Department of Botany, University of Agriculture, Faisalabad, Pakistan.
Institute of Soil and Environmental Sciences, University of Agriculture, Faisalabad, Pakistan.
Bull Environ Contam Toxicol. 2021 May;106(5):852-858. doi: 10.1007/s00128-021-03183-x. Epub 2021 Mar 26.
Nutritional status of people can be improved by enhancing zinc (Zn) and iron (Fe) content in cereals used as staple mainly in poor resource countries. Zinc and Fe were applied through soil and foliage in a study to biofortify wheat grains. Foliar application of both micronutrients increased the growth and grain vigor as compared to soil application and control. Also, foliar application significantly enhanced Zn and Fe concentration in grain pre-dominantly localized in aleurone layer. Exogeneous application of Fe and Zn was found beneficial for plant growth and enhanced Fe and Zn concentrations in grain, however aleurone layer and embryonic region of the grain showed higher accumulations than that in endosperm. Therefore, understanding of physiological and molecular pathways for uptake and localization of Fe and Zn in wheat grains need to be critically examined to improve their concentration in grain to achieve the biofortification targets.
通过提高主要在资源贫乏国家用作主食的谷物中的锌（Zn）和铁（Fe）含量，可以改善人们的营养状况。在这项研究中，通过土壤和叶片向小麦施用这两种微量营养素，以生物强化小麦籽粒。与土壤施用和对照相比，叶片施用这两种微量营养素均可显著促进生长和籽粒活力。此外，叶片施用还可显著提高籽粒中 Zn 和 Fe 的浓度，主要集中在糊粉层。外源施用 Fe 和 Zn 有利于植物生长，并提高了籽粒中的 Fe 和 Zn 浓度，但糊粉层和胚乳区域的积累量高于胚乳。因此，需要严格检查小麦籽粒中 Fe 和 Zn 吸收和定位的生理和分子途径，以提高其在籽粒中的浓度，从而实现生物强化目标。
