A comparison of the effects of γ-ketotriazole, MCPA and carbaryl on the plasma membrane Mg2+-ATPase activity and lipid composition of rice shoots (Oryza sativa)

✍ Scribed by R. Ros; D. T. Cooke; R. S. Burden; C. S. James; I. Picazo

• Publisher: Springer Netherlands
• Year: 1993
• Tongue: English
• Weight: 210 KB
• Volume: 12
• Category: Article
• ISSN: 0167-6903
• DOI: 10.1007/bf00144584

✦ Synopsis

The effect of y-ketotriazole, MCPA and carbaryl on the lipid composition and ATPase activity associated with plasma membrane fractions from rice (Oryza sativa cv Bahia) shoots was investigated . With yketotriazole and MCPA treatments the relative amount of i\s -avenasterol (%) was reduced in the plasma membrane, whereas with y-ketotriazole a reduction was also found in the sitosterol content, expressed as a percentage of the total free sterol composition . The fatty acyl chain length of phosphatidylcholine fractions from MCPA-treated plants was also reduced . The plasma membrane Mg"-ATPase activity was only stimulated in MCPA-treated plants . No changes were observed in lipid composition or ATPase activity with carbaryl treatment.