| 000 | 01442nab a2200253 a 4500 | ||
|---|---|---|---|
| 003 | AR-ReUNN | ||
| 005 | 20260702003308.0 | ||
| 008 | 260630s2006 ag |||||||||||||||||eng | ||
| 041 | 0 | _aeng | |
| 100 | 1 |
_aMajumdar, S. K. _9154505 |
|
| 700 | 1 |
_aLowry, R. J. _9154506 |
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| 245 | 1 | 3 | _aAn electron microscope study of the barrier between vegetative and generative nuclei in the pollen of Gasteria armstrongii / S. K. Majumdar; R. J. Lowry |
| 264 | 1 | _c2006 | |
| 300 | _a5 páginas | ||
| 500 | _afot. byn. | ||
| 520 | _aUltrastructure studies of the pollen grains of Gasteria armstrongii revealed the existence of a barrier between the vegetative and generative nuclei. The layer is continuous with the intine of the pollen wall. It is suggested that the cisternae of the endoplasmic reticulum appear between the two nuclei and deposition of pectic substances occurs in them. Later the pectine containing cisternae line up in the equatorial region and fuse to from the layer. Finally the layer separates from the intine and becomes the envelope around the generative nucleus. The chemical nature of the barrier is discussed. | ||
| 650 | 4 |
_aGasteria _9154507 |
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| 650 | 4 |
_aLiliaceae _9115697 |
|
| 650 | 4 |
_aPolen _96254 |
|
| 773 | 0 |
_tPhyton : Revista Internacional de Botánica Experimental = International Journal of Experimental Botany _x0031-9457 _gv. 28 n. 2 (1971) _w238927 |
|
| 942 | _cART | ||
| 035 | _a(IBONE)34595 | ||
| 001 | 239009 | ||
| 999 |
_c239009 _d239009 |
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| 040 |
_aAR-ReUNN _bspa _cAR-ReUNN _eaacr2 |
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