Changes in polyphenols and in enzymes of phenolic metabolism during tomato leaf senescence

  • 79 Pages
  • 2.35 MB
  • English
Miami University , Oxford, Ohio
Flavonoids, Tomatoes, Plant physi
StatementMichael Joseph Muhitch
The Physical Object
Paginationvi, 79 leaves, typed :
ID Numbers
Open LibraryOL14532477M

Significant changes in pigment contents were, in most cases, correlated with changes in activities of the antioxidant enzymes. Modifications in superoxide dismutase and catalase isoform patterns were also observed during the progression of senescence. Both enzyme activities and isoenzyme patterns proved to be by: Polyphenols are a class of phytoalexins found in the tissues of a widespread range of plants.

As antioxidants, polyphenols are normally produced by plants for their antibiotic and antifungal properties. While there may be as many as 10, naturally occurring polyphenols, only a few plants containing an abundance of these compounds are common Cited by: Leaf senescence and activities of the antioxidant enzymes.

This article reviews biochemical changes during senescence in relation to reactive oxygen species and changes in antioxidant protection. N.J., Rothstein, S.J., Thompson, J.E.: Expression of nuclear and chloroplast photosynthesis-specific genes during leaf senescence.-Planta Cited by: Changes in element accumulation, phenolic metabolism, and antioxidative enzyme activities in the red-skin roots of Panax ginseng.

reactive oxidation system, antioxidant concentrations such as ascorbate and glutathione, activities of enzymes related to phenolic metabolism and oxidation, and antioxidative system particularly the ascorbate Cited by: 8.

Changes in enzyme activities (polyphenol oxidase and phenylalanine ammonia lyase) with type of tea leaf and during black tea manufacture and the effect of enzyme supplementation of dhool on black tea qualityCited by: Changes in the composition of phenylpropanoids and enzymes involved in their metabolism during potato tuber growth suggest varying nutritional values depending upon the developmental stage [ Oct 11,  · Many non-climacteric fruits like those of pea (Pisum sativum) do not exhibit those major changes during damage or altered redox poise in cells is a general slow-down of metabolism during storage.

enzymes from chloroplasts, mitochondria, and peroxisomes during leaf senescence of nodulated pea plants. Journal of Experimental Botany. Cited by: Developmental changes in antioxidant metabolites, enzymes, and pigments in fruit exocarp of four tomato (Lycopersicon esculentum Mill.) genotypes: β-carotene, high pigment-1, ripening inhibitor.

Changes in element accumulation, phenolic metabolism, and antioxidative enzyme activities in the red-skin roots of Panax ginseng Ying Zhou, Zhenming Yang, Lingling Gao, Wen Liu, Rongkun Liu, Junting Zhao, Jiangfeng You* Laboratory of Soil and Plant Molecular Genetics, College of Plant Science, Jilin University, Changchun, China article info.

The antioxidants content changes during development and during senescence many biochemical systems and molecular mechanisms are activated to counteract the increase of reactive oxygen species and free radicals.

There is a tight correlation between antioxidants and senescence processes and this aspect is detailed and appropriately by: decrease ofthe Chl content during senescence (Fig.

Peroxidase. Figure 6 shows the changes in the peroxidase activity during detached leaf senescence and the effect ofbenz-imidazole and kinetin. Peroxidase activity increased up to 2 days after which the increase was quite slow.

Kinetin and benzimidazole at the concentrations knownto delay Cited by: Leaf senescence and activities of the antioxidant enzymes Biochemical changes during senescence Lipids: One of the most characteristic features of senescence is the initiation of membrane leakiness and a consequent loss of intracellular compartmentalization.

Mar 01,  · The enzyme polyphenol oxidase (PPO) catalyzes the oxidation of phenolic compounds into highly reactive quinones. Polymerization of PPO-derived quinones causes the postharvest browning of cut or bruised fruit, but the native physiological functions of PPOs in undamaged, intact plant cells are not well understood.

Description Changes in polyphenols and in enzymes of phenolic metabolism during tomato leaf senescence EPUB

Walnut (Juglans regia) produces a rich array of phenolic compounds and. Cite this paper: Heidar Ali Malmir, The Changes in Phenolic and Flavonoids Compound Related to the Harvest Times and Enzyme Activity during Stages of Leaves Development in Juglans Regia L, International Journal of Agriculture and Forestry, Vol.

4 No. 4,pp. doi: / The suppressing effects of polyphenols on different cancers, and the miraculous effects of olive polyphenols in Mediterranean diet, and on the other hand, the occurrence of breast cancer at younger ages in Iranian women with its high death rate, led us to studying the effects of olive leaf polyphenols on breast cancer. by: 9. Apr 18,  · Fruit Polyphenols and Their Effects on Neuronal Signaling and Behavior in Senescence. Authors. JAMES A. JOSEPH, USDA-HNRCA at Tufts University, Boston, MassachusettsUSA Vitamins and Polyphenols, Critical Reviews in Food Science and Updated Knowledge about Polyphenols: Functions, Bioavailability, Metabolism, and Health, Critical.

