Studies of the metabolism in vivo of proline and hydroxyproline and of the related pyrrolidonecarboxylic acid are not numerous. Many earlier redearches in which attempts were made to demonstrate relationships between these compounds and glutamic acid and ornithine are not convincing because of the fact that the rat growth procedure used at that time has now been shown to be inadequate. More rec...

BACKGROUND AND AIMS Global warming is gaining significance as a threat to natural and managed ecosystems since temperature is one of the major environmental factors affecting plant productivity. Hence, the effects of moderate temperature increase on the growth and development of the tomato plant (Lycopersicon esculentum) were investigated. METHODS Plants were grown at 32/26 degrees C as a mod...

Abstract The proposed spectral control of the adaptive metabolic responses to drought was tested by comparison two wheat genotypes with different stress tolerance. White light used as reference see effects three altered ratios blue, red, and far-red components, which conditions are referred pink, lights. Under all conditions, greatly reduced growth both genotypes. However, glutathione content d...

Water deficit stress is one of the chief abiotic stresses adversely affecting plant endurance leading serious effects on metabolism. Depending upon strength and duration water conditions, plants adjust a series physiological, cellular molecular mechanisms aiming correct response. Some responses to include decreased growth development hence decrease in fresh biomass, content chlorophyll rate pho...

In cell metabolism, substrate channeling is a phenomenon where the product of one reaction is transported to a second enzyme active site without equilibrating into bulk solvent. Chapter 1 reviews the rationale and evidence for substrate channeling with the specific example of proline metabolism. Oxidation of proline to glutamate is catalyzed in consecutive reactions by proline dehydrogenase (PR...