Inhibition of pigment biosynthesis in cucumber cotyledons by isoxaflutole

Title:

Inhibition of pigment biosynthesis in cucumber cotyledons by isoxaflutole

Creator:

Kushwaha, S. and Bhowmik, P. C.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:e96ac48b-5b74-47d8-a316-dfa63bdfb313
uuid:e96ac48b-5b74-47d8-a316-dfa63bdfb313
issn:0300-3604
doi:10.1023/A:1007115307551

Subject:

5-aminolevulinic acid, Cucumis sativus, homogentisic acid, and hydroxyphenyl pyruvate dioxygenase

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Isoxaflutole [5-cyclopropyl-4-(2-methylsulphonyl-4-trifluromethylbenzoyl)isoxazole] is a new preemergence herbicide for broad-spectrum weed control in maize. The effect of isoxaflutole on chlorophyll (Chl) and carotenoid (Car) biosynthesis was investigated in cucumber (Cucumis sativus L.) cotyledons. Etiolated tissue was incubated with 5 mM isoxaflutole for 24 h and irradiated (60 μmol m-2 s-1). The irradiation for 3 h did not reduce Chl a, Chl b, and Car contents, but after a 28-h irradiation the contents of Chl a and Car decreased by 35 and 15 %, respectively, and the content of Chl b increased by 24 %. Increasing the concentration of isoxaflutole beyond 5 mM resulted in reduction of Chl a (71 %), Chl b (20 %), and Car (31 %) contents. Similarly, increase in irradiance from 60 to 180 μmol m-2 s-1 resulted in larger reduction of Chl and Car contents. Exogenously supplied 5-aminolevulinic acid did not reverse the isoxaflutole-inhibited Chl synthesis, whereas an exogenously supplied homogentisic acid lactone reversed the inhibition of pigment synthesis due to isoxaflutole. and S. Kushwaha, P. C. Bhowmik.

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

553-558

Source:

Photosynthetica | 1999 Volume:37 | Number:4

Harvested from:

CDK

Metadata only:

false