Ferenc Horváth

Learn More
The role of nitric oxide (NO) in photosynthesis is poorly understood as indicated by a number of studies in this field with often conflicting results. As various NO donors may be the primary source of discrepancies, the aim of this study was to apply a set of NO donors and its scavengers, and examine the effect of exogenous NO on photosynthetic electron(More)
Salicylic acid (SA) applied at 10(-3) m in hydroponic culture decreased stomatal conductance (g(s)), maximal CO(2) fixation rate (A(max) ) and initial slopes of the CO(2) (A/C(i)) and light response (A/PPFD) curves, carboxylation efficiency of Rubisco (CE) and photosynthetic quantum efficiency (Q), resulting in the death of tomato plants. However, plants(More)
Nitric oxide (NO) is one of the key elements in the complex signalling pathway leading to stomatal closure by inducing reversible protein phosphorylation and Ca(2+) release from intracellular stores. As photosynthesis in guard cells also contributes to stomatal function, the aim of this study was to explore the potential role of NO as a photosynthetic(More)
Pre-treatment with 10(-4)M salicylic acid (SA) in hydroponic culture medium provided protection against salinity stress in tomato plants (Solanum lycopersicum L. cv. Rio Fuego). The effect of 10(-7) or 10(-4)M SA on the water status of plants was examined in relation to the biosynthesis and accumulation of abscisic acid (ABA) in order to reveal the role of(More)
The Cumanians were originally Asian pastoral nomads who in the 13th century migrated to Hungary. We have examined mitochondrial DNA from members of the earliest Cumanian population in Hungary from two archeologically well-documented excavations and from 74 modern Hungarians from different rural locations in Hungary. Haplogroups were defined based on HVS I(More)
Sodium nitroprusside (SNP) is a widely used nitric oxide (NO) donor chemical, although it has been reported to release cyanide as well as NO during its photolysis. The aim of this work was to examine this potential side effect of SNP. Chlorophyll fluorescence experiments with pea leaves showed that SNP modifies photosynthetic electron transport. The(More)
The alleviation of oxidative damage and increased resistance to salt stress and to non-ionic osmotic stress induced by 100 mM NaCl or 100 mOsm polyethylene glycol (PEG) treatments, respectively, often correlate with a more efficient antioxidative defence systems and detoxification mechanisms. Pre-treatment of plants with salicylic acid (SA) enhanced(More)
The effects of increasing osmotic stress induced by 100–400 mOsm (−0.976 MPa) polyethylene glycol (PEG 6000) were investigated in a drought-tolerant (Triticum aestivum L. cv. Mv Emese) and drought-sensitive (cv. GK Élet) wheat cultivar at the three-leaf stage. During osmotic stress, the decline of the water potential (ψ w) was more significant in the(More)
A 60 year old hyperthyroid black woman with long-standing Graves' disease treated with methimazole presented with anasarca and congestive heart failure. She was found to have the nephrotic syndrome with a urinary protein excretion of 32 g/day. Light and electron microscopy revealed a stage II membranous glomerulopathy. Direct and indirect immunofluorescence(More)
Sedative effects of single and repeated doses of 50 mg and 150 mg tolperisone hydrochloride (Mydocalm), a centrally active muscle-relaxing agent, were evaluated in a placebo-controlled double-blind clinical trial. A total of 72 healthy young adults balanced by sex were randomized to receive 50 mg or 150 mg tolperisone hydrochloride or placebo t.i.d. for a(More)