Controls on 22Na+ Influx in Corn Roots
نویسندگان
چکیده
منابع مشابه
Effect of ATPase inhibitors on cell potential and k influx in corn roots.
Experiments were performed to determine the effect of plasmalemma ATPase inhibitors on cell potentials (Psi) and K(+) ((86)Rb) influx of corn root tissue over a wide range of K(+) activity. N,N'Dicyclohexylcarbodiimide (DCCD), oligomycin, and diethylstilbestrol (DES) pretreatment greatly reduced active K(+) influx and depolarized Psi at low, but not at high, K(+) activity (K degrees ). More com...
متن کاملEnergy-linked Potassium Influx as Related to Cell Potential in Corn Roots.
Cell potentials and K(+) ((86)Rb) influx were determined for corn roots over a wide range of external K(+) activity (K degrees ) under control, anoxic, and uncoupled conditions. The data were analyzed using Goldman theory for the contribution of passive influx to total influx. For anoxic and uncoupled roots the K(+) influx shows the functional relationship with K degrees predicted with constant...
متن کاملDiagravitropism in corn roots.
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,...
متن کاملCalcium influx into corn roots as a result of cold shock.
Corn roots or washed corn root tissue exposed to cold shock absorb 20 to 24% more (45)Ca(2+) into a nonexchangeable phase than control roots. Addition to fusicoccin largely prevents this additional calcium influx. The results are discussed in relation to injury-induced changes in membrane permeability of root cell membranes.
متن کاملAsparagine synthetase in corn roots.
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. ...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1985
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.77.4.930