. The cytoplasm of the plant cell. Plant cells and tissues; Protoplasm. M. animal cells as the Golgi apparatus, but in exceptional cases only. Therefore the opinion of Gicklhorn is not a solid basis for generalization. It is therefore demonstrated that all the formations described as Golgi apparatus in plant cells are dissimilar elements, belonging either to the vacuolar system or to the chondriome (chondriosomes and plastids) and that consequently there is no Golgi apparatus in plants. Other cytoplasmic formations:- In the cytoplasm of many cells and espe- cially in that of the Protista, gran
. The cytoplasm of the plant cell. Plant cells and tissues; Protoplasm. M. animal cells as the Golgi apparatus, but in exceptional cases only. Therefore the opinion of Gicklhorn is not a solid basis for generalization. It is therefore demonstrated that all the formations described as Golgi apparatus in plant cells are dissimilar elements, belonging either to the vacuolar system or to the chondriome (chondriosomes and plastids) and that consequently there is no Golgi apparatus in plants. Other cytoplasmic formations:- In the cytoplasm of many cells and espe- cially in that of the Protista, granules of chromatin have been reported {'o" which were supposed to have orig- inated as emissions from the nuclei. For several years, great importance j^ was attached to these granules \)i^-lL^ called chromidia. In reality the chro- midia, as a group, have never been characterized histochemically. It has been proved, on the contrary, that they represent dissimilar elements which can be stained with iron haematoxylin and which correspond, either to chon- fig. iss. — vida Faba. osmiophiiic driosomes altered by the fixatives, or piateiets in meristem ceiis of the . .. , root. Weigl s method of osnuc im- tO vacuolar precipitates. pregnatlon. (After BowEN). There is reason, also, to mention here the formations described for the first time in animal cells by the BouiN brothers, and by Garnier, then by Prenant, as ergastoplasm and later found as well, in some plant cells. These are in reality rather undefined formations and appear as superposed lamellae, or as spiral filaments, which have a strong aflfinity for nuclear stains. They have been observed in glandular cells and an important role in secretory phenomena has been attributed to them. All cytologists are in agreement today in recognizing that ergastoplasmic formations have no separate existence. They are most often simply artifacts — alteration fig- ures of the chondriosomes, plastids, vacuolar colloids, or para- plasmic
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