The effect of different periods of flooding stress on some of the Physiological parameters in peper (Capsicum annum L.) plant

Flooding stress affects many physiological and biochemical functions of plants، some of these changes are decrease in water and mineral absorption، growth rate and also changes in harmonic balance. Water logging has a major impact on both natural vegetation and agricultural crops. One of the important effects of flooding، include reducing of nutrient and water uptake in plants. Increase in root proteins in flooded plants could possibly the increase in some enzyme which induced during flooding. Result obtained sugar measurement showed that، sugar content in leaves and roots significantly decreased in comparison with control plant. Most probably because reduction in photosynthesis rate caused by closure of stomata in flooded plants. Measure of ethylene hormone showed that increased ethylene density in flooded plants leafs in comparison with control plant.