Interactive effects of temperature and light intensity on photosynthesis and antioxidant enzyme activity in Zizania latifolia Turcz. plants

2013 ◽  
Vol 51 (1) ◽  
pp. 127-138 ◽  
Author(s):  
N. Yan ◽  
X. F. Xu ◽  
Z. D. Wang ◽  
J. Z. Huang ◽  
D. P. Guo
Keyword(s):  
Enzyme Activity ◽  
Light Intensity ◽  
Antioxidant Enzyme ◽  
Antioxidant Enzyme Activity ◽  
Interactive Effects ◽  
Zizania Latifolia ◽  
Effects Of Temperature

scholarly journals Integrated biomarker responses of the submerged macrophyte Vallisneria spiralis via hydrological processes from Lake Poyang, China

2018 ◽  
Vol 5 (12) ◽  
pp. 180729 ◽  
Author(s):  
Yong Ji ◽  
Zhidong Yao ◽  
Jie Zhang ◽  
Xueru Wang ◽  
Jixiang Luo ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Light Intensity ◽  
Water Level ◽  
Antioxidant Enzyme ◽  
Enzyme Activities ◽  
Antioxidant Enzyme Activity ◽  
Water Levels ◽  
Antioxidant Enzyme Activities ◽  
Wetland Plant ◽  
Lake Poyang

Vallisneria spiralis , a widely distributed wetland plant, was used to reveal how the light intensity at the top of the plant, plant morphology and antioxidant enzyme activity respond to different hydrologic conditions from Lake Poyang, China. By designing a laboratory experiment simulating historical water levels of low, normal and high wetland plant submersion, this study aimed to elucidate the effects of different levels of flooding on growth and antioxidant enzyme activity for V. spiralis . The results showed that the plant crown light intensity of the treated group and control group (CG) first decreased and then increased along with the seasonal variation of the water level. The maximum and minimum values of the plant crown light intensity were observed in April and July, respectively. Similar to the CG, V. spiralis from the normal and low water level (LWL) groups was measured and had higher plant height growth in the flooding period from May to June, and the entire plant biomass also showed a steady growth trend in the same period. However, the plant growth of the high water level (HWL) group was lower during the whole simulation period, with negative growth in July. Antioxidant enzyme activities changed with the seasonal temperature, and the activity of the CG showed a rising trend. Compared with those of the CG, the antioxidant enzyme activities of the HWL group showed a ‘bell shaped’ trend, which was first significantly induced and then significantly inhibited. In addition, the peroxidase (POD) and catalase (CAT) activities from the LWL group in April were also significantly induced. The integrated biomarker response (IBR) index showed that a comprehensive biological index could well reflect the effects of seasonal water levels in Poyang Lake on the growth of the wetland plant V. spiralis . This study indicated that high flooding levels had the strongest negative effect on the growth and enzyme activity of the submerged plant V. spiralis .

scholarly journals Antioxidant enzyme activity in germination of Dalbergia spruceana seeds under different temperatures

2021 ◽  
Vol 43 ◽  
Author(s):  
Clenes Cunha Lima ◽  
Ely Simone Cajueiro Gurgel ◽  
Eduardo Euclydes de Lima e Borges
Keyword(s):  
Enzyme Activity ◽  
Heat Stress ◽  
Antioxidant Enzyme ◽  
Germination Percentage ◽  
Antioxidant Enzyme Activity ◽  
Percentage Germination ◽  
Germination Process ◽  
Germination Speed ◽  
Different Temperatures ◽  
Effects Of Temperature

Abstract: Antioxidant enzyme activity can be used to measure heat stress and predict the tolerance of a species to heat stress. This study investigated the effects of temperature on germination and antioxidant enzyme activity in Dalbergia spruceana Benth. seeds. Seeds were incubated at constant temperatures of 20, 25, 30, 35, and 40 °C for ten days; and germination percentage, germination speed index, antioxidant enzyme activity, and electrical conductivity were evaluated. Temperature affected the seed germination process but not antioxidant enzyme activity. Germination percentage and germination speed index were higher at 25 and 35 °C and lower at 20 and 40 °C. Superoxide dismutase activity was not affected by temperature. Catalase and peroxidase activities were too low to be used as indicators of temperature stress. The pattern of increasing electrolyte leakage manifested a trend toward loss of cell membrane semipermeability at higher temperatures.

Antioxidant Enzyme Levels Inversely Covary with Hearing Loss After Amikacin Treatment

2003 ◽  
Vol 14 (03) ◽  
pp. 134-143 ◽  
Author(s):  
James J. Klemens ◽  
Robert P. Meech ◽  
Larry F. Hughes ◽  
Satu Somani ◽  
Kathleen C.M. Campbell
Keyword(s):  
Hearing Loss ◽  
Enzyme Activity ◽  
Antioxidant Enzyme ◽  
Guinea Pigs ◽  
Auditory Brainstem ◽  
Antioxidant Enzyme Activity ◽  
Control Group ◽  
Glutathione S Transferase ◽  
Brainstem Response ◽  
The Difference

This study's purpose was to determine if a correlation exists between cochlear antioxidant activity changes and auditory function after induction of aminoglycoside (AG) ototoxicity. Two groups of five 250-350 g albino guinea pigs served as subjects. For 28 days, albino guinea pigs were administered either 200 mg/kg/day amikacin, or saline subcutaneously. Auditory brainstem response testing was performed prior to the first injection and again before sacrifice, 28 days later. Cochleae were harvested and superoxide dismutase, catalase, glutathione peroxidase, glutathione-S-transferase, glutathione reductase activities and malondialdehyde levels were measured. All antioxidant enzymes had significantly lower activity in the amikacin group (p ≤ 0.05) than in the control group. The difference in cochlear antioxidant enzyme activity between groups inversely correlated significantly with the change in ABR thresholds. The greatest correlation was for the high frequencies, which are most affected by aminoglycosides. This study demonstrates that antioxidant enzyme activity and amikacin-induced hearing loss significantly covary.

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