摘要：The Solanaceae (or nightshades) is an economically important family of flowering plants. This family ranges from annual and perennial herbs to vines, lianas, epiphytes, shrubs and trees, and it includes a number of important agricultural crops, medicinal plants, spices, weeds and ornamentals. Potatoes, tomatoes eggplant, bell/ chilli peppers and tobacco are widely grown plants of this family. Food and Agriculture Organization stated that the irrigation needs to be more efficient in order to meet the water needs of the year, 2050. For this reason, it is important to develop new irrigation methods to prevent excessive water use. Deficit irrigation is one of these strategies that affect the yield in minimal and water-saving by increasing the efficiency in water use. Drought is one of the factors affecting photosynthesis and chlorophyll content. Previous studies have shown that leaf water potential, leaf relative water content and photosynthesis are affected by water stress in plants. Photosynthesis is directly related to chlorophyll fluorescence. Chlorophyll is a green molecule in plant cells which plays an important role in the photosynthesis process. It absorbs sunlight and uses its energy to synthesize carbohydrates from CO_2 and water. Due to the decrease in the leaf water content, chlorophyll synthesis rate is slow and chlorophyll degradation rate is increased. Chlorophyll a and b are the most important kinds of chlorophyll in plants. Chlorophyll fluorescence is a measure of the efficiency of photosynthesis and therefore, can be used as an indicator of vegetation health and vitality. Therefore, chlorophyll content is one of the important factors that should be examined to determine plant stress conditions. For this purpose, the aim of this study was to review the studies on the effect of water stress on the chlorophyll content of the plants of the Solanaceae family.
关键词：Chlorophyll;photosynthesis;Solanaceae;water deficit;water use efficiency
