Research in agriculture involves production of new and better varieties of crop plants, plant protection against insects and weeds, manage soil fertility. Many substances are capable of inducing same plant responses. In this context role of coordination chemistry is significant. Many transition metal complexes are been used to produce new varieties of crops, control soil fertility, protect the plants from insects, diseases and weeds. It has been observed that on complexation, the biological

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... vity of metal chelate changes compared to that of free metal and ligand alone 1,2,3. The microbial activity like antifungal and antibacterial of metal complexes showing an enhanced activity as compared to free metal and ligand has been reported 4. Transition metal complexes of substituted pyrazoles were tested for their plant growth regulating activity 5. Piperidene-2-carboxylic acid complexes of bivalent metal ions have been found to be useful in agriculture as plant growth regulating 6. Plant growth regulating activity of (2-chlorophenyl) (5-(2-hydroxyphenyl)-3-(pyridin-3-yl)-1H-pyrazol-4-yl) methanone and its Fe (III) and Cu (II) complexes on Trigonella foenum-graecum were studied 7. Abstract: Coordination complexes of transition metals with Schiff base ligand were synthesized. The characterization of these complexes were elucidated by physical parameters and spectral analysis namely colour, melting point, IR, NMR, UV, Magnetic measurements, TGA and ESR studies.. Plant growth regulating activity on seeds of Trigonella foenum-graecum (Methi), Triticum aestivum (wheat) and Brassica nigra (black mustard) has been studied using standard Blotter method for evaluation of inhibitory or stimulatory effects of the synthesized compounds. The plant growth analysis was decided by measurement of parameters like percentage of germination, seedling height, shoot length, root length, root/shoot ratio and vigor index. The values of these parameters have been used to make a conclusion about plant growth regulating activity of ligand and its complexes