Flowering and pollen value of selected species of umbelliferous family - Umbelliferae Juss. (Apiaceae Lindl.) in Lublin region. Part II. Pollen efficiency and insect visit

Abstract

This paper is a second part of publication concerning the flowering and pollen value of some species of the Umbelliferae family. They were: Aegopodium podagraria L., Angelica silvestris L..Anthriscus silvestris L. (Hoffm), Chaerophyllum aromaticum L., Eryngium planum L., Heracleum sibiricum L., Pastinaca sativa L. The aim of a present paper was to estimate a pollen efficiency and insect visit of examined species. The mean pollen mass produced by 100 flowers differed among species and their successive rows. The highest mean mass of pollen was obtained from 100 flowers of Heracleum sibiricum, the lowest from Chaerophyllum aromaticum, respectively. Mean pollen efficiency per one plant was highest for Pastinaca sativa (215.3-333.2 mg), the lowest for Aegopodium podagraria (55.7-80.9 mg). The best pollen producers per one plant and 1 m2 were: Pastinaca sativa, Heracleum sibiricum and Angelica silvestris. Differentiation of pollen grains measurements was found between successive rows of the examined species. The lowest dispersion of pollen grains measurements was recorded for Chaerophyllum aromaticum and Anthriscus silvestris, while the highest for Heracleum sibiricum. Under good weather conditions all examined species were visited by various insects, they collected both nectar and pollen. The most intensive visitation was noticed on 1 m2 of Eryngium planum, the lowest on Anthriscus silvestris and Chaerophyllum aromaticum.