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ORGANELLE SIZE AND NUMBER IN FERTILE AND T‐CYTOPLASMIC MALE‐STERILE CORN
Author(s) -
Lee SheuLing Janet,
Warmke H. E.
Publication year - 1979
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.1537-2197.1979.tb06206.x
Subject(s) - stamen , tapetum , biology , plastid , ovule , organelle , cytoplasm , botany , cytoplasmic male sterility , meiocyte , mitochondrion , gametogenesis , pollen , sterility , microbiology and biotechnology , meiosis , genetics , chloroplast , gene , cryopreservation , embryo , microspore
Anthers of inbred F 44 fertile (N) and cytoplasmic male‐sterile (T) corn plants ( Zea mays L.) were compared cytologically. No differences between fertile and sterile anthers were observed in size and number of mitochondria or plastids until after the start of anther degeneration. A rapid division of mitochondria was observed, however, in the tapetum and sporogenous cells of both fertile and sterile anthers during early growth stages. This rapid increase in mitochondrial numbers per cell (some 20‐to 40‐fold) preceded tapetal breakdown in sterile anthers and did not occur in other anther cells or in plastids. Limited observations on the megagametophyte and nucellus revealed that mitochondria in ovules remain relatively constant in size and number during gametogenesis and do not undergo degeneration.