scholarly journals The Action of Abscisic Acid on Ion Uptake and Water Flow in Plant Roots

1972 ◽  
Vol 25 (6) ◽  
pp. 1125 ◽  
Author(s):  
WJ Cram ◽  
MG Pitman
Keyword(s):  
Abscisic Acid ◽  
Water Flow ◽  
Ion Uptake ◽  
Plant Roots ◽  
Maximum Effect ◽  
Total Uptake ◽  
Maize Roots

Abscisic acid was shown to inhibit transport of potassium and chloride from the cut ends of excised barley and maize roots. Transport to the shoot of intact barley seedlings was also inhibited. Total uptake into the excised root of barley did not appear to be affected by abscisic acid. There was an increase in tracer accumulated in the root accompanying the reduction in transport from the cut end. Concentrations of abscisic acid above 10-6M produced the maximum effect.

scholarly journals p-Fluorophenylalanine-Induced Restriction of Ion Uptake and Assimilation by Maize Roots

1985 ◽  
Vol 77 (3) ◽  
pp. 718-721 ◽  
Author(s):  
M. A. Morgan ◽  
Richard J. Volk ◽  
William A. Jackson
Keyword(s):  
Ion Uptake ◽  
Maize Roots

scholarly journals Effect of Nematodes on Rhizosphere Colonization by Seed-Applied Bacteria

2004 ◽  
Vol 70 (8) ◽  
pp. 4666-4671 ◽  
Author(s):  
Oliver G. G. Knox ◽  
Ken Killham ◽  
Rebekka R. E. Artz ◽  
Chris Mullins ◽  
Michael Wilson
Keyword(s):  
Pseudomonas Fluorescens ◽  
Water Flow ◽  
Soil Biota ◽  
Plant Roots ◽  
Soil Nematodes ◽  
Passive Transport ◽  
Commercial Products ◽  
Rhizosphere Colonization ◽  
Physical Conditions ◽  
Bacterial Movement

ABSTRACT There is much interest in the use of seed-applied bacteria for biocontrol and biofertilization, and several commercial products are available. However, many attempts to use this strategy fail because the seed-applied bacteria do not colonize the rhizosphere. Mechanisms of rhizosphere colonization may involve active bacterial movement or passive transport by percolating water or plant roots. Transport by other soil biota is likely to occur, but this area has not been well studied. We hypothesized that interactions with soil nematodes may enhance colonization. To test this hypothesis, a series of microcosm experiments was carried out using two contrasting soils maintained under well-defined physical conditions where transport by mass water flow could not occur. Seed-applied Pseudomonas fluorescens SBW25 was capable of rhizosphere colonization at matric potentials of −10 and −40 kPa in soil without nematodes, but colonization levels were substantially increased by the presence of nematodes. Our results suggest that nematodes can have an important role in rhizosphere colonization by bacteria in soil.

Modeling water flow in cropped soils: Water uptake by plant roots

1995 ◽  
Vol 21 (5) ◽  
pp. 705-709 ◽  
Author(s):  
T.C. Janz ◽  
R.J. Stonier
Keyword(s):  
Water Flow ◽  
Water Uptake ◽  
Plant Roots

Benzimidazole Enhancement of Ion Uptake by Plant Roots

Science ◽  
1960 ◽  
Vol 131 (3397) ◽  
pp. 354-355 ◽  
Author(s):  
M. J. Klingensmith ◽  
A. G. Norman
Keyword(s):  
Ion Uptake ◽  
Plant Roots
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