Treatment with methyl jasmonate alleviates the effects of paraquat on photosynthesis in barley plants

Title:

Treatment with methyl jasmonate alleviates the effects of paraquat on photosynthesis in barley plants

Creator:

Hristova, V. A. and Popova, L. P.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:d45e23c8-0668-459f-a70e-8eaad9d46c9b
uuid:d45e23c8-0668-459f-a70e-8eaad9d46c9b
issn:0300-3604
doi:10.1023/A:1024356120016

Subject:

barley, catalase, chlorophyll, glycolate oxidase, Hordeum vulgare, methyl jasmonate, paraquat, phosphoglycolate phosphatase, photorespiration, ribulose-1,5 bisphosphate carboxylase, and transpiration rate

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Twelve-day-old barley seedlings were supplied with 23 μM methyl jasmonate (MeJA) or 10 μM paraquat (Pq) via the transpiration stream and kept in the dark for 24 h. Then they were exposed to 100 μmol m-2 s-1 PAR and samples were taken 1, 2, 3, and 6 h after irradiation. Treatment of seedlings with MeJA alone resulted in decreased content of chlorophyll (Chl), and net photosynthetic (PN) and transpiration rates. Pq treatment led to a decrease in Chl content and to a very strong inhibition of PN, the effects were manifested by 1 h of irradiation. Pq treatment did not affect the activity of ribulose-1,5 bisphosphate carboxylase (RuBPC, EC 4.1.1.39) but increased the activity of the photorespiratory enzymes phosphoglycolate phosphatase (PGP, EC 3.1.3.18), glycolate oxidase (GO, EC 1.1.3.1), and catalase (EC 1.11.1.6). Pre-treatment of seedlings with MeJA before exposure to Pq fully blocked the inhibitory effect of Pq on photosynthesis and protected against subsequent Pq-induced oxidative damage. and V. A. Hristova, L. P. Popova.

Language:

Multiple languages

Rights:

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

Coverage:

567-574

Source:

Photosynthetica | 2002 Volume:40 | Number:4

Harvested from:

CDK

Metadata only:

false