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학술저널
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한국원예학회 HORTICULTURE ENVIRONMENT and BIOTECHNOLOGY HORTICULTURE ENVIRONMENT and BIOTECHNOLOGY Vol.50 No.3
발행연도
2009.6
수록면
262 - 266 (5page)

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In this study, we demonstrate physiological and biochemical differences in cucumber and figleaf gourd root system influenced by low temperature. Since cucumber plants are mostly cultivated in plastic house during winter time, maintaining optimal root function became crucial under such stressful condition, a reason why figleaf gourd is used as rootstock to enhance cucumber growth. In this review, we have attempted to summarize our work of over 20 years starting from photosynthesis, respiration and xylem sap transport. H?-ATPase activity of root plasma membrane of both species and its gene regulation were the next step in view of the importance of the activity maintaining cell pH and proton concentration gradient necessary to mediate water transport. Water transport protein located in plasma membrane and tonoplast seems to be a crucial factor controlling water status of the cell and plant as a whole. The fact that some of the aquaporin can transport H₂O₂, a final stable chemical out of reactive oxygen species in the cell, opens up the possibility that aquaporin may be involved in signal transduction pathway.

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Abstract
Introduction
Is the role of plasma membrane H?-ATPase activityof cucumber and figleaf gourd root justified in cold acclimation?
Can low temperature sensitivity be related with the ability of water uptake by the plants?
Aquaporin activity appears to act as a crucial factor controlling water relations in plants
Rapid accumulation of hydrogen peroxide in roots appears to mediate decrease in water transport
Conclusion
Acknowledgements
Literature Cited

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