7 resultados
Wheat (Triticum aestivum L.) plants were grown under four irradiance levels: 1,400, 400, 200, and 100 micromol m-2 s-1. Leaves and roots were sampled before, during, and after the boot stage, and levels of abscisic acid (ABA), indole-3-acetic acid (IAA), zeatin, zeatin riboside, dihydrozeatin,
An enzyme-linked immunosorbent assay (ELISA) which used 4-methylumbelliferyl phosphate as an enzyme substrate was used to quantify two plant cytokinins. This assay detected as little as 0.03 pmol (approximately 10 pg) of cytokinin in microplate wells coated with a cytokinin-ovalbumin conjugate. The
'Super Dwarf' wheat (Triticum aestivum L.) plants have been grown from seed to maturity in the Mir space station where they were periodically exposed, because of microgravity and other constraints, to water deficit, waterlogging, high CO2 levels, and low light intensities. The plants produced many
As part of the study of the possible role(s) of CBF-1, a cytokinin-binding protein abundant in wheat embryo, a cytokinin oxidase was found in wheat (Triticum aestivum L.) germ and partially purified by conventional purification techniques and high performance chromatofocusing. This preparation
Ammonium can result in toxicity symptoms in many plants when supplied as a sole nitrogen source. Nitrate reduces the negative effects caused by ammonium and promotes plant growth. In order to explore the mechanism responsible of this beneficial effect, we investigated whether nitrate application
As part of the study of cytokinin metabolic pathways, an enzyme, adenosine phosphorylase (EC 2.4.2.-), which catalyzed the ribosylation of N(6)-(Delta(2)-isopentenyl)adenine, N(6)-furfuryladenine, and adenine to form the corresponding nucleosides, was partially purified from wheat (Triticum
Two forms (F-I and F-II) of 5'-nucleotidases (5'-ribonucleotide phosphohydrolase, EC 3.1.3.5) which catalyze the dephosphorylation of N(6)-(Delta(2)-isopentenyl)adenosine 5'-monophosphate and AMP to form the corresponding nucleosides were partially purified from the cytosol of wheat (Triticum