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한국식물학회 / v.48, no.3, 2005년, pp.326-331 
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( Characterization of Photosynthetic Events and Associated Changes in Various Clones of Tea (Camellia sinensis L) under Low Temperature Conditions ) |
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| 초 록 |
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| Low temperature is one of the major environmental factors determining the growth rate of Camellia sinensis (L.), and photosynthesis is one major metabolic process commonly used as a tool for identifying low temperature stress effects on plants. The Fv/Fm values at 6:30 a.m. ($300-400mu mol m^{-2} s^{-1}$) did not vary much between the clones of tea plants. Further, when the light incidence increased at mid noon hours ($1700-1800mu mol m^{-2} s^{-1}$), the Fv/Fm values recorded a decline, irrespective of the clones. Of the 10 clones of tea plants under investigation, 3 clones, namely CRA-6017, TTL6 and SMP-l, recorded a sharp decrease in the Fv/Fm ratio by 2 p.m. The malondialdehyde (MDA) levels in all the clones increased from 9 a.m. ($1500-1700mu mol m^{-2} s^{-1}$) to 2 p.m. and from 4:30 p.m. ($900-1100mu mol m^{-2} s^{-1}$) onwards it started to decrease and reach the levels equivalent to 6:30 a.m. by 7 p.m. ($5-10mu mol m^{-2} s^{-1}$). But the clones of TTL1, TTL-4 and UPASI-9 showed low temperature tolerance as appeared in chlorophyll a fluorescence response. They showed a higher percentage increase in MDA levels, as compared to TTL-6, CRA-6017 and SMP-l, which showed low temperature susceptibility. But the reduction in the level of MDA by 4:30 p.m. (recovery) was faster in the clones TTLl, TTL-4 and UPASI-9, as compared to TTL-6, SM/OM/54 and SMP-l. The result indicates that in TTL-6, SMP-l and SM/ OM/54, the toxic oxygen species scavenging mechanisms may be less functional as compared to other clones. The percentage increase of proline and carotenoids was higher in clones TTL-l, TTL-4 and UPASI-9 as compared to TTL-6, CRA-6017 and SMP-l. |
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| 키워드 |
| Camellia sinensis;clones;low temperature;photosynthesis; |
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Journal of Plant Biology / v.48, no.3, 2005년, pp.326-331
한국식물학회
ISSN : 1226-9239
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200507521948436)
언어 : 영어 |
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| 논문 제공 : KISTI 한국과학기술정보연구원 |
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