+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Bentazon metabolism in tolerant and susceptible soybean (Glycine max) genotypes

Weed Science 36(4): 417-423
Bentazon metabolism in tolerant and susceptible soybean (Glycine max) genotypes
Previous reports have sugessted that bentazon [3-(1-methylethyl)-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide] tolerance among soybean genotypes is the result of differential translocation or metabolism. The basis for tolerance was reexamined using susceptible and tolerant genotypes. Tolerant genotypes ('Hill' and 'Clark 63') were found to tolerate 100- to 300-fold more bentazon than susceptible genotypes ('L78-3263', 'Hurrelbrink', and 'PI229.342'). Minor differences in absorption and translocation occurred among the genotypes but they did not correlate with tolerance. Tolerant genotypes metabolized 80 to 90% of absorbed bentazon within 24 h, while susceptible genotypes metabolized only 10 to 15%. Two major metabolites, theglycosyl conjugates of 6- and 8-hydroxybentazon, were formed in tolerant genotypes. Susceptible genotypes did not form the hydroxybentazon conjugates but instead produced relatively low levels of two unidentified metabolites. It is concluded that differential bentazon tolerance among soybean genotypes is linked to the ability to form both the 6- and 8-hydroxybentazon conjugates.

(PDF same-day service: $19.90)

Accession: 001535762

DOI: 10.2307/4044662

Related references

Deamination of metribuzin in tolerant and susceptible soybean glycine max cultivars. Pesticide Science 31(2): 175-184, 1991

Use of soybean glycine max and velvetleaf abutilon theophrasti suspension cultured cells to study bentazon metabolism. Weed Science 36(5): 558-565, 1988

Phosphorus uptake as a criterion for selection aluminum tolerant soybean glycine max genotypes. Pesquisa Agropecuaria Brasileira 20(10): 1163-1170, 1985

Preliminary studies of induction of somatic embryogenesis with cold tolerant genotypes of soybean (Glycine max). Genetic Manipulation in Crops Newsletter 4(1): 1-4, 1988

Germination and metabolism in susceptible and tolerant mungbean genotypes under moisture stress. Indian Journal of Plant Physiology 34(3): 267-270, 1991

Plant losses and yield responses to monoculture of soybean glycine max cultivars susceptible tolerant and resistant to phytophthora megasperma f sp glycinea. Plant Disease 70(5): 468-471, 1986

Comparative uptake, translocation, and metabolism of paraquat in tolerant Kwangkyo and susceptible Hood soybean. Pesticide Biochemistry & Physiology 47(2): 149-158, 1993

Uptake and metabolism of clomazone in tolerant-soybean and susceptible-cotton photomixotrophic cell suspension cultures. Plant Physiology 92(3): 777-784, 1990

Biology of telenomus chloropus hymenoptera scelionidae from eggs of nezara viridula hemiptera heteroptera pentatomidae reared on resistant and susceptible soybean glycine max genotypes. Canadian Entomologist 117(9): 1137-1142, 1985

Soybean (Glycine max) response to thifensulfuron and bentazon combinations. Weed Technology 12(1): 179-184, 1998