drought is an important abiotic stress limiting plant performance. generation of reactive oxygen species (ros) is enhanced under stresses. two greenhouse experiments were conducted to evaluate the effect of phytohormones on the changes of antioxidant enzymes and carotenoids in petals of pot marigold (calendula officinalis l.) under drought stress. results showed that the activities of superoxid...

Stress exposure has been identified as one risk factor for alcohol abuse that may facilitate the transition from social or regulated use to the development of alcohol dependence. Preclinical studies have shown that dysregulation of the corticotropin releasing factor (CRF) neurotransmission has been implicated in stress-related psychopathologies such as depression and anxiety, and may affect alc...

Stomatal resistances and turgor pressures were measured during a 12-day period on leaves of bean (Phaseolus vulgaris L. cv. Contender) which were treated with kinetin, were salinized or were treated with kinetin and salinized. Stomatal resistances were highest in salt-stressed plants, and progressively lower in salt-stressed and kinetin-treated plants, control plants, and kinetin-treated plants...

This paper examines the acoustic correlates of accentual prominence in English spoken by L1 Bengali speakers. The acoustic phonetic correlates of stressed unaccented vowels, and stressed vowels produced in positions of narrow focus were compared. As observed for many varieties of English, the main correlates of accentual prominence in narrow focused contexts were presence of/and extent of f0 mo...

An Escherichia coli population harvested in exponential phase at about 10(8) cells/ml was treated in phosphate buffer with HOCl at concentrations ranging from 0.4 to 1 mg/liter (7.7 to 19 microM). The HOCl stress resulted in the appearance of three cell subpopulations: a majority of dead (nonrespiring) cells, a few culturable cells (10(2) to 10(4)), and about 10(7) viable but nonculturable cell...

The aim of the present study was to determine the effect of the histaminergic precursor L-histidine and the H3 receptor antagonist thioperamide on the learning process of zebrafish submitted or not to confinement stress. On each of the 5 consecutive days of experiment (D1, D2, D3, D4, D5), animals had to associate an interruption of the aquarium air supply with food offering. Non-stressed zebra...

Sugarcane stalks that were drought stressed and not stressed were sampled 50 days after applying Fusilade Super (fluazifop-butyl). The stalks were sectioned and analysed for structural (fibre) and soluble (brix) carbohydrates. Levels of sucrose, glucose and fructose were determined by HPLC. The data show that total stalk dry matter was not reduced by fluazifop-butyl, regardless of whether the c...

The growth and phosphate mobilization of control and salt-stressed sesame (Sesamum indicum L.) and pepper (Capsicum annuum L.) plants were examined to ascertain whether or not translocation limits growth of salt-stressed plants. Plants were grown in a complete nutrient solution with and without excess salt. One-half of the control and salt-stressed plants were later transferred to phosphate-fre...

Punarnavine (20 and 40 mg/kg) and fluoxetine (20 mg/kg) per se administered orally for 14 successive days significantly decreased immobility periods of both unstressed and stressed mice in forced swim test. These drugs also significantly decreased sucrose preference in both stressed and unstressed mice as compared to their respective controls, indicating significant antidepressant-like activity...

We investigated if the orally administered Lactobacillus pentosus strain S-PT84 (S-PT84) might show anti-stress activity and ameliorate stress-induced immune suppression in mice. Stress of mice induced an increase in serum corticosterone and a decrease in splenic natural killer activity and in the number of splenocytes versus control mice. However, these changes were not observed in stressed mi...