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Reduced fertilization capacity of SO 2 ‐fumigated Picea omorika‐pollen
Author(s) -
Krug Elke
Publication year - 1990
Publication title -
european journal of forest pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.535
H-Index - 49
eISSN - 1439-0329
pISSN - 0300-1237
DOI - 10.1111/j.1439-0329.1990.tb01281.x
Subject(s) - pollen , germination , biology , pollination , human fertilization , pollen tube , horticulture , botany , agronomy
Dry pollen of Picea omorika was fumigated with 820 μg/m 3 SO 2 for 3 , 4 , or 5 days. Few or no adverse effects occurred during subsequent in vitro germination: germination percentage was not affected at all, and reduction of the pollen tube length was only 10% in pollen exposed for 5 days. Nevertheless pollination with fumigated pollen resulted in reduced seed production. 41% fewer seeds per cone were produced, and only 33% were filled seeds, compared to 70% filled seeds of the control. Seed‐weight was reduced from 3.6 g per thousand in the control to 3.0 g per thousand, when cones were pollinated with pollen fumigated for 5 days. Similar but less striking effects were found with pollen fumigated for 3 or 4 days.