Abstract
At definite intervals after spraying α-Naphthalene acetic acid (1:20, 000), the half-leaves of Nicotiana glutinosa were inoculated with pressed juice from tobacco mosaic diseased leaves of Nicotiana tabacum by carborundum method and the number of lesions developed was measured.
The results revealed the presence of inhibitory effect to tobacco mosaic virus in the treated plants up to 96 hours after spraying α-N. A. A.
The treated leaves showed higher activity of catalase than untreated ones.
It is suggested that the high activity of catalase in the treated leaves may decrease the susceptibility of host plant to the tobacco mosaic virus and may be one of factors causing the inhibitory effect.
