History Of Aerobiology

History Aerobiology

The term aerobiology was coined as early as 1930s by F. C. Meier who was the plant pathologist working in the Department of Agriculture, United States of America. However, this does not mean that aerobiological studies were not carried out prior to the 1930's. In fact, the preliminary aerobiological work and its applications to health and environmental pollution dates back to the period of the Vedas c. 3000 B.C. Aerobiology involves the study of airborne bioparticles, that is, particles of...

Step by Step Acetolysis Procedure

Erdtman's (1960) acetolysis technique is the most popular method, which is followed almost throughout the world. The different steps involved in this technique are given below 1) Collection and preservation of pollen material It involves collection of anthers from mature flower buds just before opening and anthesis of flowers by using clean forceps and preserving the anthers or sometimes anthers with a portion of filament of stamens in clean glass vials with 70 glacial acetic acid. Some...

The Chemical Composition Of Pollen

Though chemical composition of pollen from different plant species varies over a fairly wide range, generally it contains proteins 7-40 fats 1.52.3 , carbohydrates 7-12 , minerals 2.8-10.6 and traces of enzymes, hormones, vitamins, pigments and other components. Nectar, an aqueous sweet secretion by nectaries contains 5-80 sugars. Depending on the position, the nectaries may be floral or extra floral. Bees also feed on honeydew secreted by plant-feeding insects such as aphids. Nectar is...

Pollen Physiology Palynophysiology

Pollen Tube Calcium

Pollen physiology has attracted the attention of plant breeders and horticulturists for plant improvement programmes ever since the discovery of the pollen tube by Giovanni Batista Amici 1924 , an Italian astronomer and mathematician, while examining the papillate stigma of Portulaca oleracea. Physiological studies have mainly centred round pollen germination, storage, and on the artificial induction of pollen sterility in cultivated plants, to be of benefit in large-scale hybridization...

Pollen Calendar Of Bangalore City India

The magnitude as well as the quality of pollen load in the atmosphere vary from year to year. There can be significant variations in atmospheric pollen even between successive years. This aspect was highlighted by Agashe and Abraham 1990 while compiling the pollen calendar of Bangalore city for the two consecutive years, 1982-1983 and 1983-1984. It is seen that in these two pollen calendars, 15 major pollen types constituted over 96 of the total pollen load in the atmosphere of Bangalore. There...

Pollen Morphological Description of Some Plants

A POLLEN MORPHOLOGY OF CERTAIN TROPICAL ANGIOSPERMOUS PLANTS Tropical angiospermous flora of India, very rich in families, genera and species is highly diversified. Similarly the pollen morphology of these plants shows great variation. It is not possible to describe pollen morphology of many of these plants in this volume. However, the Mimosaceae Mimosoids family is chosen for a detailed pollen morphological description for two reasons. The plants belonging to this family are cultivated widely...

Current Techniques in Palynology

Understanding and mastering the techniques for studying various aspects of pollen, both modern and fossil, is very important (Faegri and Iversen 1964). The primary purpose of using various palynological techniques is to undertake microscopic examination of pollen and spores. Essential pollen morphological characters can be studied only if proper techniques are employed by the investigators. In case of fossil pollen and spores, maximum caution has to be taken to recover them in an undamaged...

Study Of Pollen Grains Introduction

Palynology involves the study of pollen and encompasses the structural and applied aspects of pollen. Pollen grains are the male reproductive structures produced by the flowering plants (angiosperms) and gymnosperms (naked seeded plants). Palynology is a distinct branch of biology and is unique in many ways. According to the modern and wider definition of palynology, it also includes the study of spores produced by lower plants such as Algae, Fungi, Bryophytes and Pteridophytes. According to...

The Role Of Palynology In Agriculture Horticulture And Plant Breeding

For many centuries it was known but not understood, that the yellow dust (pollen), when transferred by insects or carried artificially by man, from the dehisced anthers of one flower to the stigmas of another flower, resulted in the formation of fruit. As time progressed from the late 18th century, through the 19th and 20th centuries, an understanding of the nature of this process of transfer, called pollination, took place. The majority of pollen-producing plants require the pollen to be...

Pollen Calendar Of Allahabad Up India

Aeropalynological survey of Allahabad was carried out by Nautiyal and Midha (1984) during 1973-1979. The survey was carried out mostly by gravity slide method in different areas of Allahabad City. Airspora determined at and around the Allahabad Univesity, Botany Department from Oct 1973-Sep 1974 has been depicted in Fig. 13.10d. Fig. 13.10d Pollen calendar of Allahabad, U.P., India from Oct 1973-Sep 1974. Fig. 13.10d Pollen calendar of Allahabad, U.P., India from Oct 1973-Sep 1974. The pollen...

Vertical Cylinder Pollen Trap

Vertical Cylinder Spore Trap

Glass vertical cylinders were shown to be reasonably efficient in sampling air-spora Gregory 1951 Hirst 1959 . The sampler was modified by Ramalingam 1968 to suit for routine aerobiological work in Indian conditions Fig. 13.4 . Vertical cylinder pollen trap, a wind impaction air sampler, is found to be most suitable on account of its simple construction and efficiency. The spore-trapping surface is an adhesive-coated cellophane tape wrapped around a glass cylinder of 0.53 cm in diameter,...

Allergy Status In Bangalore India

Inspite of the fact that Bangalore has the unique distinction of gaining many adjectives including 'Air Conditioned City of India' , 'Garden City', etc. it is also gaining another dubious distinction as 'Allergy City'. It is said that this city has the highest atmospheric pollution next to Delhi, which is responsible for a large proportion of the population suffering from various types of allergies. On account of the numerous parks and gardens-grasses, weeds and trees, atmospheric pollen occur...