Assertion: pistil's structure | /r/Synonym | a pollen tube
Facets:
value: through the style
type: OTHER
value: to the ovary
type: LOCATION
Source sentences:
text: When a grain of pollen germinates, it extends a structure called a pollen tube through the style to the ovary.
text: One, however, will develop into a structure called the pollen tube and later play the role of transporter.
text: During this process, the pollen grain undergoes a conformational change whereupon a given section begins to protrude outwards to form a tube-like structure, known as the pollen tube.