Pak. J. Bot., 37(1): 97-104, 2005. | Back to Contents | ||||
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Updated: 09-07-09 | ||||
BIOCHEMISTRY OF RESISTANCE IN CHICKPEA AGAINST WILT DISEASE CAUSED BY FUSARIUM OXYSPORUM F. SP. CICERIS IFTIKHAR A. KHAN, S. SARWAR ALAM, A. HAQ AND ABDUL JABBAR*
Abstract: Chickpea lines Flip 90-131C, Flip 96-152C, Flip 96-153C, Flip 96-155C,
Flip 96-158C and ICCV 95503 were found highly resistant (0% incidence)
to wilt disease whereas Flip 85-29C, Flip 85-30C and Flip 96-154C (16-17%
incidence) were resistant to wilt disease. The chickpea lines Flip 85-29C,
Flip 89-14C, Flip 90-2C, Flip 92-148C and UC 27 were found resistant
when screened against culture filtrate of the same isolate, while the
lines Flip 90-74C, Flip 96-153, Flip 96-155C, Flip 96-157C, ICCV 95503
and UC 15 were tolerant. The two methods of screening did not show complete
correlation.
Total phenols in the uninoculated roots of resistant/susceptible test
lines did not show any correlation with the wilt resistance because
the susceptible lines produced higher phenolic contents as compared
to the resistant lines. The uninoculated roots of resistant chickpea
lines produced antifungal compounds whereas the susceptible line did
not produce any active compounds.
The inoculated roots of both resistant and susceptible lines produced
higher antifungal activity as compared to uninoculated ones. The resistant
chickpea lines produced an additional antifungal compound at Rf value
0.79 which was absent in susceptible lines, which might have a role
in imparting resistance against wilt disease. The methanol extract of
the stem produced one inhibitory zone at Rf value 0.11.
Nuclear Institute for Agriculture and Biology, PO Box 128 Jhang Road
Faisalabad, Pakistan. |
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