Photosynthesis Response to Heat in Grapevine
Author Information
Author(s): Luo Hai-Bo, Ma Ling, Xi Hui-Feng, Duan Wei, Li Shao-Hua, Loescher Wayne, Wang Jun-Fang, Wang Li-Jun
Primary Institution: Beijing Key Laboratory of Viticulture and Enology, and Key Laboratory of Plant Resource Science, Institute of Botany, Chinese Academy of Sciences
Hypothesis
How do grapevine leaves respond to heat treatment at different temperatures and during recovery?
Conclusion
Heat treatment at 35°C did not significantly influence photosynthesis, while higher temperatures (40°C and 45°C) decreased photosynthesis mainly due to the activation state of Rubisco and the donor side of PSII.
Supporting Evidence
- Heat treatment at 35°C did not significantly inhibit net photosynthetic rate.
- At 40°C and 45°C, net photosynthesis rate decreased due to reduced Rubisco activation.
- Recovery of photosynthesis was slower after exposure to 45°C compared to 40°C.
Takeaway
When grape leaves get too hot, they can't make food as well, but they can get better again if it cools down.
Methodology
The study measured gas exchange parameters and chlorophyll fluorescence in grape leaves during heat treatments at 35, 40, and 45°C, followed by recovery at 25°C.
Limitations
The study focused only on specific temperatures and did not explore other environmental factors that may affect photosynthesis.
Participant Demographics
One-year old ‘Zuoyouhong’ grapevines (Vitis amurensis L.)
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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