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KMID : 0903619950360040548
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Journal of the Korean Society for Horticultural Science
1995 Volume.36 No. 4 p.548 ~ p.554
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Effects of Cultural System , Root Zone Temperature and Ionic Strength on Morphological and Anatomical Changes of chrysanthemum Root
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Abstract
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The present study was carried out to investigate the effects of environmental factors in root zone, in terms of cultural system, temperature and concentration of nutrient solution, on morphology and anatomy of the roots of chrysanthemum cv. Baekgwang. Root cap was observed only in soil-cultured plants but not in those grown by hydroponic systems. Number of nuclei in the cells was the highest in the plants grown by soil culture, followed by aeroponics and NFT. The intercellular space in the roots grown by NFT was larger than those grown by aeroponics and soil culture. Arrangement of epidermal cells was irregular and large in the plants grown by aeroponics. Plant roots grown by hydroponics tended to become thicker as the root zone temperature dropped. In the hydroponics the amounts of roots and root hair development tended to increase as the concentration of nutrient solution was lowered. The root tips exposed to excessive nutrient conditions ceased to grow and eventually died. The results indicate that the chrysanthemums is a plant that has a relatively wide range of adaptation to oxygen concentration in the root zone, plant growth in the aeroponic system can be impeded due to excessive disturbance of the root system, and that excessive nutritional condition tend to decrease root activity.
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