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7 resultats
Deliberate ROS production and auxin synergistically trigger the asymmetrical division generating the subsidiary cells in Zea mays stomatal complexes.
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Subsidiary cell generation in Poaceae is an outstanding example of local intercellular stimulation. An inductive stimulus emanates from the guard cell mother cells (GMCs) towards their laterally adjacent subsidiary cell mother cells (SMCs) and triggers the asymmetrical division of the latter.
Effect of menadione (vitamin K3) addition on lipid oxidation and tocopherols content in plant oils.
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The effect of added menadione (vitamin K3) on stored corn and wheat germ oil on the dissolution and dimerization of natural tocopherols and autoxidation of triacylglycerols was investigated. Samples of corn and wheat germ oils pure and with added menadione were stored at +20 degrees C in brown and
The 14 alpha-demethylation of obtusifoliol by a cytochrome P-450 monooxygenase from higher plants' microsomes.
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Microsomes isolated from corn embryos (Zea mays) can demethylate the 14 alpha-methyl group of obtusifoliol 2. An enzymatic assay has been developed for obtusifoliol 14 alpha-methyl-demethylase in higher plants. The enzymatic reaction was shown to occur sequentially, converting obtusifoliol 2 to 4
In vitro microspore selection in maize anther culture with oxidative-stress stimulators.
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In order to produce doubled-haploid maize plants tolerant of oxidative stress, in vitro microspore selection was carried out in anther culture with reactive oxygen species (ROS) progenitors such as paraquat, menadione, tert-butylhydroperoxide (t-BHP), and methionine combined with riboflavin. All the
Isolation and characterisation of two multidrug resistance associated protein genes from maize.
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Two genes encoding ATP-binding cassette (ABC) transporters were isolated from the crop plant Zea mays (maize). The clones, designated ZmMRP1 and ZmMRP2, were highly homologous to members of the multidrug resistance associated protein (MRP) subfamily. Genomic Southern analysis and characterisation of
Purification and Properties of Flavin- and Molybdenum-Containing Aldehyde Oxidase from Coleoptiles of Maize.
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Aldehyde oxidase (AO; EC 1.2.3.1) that could oxidize indole-3-acetaldehyde into indole-3-acetic acid was purified approximately 2000-fold from coleoptiles of 3-d-old maize (Zea mays L.) seedlings. The apparent molecular mass of the native enzyme was about 300 kD as estimated by gel-filtration column
Transgenic tobacco plants overexpressing polyamine oxidase are not able to cope with oxidative burst generated by abiotic factors.
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The molecular and biochemical mechanism(s) of polyamine (PA) action remain largely unknown. Transgenic tobacco plants overexpressing polyamine oxidase (PAO) from Zea mays exhibited dramatically increased expression levels of Mpao and high 1,3-diaminopropane (Dap) content. All fractions of spermidine
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