Archive image from page 455 of Dansk botanisk arkiv (1913-1981). Dansk botanisk arkiv danskbotaniskark02dans Year: 1913-1981 B Fig. 4. A. A pollen-mass which has germinated in pendant drop of a 5 per cent cane-sugar solution. X 25. B. The germination when 5 pollen-masses have been placed in a pendant drop of a 5 per cent cane-sugar solution. X 25. Further particulars about the conditions of the pollen-mass in culture will be arrived at by cultivating the pollen-masses in very small quantities of liquid e. g. in pendant drops. In this way the pollen-mass may alter the liquid, but this is evide
Archive image from page 455 of Dansk botanisk arkiv (1913-1981). Dansk botanisk arkiv danskbotaniskark02dans Year: 1913-1981 B Fig. 4. A. A pollen-mass which has germinated in pendant drop of a 5 per cent cane-sugar solution. X 25. B. The germination when 5 pollen-masses have been placed in a pendant drop of a 5 per cent cane-sugar solution. X 25. Further particulars about the conditions of the pollen-mass in culture will be arrived at by cultivating the pollen-masses in very small quantities of liquid e. g. in pendant drops. In this way the pollen-mass may alter the liquid, but this is evidently an altera- tion, which is of vital import for the development of the tube of pollen. It will be found that experiments of culture in pendant drops give constant results. By varying the size of the drop and the number of pollen-masses pla- ced in it the fol- lowing law may be derived: at low concentrations (5—10 per cent) it takes less liquid in proportion to the pollen-mass to produce a good germination than at higher concentrations (20—60 per cent). While one pollen-mass in a big pendant drop of a 5 per cent cane-sugar solution does not germinate otherwise than in a greater quantity of liquid of the same concentra- tion, the germination gets the better, the more pollen-masses are placed in such a drop (vid. Fig. 4). At higher concentra- tions in pendant drop, the quantity of liquid may be greater in proportion to the size of the pollen-mass than at 5 per cent, to produce a good germination, and I found that when the proportion between the cubic contents of the liquid and the pollen-mass was of a certain quantity, the germination became far better than I had ever found it in greater quantities of liquid, and the type of germination resembled the one produced in the style, (vid. Fig. 5). Upon this I tried how one pollen-mass germinates in greater quantities of liquid of different cane-sugar concentrations. Thus it Fig. 5. Pollen-mass which has germinated in pendant d
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