• M.SREE DEV
• P.MADHUSUDANA REDDY

ABSTRACT The objective of the present study is to evaluate morphological responses of black gram seedlings exposed to five different concentrations of soil zinc. Black gram is the most important pulse crop cultivated in Kharif, Rabi and Summer throughout India. Zinc is a heavy metal as well as essential micronutrient needed by plants in small concentrations. Zinc plays important role in black gram crop growth and yield. By the application of recommended dose of zinc fertilizer Black gram crop yield can be increased, but at higher concentrations zinc causes phytotoxicity to the black gram plants. Intensive and indiscriminate use of agrochemicals resulted into excessive accumulation of zinc in agriculture soils. Pot culture experiment was conducted to study the phytotoxic symptoms of zinc metal in black gram crop. In this present work the external visible zinc phytotoxic symptoms on black gram seedlings are recorded at five different concentrations of soil zinc. Zinc phytotoxic symptoms recorded in this study are as follows low plant population due to failure of seed germination, inhibited root growth, brown necrotic spots on the leaves, down ward curling and rolling of leaves, negatively geotropic roots. The information provided by this study can be useful for researchers, black gram cultivating farmers and agriculture scientists.

Black gram, Zinc Phytotoxicity, Negative geotropism, Necrosis, Tip burning, Downward curling

"Zinc Phytotoxicity in Black gram (Vigna mungo)", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.10, Issue 7, page no.i373-i378, July-2023, Available :http://www.jetir.org/papers/JETIR2307850.pdf

"Zinc Phytotoxicity in Black gram (Vigna mungo)", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.10, Issue 7, page no. ppi373-i378, July-2023, Available at : http://www.jetir.org/papers/JETIR2307850.pdf