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Fluctuations in cell cycle, morphology and metabolism of Anemia phyllitidis gametophytes are the most important hallmarks of GA 3 -induced antheridiogenesis.
Micron 2019 March 26
The research object concerns partially explained mechanisms of plant hormone participation in male sex determination in plants, among them in A. phyllitidis gametophytes during GA3 -induced antheridiogenesis. To provide an explanation of the mechanisms of fluorescence and white-light microscopy, cytophotometric, autoradiographic and spectrophotometic methods were used to study cell cycle, the number of nucleoli, the amount of DiOC6 -stained IMN/ER, in which endoplasmic reticulum (ER) constitutes the main part, and its distribution as well as the amounts of proteins and chlorophylls and activities of acidic (Ac) and basic (Ba) phosphatases (Phases). It was revealed that antheridiogenesis was accompanied by cell cycle arrest at S-phase, changes of the number of nucleoli with simultaneous changes of the amount of IMN/ER and its distribution as well as fluctuations of protein amounts and of activities of acidic (Ac) and basic (Ba) phosphatases (Phases). The results indicated that initiation of antheridiogenesis in A. phyllitidis gametophytes by GA3 was related to the elevation of GAs/ANs in the culture media, during its induction phase, and the elevation of IMN/ER and GAs/ANs amounts, during expression phase of this process.
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