منابع مشابه
Hexokinase as a sugar sensor in higher plants.
The mechanisms by which higher plants recognize and respond to sugars are largely unknown. Here, we present evidence that the first enzyme in the hexose assimilation pathway, hexokinase (HXK), acts as a sensor for plant sugar responses. Transgenic Arabidopsis plants expressing antisense hexokinase (AtHXK) genes are sugar hyposensitive, whereas plants overexpressing AtHXK are sugar hypersensitiv...
متن کاملCytokinesis in Higher Plants
structure, the phragmoplast proper (Figure 1B). This *Department of Molecular, Cellular, structure subsequently shortens in length and expands and Developmental Biology in girth until it finally reaches the side wall (Figure 1C). University of Colorado During phragmoplast expansion there appears to be a Boulder, Colorado 80309–0347 shift in the organization of the MTs; whereas the initial † Dep...
متن کاملSelenium in Higher Plants.
Plants vary considerably in their physiological response to selenium (Se). Some plant species growing on seleniferous soils are Se tolerant and accumulate very high concentrations of Se (Se accumulators), but most plants are Se nonaccumulators and are Se-sensitive. This review summarizes knowledge of the physiology and biochemistry of both types of plants, particularly with regard to Se uptake ...
متن کاملHigher Plants
Contamination with 2,4,6-trinitrotoluene (TNT) is widespread at sites of past munitions manufacture. It is moderately toxic to plants and highly toxic to some animals. Some aquatic plant species have been observed to promote degradation of TNT. The degradative activity is associated with the root systems but products are found in the surrounding medium. We have examined a range of sixteen gener...
متن کاملIs hexokinase really a sugar sensor in plants?
The molecular mechanisms by which plant cells sense sugar levels are not understood, but current models (adapted from models for sugar sensing in yeast) favour hexokinase as the primary sugar sensor. However, the hypothesis that yeast hexokinase has a signalling function has not been supported by more recent studies and the idea that hexokinase is involved in sugar sensing in plants has yet to ...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1953
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(18)38447-3