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자료유형
학술저널
저자정보
저널정보
한국원예학회 HORTICULTURE ENVIRONMENT and BIOTECHNOLOGY HORTICULTURE ENVIRONMENT and BIOTECHNOLOGY Vol.47 No.2
발행연도
2006.4
수록면
65 - 70 (6page)

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초록· 키워드

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Photosynthetic characteristics of ‘Campbell Early’ grapevine cultivar under flooding condition were examined with respect to gas exchanges and potential quantum yield (Fv/Fm). With increasing flooding duration, net co₂ assimilation rate (Aco₂), stomatal conductance (g<SUB>s</SUB>), and transpiration rate (E) decreased. Aco₂ of non-flooded plants in late June was 14.4 μ㏖ㆍm?²ㆍs?¹ at 1,000 μ㏖ㆍm?²ㆍs?¹ photosynthetic photon flux and maintained without any change for 3 days after flooding. At 7 and 14 days after flooding, however, the values significantly decreased to 78 and 58%, respectively, and were not readily recovered. gs and E were reduced in parallel with that of Aco₂, indicating that Aco₂ and E were greatly affected by g<SUB>s</SUB> in ‘Campbell Early’ grapevine cultivar. Flooding also decreased apparent quantum yield, light saturation point, and maximum co₂ assimilation rate, implying that photosystem Ⅱ (PSⅡ) was impaired. This observation was confirmed by the decreases of Fv/Fm values and chlorophyll contents. At 3 days after flooding, the Fv/Fm value in flooded plants was significantly lower than that in non-flooded plants. Chlorophyll contents also decreased continuously with increasing flooding duration and then the leaves visualized chlorosis. In conclusion, flooding decreased photosynthesis of ‘Campbell Early’ grapevine cultivar and ultimately injured PSII reaction center by closing stomata, reducing transpiration, and accumulating photosynthetic energy.

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Abstract
Introduction
Materials and Methods
Results and Discussion
Acknowledgment
Literature Cited

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