scholarly journals Effects of High-Temperature Stress on Photosynthetic Characteristics and Antioxidant Enzyme System of Paeonia ostii

Phyton ◽  
2022 ◽  
Vol 91 (3) ◽  
pp. 599-615
Author(s):  
Xiaoxiao Wang ◽  
Ziwen Fang ◽  
Daqiu Zhao ◽  
Jun Tao
Keyword(s):  
High Temperature ◽  
Antioxidant Enzyme ◽  
Temperature Stress ◽  
Enzyme System ◽  
High Temperature Stress ◽  
Photosynthetic Characteristics ◽  
Antioxidant Enzyme System

Photosynthetic Capacity, Antioxidant Activity and Molecular Responses in Parthenocissus Quinquefolia (L.) Planch Under High Temperature Stress and Subsequent Recovery

2021 ◽  
Vol 50 (2) ◽  
pp. 433-436
Author(s):  
Yuan Xue Tao ◽  
Li Fu Ping
Keyword(s):  
High Temperature ◽  
Antioxidant Enzyme ◽  
Temperature Stress ◽  
Photosynthetic Capacity ◽  
D1 Protein ◽  
Temperature Limit ◽  
High Temperature Stress ◽  
Psii Activity ◽  
Increasing Temperature ◽  
Parthenocissus Quinquefolia

Photosynthetic capacity and photosystem II (PSII) activity decreased with increasing temperature, whereas antioxidant enzyme activity showed the opposite trend. High temperature stress induced a significant increase in Φf,D, and D1 protein turnover rate. Photosynthetic capacity, PSII activity, and antioxidant enzyme levels in plants treated at 35 and 40°C were restored to control levels upon stress relief, whereas those in plants grown at 45℃ were only partially restored. Therefore, the temperature limit for heat tolerance in Parthenocissus quinquefolia is between 40 and 45℃. Further, it was observed that antioxidant enzymes were crucial for high-temperature stress resistance in P. quinquefolia, with DEGP1 protein playing a major role in the rapid turnover of D1 protein for PSII repair. Bangladesh J. Bot. 50(2): 433-436, 2021 (June)

Photosynthetic characteristics and antioxidant enzyme system in high-chlorophyll rice Gc mutant

2012 ◽  
Vol 59 (5) ◽  
pp. 691-695 ◽  
Author(s):  
X. D. Niu ◽  
G. R. Li ◽  
Z. H. Kang ◽  
J. L. Huang ◽  
G. X. Wang
Keyword(s):  
Antioxidant Enzyme ◽  
Enzyme System ◽  
Photosynthetic Characteristics ◽  
Antioxidant Enzyme System

scholarly journals Compensatory growth in Microcystis aeruginosa after moderate high-temperature exposure

2015 ◽  
Author(s):  
Wei Han ◽  
Yuanshu Jing ◽  
Ting Li
Keyword(s):  
High Temperature ◽  
Antioxidant Enzyme ◽  
Chlorophyll A ◽  
Temperature Stress ◽  
Enzyme Activities ◽  
Compensatory Growth ◽  
Soluble Sugar ◽  
Recovery Phase ◽  
High Temperature Stress ◽  
Antioxidant Enzyme Activities

<p align="left">This study aimed to investigate the mechanisms involved in <em>Microcystis aeruginosa</em> (<em>M. aeruginosa</em>) compensatory growth after moderate high-temperature stress. In the experiment, <em>M. aeruginosa</em> were cultured for 3, 6, and 12 d at 35°C before being transferred to normal conditions (25°C), and then cultured for 30 days for recovery. The algae that were cultured constantly at 25°C were set as control. The results showed that the growth of <em>M. aeruginosa</em> was inhibited significantly by the moderate high-temperature stress. During the recovery phase, the <em>M. aeruginosa</em> cultured at 35°C for 3, 6, and 12 days exhibited under-compensation, over-compensation, and equal-compensation, respectively. To cope with moderate high-temperature stress, <em>M. aeruginosa</em> implement various mechanisms, including increasing antioxidant enzyme activities and chlorophyll a content; adjusting compatible solutes (soluble protein and sugar). The <em>M. aeruginosa</em> cultured at 35°C for 6 days has higher antioxidant enzyme activities, relatively low malondialdehyde content, and higher soluble sugar content during the recovery phase; therefore, <em>M. aeruginosa</em> cultured at 35°C for 6 days exhibited over-compensation growth. Grey correlation analysis revealed that the increase of chlorophyll a, soluble sugar, and superoxide dismutase activity play key roles in the compensatory growth of <em>M. aeruginosa</em>.</p>

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