Journal ArticleDOI
Developmental Changes in Flavonoids and Enzyme Activities of Primary Leaves from Field-Grown Barley
Denise E. Blume,Jerry W. McClure +1 more
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TLDR
The results are discussed in terms of the balance of biosynthesis and degradation of flavonoids in the primary leaf throughout its development from juvenile to senescent stages under field conditions.About:
This article is published in Zeitschrift für Pflanzenphysiologie.The article was published on 1979-11-01. It has received 16 citations till now. The article focuses on the topics: Saponarin & Isovitexin.read more
Citations
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Journal ArticleDOI
Optically assessed contents of leaf polyphenolics and chlorophyll as indicators of nitrogen deficiency in wheat (Triticum aestivum L.)
A. Cartelat,Zoran G. Cerovic,Yves Goulas,Sylvie Meyer,C. Lelarge,J.-L. Prioul,Aude Barbottin,Marie-Hélène Jeuffroy,Philippe Gate,Giovanni Agati,I. Moya +10 more
TL;DR: The use of the simple Chl/Phen ratio as an indicator of leaf N content at the canopy level would alleviate the problem of gradients along leaves, and would even accentuate the differences among levels of crop N deficiencies because of the Chl and Phen inverse dependence on the crop N nutrition status.
Journal ArticleDOI
The use of chlorophyll fluorescence excitation spectra for the non‐destructive in situ assessment of UV‐absorbing compounds in leaves
TL;DR: It was demonstrated that the concentration but not the classes of compounds present in the epidermis that are responsible for UV-screening is affected by the side and the age of the leaves, and that the logFER in the UV is independent of the emission wavelength.
Journal ArticleDOI
Effects of UV‐B on flavonoids, ferulic acid, growth and photosynthesis in barley primary leaves
TL;DR: Barley was grown with UV-B at levels simulating 25 nr 5% ozone depletion on the date of the summer solstice al 40°N latitude, withUV-A (320–400 nm), or with no supplemental irradiation to determine developmental changes in flavonoid accumulation, and glasshouse conditions proved too variable for reproducible determination of growth and photosynthesis.
Journal ArticleDOI
UV-excited chlorophyll fluorescence as a tool for the assessment of UV-protection by the epidermis of plants.
TL;DR: It is concluded that the new method may provide a valuable tool for the investigation of the acclimation of plants to UV-B radiation and, when accompanied by HPLC analysis, of the reaction of phenolic metabolism to environmental stimuli.
Journal ArticleDOI
Uvb radiation induced increase in quercetin : kaempferol ratio in wild-type and transgenic lines of petunia
Ken G. Ryan,Kenneth R. Markham,Stephen J. Bloor,J. Marie Bradley,Kevin A. Mitchell,Brian R. Jordan +5 more
TL;DR: The AFLS transgenic, contrary to expectations based on its genetic construction, had normal levels of flavonols in the leaves and the highest Q:K ratio of the three cultivars, which may indicate an enhanced protective role for quercetin.
References
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Journal ArticleDOI
Crystalline inorganic pyrophosphatase isolated from baker's yeast.
TL;DR: The method of isolation of the crystalline enzyme, a protein of the albumin type with an isoelectric point near pH 4.8, and the rate of the enzymatic hydrolysis of inorganic pyrophosphate is a function of pH, temperature, concentration of substrate, and concentration of activating ion are given.
Book ChapterDOI
Physiology and Functions of Flavonoids
TL;DR: This chapter is concerned with physiological factors that control levels of flavonoids accumulating in plants and with the biological implications of these accumulations both within the plant and in plant-animal (1ncluding man) interactions.
Journal ArticleDOI
Development of Microbodies in Sunflower Cotyledons and Castor Bean Endosperm during Germination.
TL;DR: In cotyledons of sunflower seedlings glyoxysomal and peroxisomal enzymes exhibit different rates of development during germination, and it is proposed that malate and aspartate may be involved in hydrogen transport between microbodies and other cellular sites.
Journal ArticleDOI
Purification and Kinetic Properties of Chalcone-Flavanone Isomerase from Soya Bean
Michael J. Boland,Edmon Wong +1 more
TL;DR: The chalcone-flavanone isomerase from soya bean seed has been purified 8300-fold and a number of flavonoid compounds competitively inhibit the reaction, suggesting a possible regulatory role for this enzyme in flavonoids biosynthesis.
Related Papers (5)
Effects of UV‐B on flavonoids, ferulic acid, growth and photosynthesis in barley primary leaves
Peroxidase Isoenzymes and Leaf Senescence in Sunflower, Helianthus annuus L
Philip Hazell,David R. Murray +1 more