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한국생물환경조절학회 / v.15, no.1, 2006년, pp.100-106 
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( Sorbitol-Facilitated Preconditioning Improves Desiccation Resistance of Douglas-fir and Western Hemlock Seedlings ) |
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| 초 록 |
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| A hypertonic solution of sorbitol was used to precondition Douglas-fir and Western hemlock plug seedlings to improve desiccation resistance. Seedlings were preconditioned by soaking their root balls in water, -0.75 or -1.50 MPa sorbitol solution for 22 hr, and then exposed to desiccation conditions for 8 days. During the desiccation period, a transpirational water loss was significantly reduced by the sorbitol preconditioning, with its effect positively depending on concentration. This preconditioning-induced reduction in water loss was mainly caused by the decline in needle stomatal conductance. Sorbitol-induced stomatal control was more closely associated with reduction in plant water potential, rather than increase in abscisic acid concentrations. After rehydration of stressed-plants, most of the preconditioned seedlings with sorbitol were survived, while only 35% of Douglas-fir and 28% of Western hemlock seedlings treated with water were alive. The post-growth was significantly greater in the preconditioned seedlings than only water-treated seedlings. These results suggested that the earlier stomatal control with sorbitol-facilitated preconditioning could play a role in improving desiccation resistance of evergreen woody plants at transplanting in the field where water supply is limited or dry conditions are prevailing. |
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| 키워드 |
| Pseudotsuga menziesii;Thuga heterophylla;abscisic acid;osmoticum;stomatal conductance;transpirational water loss ; |
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생물환경조절학회지 / v.15, no.1, 2006년, pp.100-106
한국생물환경조절학회
ISSN : 1229-4675
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200617033442712)
언어 : 영어 |
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| 논문 제공 : KISTI 한국과학기술정보연구원 |
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