• Dr. Amitava Nayek
• N.A.
• N.A.
• N.A.
• N.A.

An experiment was done to evaluate the allelopathic potential of an obnoxious weed Parthemium hysterophorus by using black gram (Vigna radiata) seeds as bioassay material. Fresh leaf extracts and dry leaf leachates of young, mature and old leaves were used for the experiment. Different concentrations of aqueous leaf extracts and leaf leachates of the test plant material were used for pretreatment of black gram seeds for 8 hours. Pretreated gram seeds showed reduced germination percentage and speed of seed germination with concomitant enhancement of the time required for 50% germination (T50) of Vigna seeds. Biochemical behaviour was measured in terms of leaching of free amino acids and soluble carbohydrate, content of soluble and insoluble carbohydrate, protein, amino acids and nucleic acids in seed kernel was abnormal. The seed pretreating agents enhanced deleterious leaching of soluble carbohydrates and free amino acids from the seeds with concomitant reduction of protein and nucleic acids as well as activities of catalase, dehydrogenase, amylase and protease. The soluble carbohydrate level was higher where as insoluble carbohydrate level found low. The protein and amino acid content in seed kernel was declined and DNA and RNA content were decreased remarkably. Seeds were also experienced with forced aging treatment and prepared 30 days accelerated aging seeds. The biochemical behaviour measured with the same parameters showed drastic abnormalities. A conclusion is made that the Parthemium hysterophorus possesses allelopathic property.

Allelopathy, Parthemium hysterophorus, Vigna radiata, seed germination behaviour, biochemical behavior, accelerated aging.

"ASSESSMENT OF ALLELOPATHIC STATUS OF Parthemium hysterophorus L. BY PHYSIOLOGICAL AND BIOCHEMICAL APPORACHES ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 2, page no.6-14, February-2019, Available :http://www.jetir.org/papers/JETIR1902802.pdf

"ASSESSMENT OF ALLELOPATHIC STATUS OF Parthemium hysterophorus L. BY PHYSIOLOGICAL AND BIOCHEMICAL APPORACHES ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 2, page no. pp6-14, February-2019, Available at : http://www.jetir.org/papers/JETIR1902802.pdf