Hidden Hunger and Hidden Danger: Regional Gradients in Rice Grain Nutrient Elements, Vitamins B and E and Toxicants Arsenic and Cadmium Along a North-South Transect of Western Bangladesh
Hidden Hunger and Hidden Danger: Regional Gradients in Rice Grain Nutrient Elements, Vitamins B and E and Toxicants Arsenic and Cadmium Along a North-South Transect of Western Bangladesh
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DOI：
10.1007/s12403-023-00587-4
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发表时间：
2023-07-19
影响因子：
6.7
通讯作者：
Meharg，Caroline
中科院分区：
文献类型：
--
作者：
Meharg，Andrew A.;Carey，Manus;Meharg，Caroline
本文介绍了一项研究，旨在调查构成孟加拉国西部的 36 个邻近地区的稻谷营养成分（微量元素、常量元素和维生素）和有毒物质（砷和镉）的地理差异。此次调查共收集了500个商品稻样品，平均每个区15个样品、10.7个品种。针对水稻相关的 B 和 E 复合化合物开发了新的 LC-MS 方法。镉、锌向南减少，铜、DMA、无机砷、谷维素向北减少。铁、钾和维生素 B6 存在纵向梯度。在这些梯度中，镉和维生素 B6 的变化最大为两倍，锌的变化为 1.5 倍。梯度可能是由气候、地理环境、土壤、品种或所有因素的组合驱动的。最明显的梯度是从高海拔到低海拔以及从更新世到全新世土壤的转变，因为土地从北部的高地平原过渡到南部的海平面。大米是铜、磷、维生素 B1 和锌的重要来源，其次是铁、B3、B6 和钾的来源。它是维生素 E 和钙的贫乏来源。
Here is presented a study to investigate the geographic variation in rice grain nutrients (trace and macro-elements and vitamins) and toxicants (arsenic species and cadmium) across a contiguous strip of 36 districts that constitute western Bangladesh. The survey collected ~ 500 market rice samples, averaging 15 samples and 10.7 cultivars per district. New LC-MS methods were developed for rice relevant, B and E complex compounds. Cadmium and zinc decreased southward, while copper, DMA, inorganic arsenic and oryzanols decreased northwards. There was a longitudinal gradient for iron, potassium, and vitamin B6. The greatest changes ~ twofold for cadmium and vitamin B6, and 1.5 for zinc across these gradients. The gradients may be driven by climate, geographical setting, soils, or cultivar, or a combination of all. The most obvious gradient was the transition from high to low altitude and from Pleistocene to Holocene soils as land transitioned from the upland plains of the north to sea-level in the south. Rice is a very important source of copper, phosphorus, vitamin B1, and zinc, and to a lesser extent iron, B3, B6, potassium. It is a poor source of vitamin E and calcium.