13 rezultatus
Multiple contaminants can affect plant-microbial remediation processes because of their interactive effects on environmental behaviour, bioavailability and plant growth. Recent studies have suggested that arbuscular mycorrhizal fungi (AMF) can facilitate the revegetation of soils co-contaminated
A greenhouse pot experiment was conducted to investigate the effects of different concentrations of lanthanum (0 mg·kg-1, 50 mg·kg-1, 200 mg·kg-1 and 800 mg·kg-1) on growth, nutrient uptake, C:N:P stoichiometry, and La and Pb uptake by maize (Zea
OBJECTIVE
Plant growth responses to the rare earth elements lanthanum (La) and cerium (Ce) have been reported, but little is known about the effects of these two elements on plant mineral nutrition.
METHODS
Corn (Zea mays 'Hycorn 82') and mungbean (Vigna radiata 'Berken') were grown in continuous
A vibrating probe was used to measure the changes in ionic currents around gravistimulated roots of Zea mays L. in an effort to determine whether these currents are involved in stimulus transduction from the root cap to the elongation zone. We did not observe a migration of the previously reported
Short term (10 min) influx of (86)Rb-labeled potassium into corn (Zea mays L. WF9 x M14) root segments was inhibited by La (NO(3))(3) or LaCl(3). Half maximal inhibition of K(+) influx from 0.25 mm KCl was obtained with 0.025 mm La(3+). Kinetic analysis indicated the inhibition to be of a
The red light requirement for positive gravitropism in roots of corn (Zea mays cv "Merit") provides an entry for examining the participation of calcium in gravitropism. Applications of calcium chelators inhibit the light response. Calcium channel blockers (verapamil, lanthanum) can also inhibit the
The increasing occurrence of engineered nanoparticles (NPs) in soils may decrease water uptake in crops, followed by lower crop yield and quality. As one of the most common rare earth oxide NPs, lanthanum oxide (La2O3) NPs may inhibit the relative expressions of aquaporin
A greenhouse pot experiment was conducted to investigate the effects of arbuscular mycorrhizal (AM) fungi Claroideoglomus etunicatum (CE) and Rhizophagus intraradices (RI) on AM colonization rate, biomass, nutrient uptake, C:N:P stoichiometry, and the uptake and transport of lanthanum (La) and lead
The rate of auxin transport in sunflower hypocotyls (Helianthus annuus L. cv ;Russian mammoth') or corn coleoptiles (Zea mays L. cv ;WF9 x 38') was less in seedlings grown in Ca-deficient medium than in controls. The rate of IAA transport depended on the concentration of Ca in the root medium up to
Caffeine, (1:3:7-tri-methyl-xanthine), either as a prefixation treatment or included with glutaralde-hyde as the primary fixative, destroys or disorganises the microtubules associated with the formation of secondary walls in fibres from the flowering stem of the grass Lolium temulentum L. There is
Plant roots exude viscous polysaccharides, called mucilage. One of the suggested roles of mucilage is immobilization of toxic metal cations, including aluminum (Al), in the rhizosphere. Mucilage exuded from roots of Melastoma malabathricum (Al accumulator) was characterized in comparison with that
ATPase activity of the plasma membrane fraction from primary roots of corn (Zea mays L. WF9 x M14) was activated by Mg(2+) and further stimulated by monovalent cations (K(+) > Rb(+) > Cs(+) > Na(+) > Li(+)). K(+)-stimulated activity required Mg(2+) and was substrate-specific. Maximum ATPase activity
The aim of this study was to analyze whether di(2-ethylhexyl) phthalate (DEHP), a Sertoli and Leydig cell toxicant, is able to induce alterations in the expression of testicular gap and tight junction proteins. DEHP was administered by gavage (1 g/5 mL corn oil/kg body weight/day) to 25-day-old male