期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 67, 期 47, 页码 13010-13020出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.9b05630
关键词
Glycine max; manganese; glyphosate; foliar uptake; XRF; XANES; SEM
资金
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior, Brasil (CAPES) [001]
- National Council for Scientific and Technological Development (CNPq) [133954/2018-8]
- Sao Paulo Research Foundation (FAPESP) [2018/13401-7, 2015/05942-0, 2015/19121-8]
- CNPq [308007/2016-6]
Increasing the yield of soybean is a challenge to humankind dependent on several management practices, such as fertilizing and weed control. While glyphosate contributes to controlling weeds, it can interfere with spray mixture stability and, supposedly, complex with micronutrients within the plant tissue. This study investigated the effects of glyphosate on soybean foliar uptake and transport of Mn supplied as MnSO4, MnHPO3, Mn-ethylenediamine tetraacetic acid (EDTA), and MnCO3. These fertilizers induced ultrastructural changes in the leaf cuticle, regardless of the glyphosate mixture. Except for MnCO3, all tested sources increased the Mn content in the petiole. The mixture of glyphosate impaired Mn transport from MnSO4 and MnHPO3, but no evidence of Mn-glyphosate complexation within the plant was found. Manganese is rather transported in a similar chemical environment regardless of the source, except for Mn-EDTA, which was absorbed and transported in its pristine form. Interferences of glyphosate seem to be related to complexations in the tank mixture rather than affecting nutrients' metabolism.
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