Figure captions
Fig. 1 (a) Daily solar radiation in Geneva, green line and circles is time period June 2012-2013 and yellow line and open circles is June 2013-2014, both are fitted with a loess smoothed line with a 95% confidence region. (b) Monthly standardised anomalies in Geneva, red area is negative and blue are positive anomalies. The pollen development period (dark grey area) occur two months before dehiscence (April-May) and growing season (light grey area) is the formation and growth period of male pollen cone buds (July-October).
Fig. 2 (a) Boxplot of Pinus spp. pollen from 2013 (green) and 2014 (yellow). The box shows 1st and 3rd quartile, horizontal line within is the median and the whiskers show minimum and maximum values. The points represent samples of Pinus nigra, P. pinaster, P. sylvestris and P. uncinata analysed for p-Coumaric acid (pCA). (b) Posterior estimates of difference in pCA between years (grey area). When the 95% credible interval (black dotted line) does not overlap zero, the amount of pCA in the different years are credibly different. (c) Scatter plot of Pinus spp. showing the response of pCA production to different solar radiation in Geneva. (d) Scatter plot of Pinus spp. when pollen-grain size is accounted for, showing the response of pCA production to different solar radiation in Geneva. Pinus spp. pollen in 2013 (green circles) and 2014 (yellow circles), black line is the mean for each species.
Fig. 3 (a) Boxplot of shaded (green) and sun-exposed (yellow) Pinus sylvestris pollen. The box shows 1st and 3rd quartile, horizontal line within is the median and the whiskers show minimum and maximum values, excluding two outliers. The points represent all samples analysed for p-Coumaric acid (pCA). (b) Posterior estimates of difference in sun exposure treatments (grey area). When the 95% credible interval (black dotted line) does not overlap zero, the amount of pCA in the different years are credibly different. (c) Scatterplot of individual trees showing the response of the shaded (green circles) and sun-exposed (yellow circles) Pinus sylvestris pollen, black line is the mean for each tree.