ISSN:
1615-6102
Keywords:
Secale
;
Microspore
;
Pollen wall ingrowths
;
Transfer cells
;
Plasmatubules
;
Pollen
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary In the mature microspore ofSecale cereale, a set of wall ingrowths deposited as the first (outer) intine layer between exine and the microspore plasma membrane, are revealed by electron microscopy. The wall ingrowths form a girdle in the vicinity of the apertural region at the external pole of microspore which is in contact with the tapetum, so the microspore can be considered as a transfer cell which is polarized. After microspore division the second (inner) intine layer is deposited by the vegetative cell and forms a labyrinth of branched wall ingrowths. As a result, the periphery of a vegetative cell is also irregular and appears as very thin plasmatubules or evaginations delimited by plasma membrane and penetrating the pollen wall. The possible functions of the microspore as a transfer cell and the wall-membrane system of the vegetative cell are discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01323270
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