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Scientists Pinpoint a Rice Gene that Confers Broad-spectrum Herbicide Resistance
Posted by: Prof. Dr. M. Raupp (IP Logged)
Date: August 06, 2019 06:45AM

Rice experts from the National Agriculture and Food Research Organization
(NARO) in Japan and partners found a rice gene that confers broad-spectrum
resistance to -triketone herbicides. Benzobicyclon (BBC), a -triketone
herbicide, is useful in many rice paddies, however, some rice varieties are
susceptible to BBC. Discovery of the genetic cause of this susceptibility
will help breeders develop BBC-resistant crops. The results of the study are
published in Science.

NARO scientist, Hideo Maeda, and colleagues pinpoint the rice gene HPPD
INHIBITOR SENSITIVE 1 (HIS1), which confers resistance to BBC and other
herbicides of its kind. The researchers found that HIS1 encodes a specific
enzyme that detoxifies the herbicides by speeding up its degradation.
Further analysis revealed that BBC-susceptible rice inherited a
dysfunctional his1 from indica rice. When HIS1 was expressed in Arabidopsis,
the resulting plants showed resistance not just to BBC but to four other
-triketone herbicides.

Based on the findings, HIS1 could be used to develop herbicide resistant


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