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“Pollen Buds” in Ophiorrhiza (Rubiaceae) and their Role in Pollenkitt Release
Author(s) -
Weber Martina,
Igersheim A.
Publication year - 1994
Publication title -
botanica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.871
H-Index - 87
eISSN - 1438-8677
pISSN - 0932-8629
DOI - 10.1111/j.1438-8677.1994.tb00794.x
Subject(s) - tapetum , pollen , immunogold labelling , rubiaceae , botany , chemistry , biology , stamen , ultrastructure , microspore
Pollen buds are apertural protrusions formed by the ectintine. In their wall unesterified and methyl‐esterified pectins are detected by immunogold labeling. During pollenkitt formation pollen buds become adpressed and connected to the tapetum wall. The following expansion of the endothecium causes the mechanical rupture of the tapetum at the binding sites of the pollen buds. These events are accompanied by the release of the pollenkitt.