Journal of Environmental Biology

Allelopathic effect of four weed species extracts on germination, growth  and protein in different varieties of Glycine max (L.) Merrill.

 

Monica Verma and P.B. Rao

Department of Biological Sciences, College of Basic Sciences and Humanities

G.B. Pant University of Agriculture and Technology, Pantnagar-263 145, India

 

(Received: 2 December, 2004 ; Accepted: 10 August, 2005)

 

 

Abstract: Allelopathic effect of Ageratum conyzoides L., Cynodon dactylon (L.) Pers., Parthenium hysterophorus L., and Solanum nigrum L. were examined on seed germination, seedling growth, total protein content and protein profile on Ankur, Bhatt, Bragg, PK – 416, PS – 1042 and Shilajeet varieties of soybean (Glycine max (L.) Merill).  Aqueous extracts of weeds (10% w/v) showed both inhibitory and stimulatory influence on percent seed germination and seedling growth in different varieties of soybean.  On the basis of per cent reduction in different parameters, the variety Bragg and PS – 1042, and Shilajeet  were  resistant and  susceptible respectively to different weed extracts, and among weed extracts, S. nigrum was most effective followed by P. hysterophorus compared to others.  The total protein content (mg/g f wt.) in different varieties was increased with all the weed extracts except Bragg with C. dactylon and P. hysterophorus, PS – 1042 with A. conyzoides and Shilajeet with C. dactylon, in which it was decreased.  The protein banding pattern in different varieties not only differ between control and treatments but also among treatments.  The order of susceptibility of different varieties with different weed extracts followed the order :  Ankur > PK – 416 > Bhatt > Shilajeet > Bragg and > PS – 1042.

 

Key words:  Allelopathic effect, Germination and growth, Protein and protein profile, Soybean, Weed extracts.  

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