a total of 65 pollen types were identified from two years atmospheric pollen survey in the environmental conditions of south assam. out of them, eight pollen types viz., acacia auriculiformis, amaranthus spinosus, cassia alata, cleome gynandra, cocos nucifera, imperata cylindrica, ricinus communis and trewia nudiflora, were selected for biochemical studies on the basis of their dominance in the...