Plant Physiology Archive
The electron transport chain described above is shared in essentially the same form by virtually all organisms plants, animals and microorganisms. Plant mitochondria contain, in addition, several other redox enzymes, atleast two of which are unique to plants. These enzymes …
We noted earlier that one of the principal functions of the respiration is to retrieve, in useful form, some of the energy initially stored in assimilates. Our traditional measure of useful energy in most processes is the number of ATP …
The second stage of respiration is the complete oxidation of pyruvate to CO2 and water through a series of reactions known as the citric acid cycle (CAC). The citric acid cycle is also known as the tricarboxylic acid (TCA) cycle …
The first stage of respiratory carbon metabolism is a group of reactions by which hexose sugars undergo a partial oxidation to the three-carbon acid pyruvic acid or pyruvate. Occurrence: These reactions, collectively known as glycolysis, are catalyzed by enzymes located …
AN OVERVIEW OF PLANT RESPIRATION Aerobic (oxygen-requiring) respiration is common to nearly all eukaryotic organisms, and in its broad outlines, the respiratory process in plants is similar to that found in animals and lower eukaryotes. However, some specific aspects of …
A third mechanism for concentrating CO2 at the site of rubisco is found in crassulacean acid metabolism (CAM). Despite its name, CAM is not restricted to the family Crassulaceae (Crassula, Kalanchoe, Sedum); it is found in numerous angiosperm families. Cacti …
All plants do not follow the same Calvin cycle (C-3 pathway) in which first stable product of carbon fixation is PGA (3-C compound). In some plants the first stable product of carbon fixation is four carbon compound (malate). These plants …
Ihotorespiration (PR) is process that involves the reoxidation of products just previously assimilated in photosynthesis. The photorespiratory pathway involves the activities of at least three different cellular organelles (the chloroplast, the peroxisome, and the mitochondrion) and, because CO2 is evolved, …
It is light independent reaction because light is not directly required for processes but only the products of light reaction (ATP & NADPH2). During these processes carbon dioxide is converted into carbohydrates. It takes place in stroma of chloroplast …
Since the dawn of agriculture,man has waged war against weeds. Weeds compete with crop species for water, nutrients, and light and ultimately reduce crop yields. Traditionalmethodsofweedcontrol,suchascroprotation, manual hoeing, or tractor-drawn cultivators were largely replaced in the 1940s by labor-saving chemical …