Assertion: pistil | /r/HasProperty | collected at the heading stage
Facets:
Source sentences:
text: Root, node, internode, flag leaf, glume, lemma, palea, lodicule, stamen, pistil , and rachis tissues of the common wheat landrace "Wangshuibai," grown in a field during the normal growing season, were collected at the heading stage, and developing kernels were collected at the 9th day postanthesis for RNA extraction.