TY - JOUR
T1 - Effects of water temperature and light intensity on the acute toxicity of herbicide thiobencarb to a green alga, Raphidocelis subcapitata
AU - Tasmin, Rumana
AU - Shimasaki, Yohei
AU - Tsuyama, Michito
AU - Qiu, Xuchun
AU - Khalil, Fatma
AU - Mukai, Koki
AU - Khanam, Mst Ruhina Margia
AU - Yamada, Naotaka
AU - Fukuda, Shinji
AU - Kang, Ik Joon
AU - Oshima, Yuji
N1 - Funding Information:
Funding information This study was supported in part by the Research Grant for Young Investigators of the Faculty of Agriculture, Kyushu University, Japan and the JSPS Core-to-Core Program (B. Asia-Africa Science Platforms) “Collaborative Project for Soil and Water Conservation in Southeast Asian Watersheds”.
Publisher Copyright:
© 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2018/9/1
Y1 - 2018/9/1
N2 - The present study investigated how principal environmental factors such as temperature and light intensity change the toxicological properties of thiobencarb (TB) herbicide to the green alga, Raphidocelis subcapitata. At first, we investigated the inhibitory effect of TB (0, 15.6, 31.2, 62.4, and 125 μg L−1) on growth of R. subcapitata at five temperatures (10, 15, 20, 25, or 30 °C) for 144 h exposure and calculated 72- and 144-h effective concentration values (EC10, 20, and EC50) for growth rate. All EC values significantly decreased with an increasing temperature. The maximum quantum yield of photosystem II in R. subcapitata exposed to 125 μg L−1 of TB was also significantly inhibited with increased temperature. These physiological effects could explain the lower EC values at high temperatures. Then, single and interactive effects of TB, temperature, and light intensity on growth rate were investigated by three-way of analysis of variance. As a result, single and interactive effects were detected in all explanatory variables. These results suggest that temperature and light intensity change the acute toxicity parameter in R. subcapitata exposed to TB and must be considered in evaluating the risk of TB.
AB - The present study investigated how principal environmental factors such as temperature and light intensity change the toxicological properties of thiobencarb (TB) herbicide to the green alga, Raphidocelis subcapitata. At first, we investigated the inhibitory effect of TB (0, 15.6, 31.2, 62.4, and 125 μg L−1) on growth of R. subcapitata at five temperatures (10, 15, 20, 25, or 30 °C) for 144 h exposure and calculated 72- and 144-h effective concentration values (EC10, 20, and EC50) for growth rate. All EC values significantly decreased with an increasing temperature. The maximum quantum yield of photosystem II in R. subcapitata exposed to 125 μg L−1 of TB was also significantly inhibited with increased temperature. These physiological effects could explain the lower EC values at high temperatures. Then, single and interactive effects of TB, temperature, and light intensity on growth rate were investigated by three-way of analysis of variance. As a result, single and interactive effects were detected in all explanatory variables. These results suggest that temperature and light intensity change the acute toxicity parameter in R. subcapitata exposed to TB and must be considered in evaluating the risk of TB.
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U2 - 10.1007/s11356-018-2599-5
DO - 10.1007/s11356-018-2599-5
M3 - Article
C2 - 29946846
AN - SCOPUS:85049111562
SN - 0944-1344
VL - 25
SP - 25363
EP - 25370
JO - Environmental Science and Pollution Research
JF - Environmental Science and Pollution Research
IS - 25
ER -