The effects of cyanide and ethylene, respectively, were studied on the respiration of a fully cyanide-sensitive tissue-the fresh pea, a slightly cyanide-sensitive tissue-the germinating pea seedling, and a cyanide-insensitive tissue-the cherimoya fruit. Cyanide inhibition of both fresh pea and pea seedling respiration was attended by a conventional Pasteur effect where fermentation was enhanced with an accumulation of lactate and ethanol and a change in the level of glycolytic intermediates indicative of the activation of phosphofructokinase and pyruvate kinase accompanied by a sharp decline in ATP level. In these tissues, ethylene had little or no effect on the respiration rate, or on the level of glycolytic intermediates or ATP. By contrast, ethylene as well as cyanide enhanced both respiration and aerobic glycolysis in cherimoya fruits with no buildup of lactate and ethanol and with an increase in the level of ATP. The data support the proposition that for ethylene to stimulate respiration the capacity for cyanide-resistant respiration must be present.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC542177 | PMC |
| http://dx.doi.org/10.1104/pp.58.1.47 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Laetrile, known as vitamin B17, is often used interchangeably with amygdalin. Laetrile is a semi-synthesis product of amygdalin, whereas amygdalin is a naturally occurring substance in many plants. Both compounds have a nitrile functional group that, when activated by the intestinal enzyme β-glucosidases, releases hydrogen cyanide.
View Article and Find Full Text PDFThe role of homogenization cycles and Poloxamer 188 on the quality of mitochondria isolated for use in mitochondrial transplantation therapy.
Sci Rep
January 2025
Laboratory for Critical Care Physiology, Feinstein Institutes for Medical Research, Northwell Health, Manhasset, NY, USA.
Mitochondrial transplantation (MTx) offers a promising therapeutic approach to mitigate mitochondrial dysfunction in conditions such as ischemia-reperfusion (IR) injury. The quality and viability of donor mitochondria are critical to MTx success, necessitating the optimization of isolation protocols. This study aimed to assess a rapid mitochondrial isolation method, examine the relationship between mitochondrial size and membrane potential, and evaluate the potential benefits of Poloxamer 188 (P-188) in improving mitochondrial quality during the isolation process.
View Article and Find Full Text PDFProduction of instant cassava () tuber flour for : optimization of process conditions.
J Food Sci Technol
February 2025
Department of Biochemistry, Faculty of Science, University of Dschang, Dschang, Cameroon.
Unlabelled: Production of instant cassava tuber flour for is an appealing process because of a significant reduction in cooking time, it involves less tedious preparation, the flour has improved odor with a significant increase in shelf life, and is of better quality. However, the optimum cassava fermentation and precooking parameters; two critical unit operations in the process, as well as their effects on the quality and shelf life of the product have not been studied elaborately. The Doehlert design was employed to optimize the fermentation and the precooking processes of cassava () tuber to produce instant flour for .
View Article and Find Full Text PDFExogenous SNP Alleviates Drought Stress in Wheat During the Grain-Filling Stage by Modulating Gene Transcription.
Int J Mol Sci
January 2025
College of Life Sciences, Henan Agricultural University, Zhengzhou 450046, China.
Drought stress severely damages wheat growth and photosynthesis, and plants at the grain-filling stage are the most sensitive to drought throughout the entire period of development. Exogenous spraying of sodium nitroprusside (SNP) can alleviate the damage to wheat caused by drought stress, but the mechanism regulating the proline pathway remains unknown. Two wheat cultivars, drought-sensitive Zhoumai 18 and drought-tolerant Zhengmai 1860, were used as materials when the plants were cultivated to the grain-filling stage.
View Article and Find Full Text PDFNeutrophil-macrophage hybrid membrane-coated prussian blue nanozyme for ulcerative colitis treatment and mechanistic insights.
J Nanobiotechnology
January 2025
Department of Gastroenterology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, P.R. China.
Background: Ulcerative colitis (UC) is a chronic and recurrent digestive tract disease that can lead to significant morbidity and mortality. The pathogenesis of UC is intricately associated with the presence of reactive oxygen species (ROS). Prussian blue (PB), an inorganic nanozyme with potent antioxidant properties, has been extensively applied in the treatment of various inflammatory conditions and tumors.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!