ISSN:
1432-2048
Keywords:
Pollen tube
;
Style
;
Callose
;
Petunia
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract In Petunia pollen tubes growing in the style there appear to be two ways of callose deposition. The first one is callose deposition outside the plasma membrane as a distinct layer closely appressed to the cell wall. The second one is callose deposition within the cytoplasm as distinct callose grains, leading to the formation of callose plugs. This second way is accompanied by a characteristic ultrastructure of the cytoplasm, namely strong electron-density of the plasma matrix, partial absence of the plasma membrane and the absence of plastids and dictyosomes. For both ways of callose deposition a mechanism is proposed and the function of callose plugs is discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00386003
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