碩士 / 國立臺灣大學 / 森林學研究所 / 87 / To investigate appearance variation, after-draining survival possibility and sprouting ability of foliage under long- term flooding of sea water, on which the criteria of salinity- flooding tolerance are based, we select 8 kinds of common low- elevation greenery, having them waterlogged in solution of 4 kinds of density. To further understand their physiological interaction, so that what causes the damage reaction and what protects them from salt injuries may be found, out of the eight, two are chosen for short- term flooding simulation treatment.
According to my observation, the higher the solution''s density is, the sooner the damaged symptom in one- second of seedlings being tested appears, which is followed by salt- related decrease of parenchyma induced by flooding. Whereas some seedlings with lower- density salt water show more injured reactions and lower survival possibilities when time influence are considered. No matter being treated with 0.7﹪, 1.4﹪or 2.1﹪solution, one- second of seedlings of Terminalia catappa are always the last to have damaged symptom, which indicates the highest salt water tolerance potential; on the contrary, Koelreuteria henryi are the first to have that, and the most incompetent ones to resist salt water. For survival condition after draining, Koelreuteria henryi, Casuarina equisetifolia, Calophyllum inophyllum and Terminalia catappa are better, and Palaquium formosanum is worse. In terms of 0﹪salt water treatment, i. e. tap water, salt- water tolerance potential of Casuarina equisetifolia, Calophyllum inophyllum, Terminalia catappa and Pongamia pinnata is higher than that of Palaquium formosanum.
So far as the two selected kinds'' physiological reactions are concerned, Pongamia pinnata is much more a sort of salt- excluding plant than Palaquium formosanum. The evidence is: compared with the leaves, in the beginning, the density of Na+ and Cl- in roots of Pongamia pinnata is higher, but a couple days later, lower, while the density in roots and shoot of Palaquium formosanum has simultaneous remarkable increase, revealing its disability to expel salt ions.
The outward changes of the two may probably concern compartmentation of salt ions. Leaves of Pongamia pinnata have damaged symptom earlier, which could result from being unable to segregate salt ions into vacuole. But for Palaquium formosanum, the symptoms occur at the final stage of treatment. The latter''s roots and shoot might cushion some of the transmission of the ions to leaves and are more capable of compartmentation. However, when salt amount is over the compartmentation limit, the leaves wilt eventually.
| Identifer | oai:union.ndltd.org:TW/087NTU00360017 |
| Date | January 1999 |
| Creators | Chia-Yu Liu, 劉佳瑜 |
| Contributors | Shing-Rong Kuo, 郭幸榮 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 99 |
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