biologia plantarum

Biologia plantarum 46:467-470, 2003 | DOI: 10.1023/A:1024315327710

Assessment of Phytotoxicity of α-Aminoalkanephosphonic Acids Derivatives

K. Bielecki¹, A. Dziamska², J. Sarapuk²

¹ Department of Botany and Plant Physiology, Agricultural University, Wrocław, Poland

² Department of Physics and Biophysics, Agricultural University, Wrocław, Poland

Newly synthesized derivatives of α-aminoalkanephosphonic acids (aminophosphonates) differ in the substituents at the carbon, nitrogen, and phosphorus atoms. They modified in different degree the properties of cucumber (Cucumis sativus cv. Wisconsin) cotyledon membranes, physiological activity of some enzymes (guaiacol and pyrogallol peroxidases, and catalase), chlorophyll content, and cellular membrane lipid peroxidation. Most active modifiers were those possessing sufficiently long hydrocarbon substituents at the nitrogen atom (C₁₀H₂₁) or isopropyl chain at the phosphorus atom. The branched tertbutyl group at the carbon atom enhanced slightly the activities of peroxidases in contrast to hexane ring at the same position, which decreased them.

Keywords: catalase; chlorophyll; cucumber; Cucumis; cotyledon; guaiacol and pyrogallol peroxidases; lipid peroxidation

Subjects: α-aminoalkanephosphonic acids, aminophosphonates; catalase; chlorophyll, aminophosphonate phytotoxicity; cucumber, aminophosphonates; Cucumis sativus; guaiacol peroxidase; lipid peroxidation; phytotoxicity, α-aminoalkanephosphonic acid derivatives; pyrogallol peroxidase

Prepublished online: April 1, 2003; Published: November 1, 2003  Show citation