Assertion: pistil's ovule | /r/AtLocation | front of them
Facets:
Source sentences:
text: Pollen tubes germinated on the medium (i.e., without growth through a style) were rarely attracted to ovules placed in front of them or to LURE peptides, which are known ovular attractants .
text: Hydrolytic degradation of β-glucuronosyl residues attached to the β-(1-6)-galactan side chain of AG sugar chains with β-glucuronidase drastically decreased AMOR activity (i.e., the percentage of pollen tubes attracted to ovules placed in front of them), suggesting that AG chains with β-glucuronosyl residues are critical for AMOR activity.