Feb 01,  · Changes in activities of antioxidant enzymes and lipoxygenase during growth of sunflower seedlings from seeds of different vigour - Volume 12 Issue 1 - Christophe Bailly, Renata Bogatek-Leszczynska, Daniel Côme, Françoise CorbineauCited by: Enzymatic determination of Catechol oxidase and Protease from fruits (orange, apple) and vegetables (carrot, tomato) These copper-containing enzymes oxidize the phenolic groups to reactive oxygen In several key stages of plant development such as during germination of seeds and during leaf senescence, storage and other proteins are.

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Oct 11,  · Many non-climacteric fruits like those of pea (Pisum sativum) do not exhibit those major changes during maturation, and hence the conclusion drawn from the above studies that there is an oxidative process needs to be assessed.

The study of antioxidants in fruits is Cited by: Seasonal changes in antioxidant enzymes, polyphenol oxidase enzyme, flavonoids and phenolic content in three leafy liverworts Shivani Thakur and Sunita Kapila S. Thakur and S. Kapila ([email protected]), Dept of Botany, Panjab Univ., Chandigarh, India Seasonal changes in the total phenolic content, flavonoid content, specific activity of.

enzymes found in plants, fungi, bacteria, and animals.

Details Changes in polyphenols and in enzymes of phenolic metabolism during tomato leaf senescence FB2

In plants, these enzymes are usually found in the chloroplasts, although they can be released from this compartment during ripening or senescence. The enzymes contain copper at their active site. This metal ion.

Plant Polyphenols as Antioxidants Influencing the Human Health Sanda Vladimir-Kne evi þ, Biljana Bla ekovi þ, classification and distribution of plant polyphenols Phenolic compounds are ubiquitous in the plant species but their distribution at the plant metabolism and the amount of phenolic compounds can be observed under different.

Antioxidative effect: consumption of lycopene (rich in tomato, spinach, etc.) significantly ↑ antioxidant enzymes SOD, GSH-Px, GR, and GSH and ↓ levels of MDA in hypertensive patients.

Lycopene ↓ MDA levels and ↑ GSH levels in postmenopausal women and protects from cardiovascular disorder. Enzyme Assisted Extraction of Polyphenols from the Old Tea Leaves Hai TC1, Nam ND1, Hong Anh LT1, Vu TA2 and Man PV*3 1Ho Chi Minh City University of Food Industry, Vietnam 2Faculty of chemistry and food technology, Ba Ria Vung Tau University, Vietnam 3Faculty of Agro and food technology, Suranaree University, Thailand.

Lipids store and provide energy, provide insulation, help manufacture steroids and bile, and play a key role in transporting fat soluble nutrients in the blood. Determination of Catechins and Phenolic Acids in Red Wine by Solid Phase Extraction and HPLC Monica Dolci, Thermo Fisher Scientific, Runcorn, Cheshire, UK Introduction Dietary polyphenols comprise a wide range of aromatic compounds that are responsible for numerous organoleptic characteristics of plant-derived food and beverages.

86 oxidative stress on erythrocyte level, during D-gal induced senescence. 87 From all mentioned above, the aim of this study was to investigate the relationship between the ratio of activities of the antioxidant enzymes R = SOD/(GPx+CAT)88 and the 89 levels of UA and MDA in erythrocytes of D-gal treated rats.

90 91 Material and methods In this study, changes in the activities of polyphenol oxidase (PPO) and peroxidase (POD) as well as in the levels of soluble protein, soluble sugar, and ascorbic acid during development and ripening stages of medlar fruits were investigated. During the early stages of medlar fruits develop.

Heme oxygenase-1 is involved in the cytokinin-induced alleviation of senescence in detached wheat leaves during dark incubation. Journal of Plant Physiology, (8): – Kan, J., H.M.

Wang and C.H. Jin, Changes of reactive oxygen species and related enzymes in. Oct 01,  · This knowledge was used to adopt a transgenic approach generating tomato transformants in which sequences encoding key biosynthetic enzymes, either alone or in combination, or encoding regulatory elements are ectopically expressed.

These approaches resulted in a number of modified tomato lines with increased levels of by:. Polyphenolic extracts from the edible part of artichoke (Cynara scolymus L.) have been shown to be potential chemopreventive and anticancer dietary compounds.

High doses of polyphenolic extracts (AEs) induce apoptosis and decrease the invasive potential of the human breast cancer cell line, MDA-MB However, the molecular mechanism underlying AEs antiproliferative effects is not completely Cited by: Endogenous melatonin concentrations increased gradually in parallel with development toward leaf senescence in Arabidopsis.

In contrast, the melatonin content decreased during leaf development in this study. The reason for this discrepancy is not clear, but may Author: Hui Xia, Yanqiu Shen, Tian Shen, Xin Wang, Xuefeng Zhang, Peng Hu, Dong Liang, Lijin Lin, Honghong D.The aim of the present work was to analyze the changes in the activity of metabolic and antioxidant enzymes, as well as in the content of total soluble sugars, tocopherols, and total phenolic compounds in field-grown pepper plants (Capsicum annuum L.) under the influence of phytoplasma infection.

The activities of benzidine peroxidase (BPO) and Cited by: 1.