ACKNOWLEDGEMENTS
We would like to express our thanks to Assoc. Prof. Dr. Thaweesakdi Boonkerd for his criticism of
the manuscript. This work was supported by the TRF/BIOTEC Special Program for Biodiversity
Research and Training grant T_146004 and Chulalongkorn University through ‘Plants of Thailand
Research Unit’ and ‘Grants for Development of New Faculty Staff’..