EEB340 Lecture 16.docx

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Department
Ecology & Evolutionary Biology
Course
EEB340H1
Professor
Rowan Sage
Semester
Winter

Description
Lecture 16 Alternation of Generations Alternation of GenerationsPsilotumEquisitumFerns leptosporangiate Homosporous HeterosporousLeptosporangiate Fernssorus is an aggregation of sporangiacome sori are convered by an indusiumcovering over the sporangiumprotects the sporangiaindusium dries and shrivels so mature spores better able to be dispersed into the environmentdiversity in how sori are arranged on the sporophyll different modes of maturation of the sporangia some allow for gradual maturation so that spores may be produced over longer period of timesori may be sitting on leaf marginfalse indusium leaf margin curling to protect the sporangiaannulus is the function equivalent of
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