. The cytoplasm of the plant cell. Plant cells and tissues; Protoplasm. Chapter XIV — 159 The Vacuolar System or alcohol, is stained deeply red by aniline blue or violet basic dyes, as well as by haematein. It consequently shows a whole series of histochemical reactions which are very well known and are very different from those of the chondriosomes. It is, therefore, well established that there does not exist the slightest relation between the chondriome and the vacuolar sys- tem; they are two independent systems which are coexistent in the cell. There is between the young stages of the vacuo
. The cytoplasm of the plant cell. Plant cells and tissues; Protoplasm. Chapter XIV — 159 The Vacuolar System or alcohol, is stained deeply red by aniline blue or violet basic dyes, as well as by haematein. It consequently shows a whole series of histochemical reactions which are very well known and are very different from those of the chondriosomes. It is, therefore, well established that there does not exist the slightest relation between the chondriome and the vacuolar sys- tem; they are two independent systems which are coexistent in the cell. There is between the young stages of the vacuoles and the chondriosomes merely a coincidence of form. This close re- semblance exists, however, only in a very limited phase in the development of the vacuoles and seems to be explained by the fact that the vacuoles are at that moment in a semi-fluid physical state which is closely allied to the physical state of the chondriosomes. Physical characteristics of the vacuoles:- The chondriosome- shaped vacuoles seem to be of semi- fluid consistency and in a physical state which approaches that of the chondriosomes. Ultramicro- scopic examination shows that in general the chondriosome-shaped vacuoles are no more visible than the chondriosomes (Fig. 109). In certain cases, however (teeth of young rose leaflets, barley and wheat roots), it is possible to dis- tinguish them. They appear optic- ally empty and are visible only be- cause of their faintly luminous contours, , when they can be seen, they show the same charac- teristics in this respect as do the chondriosomes and the Fig. 103. — a, Cladophora; vital staining of large central and small peripheral vacuoles. 6, c, Ulothrix pseudo-ftocca; arrangement of vacuoles in b vegetative cells and in c zoosporangium. d, e. Cladophora; zoospores which have ceased swarming. /, Bryopsis plumosa; zoospore. g, Ulva Lactuca; zoospore which has just come to rest, at, stigma. (After Dan- GEARD). With the chondriosomes and the
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