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- Title
Photosystem II efficiency in response to diurnal and seasonal variations in photon flux density and air temperature for green, yellow-green, and purple-leaved cultivars of sweet potato [Ipomoea batatas (L.) Lam].
- Authors
JIANG, J. Y.; WANG, C. W.; CHEN, C. I.; CHEN, C. W.; WONG, S. L.; CHEN, S. P.; HUANG, M. Y.; WENG, J. H.
- Abstract
This study aimed to investigate the impact of diurnal and seasonal variations in photon flux density (PPFD) and air temperature on PSII efficiency in three sweet potato leaf-color cultivars: green (G), yellow-green (Y), and purple (P). The cultivars were exposed to full sunlight and measurements were taken from November to March. The maximal quantum yield of PSII photochemistry for the dark-adapted state (Fv/Fm) indicated Y's increased sensitivity to low temperatures at predawn, followed by G and P. Both quantum yield of PSII photochemistry for the dark and light- adapted state (ΔF/Fm') depressions were correlated with increased PPFD, with regression slopes in the order of Y > G > P. On high-light and low-temperature days, Fv/Fm values deviated below regression lines, with differences ranked as Y > G > P. These findings suggest that Y exhibits the highest sensitivity to high light and low temperatures, followed by G and then P in terms of PSII efficiency.
- Subjects
SWEET potatoes; ACTINIC flux; ATMOSPHERIC temperature; PHOTON flux; PHOTOSYSTEMS; CULTIVARS
- Publication
Photosynthetica, 2024, Vol 62, Issue 1, p116
- ISSN
0300-3604
- Publication type
Article
- DOI
10.32615/ps.2024.007