Combined effects of glufosinate ammonium and temperature on the growth, photosynthetic pigment content and oxidative stress response of Chlorella sp. and Pseudokirchneriella subcapitata

Yeo, Bann Siang and Chu, Wan Loy and Wong, Chiew Yen and Kok, Yih Yih and Phang, Siew Moi and Tan, Boon Keat and Mustafa, Emienour Muzalina (2018) Combined effects of glufosinate ammonium and temperature on the growth, photosynthetic pigment content and oxidative stress response of Chlorella sp. and Pseudokirchneriella subcapitata. Journal of Applied Phycology, 30 (6). pp. 3043-3055. ISSN 0921-8971

Full text not available from this repository.
Official URL: https://doi.org/10.1007/s10811-018-1613-0

Abstract

There has been concern over the potential adverse effects of glufosinate ammonium, a widely used herbicide, on microalgae. This study aimed to assess the combined effects of glufosinate and temperature on Chlorella sp. CHSS262, which was isolated from a farmland in Malaysia, in comparison with the model microalga Pseudokirchneriella subcapitata. The following parameters were assessed: growth, pigment content and oxidative stress response. Results showed that Chlorella sp. (EC25 = 120 μg mL−1) was more tolerant to glufosinate than P. subcapitata (EC25 = 43 μg mL−1) when grown at 28 °C. Both microalgae were then exposed to glufosinate at EC25 at different temperatures (10, 18, 28, 33 and 38 °C) for 8 days. While P. subcapitata could grow from 10 to 38 °C, with optimal temperature between 18 and 28 °C, the lower temperature limit of Chlorella sp. was 18 °C. There was only minimal growth inhibitory effect of glufosinate on Chlorella sp. over the range of temperatures tested. In comparison, the inhibitory effect of glufosinate on P. subcapitata was less pronounced at extreme temperatures (10 and 38 °C) compared to that at 18 to 33 °C. High ROS levels and increased lipid peroxidation were detected in P. subcapitata at 10 and 38 °C in both the control and glufosinate-treated cultures. Principal component analysis (PCA) showed that there was significant correlation between ROS and lipid peroxidation in P. subcapitata but not in Chlorella sp. Overall, the results showed that Chlorella sp. and P. subcapitata responded differently to temperature and glufosinate, especially in regard to oxidative stress response although both species were highly resistant to the herbicide.

Item Type: Article
Uncontrolled Keywords: Chlorella; Glufosinate ammonium; Herbicides; Pseudokirchneriella subcapitata; Temperature
Subjects: Q Science > Q Science (General)
Divisions: Faculty of Science
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 13 Feb 2019 04:28
Last Modified: 13 Feb 2019 04:28
URI: http://eprints.um.edu.my/id/eprint/20282

Actions (login required)

View Item View Item