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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2020.2
- 수록면
- 1 - 8 (8page)
- DOI
- 10.7783/KJMCS.2020.28.1.1
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초록· 키워드
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Background: This study was conducted to investigate the effects of NaCl concentration on the photosynthetic parameters, chlorophyll fluorescence and growth characteristics of Crepidiastrum sonchifolium.
Methods and Results: As treatments, we subjected C. sonchifolium plants to four different concentrations of NaCl (0, 50, 100 and 200 mM). We found that the photosynthetic parameters maximum photosynthesis rate (P<SUB>N max</SUB>), net apparent quantum yield (Φ), maximum carboxylation rate (V<SUB>cmax</SUB>), and maximum electron transport rate (Jmax) were significantly reduced at an NaCl concentration greater than 100 mM. In contrast, there was an increase in water-use efficiency with increasing NaCl concentration, although in terms of growth performances, leaf dry weight, root dry weight, stem length, and total dry weight all decreased with increasing NaCl concentration. Furthermore, leakage of electrolytes, as a consequence of cell membrane damage, clearly increased in response to an increase in NaCl concentration. Analysis of the polyphasic elevation of chlorophyll a fluorescence transients (OKJIP) revealed marked decrease in flux ratios (ΦPO, ΨO and ΦEO) and the PI<SUB>abs</SUB>, performance index in response to treatment with 200 mM NaCl, thereby reflectings the relatively reduced state of photosystem II. This increase in fluorescence could be due to a reduction in electron transport beyond Q<SUP>−</SUP><SUB>A</SUB> . We thus found that the photosynthetic parameters, chlorophyll fluorescence and growth characteristics of C. sonchifolium significantly increased in response to treatment with 200 mM NaCl.
Conclusions: Collectively, the findings of this study indicate that C. sonchifolium shows relatively low sensitivity to NaCl stress, although photosynthetic activity was markedly reduced in plants exposed to 200 mM NaCl.
Methods and Results: As treatments, we subjected C. sonchifolium plants to four different concentrations of NaCl (0, 50, 100 and 200 mM). We found that the photosynthetic parameters maximum photosynthesis rate (P<SUB>N max</SUB>), net apparent quantum yield (Φ), maximum carboxylation rate (V<SUB>cmax</SUB>), and maximum electron transport rate (Jmax) were significantly reduced at an NaCl concentration greater than 100 mM. In contrast, there was an increase in water-use efficiency with increasing NaCl concentration, although in terms of growth performances, leaf dry weight, root dry weight, stem length, and total dry weight all decreased with increasing NaCl concentration. Furthermore, leakage of electrolytes, as a consequence of cell membrane damage, clearly increased in response to an increase in NaCl concentration. Analysis of the polyphasic elevation of chlorophyll a fluorescence transients (OKJIP) revealed marked decrease in flux ratios (ΦPO, ΨO and ΦEO) and the PI<SUB>abs</SUB>, performance index in response to treatment with 200 mM NaCl, thereby reflectings the relatively reduced state of photosystem II. This increase in fluorescence could be due to a reduction in electron transport beyond Q<SUP>−</SUP><SUB>A</SUB> . We thus found that the photosynthetic parameters, chlorophyll fluorescence and growth characteristics of C. sonchifolium significantly increased in response to treatment with 200 mM NaCl.
Conclusions: Collectively, the findings of this study indicate that C. sonchifolium shows relatively low sensitivity to NaCl stress, although photosynthetic activity was markedly reduced in plants exposed to 200 mM NaCl.
목차
ABSTRACT
서언
재료 및 방법
결과 및 고찰
REFERENCES
참고문헌 (41)
참고문헌 신청
Ashraf M / 1994 / Growth and ion distribution in salt stressed Melilotus indica(L. )ALL. and Medicago sativa L / Flora 189:207~213
Bae SJ / 1997 / Effects of Godulbaegi(Ixeris sonchifolia H. )diet on enzyme activities of CCl4 induced hepatotoxicity in rats / Korean Journal of Nutrition 30:19~24
배정진 / 2003 / 염분 환경하에서 종 콩과식물의 생장 아미노산 및 질소함량에 미치는 질소원의 영향 / Journal of Ecology and Environment 26(3):8~142
Blum A / 1981 / Cell membrane stability as a measure of drought and heat tolerance in wheat / Crop Science 21:43~47
Cho JW / 1999 / Growth characteristics and photosynthesis of soybean seedling to NaCl stress in sand culture / Korean Journal of Environmental Agriculture 18:361~365
Bae SJ / 1997 / Effects of Godulbaegi(Ixeris sonchifolia H. )diet on enzyme activities of CCl4 induced hepatotoxicity in rats / Korean Journal of Nutrition 30:19~24
배정진 / 2003 / 염분 환경하에서 종 콩과식물의 생장 아미노산 및 질소함량에 미치는 질소원의 영향 / Journal of Ecology and Environment 26(3):8~142
Blum A / 1981 / Cell membrane stability as a measure of drought and heat tolerance in wheat / Crop Science 21:43~47
Cho JW / 1999 / Growth characteristics and photosynthesis of soybean seedling to NaCl stress in sand culture / Korean Journal of Environmental Agriculture 18:361~365
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UCI(KEPA) : I410-ECN-0101-2020-480-000475349