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THE CYTOLOGY OF POLLEN ABORTION IN S CYTOPLASMIC MALE‐STERILE CORN ANTHERS
Author(s) -
Lee SheuLing Janet,
Earle E. D.,
Gracen V. E.
Publication year - 1980
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.1537-2197.1980.tb07647.x
Subject(s) - pollen , tapetum , stamen , biology , cytoplasmic male sterility , cytoplasm , software maintainer , botany , sterility , vacuole , microspore , microbiology and biotechnology , genetics
The anther development of the S male‐sterile cytoplasm and the fertile maintainer (N) cytoplasm versions of corn inbred W182BN and the restored S cytoplasm version of inbred NY821LERf was studied by light and electron microscopy and compared to pollen abortion in the C and T types of male‐sterile cytoplasms. The S anthers did not deviate from the non‐male sterile (N) anthers until a very late stage of pollen development. Tapetal cells developed and disappeared normally in the S version which differentiates this cytoplasm from the C and T types. Although some modified membranous structures were seen in a higher frequency in the large vacuole of the sterile S pollen than in the N and restored S counterparts, the mitochondria and other organelles in the S pollen appeared normal up to the time of pollen abortion. Pollen abortion in the S cytoplasm did not occur until the developing pollen was nearly mature. At this time the pollen grains disintegrated abruptly but other anther tissues appeared unaltered. The male sterility of S plants appeared to be determined by the pollen itself without external influence from the tapetum.