TY - JOUR
T1 - Glyphosate spray drift in Coffea arabica - sensitivity of coffee plants and possible use of shikimic acid as a biomarker for glyphosate exposure
AU - Schrübbers, Lars Christoph
AU - Valverde Mena, Bernal Eduardo
AU - Sørensen, Jens Christian
AU - Cedergreen, Nina
PY - 2014/10/1
Y1 - 2014/10/1
N2 - Glyphosate is widely used in coffee plantations to control weeds. Lacking selectivity, glyphosate spray drift is suspected to cause adverse effects in coffee plants. Symptoms caused by glyphosate can be similar to those produced by other stress factors. However, shikimic acid accumulation should be a useful biomarker for glyphosate exposure as shown for other crops. The aim of this study was to assess the sensitivity of coffee plants towards glyphosate on different biological response variables and to evaluate the use of shikimic acid as biomarker. Dose-response experiments yielded ED50 values (50% effect dose) in the range of 38-550ga.e.ha-1 depending on the quantitative or qualitative variable monitored. The frequency of plants showing symptoms was the most sensitive variable. The best sampling time for shikimic acid accumulation was 1-2weeks after glyphosate application, depending on experimental conditions. The highest shikimic acid accumulation was observed in young leaves.Shikimic acid is a suitable biomarker for a glyphosate exposure in coffee, using only young leaves for the analysis. Young coffee plants are susceptible to glyphosate damage. If symptoms are absent the risk of severe crop damage or yield loss is low.
AB - Glyphosate is widely used in coffee plantations to control weeds. Lacking selectivity, glyphosate spray drift is suspected to cause adverse effects in coffee plants. Symptoms caused by glyphosate can be similar to those produced by other stress factors. However, shikimic acid accumulation should be a useful biomarker for glyphosate exposure as shown for other crops. The aim of this study was to assess the sensitivity of coffee plants towards glyphosate on different biological response variables and to evaluate the use of shikimic acid as biomarker. Dose-response experiments yielded ED50 values (50% effect dose) in the range of 38-550ga.e.ha-1 depending on the quantitative or qualitative variable monitored. The frequency of plants showing symptoms was the most sensitive variable. The best sampling time for shikimic acid accumulation was 1-2weeks after glyphosate application, depending on experimental conditions. The highest shikimic acid accumulation was observed in young leaves.Shikimic acid is a suitable biomarker for a glyphosate exposure in coffee, using only young leaves for the analysis. Young coffee plants are susceptible to glyphosate damage. If symptoms are absent the risk of severe crop damage or yield loss is low.
U2 - 10.1016/j.pestbp.2014.08.003
DO - 10.1016/j.pestbp.2014.08.003
M3 - Journal article
C2 - 25307461
SN - 0048-3575
VL - 115
SP - 15
EP - 22
JO - Pesticide Biochemistry and Physiology
JF - Pesticide Biochemistry and Physiology
ER -