Effect of Temperature on Photosynthesis Characteristics in the Passion Fruits ‘Summer Queen’ and ‘Ruby Star’
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Abstract
<p>The effects of temperature and light on photosynthetic, chlorophyll fluorescence characteristics under high temperature in the passion fruits ‘Summer Queen’ (P. edulis × P. edulis f. flavicarpa) and ‘Ruby Star’ (P. edulis × P. edulis f. flavicarpa) were examined. Photosynthetic rates of both cultivars markedly and linearly increased up to 300 μmol·m−2·s−1, and less markedly increased from 300 to 1500 μmol·m−2·s−1 under several light conditions. Their light saturation points were recorded at around 1200 μmol·m−2·s−1 photosynthetic photon flux densities (PPFD). Regarding the relationship between temperature and photosynthesis, the maximum value of the apparent photosynthetic rate of ‘Summer Queen’ was observed at 30°C, and it was lower at both lower and higher temperatures. In ‘Ruby Star’, on the other hand, the maximum value was observed at 20 to 30°C, and this decreased at 35 and 40°C. The gross photosynthetic rate of ‘Summer Queen’ decreased over 30°C whereas in ‘Ruby Star’, it decreased to a lesser extent. The transpiration rate of ‘Ruby Star’ was higher than that of ‘Summer Queen’ at 40°C. Dark respiration increased from 20 to 40°C in both cultivars. Concerning chlorophyll fluorescence characteristics, ‘Summer Queen’ showed high-temperature injury at 40°C and all parameters were significantly decreased at 45°C. On the other hand, Fv/Fm showed only a slight decrease at 45°C in ‘Ruby Star’. These results indicate that ‘Summer Queen’ is susceptible to heat stress and that the range of its optimal temperature for photosynthesis is lower than ‘Ruby Star’.</p>
Journal
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- The Horticulture Journal
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The Horticulture Journal 86 (2), 194-199, 2017
The Japanese Society for Horticultural Science
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Details 詳細情報について
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- CRID
- 1390282680736820736
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- NII Article ID
- 130005612854
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- NII Book ID
- AA12708073
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- ISSN
- 21890110
- 21890102
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- NDL BIB ID
- 028109924
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed