Department of Soil Science, Federal University of Lavras, Brazil.
Brazilian Agricultural Research Corporation, Embrapa Cerrados, Planaltina, Brazil.
J Sci Food Agric. 2019 Jan 30;99(2):666-674. doi: 10.1002/jsfa.9231. Epub 2018 Aug 22.
Zinc (Zn) deficiency is a major human health concern worldwide, and biofortification (genetic and agronomic) is a complementary solution for increasing micronutrient contents, including Zn. Cassava (Manihot esculenta Crantz) has been used for Zn biofortification because it is an important staple crop in most countries affected by malnutrition and Zn deficiency. Thus studies on biofortification of this crop can improve its nutritional quality. Zn content in cassava clones enriched with β-carotene or lycopene and cultivated under different areas and soil managements was investigated to evaluate the influence of genotypic variation and agronomic management on Zn status in the plant.
A clone-specific response to total Zn content in the soil was found, with clones 26, 215, and 240 (β-carotene enriched) and clones 341 and 395 (lycopene enriched) being the most responsive. For both experiments, there was a positive interaction between total soil Zn and Zn content in the roots.
Our results suggest that, by combining plant breeding and agronomic strategies, it is possible to enrich cassava roots with both zinc and β-carotene or lycopene. © 2018 Society of Chemical Industry.
锌（Zn）缺乏是全世界范围内一个主要的人类健康问题，生物强化（遗传和农业）是增加包括 Zn 在内的微量营养素含量的一种补充方法。木薯（Manihot esculenta Crantz）已被用于 Zn 生物强化，因为它是大多数受营养不良和 Zn 缺乏影响的国家的重要主食作物。因此，对这种作物的生物强化研究可以提高其营养价值。本研究调查了富含β-胡萝卜素或番茄红素的木薯克隆体以及在不同地区和土壤管理下种植的 Zn 含量，以评估基因型变异和农业管理对植物 Zn 状况的影响。
发现克隆体对土壤中总 Zn 含量有特定的响应，其中克隆体 26、215 和 240（富含β-胡萝卜素）以及克隆体 341 和 395（富含番茄红素）的响应最大。对于这两个实验，土壤总 Zn 和根系 Zn 含量之间存在正相互作用。
我们的结果表明，通过结合植物育种和农业策略，可以使木薯根同时富含 Zn 和β-胡萝卜素或番茄红素。© 2018 英国化学学会。
