منابع مشابه
Thermal limits of leaf metabolism across biomes.
High-temperature tolerance in plants is important in a warming world, with extreme heat waves predicted to increase in frequency and duration, potentially leading to lethal heating of leaves. Global patterns of high-temperature tolerance are documented in animals, but generally not in plants, limiting our ability to assess risks associated with climate warming. To assess whether there are globa...
متن کاملThe diurnal metabolism of leaf starch.
Starch is a primary product of photosynthesis in leaves. In most plants, a large fraction of the carbon assimilated during the day is stored transiently in the chloroplast as starch for use during the subsequent night. Photosynthetic partitioning into starch is finely regulated, and the amount of carbohydrate stored is dependent on the environmental conditions, particularly day length. This reg...
متن کاملOxalate metabolism by tobacco leaf discs.
The turnover rate of oxalate in leaf discs of Nicotiana tabacum, var Havana Seed, during photosynthesis was estimated to be 1 to 2 micromoles per gram fresh weight per hour. Radioactivity from the enzymic oxidation of [(14)C]oxalate rapidly appeared in neutral sugars (mainly sucrose), organic acids (mainly malate), and amino acids. Only 5% of the radioactivity was released to the atmosphere as ...
متن کاملPhotorespiratory glycine metabolism in corn leaf discs.
The total glycine pool in Zea mays L. Mo17xB73 leaf discs was measured after steady state photosynthesis in 50%, 21% and 1% O(2). The glycine pool was a function of O(2) concentration; it was largest in 50% O(2) and smallest in 1% O(2). Incubation of discs with methyl hydroxybutynoic acid in 21% O(2) in the light caused an accumulation of carbon in glycolate. This accumulation was O(2) sensitiv...
متن کاملMetabolomics Analysis of Cistus monspeliensis Leaf Extract on Energy Metabolism Activation in Human Intestinal Cells
Energy metabolism is a very important process to improve and maintain health from the point of view of physiology. It is well known that the intracellular ATP production is contributed to energy metabolism in cells. Cistus monspeliensis is widely used as tea, spices, and medical herb; however, it has not been focusing on the activation of energy metabolism. In this study, C. monspeliensis was i...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1973
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.52.1.17