263-4274. doi: 10.1093/jxb/erp257. UC Davis: Retrieved from: http://www.escholarship.org/uc/item/7df2q1x5Test |
| سنة النشر: | 2009 |
| مصطلحات موضوعية: | Crop and Pasture Production, grain protein content, senescence, Physiology, Nitrogen, Iron, Plant Biology & Botany, Biofortification, chemistry.chemical_element, Plant Biology, Plant Science, Zinc, Biology, Nutrient, Gene Expression Regulation, Plant, Genetics, Poaceae, Nitrogen cycle, Triticum, Plant Proteins, Phosphorus, zinc, food and beverages, Aerial, Biological Transport, Plant, Plant Components, Aerial, Hydroponics, Potting soil, Horticulture, remobilization, Agronomy, chemistry, Gene Expression Regulation, Plant Components, Transcription Factors |
| الوصف: | The NAM-B1 gene is a NAC transcription factor that affects grain nutrient concentrations in wheat (Triticum aestivum). An RNAi line with reduced expression of NAM genes has lower grain protein, iron (Fe), and zinc (Zn) concentrations. To determine whether decreased remobilization, lower plant uptake, or decreased partitioning to grain are responsible for this phenotype, mineral dynamics were quantified in wheat tissues throughout grain development. Control and RNAi wheat were grown in potting mix and hydroponics. Mineral (Ca, Cu, Fe, K, Mg, Mn, P, S, and Zn) and nitrogen (N) contents of organs were determined at regular intervals to quantify the net remobilization from vegetative tissues and the accumulation of nutrients in grain. Total nutrient accumulation was similar between lines, but grain Fe, Zn, and N were at lower concentrations in the NAM knockdown line. In potting mix, net remobilization of N, Fe, and Zn from vegetative tissues was impaired in the RNAi line. In hydroponics with ample nutrients, net remobilization was not observed, but grain Fe and Zn contents and concentrations remained lower in the RNAi line. When Fe or Zn was withheld post-anthesis, both lines demonstrated remobilization. These results suggest that a major effect of the NAM genes is an increased efflux of nutrients from the vegetative tissues and a higher partitioning of nutrients to grain. |
| وصف الملف: | application/pdf |
| تدمد: | 1460-2431 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::57a096e7da438d870d6af3ddfafc1ed2Test https://pubmed.ncbi.nlm.nih.gov/19858116Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....57a096e7da438d870d6af3ddfafc1ed2 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14602431 |
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