The transmission of carrot mosaic virus (CMV) by the crude sap to 11 varieties of plants from 4 families was demonstrated. From these plants the virus could be transferred back to a healthy carrot cultivated from the seed in isolation. The incubation time required for the appearance of the symptoms of CMV was 7-20 days. The plants on which mosaic or spot symptoms appeared on the leaves after transfer by the sap at temperatures below 15°C remains habitually healthy after the transfer of virus at higher temperatures.
The results of the mechanical inoculation of CMV by the crude infectious sap to young carrots cultivated from seeds differentiated this virus fromApium virus 1, which after mechanical inoculation causes chlorosis of the youngest carrot leaves in contrast to CMV. A further differentiation of CMV fromApium virus 1 is shown by the fact that CMV can be transferred only to the familyDaucaceae. It differs in this fromApium virus 1 which is transferred exclusively to this family (Köhler, Klinkowski 1954). CMV is differentiated fromCucumis virus 1/Doolittle Smith by some different host plants.

It was observed that the polyploids ofTrigonella foenum-graecum produced by seed treatment with 0.2% colchicine died after two cotyledonary stage, while the ones produced by seedling treatment survived. The root and shoot of seed treated plants were found to be mixoploids. The root tips exhibited 2n to 12n chromosomes and with the passage of time there is a regular decrease in the frequency of cells with lower chromosomes. The frequency of dividing cells decreases considerably towards the end of the 6th day due to the highploidy of most of the ploid plants. In case of seedling treatment the first formed tissue was mixoploid of high level similar to that of seed treated ones but in some cases the growing tip reverted to low level of ploidy which lead to more or less normal growth.
Since the difference in the constitution of seed and seedling treated plants lies in their root system, it has been suggested that probably highploidy of root system in the former may be responsible for the 100% mortality of plants.

Decapitated seedlings ofLinum andPisum treated with TIBA paste either above or below the cotyledons, showed different morphogenetic changes especially on the epicotyl stumps, due to the differences in the correlations of their epigeous and hypogeous cotyledons respectively, these being also primarily responsible for the differing dominance of their shoot primordia.
At the earliest phases of germination, an antagonism between TIBA and IAA can be demonstrated on the first internode inLinum, which is usually very short, as well as on the petioles of thePisum cotyledons. The former could be enlarged only by treatingLinum seeds, even when ripening on the plant, with TIBA paste and the latter, if retained by soaking seeds ofPisum in a TIBA solution could be promoted by exogenous IAA. This, on the contrary, reversed the morphogenetic effects of TIBA uponLinum seeds.

1. It was found in agreement with the results of Fang and co-workers (1960) that gibberellic acid in concentrations between 2 and 80 mg./l. does not affect the ratio of radioactivities of¹⁴CO₂ liberated from glucose-6-¹⁴C and -1-¹⁴G (C₆/C₁) when acting for several hours on sliced wheat leaves, and that at a concentration of 10 mg./l. it does not alter the degree of inhibition of respiration due to fluoride, iodoacetate and malonate or the consumption of oxygen. A linear relationship was established between the decrease in¹⁴CO₂ liberation from glucose-¹⁴C and the concentration of gibberellic acid.
2. The C₆/C₁ ratio as well as the absolute values of radioactivity decrease more rapidly in the course of several days after the germination of plants grown in a solution of gibberellic acid (10-20 mg./l.) than in the water-grown control.
3. Fluoride inhibits the respiration of plants grown in gibberellic acid more than of those grown in water, its tissue concentration being either equal or less in the gibberellic-grown plants; the effect of iodoacetate and malonate is the same with plants of equal age (4 days) in both variants. The possible causes of this phenomenon are discussed.

The results are discussed of a quantitative and qualitative analysis of the protein characters of seed-enclosed cotyledons and of hypocotyls + roots (of the primary root) of germinated seeds of the following species:Phaseolus vulgaris L.,Phaseolus coccineus L.,Phaseolus lunatus L.,Phaseolus aureus Roxb.
1. A practically identical phaseolin was found in the cotyledonsof Phaseolus vulgaris L. andPhaseolus coccineus L., being absent inPhaseolus lunatus L. andPhaseolus aureus ROXB.
2. A protein component described as Phaseolus protein III was found in the hypocotyl + root ofPhaseolus vulgaris L.,Phaseolus coccineus L. andPhaseolus lunatus L.; it was absent inPhaseolus aureus Roxb.
3. The inequality of breadth of taxonic (group) specificity of the protein characters has been confirmed anew. This fact is discussed in connection with the relative phylogenetic age of the characters, On the basis of the results obtained a developmental scheme of the studied species is proposed.

During the development of the wheat leaf a decrease is observed in the degree of inhibition of respiration by fluoride, iodoacetate and malonate and in the ratio of the radioactivities of¹⁴CO₂ liberated from glucose-6-¹⁴C and glucose-l-¹⁴C (C₆/C₁), this pointing to an increase in the role of the pentose cycle in total respiration. This change is not due to an absolute increase in the activity of the pentose cycle in older leaves but mostly to a decrease in the activity of the glycolytic system. On the other hand, in leaves separated from the seed the ratio between the respiratory pathways changes due to the activation of the pentose cycle when atmospheric humidity decreases.
On the basis of the disproportion between the percentage of the glycolytic fraction of respiration as calculated from the decrease of the C₆/C₁ ratio during inhibition by fluoride and the percentage of inhibition of respiration by fluoride, the possible causes of the high C₆/C₁ ratios in young leaves are discussed. The values of these ratios occasionally exceed unity.

1. Le cicadineCalligypona pellucida FABR. est très vraisemblablement le vecteur des souches européennes de la jaunisse à virus des asters, les transmettant sur le poireau et l'oignon; cette maladie se manifeste surtout par la prolifération de 1'inflorescence.
2. Cette maladie n'était pas transmise par greffage des secteurs du bulbe du poireau atteint sur les bulbes de poireaux sains. On en peut donc conclure que le virus n'est pas présent dans le bulbe, ou qu'il n'y est qu'en quantité très petite, ou encore qu'il ne peut persister en état actif.
3. Le rapport entre les poireaux proliférés et les fleurs en l'inflorescence des plantes malades est variable, et il prouve ainsi la variabilité du niveau des virus dans l'inflorescence même.
4. Chez les plantes malades il n'y a que peu de graines qui se développent, et leur capacité de germination est faible.
5. Les expériences citées prouvent de nouveau tant l'acropétalité que la variabilité du niveau des virus dans les parties individuelles des plantes.

1. The influence of varying concentrations of gibberellic acid on seedlings of wheat, lettuce and oats (up 10 days old) was observed and optimal concentration of 10 to 100 μg GA/ml. was established. Biometric evaluation of the experiments showed significant stimulation of the overground parts with all concentrations used (0.1 to 100 μg. GA/ml.) and significant inhibition of bhe roots with concentrations 1 to 100 μg. GA/ml.
2. For lettuce only the concentration 10 μg. GA/ml. was used. In this case, too, increase in length of overground parts was significant and inhibition of root growth was observed. For oats the stimulating effect of GA was recorded for both overground parts and roots.
3. Fresh weight of wheat was stimulated only by concentrations of 100 μg. GA/ml. In the case of lettuce (where values of fresh and dry weight were taken for the whole plant) we found a marked stimulation of fresh weight and a somewhat smaller increase in dry weight.
4. Observation of the dynamics of growth in length of overground parts and roots and increase or fresh and dry weight in lettuce showed a mutual relation between the values recorded in control and experimental plants in the period of 4 to 10 days following germination.