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GERMINATION OF THE DIMORPHIC FRUITS OF BIDENS PILOSA L.
Author(s) -
FORSYTH C.,
BROWN N. A. C.
Publication year - 1982
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1982.tb03248.x
Subject(s) - achene , germination , scarification , bidens pilosa , biology , seedling , botany , sexual dimorphism , horticulture , dormancy , endocrinology
S ummary Dimorphic fruits of Bidens pilosa were tested separately for differences in germinability and seedling development. The long achenes were found to germinate readily under a wide range of conditions while the short achenes showed fairly exacting germination requirements. Germination of the short achenes was found to be enhanced by red light treatment, scarification, applied hormones, leaching and increased oxygen tensions. Seedlings originating from short achenes showed lower survival rates and initially slower development than those originating from the long achenes. The implications of the morphological differences and differences in germination and development of the two achenes are discussed.