Kinetin-treated Flax Seedlings as Models for the Integration of the Plant Body
AMONG the many morphological experiments performed on various seedlings1 a recent experiment indicated in Fig. 1 seems to be particularly suitable to further the understanding of the growth correlations which are responsible for the integration of the plant body. Seedlings of Linum usitatissimum when decapitated above the first leaf pair always replace the lost top, when the cotyledonary buds grow out vigorously and prevent the development of the buds which are above them in the axils of the first two leaves, because the cotyledonary buds exhibit a much more advanced embryonic development because the cotyledons have a larger area than the first leaves. Kinetin immediately applied in 1 per cent lanolin to the bud of the first leaf caused it to expand, as in other cases2–4, but the cotyledonary shoots, even in this case, grew out more strongly and finally inhibited the shoot pretreated with kinetin (Fig. 1a).
Tetra-co-ordination of Nickel(II)—Some Complexes with Cyclohexylphosphine
THE problem of the tetra-co-ordination of nickel(II) has recently been the object of much interest1–3 owing to the peculiar situation of this ion in the field of co-ordination chemistry, and because of the many opportunities for testing theoretical predictions on the structural, magnetic and optical properties of transition metal complexes. Of particular interest are the complexes of the type NiX22PR3. These seem to be clear examples of pure tetra-co-ordination around nickel(II). We had previously examined by X-rays the crystal structure of the red diamagnetic compound4 NiBr22PEt3, and found it to be transplanar as expected. We did not detect any co-ordination along the other axis (unpublished work), as occurs in other cases, for example, in nickel bisdimethylglyoxime5.
Influence of Diluted Spent Wash of Sugar Industries Application on Yield of and Nutrient Uptake by Sugarcane and Changes in Soil Properties
A pot experiment was conducted to study the effect of irrigation with tube well water (S0) as well as with spent wash diluted for 25 (S25), 50 (S5O) and 100 (S100) times on yield of and nutrient uptake by sugarcane grown on Typic Chromustert. The results revealed that application of spent wash diluted at any level increased the sugarcane yield and nutrient uptake significantly over S0. Less diluted spent wash gave higher yield of biomass than the concentrated one. Though, there was tendency for slight increase in the soil salinity due to use of spent wash, yet the nutrient availability of P, K and S increased considerably. Further, there was indication of betterment in some physical conditions of soil.