Search
Now showing items 1-10 of 16
-
Nitrate induction and physiological responses of two maize lines differing in nitrogen use efficiency: effects on N availability, microbial diversity and enzyme activity in the rhizosphere
(SPRINGER, 2018)The rate of nitrate (NO3 (-)) uptake and changes in rhizosphere properties were studied growing seedlings of two maize inbred lines differing in nitrogen use efficiency (NUE) in rhizoboxes.Changes in NO3 (-) uptake rates ... -
Changes in plasma membrane H+-ATPase activity during aeration of maize roots
(1996)Plasma membrane-enriched vesicles were isolated by density gradient centrifugation from maize roots previously submersed for 2 h with or without aeration in a 1 mmol/L CaSO4 solution, a condition which can modify the rate ... -
Effect of soil humic substances on surface redox activity of oat roots
(1995)The effect of a low molecular weight (<5kDa, LMW) and a high molecular weight (>5kDa, HMW) humic fractions on surface redox activities of oat roots was studied. Oxidation of the electron donor NADH and reduction of the ... -
Plasma Membrane H+-ATPase in Maize Roots Induced for NO3- Uptake
(1995)Plasma membrane H+-ATPase was studied in maize (Zea mays L.) roots induced for NO3- uptake. Membrane vesicles were isolated by means of Suc density gradient from roots exposed for 24 h either to 1.5 mM NO3- or 1.5 mM SO4-. ... -
Water-extractable humic substances enhance iron deficiency responses by Fe-deficient cucumber plants
(1999)The ability of Fe-deficient cucumber plants to use iron complexed to a water-extractable humic substances fraction (WEHS), was investigated. Seven-day-old Fe-deficient plants were transferred to a nutrient solution ... -
Solubilization of iron by water-extractable humic substances
(2000)The capability of water-extractable humic substances (WEHS) to solubilize Fe from sparingly soluble Fe-hydroxide was studied. Addition of WEHS (1.7 rnmol organic C I-1) to a dialysis tube containing labeled insoluble ... -
Uptake of Fe-59 from soluble Fe-59-humate complexes by cucumber and barley plants
(2002)The capability of cucumber (Cucumis sativus L., cv. Serpente cinese), a Strategy I plant and barley (Hordeum vulgaris L., cv. Europa), a Strategy II plant to use Fe complexed by a water-soluble humic fraction (WEHS) extracted ... -
Iron reduction in iron-stressed plants of Actinidia deliciosa genotypes: Involvement of PM Fe(III)-chelate reductase and H+-ATPase activity
(1999)Micropropagated plantlets of the Actinidia rootstock D1, resistant to lime-induced iron (Fe) deficiency, and the Actinidia deliciosa line 2084 (sel. 2084), moderately sensitive to Fe starvation, were grown in nutrient ... -
Uptake of iron (59Fe)complexed to water-extractable humic substances by sunflower leaves
(2003)A research was carried out to evaluate the leaves' ability to utilize Fe supplied as a complex with water-extractable humic substances (WEHS) and the long-distance transport of 59Fe applied to sections of fully expanded ...