scholarly journals High Temperature Injury of Ripening in Rice Plant VI. Enzyme activities of kernel as influenced by high temperature

1976 ◽  
Vol 45 (1) ◽  
pp. 162-167 ◽  
Author(s):  
Kengo INABA ◽  
Kanoe SATO
Keyword(s):  
High Temperature ◽  
Enzyme Activities ◽  
Rice Plant

High Temperature at Grain-filling Stage Affects Nitrogen Metabolism Enzyme Activities in Grains and Grain Nutritional Quality in Rice

Rice Science ◽  
2011 ◽  
Vol 18 (3) ◽  
pp. 210-216 ◽  
Author(s):  
Cheng-gang LIANG ◽  
Li-ping CHEN ◽  
Yan WANG ◽  
Jia LIU ◽  
Guang-li XU ◽  
...  
Keyword(s):  
High Temperature ◽  
Nitrogen Metabolism ◽  
Enzyme Activities ◽  
Nutritional Quality ◽  
Grain Filling ◽  
Filling Stage ◽  
Metabolism Enzyme ◽  
Grain Filling Stage

Degradation of naphthalene by thermophilic bacteria via a pathway, through protocatechuic acid

2008 ◽  
Vol 3 (1) ◽  
pp. 61-68 ◽  
Author(s):  
Audrius Bubinas ◽  
Gražina Giedraitytė ◽  
Lilija Kalėdienė ◽  
Ona Nivinskiene ◽  
Rita Butkiene
Keyword(s):  
High Temperature ◽  
Aromatic Ring ◽  
Aromatic Compounds ◽  
Enzyme Activities ◽  
Protocatechuic Acid ◽  
Culture Supernatant ◽  
Thermophilic Bacteria ◽  
Sole Source ◽  
Ring Fission

AbstractA number of thermophilic bacteria capable of utilizing naphthalene as a sole source of carbon were isolated from a high-temperature oilfield in Lithuania. These isolates were able to utilize several other aromatic compounds, such as anthracene, benzene, phenol, benzene-1, 3-diol, protocatechuic acid as well. Thermophilic isolate G27 ascribed to Geobacillus genus was found to have a high aromatic compound degrading capacity. Spectrophotometric determination of enzyme activities in cell-free extracts revealed that the last aromatic ring fission enzyme in naphthalene biotransformation by Geobacillus sp. G27 was inducible via protocatechuate 3, 4-dioxygenase; no protocatechuate 4, 5-dioxygenase, protocatechuate 2, 3-dioxygenase activities were detected. Intermediates such as o-phthalic and protocatechuic acids detected in culture supernatant confirmed that the metabolism of naphthalene by Geobacillus sp. G27 can proceed through protocatechuic acid via ortho-cleavage pathway and thus differs from the pathways known for mesophilic bacteria.

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>

Sign in / Sign up

Export Citation Format

Share Document