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Pollen morphology of Quercus (subgenus Quercus, section Quercus) in Iran and its systematic implication

100%

Panahi P., Pourmajidian M. R., Pourhashemi M.

Acta Societatis Botanicorum Poloniae

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2012

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tom 81

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nr 1

For the first time, pollen morphology of 9 (4 spp. and 5 subspp.) taxa representing lobed leaved oaks of Iran in the family of Fagaceae has been examined and illustrated using light microscopy and scanning electron microscopy of acetolysed material. Detailed pollen morphological characteristics are given for Quercus section. The pollen grains are single, isopolar, radially symmetrical, tricolpate, tricolporoidate or tricolporate. Pollens were studied to show all possible characteristics like shape, size, apertures, wall thickness, etc., with special reference to the specific features of each pollen type such as structural, sculptural and suprasculptural patterns. There is considerable variation in pollen morphology between taxa so that, three types of pollen shape, five types of structural pattern, two types of sculptural pattern, five types of suprasculptural pattern and three types of perfora distribution are defined. Furthermore, the relationship between pollen morphology and taxonomy is discussed. Overall, pollen characters are shown to be a useful and informative tool for assessing taxonomic position within Quercus section in Iran.

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Airborne pollen of Olea in five regions of Portugal

84%

Ribeiro H., Cunha M., Abreu I.

Annals of Agricultural and Environmental Medicine

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2005

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tom 12

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nr 2

317-320

The aim of this work was to study spatial and temporal distribution of Olea europeae airborne pollen in different Portuguese regions: Reguengos de Monsaraz (south); Bairrada (west); Braga (northwest); Valenca do Douro and Foz Coa (north-east). Airborne pollen sampling was conducted from 1998-2003 using "Cour" type samplers located in each region. The main pollen season (MPS) of Olea lasted on average 36 days and occurred from late April until middle-to-end of June. During the studied period, inter-annual variations among and within regions, concerning the total annual pollen counts and the beginning, peak and ending dates of the MPS, were reported. Reguengos de Monsaraz and Bairrada registered the earliest MPS starting date, followed by Valenca do Douro and Foz-Coa, and the latest date was verified in Braga that also had the shortest MPS. Reguengos de Monsaraz presented the longest MPS with the highest differences in the beginning and ending dates, but minimum differences in the dates of the maximum pollen peak. Our results showed an increase in the Olea annual pollen index, from north to south, and from the west to the east regions of the country.

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Seasonal variations of airborne pollen in Allahabad, India

84%

Sahney M., Chaurasia S.

Annals of Agricultural and Environmental Medicine

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2008

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tom 15

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nr 2

Ograniczanie wyników

2 Annals of Agricultural and Environmental Medicine

1 Acta Societatis Botanicorum Poloniae

1 Abreu I.

1 Chaurasia S.

1 Cunha M.

1 Panahi P.

1 Pourhashemi M.

1 Pourmajidian M. R.

1 Ribeiro H.

1 Sahney M.

1 2012

1 2008

1 2005

Pollen morphology of Quercus (subgenus Quercus, section Quercus) in Iran and its systematic implication

Airborne pollen of Olea in five regions of Portugal

Seasonal variations of airborne pollen in Allahabad, India