Metabolism of Corn Roots in Malonate
نویسندگان
چکیده
منابع مشابه
Metabolism of corn roots in malonate.
The rate of O(2) uptake by sub-apical corn roots is largely resistant to 0.1 m Na-malonate at pH 5.0. The resistance of this tissue, in which the tricarboxylic acid cycle is very active, is not due to the compensatory induction of another oxidative pathway as seems to be the case in fresh potato slices. In corn roots malonate inhibits succinate utilization as expected and the smallness of the e...
متن کاملBiosynthesis of malonate in roots of soybean seedlings.
Many plants accumulate malonate, but it was shown earlier that malonate does not accumulate as a deadend product of metabolism in soybean (Glycine max v. Hodgson tissues. The metabolism of malonate in the soybean plant at the whole tissue and enzymic level was followed, and the pathway of malonate biosynthesis in young soybean root tissue was shown to be via acetyl-coenzyme A carboxylase.
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The diagravitropic behavior of Merit corn (Zea mays L.) roots grown in darkness provides an opportunity for comparison of two qualitatively different gravitropic systems. As with positive gravitropism, diagravitropism is shown to require the presence of the root cap, have a similar time course for the onset of curvature, and a similar presentation time. In contrast with positive gravitropism,...
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The level of asparagine synthetase is low in 10-mm root tips from corn seedings (Zea mays W64 x W182F) but relatively high in mature root sections taken 20 to 35 mm from the tip. When root tips are excised there is a marked increase in asparagine synthetase over a 5-hour period. In mature root sections, on the other hand, the asparagine synthetase activity declines over the same 5-hour period. ...
متن کاملExocellular Enzymes of Corn Roots.
Little attention has been given to the occurrence of exocellular hydrolytic enzymes associated with the roots of higher plants. Such enzymes, if present, could solubilize macromolecular constituents of organic soils, permitting uptake and utilization by the plant of the resultant low molecular weight organic compounds. The present work supports this concept by demonstrating that several exocell...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1966
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.41.7.1135