Abstract
Brown leaf spot (BLS), Bipolaris oryzae is one of the emerging threats to the rice crop. Its infection caused deficiency of
minerals contents in rice crop. Therefore, current study was designed to determine the variations of ionic contents in rice
crop after the attack of BLS disease. The leaf samples of resistant rice varieties (Kissan Basmati, Chenab Basmati, IRRI-6)
and susceptible varieties (Basmati-2000, Basmati-515, KSK-133) were analyzed, and the significant alterations (p ≤ 0.05) in
the ionic contents were noted across treatments, types (un-inoculated and inoculated), groups (susceptible and resistant) and
varieties of rice due to the infection of the pathogen. Nested structure analysis of variance revealed a significant difference in
ionic status (N, P, K, Na, Ca, Cu, Fe, and Zn) of rice leaves. Resistant type of plants expressed 1.28% and 0.54% while
susceptible type showed 1.22% and 0.43% difference in concentrations of N and K respectively. Moreover, resistant type
expressed 7379.23, 2229.47, 5.02, 222.68, 28.94 and 662.29 ppm; while, susceptible type showed 7025.38, 1895.02, 4.15,
177.95, 22.17 and 520.71 ppm difference in concentrations of P, Na, Cu, Fe, Zn and Ca, respectively. It was accomplished
that resistant variety stored ionic contents at higher concentrations than susceptible. The higher ionic contents concentration
in resistant rice plants build up the physiological and biochemical processes of the rice plant, which help to avoid the spread
of the pathogen.
Muhammad Imran, Shahbaz Talib Sahi, Muhammad Atiq, Amer Rasul. (2020) DISPARITY IN MINERAL CONTENTS OF RICE GENOTYPES INFECTED WITH BROWN LEAF SPOT, Pakistan Journal of Agricultural Sciences, Volume 57, Issue 6.
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