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논문 기본 정보

자료유형
학술저널
저자정보
Sarker, Bikash C. (United Graduate School of Agricultural Sciences, Iwate University) Hara, M. (United Graduate School of Agricultural Sciences, Iwate University, Laboratory of Agro-Environmental Sciences, Iwate University, Faculty of Agriculture) Uemura, M. (Division of Biosystem and Bioresource Technology, Cryobiosystem Research Center, Faculty of Agriculture, Iwate University)
저널정보
한국식물학회 식물학회지 식물학회지 제47권 제1호
발행연도
2004.1
수록면
33 - 41 (9page)

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Water relations, proline content and gas exchange of leaf were investigated under periodic water stress for two C3 plants (eggplant and tomato) in a greenhouse to study comparative adaptive responses. Although both species showed reduced water content of leaf and increased osmolality and proline content under low soil water potential, the recovery capacity after the stress was better in eggplant than tomato. Both species over-accumulated proline under low soil water potential and returned to its initial concentration during the recovery, indicating that proline may act as an osmoprotectant during drought. Proline was directly corresponding with osmolality during stress, and dehydration stress reduced the gas exchange parameters such as transpiration rate (ET), stomatal conductance (GS), and photosynthesis rate (Pn). At the final stage of the experiment both species showed 2.6 and 3.3 times lower Pn and 27 and 19 times lower GS for eggplant and tomato, respectively, as compared to control. But after stress was relieved by rewatering, both plants increased GS for 2 to 3 times and Pn for 4.5 times. Eggplant showed better water use efficiency (WUE) in relation to fruit production under the stress than tomato. Higher biomass allocation at root and fruit parts in eggplant indicated more efficient recovery than that of tomato. These findings inferred that both C3 plants developed internal complementary drought survival mechanism by lowering relative water content, increasing proline, and decreasing stomatal conductance but eggplants withstood the periodic droughting better than tomato, mainly due to its ability to recover from a water stress condition.

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