| Cinnamomum burmannii is an Cinnamomum of Lauraceae. It is a new type of ornamental trees that have high ornamental value. For this excellent tree's further application, its cold, drought and water-logging were studied from the physiological aspect. The main results were as follows:(1) In water logging trial, iln the waterlogging stress conditions, with the stress time, leaf relative water content at first decreased and then increased, less further increase in the "S"-type changes.At the lowest value of 80 days. Leaf peroxidase activity and soluble sugar content and membrane permeability were increased and then decreased gradually at first, of which 120 days to reach peak. MDA content in leaves is to rapidly increase, and then slowly increased; free proline content also appears to be increased and then decreased, again and again minus the "S" type of change. Chlorophyll a, chlorophyll b, carotenoid and chlorophyll content decreased slowly at first, and then a sharp decline followed a slow decline. In dealing with the period (200 days) had no seedlings leaves off phenomenon, in dealing with the first 200 days after the seedlings are still growing well. And waterlogging treatment in the first 26 days long air roots Department began to take root, with the waterlogging stress time, the longer and more aerial roots. Cultured seedlings of the same age with normal than the seedlings to flooding stress through more yellow leaves, and stem height and seedling cultivation Dengjun smaller than normal. Yin Hong resulting annual waterlogging of seedlings with strong.(2) In drought experiment, with drought stress increasing, drought stress on seedlings of annual Cinnamomum burmannii significant physiological effects. With the intensification of drought stress, sustained and rapid decline in leaf relative water content, plasma membrane permeability and soluble sugar, soluble protein, free proline, malondialdehyde content and peroxidase activity changes first, followed by decreases.And, in the drought reached its peak on day 12, seedlings in the first 16 days all died. The results obtained from the annual seedling drought burmannii weak, the results can provide guidance for application of a reasonable garden.(3) In Frozen resistance experiment, as the temperature declined, he change of membrane permeability and the content of Soluble sugar, Free proline,MDA, Soluble protein are first increased and then decreased gradually.As Peroxidase activity is. And from control to-3℃is increasing,then began a sharp decline from-3℃. Cinnamomum burmannii leaf shows the low temperature capability of -3℃,Its cold resistance of plants belonging to weaker. But in this three-old (Cinnamomum burmannii annual seedlings, three seedlings and mature trees) seedlings of Cinnamomum burmannii, As the stress time, Membrane permeability and soluble sugars, free proline, malondialdehyde, soluble protein content of the tree, mature trees> seedlings three> annual seedlings. During the seedling, the young seedlings of some proof measures should be taken,such as stamp shade net and straw,that can effective heating for seedling cold to help them smoothly through the winter. The experimental research data for the promotion and application of Yin Hong to provide the scientific basis for.
|
PDF Full Text Request