TY - JOUR
T1 - Abscisic acid in soils
T2 - What is its function and which factors and mechanisms influence its concentration?
AU - Hartung, W.
AU - Sauter, A.
AU - Turner, N. C.
AU - Fillery, I.
AU - Heilmeier, H.
PY - 1996
Y1 - 1996
N2 - Abscisic acid (ABA) was detected in aqueous extracts of a range of different soils, beneath a range of crops, pasture and forest species. Assuming that all the ABA is dissolved in the soil solution concentrations ranged from 0.6-2.8 nM. This is in the range which computer simulations predict is required in soils in order to prevent ABA release from the root hair zones of plant roots. The concentration of ABA in the soil solution was highest in acid soils and in soils with reduced moisture, and was lowest in moist, neutral and moderately alkaline soils. ABA in the soil solution of maize fields increased during the vegetative period. After incubation in soil for 72 h, radioactive ABA was degraded by 30-40%. Tetcyclacis, an inhibitor of the oxidative breakdown of ABA, completely prevented the degradation of ABA in the soil solution. Acid conditions and high salt concentrations significantly retarded ABA breakdown.
AB - Abscisic acid (ABA) was detected in aqueous extracts of a range of different soils, beneath a range of crops, pasture and forest species. Assuming that all the ABA is dissolved in the soil solution concentrations ranged from 0.6-2.8 nM. This is in the range which computer simulations predict is required in soils in order to prevent ABA release from the root hair zones of plant roots. The concentration of ABA in the soil solution was highest in acid soils and in soils with reduced moisture, and was lowest in moist, neutral and moderately alkaline soils. ABA in the soil solution of maize fields increased during the vegetative period. After incubation in soil for 72 h, radioactive ABA was degraded by 30-40%. Tetcyclacis, an inhibitor of the oxidative breakdown of ABA, completely prevented the degradation of ABA in the soil solution. Acid conditions and high salt concentrations significantly retarded ABA breakdown.
KW - abscisic acid
KW - rhizosphere
KW - roots
KW - soil
KW - stress
UR - http://www.scopus.com/inward/record.url?scp=0030301696&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0030301696
VL - 184
SP - 105
EP - 110
JO - Plant and Soil: An International Journal on Plant-Soil Relationships
JF - Plant and Soil: An International Journal on Plant-Soil Relationships
SN - 0032-079X
IS - 1
ER -