Metabolism of P-particles (polysaccharide particles) in mature pollen grains ofEryngium campestre L. (Apiaceae) |
| |
Authors: | Martina Weber |
| |
Institution: | (1) Institute of Botany and Botanical Gardens, University of Vienna, Vienna |
| |
Abstract: | Summary The metabolism of P-particles (polysaccharide particles) was investigated in mature pollen grains ofEryngium campestre L. Numerous P-particles, originating from dictyosome activity, are found to be accumulated near the apertures, followed by mitochondria. A single layer of ER profiles seems to prevent the fusion of the P-particles with the intine. Instead of this, they fuse with each other forming nonmembrane-bounded polysaccharide-aggregates, which subsequently change their granulated structure to an amorphous. Mitochondria together with small vesicles are involved in the conversion-process. The so formed wall precursors pass through the ER and fuse into the intine. |
| |
Keywords: | Apiaceae Eryngium campestre Metabolism Pollen grain P-particle Ultrastructure |
本文献已被 SpringerLink 等数据库收录! |
|