Premium
THE ANTHER TAPETUM IN CYTOPLASMIC‐GENETIC MALE STERILE SORGHUM
Author(s) -
Brooks Maegaret H.,
Brooks James S.,
Chien Lucia
Publication year - 1966
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.1537-2197.1966.tb06849.x
Subject(s) - tapetum , biology , stamen , pollen , sterility , botany , cytoplasmic male sterility , microspore
Measurements of anthers of five fertile lines of Sorghum vulgare Pers. indicate that the tapetum decreases in radial extent following the two‐celled dyad stage of meiosis. At a mature pollen stage 78% of the anthers of fertile lines and 88% of those of a fertility restorer line have a narrow tapetum measuring between 4 and 16 μ radially, with the remainder having a degenerate tapetum less than 4 μ wide. In isogenic sterile lines, approximately 68% of the anthers have a narrow tapetum less than 16 μ wide at a “prepollen” stage, which represents the terminal stage in the sterile lines, whereas the remaining 32% have a well‐developed or enlarged tapetum measuring over 28 μ in radial width. Tapeta in the sterile lines have a variation in width and in morphology not encountered in fertile lines and presumably display the variable manifestations of nuclear‐cytoplasmic interaction characteristic of cytoplasmic‐genetic male sterility.