Back to Search
Start Over
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].
- Source :
-
Photosynthetica . 2024, Vol. 62 Issue 1, p116-125. 10p. - Publication Year :
- 2024
-
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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03003604
- Volume :
- 62
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Photosynthetica
- Publication Type :
- Academic Journal
- Accession number :
- 175591053
- Full Text :
- https://doi.org/10.32615/ps.2024.007