Following the study on effects of different root temperature treatments on growth and stomata of tomato plants under high temperature in summer, the influence of different root temperature treatments on microstructure...Following the study on effects of different root temperature treatments on growth and stomata of tomato plants under high temperature in summer, the influence of different root temperature treatments on microstructure of tomato leaves was studied in depth in this paper. The tomato plants were cultured with circulating nutrient solutions. Under three different root temperature treatments [（23±1）, （28±1）, （33±1）℃], the microstructure of tomato leaves were observed and measured with paraffin section method. The results showed that with the increase of root temperature, the thickness, palisade tissue thickness, spongy tissue thickness of tomato leaves all decreased, but the epidermis thickness and palisade tissue thickness to spongy tissue thickness ratio increased. Therefore, increased root temperature led to drought stress to tomato plants, and in order to adapt to the hot and drought environment, tomato plants changed their structural characteristics.展开更多
This study attempts to examine the effects of salinity on leaf, stem, and nut of Pistacia vera （Ohady and Kaleh Ghochi cultivars） in order to characterize their anatomical structures with electron and light microsco...This study attempts to examine the effects of salinity on leaf, stem, and nut of Pistacia vera （Ohady and Kaleh Ghochi cultivars） in order to characterize their anatomical structures with electron and light microscopy. A comparative study of the anatomy indicates a difference between the density of simple and glandular trichomes in leaf surface, deposit of wax, the thickness of leaf, the length of epidermal cells, palisade parenchyma cells, crystals in mesophyll, and the manner of compatibility to salinity. The results obtained in this research demonstrate that compatibility of Ohady cultivar is higher than Kaleh Ghochi and the degree of mechanical wounding depends on their development stages. In addition to results of previous studies which considered crop load as the main cause of fruit deformity. The present study indicates that, in spite of some reduction in total production of a tree, salinity decreases fruit deformity and to a high extent prevents the production of deformed fruit. Indeed, a remarkable reduction in production of deformed fruit will be yielded by selecting pistachio varieties which are resistant to salinity. Moreover, salinity increases the resistance of nuts to mechanical wounding. The results of this study suggest that in EC = 7.6, 12.6 deformity of nut is not related to crop load.展开更多
文摘Following the study on effects of different root temperature treatments on growth and stomata of tomato plants under high temperature in summer, the influence of different root temperature treatments on microstructure of tomato leaves was studied in depth in this paper. The tomato plants were cultured with circulating nutrient solutions. Under three different root temperature treatments [（23±1）, （28±1）, （33±1）℃], the microstructure of tomato leaves were observed and measured with paraffin section method. The results showed that with the increase of root temperature, the thickness, palisade tissue thickness, spongy tissue thickness of tomato leaves all decreased, but the epidermis thickness and palisade tissue thickness to spongy tissue thickness ratio increased. Therefore, increased root temperature led to drought stress to tomato plants, and in order to adapt to the hot and drought environment, tomato plants changed their structural characteristics.
文摘This study attempts to examine the effects of salinity on leaf, stem, and nut of Pistacia vera （Ohady and Kaleh Ghochi cultivars） in order to characterize their anatomical structures with electron and light microscopy. A comparative study of the anatomy indicates a difference between the density of simple and glandular trichomes in leaf surface, deposit of wax, the thickness of leaf, the length of epidermal cells, palisade parenchyma cells, crystals in mesophyll, and the manner of compatibility to salinity. The results obtained in this research demonstrate that compatibility of Ohady cultivar is higher than Kaleh Ghochi and the degree of mechanical wounding depends on their development stages. In addition to results of previous studies which considered crop load as the main cause of fruit deformity. The present study indicates that, in spite of some reduction in total production of a tree, salinity decreases fruit deformity and to a high extent prevents the production of deformed fruit. Indeed, a remarkable reduction in production of deformed fruit will be yielded by selecting pistachio varieties which are resistant to salinity. Moreover, salinity increases the resistance of nuts to mechanical wounding. The results of this study suggest that in EC = 7.6, 12.6 deformity of nut is not related to crop load.
