## 2 Materials and Methods
Figure 1: Rainfall map of Greece [56] showing the sampling areas with numbered dark-red asterisks, i.e., **1**: Naousa region (Central Macedonia); **2**: Kozani region (Western Macedonia); **3**: Chalkidiki peninsula region (Central Macedonia); **4**: Olympus Mt. area; **5**: Karditsa region (Western Thessaly); **6**: Fhiotida (or Phiotis) region (Lamia); **7**: Parnitha Mt. area (greater Attica region); **8**: Athens area (Attica Region); **9**: Kiato area (Peloponnese); **10**: Nemea area (Peloponnese); **11**: Ilia region (Peloponnese); **12**: Messinia region (Peloponnese); **13**: Sparta area (Peloponnese); **14**: Rethymno region (Crete Island); and **15**: Heraklion region (Crete Island). \begin{table}
\begin{tabular}{c c c c c c c} \hline
**Location** & **Lat** & **Long** & **Species** & \(\delta^{15}\)**N** & \(\delta^{13}\)**C** & \(\delta^{34}\)**S** \\  & **Lat** & **Long** & **Cultivation** & **(\%o), -Air** & **(\%o), -Air** & **(\%o), -V-PDB** & **(\%-CDT)** \\ \hline Ilia, South Gr & 37.84 & 21.28 & Tomato, _Solanum Lycopersicum_. MF & 3.1 & \(-\)28.1 & \(-\)1.6 \\ \hline  & & & 3.9 & \(-\)28.0 & \(-\)2.0 \\ \hline  & & & 4.3 & \(-\)28.7 & 2.4 \\ \hline  & & & 4.3 & \(-\)28.9 & \(-\)2.1 \\ \hline  & & & 4.4 & \(-\)28.7 & \(-\)2.1 \\ \hline  & & & 4.9 & \(-\)29.6 & 2.1 \\ \hline Median & & & 4.3 & \(-\)28.7 & \(-\)1.9 \\ \hline SD & & & 0.6 & 0.5 & 2.6 \\ \hline Kiato, South Gr & 38.01 & 22.75 & Orange, _Citrus sinensis_. MF & 1.8 & \(-\)25.6 & 4.6 \\ \hline  & & & 2.3 & \(-\)24.1 & 4.7 \\ \hline  & & & 2.7 & \(-\)24.8 & 4.7 \\ \hline  & & & 2.9 & \(-\)25.1 & 4.8 \\ \hline  & & & 2.8 & \(-\)25.1 & 4.7 \\ \hline  & & & 2.2 & \(-\)25.4 & 4.8 \\ \hline Median & & & 2.5 & \(-\)25.1 & 4.7 \\ \hline SD & & & 0.4 & 0.5 & 0.1 \\ \hline Sparta, South Gr & 37.08 & 22.43 & Orange, _Citrus sinensis_. MF & 5.1 & \(-\)25.4 & 5.1 \\ \hline  & & & 4.5 & \(-\)24.7 & 5.2 \\ \hline  & & & 4.9 & \(-\)25.1 & 5.1 \\ \hline Median & & & 4.9 & \(-\)25.1 & 5.1 \\ \hline SD & & & 0.3 & 0.4 & 0.1 \\ \hline Kiato, South Gr & 38.01 & 22.75 & Peach, _Pruuns persica_. MF & 1.2 & \(-\)25.0 & 4.2 \\ \hline  & & & 1.2 & \(-\)25.4 & 4.4 \\ \hline  & & & 1.8 & \(-\)25.6 & 3.9 \\ \hline  & & & 1.6 & \(-\)25.4 & 2.6 \\ \hline  & & & 0.1 & \(-\)25.9 & 2.3 \\ \hline  & & & 1.2 & \(-\)25.2 & 2.8 \\ \hline Median & & & 1.2 & \(-\)25.4 & 3.3 \\ \hline SD & & & 0.6 & 0.3 & 0.9 \\ \hline Kiato, South Gr & 38.01 & 22.75 & Citrus, _Rutaceae family_. OF & 12.1 & \(-\)25.9 & 5.1 \\ \hline  & & & Basilicum, _Ocimum basilicum_. NF & 5.2 & \(-\)26.7 & 7.2 \\ \hline Nemea, South Gr & 37.82 & 22.66 & Peach, _Pruuns persica_. MF & 2.4 & \(-\)25.7 & 3.1 \\ \hline Naousa- North Gr & 40.63 & 22.07 & Peach, _Pruuns persica_. MF & \(-\)0.2 & \(-\)26.5 & 3.1 \\ \hline  & & & \(-\)2.1 & \(-\)26.4 & 3.6 \\ \hline  & & & \(-\)1.6 & \(-\)26.6 & 2.0 \\ \hline  & & & \(-\)1.2 & \(-\)26.5 & 0.9 \\ \hline  & & & \(-\)1.5 & \(-\)26.6 & 2.2 \\ \hline  & & & \(-\)1.8 & \(-\)26. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Location** & **Lat** & **Long** & **Species** & \(\delta^{15}\)**N** & \(\delta^{13}\)**C** & \(\delta^{34}\)**S** \\  & & **Cultivation** & **(\%o), -Air** & **(\%o), -Air** & **(\%o), -PDB** & **(\%o), -VDT** \\ \hline SD & & & 0.7 & 0.1 & 1.0 \\ \hline Messinia, South Gr & 37.04 & 22.11 & Olive, _Olea Europea_.