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VARIATIONS IN POLYMNIA POLLEN
Author(s) -
Wells James R.
Publication year - 1971
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1971.tb09955.x
Subject(s) - pollen , biology , botany , hybrid , scanning electron microscope , optics , physics
Photomicrographs of normal and aberrant Polymnia (Compositae) pollen were made with the scanning electron microscope and with the light microscope. Anomalous pollen forms from F 1 hybrids of P. maculata Cav. are compared to the parental type and to the closely related P. uvedalia (L.) L. Among the variations discussed are differences in size and form, fused aggregates, and reduction in length of spines. The cause of these variations is unknown, although similar anomalies were later found in a single P. maculata parent, Wells No. 740, which grew under similar standard greenhouse conditions.