Abstract:
:Treatment of barley (Hordeum vulgare) seedlings with 400 millimolar NaCl for 3 days resulted in a reduction in plant growth and an increase in the leaf content in ions (K(+) + Na(+)) and proline. Purified mitochondria were successfully isolated from barley leaves. Good oxidative and phosphorylative properties were observed with malate as substrate. Malate-dependent electron transport was found to be only partly inhibited by cyanide, the remaining oxygen uptake being SHAM sensitive. The properties of mitochondria from NaCl-treated barley were modified. The efficiency of phosphorylation was diminished with only a slight decrease in the oxidation rates. In both isolated mitochondria and whole leaf tissue of treated plants, the lower respiration rate was due to a lower cytochrome pathway activity. In mitochondria, the activity of the alternative pathway was not modified by salt treatment, whereas this activity was increased in whole leaf tissue. The possible participation of the alternative pathway in response to salt stress will be discussed.
journal_name
Plant Physioljournal_title
Plant physiologyauthors
Jolivet Y,Pireaux JC,Dizengremel Pdoi
10.1104/pp.94.2.641subject
Has Abstractpub_date
1990-10-01 00:00:00pages
641-6issue
2eissn
0032-0889issn
1532-2548journal_volume
94pub_type
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