Table 2
Effect of kaolin on leaf temperature (T), net photosynthesis (Pn), transpiration rate (E), Fv/Fm (efficiency of PSII) and Area parameter (size of plastoquinone pool) in well exposed external leaves of Pinot noir vines. Kaolin treatment was executed on 3 August. Data were taken 7 and 18 days after treatment (10 August and 21 August) in the interval 13.00-14.00.
| T air (°C) | T leaf (°C) | Pn (nmol CO2 m"2 s"1) | E (mmol H2O m"2 s"1) | Fv/Fm | Area* | |
|---|---|---|---|---|---|---|
| 10 August | ||||||
| Untreated | 36.4 | 47.4 b | 0.9 b | 0.8 b | 0.486 b | 18900b |
| Kaolin | 42.2 a | 5.1 a | 2.2 a | 0.704 a | 32900 a | |
| 21 August | ||||||
| Untreated | 28.1 | 31.3 b | 3.4 b | 1.3 b | 0.520 b | 21500b |
| Kaolin | 29.6 a | 12.6 a | 2.7 a | 0.782 a | 35000 a | |
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