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한국생태학회 / v.21, no.1, 1998년, pp.89-96 
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칡(Pueraria thunbergiana) 조직수분관계의 일변화 특성
( The Characteristics of Diurnal Changes in the Tissue-Water Relations of Pueraria thunbergiana ) |
| 박용목;최창렬; 청주대학교 이공대학 생물학과;청주대학교 이공대학 생물학과;
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| 초 록 |
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| The diurnal changes of the stomatal conductance, transpiration and leaf water potential were measured in order to assess the water relations characteristics of Pueraria thunbergiana in August of 1995 and 1996. The results showed two different responses depending on the duration of rainless days. The microclimatic conditions were highly stressful on 2 August. Daily maximum temperature reached to $39.0{circ}C$ and vapor pressure deficit was 3.55 KPa. During this time the leaf water potential decreased to -1.02 MPa and a marked reduction of stomatal conductance was shown. However, on 15 August the stomatal conductance increased with increment of photon flux density, and transpiration was highly maintained during the day time. Minimum leaf water potential was only -0.47 MPa in spite of high transpiration rate. Furthermore, on 15 August reduced leaf water potential during the day time was recovered rapidly with decrease of photon flux density, whereas recovery of leaf water potential on 2 August was delayed. However, reduced leaf water potential on 2 August was recovered untile the next dawn. Osmotic potential at turgor loss point of Pueraria thunbergiana on 2, 3 and 15 August was -1.79, -1.70 and -1.60 MPa, respectively. The vapor pressure deficit is more contributive to the regulation of stomatal conductance than leaf water potential. |
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| 키워드 |
| Leaf water potential;Osmotic potential;Stomatal conductance;Transpiration;Vapor pressure deficit;Water relations characteristics; |
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The Korean Journal of Ecology / v.21, no.1, 1998년, pp.89-96
한국생태학회
ISSN : 1225-0317
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199811919962994)
언어 : 한국어 |
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| 논문 제공 : KISTI 한국과학기술정보연구원 |
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