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Synopsis This issue brings out original research and review papers on pollen-spore and pollination ecology. The topics covered include sexual systems, breeding systems and pollination ecology of some tropical plants, effectiveness of bees as pollinators, pollen and nectar sources of the digger bee, Amegilla, prospects and challenges of pearl millet pollen, airborne fungal spores and their allergenicity and application of remote sensing techniques in pollen studies. This research information is of immense value for biologists, agriculturists, apiculturists, academicians, etc. the authors of each paper have discussed their research findings in pollen and pollination ecology, aerobiology and applications of remote sensing techniques in atmospheric pollen studies. This information is expected to be useful for taking necessary measures for the conservation and management of plant species studies and their pollinators. Amegilla, a ground-nesting bee has been little studied in India. This issue provides some information on pollen and nectar sources of this bee and this information is useful for the conservation of this wild been. Pearl millet is an economically and commercially important crop. The pollen information is highly valuable for breeding programmes to improve the genetics of this millet in order to increase yields and stability of the genome. There is very little information on the importance of remote sensing techniques in pollen studies and the paper included in this issue adds some information on the applications of remote sensing techniques in pollen studies. The importance of airborne fungal spores in understanding allergy in a particular environment has been highlighted. These diverse topics included in this volume surely help scientists and others alike to understand and improve their knowledge in pollen-spore research.