DIFFERENTIAL SENSITIVITY OF CALLUS DERIVED FROM IMMATURE PANICLES OF RICE CULTIVARS TO THE NONSPECIFIC TOXIN OF PYRICULARIA-GRISEA

Authors
PRABHU AS RUSH MC
Citation
As. Prabhu et Mc. Rush, DIFFERENTIAL SENSITIVITY OF CALLUS DERIVED FROM IMMATURE PANICLES OF RICE CULTIVARS TO THE NONSPECIFIC TOXIN OF PYRICULARIA-GRISEA, Plant cell, tissue and organ culture, 50(1), 1997, pp. 13-18
Citations number
26
Categorie Soggetti
Plant Sciences
Journal title
Plant cell, tissue and organ culture → ACNP
ISSN journal
01676857
Volume
50
Issue
1
Year of publication
1997
Pages
13 - 18
Database
ISI
SICI code
0167-6857(1997)50:1<13:DSOCDF>2.0.ZU;2-2
Abstract
An in vitro screening procedure was adapted to study the sensitivity o f callus to the toxin picolinic acid of Pyricularia grisea in four ric e cultivars. The lethal dose LD50 was determined on the basis of probi t-log dosage response curve. The values of LD50 were 10, 51, 129 and 1 51 ppm for Tetep, Newbonnet, Labelle and M 201, respectively. The call us culture of cultivar Tetep, with a known broad spectrum of resistanc e, exhibited a high toxin sensitivity whereas the highly susceptible c ultivar M 201 showed low sensitivity indicating the absence of relatio n between host plant specific resistance to blast and resistance of th e callus to toxin.