Metabolites of Artemisia juncea and their Effect on Regulation of Thymocyte Volume

Chemistry of Natural Compounds -     

Crystal structures of atisine 15-acetoxyazomethine and 15-hydroxyazomethine and their biological activities

The 15-acetoxyazomethine derivative of atisine was prepared from atisine base. Its structure was confirmed by converting it to atisine 15-hydroxyazomethine and proved by an XSA. Atisine 15-acetoxyazomethine exhibited antiarrhythmic activity in rat cardiac arrhythmia models induced by CaCl₂ and aconitine. Atisine 15-acetoxyazomethine, in contrast with atisine 15-hydroxyazomethine, exhibited local anesthetic activity.     

Interaction of abscisic-acid-binding cotton (Gossypium hirsutum) protein and phytohormones

The interaction of representatives of three classes of phytohormones, abscisic acid (ABA), the synthetic auxin 1-NAA, and the synthetic cytokinin 6-BAP, with ABA-binding cotton protein was studied. Binding of ABA with its protein was shown to be specific and receptor-like. Competitive protein binding showed that 1-NAA (15±3%), 6-BAP (82±3%), and ABA (95±3%) replace³H-ABA from the protein complex. The possibility of reacting ABA-binding protein with various classes of intracellular phytohormones is discussed.Institute of Genetics and Experimental Biology of Plants, Academy of Sciences of the Republic of Uzbekistan, Tashkent, fax (99871) 64 22 30. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 252–253, May–June, 2000.     

Lipids from <Emphasis Type="Italic">Halostachys caspica</Emphasis> and <Emphasis Type="Italic">Halocharis hispida</Emphasis>

The composition of lipids from the aerial parts of two species of halophytes from the family Chenopodiaceae, Halostachys caspica C. A. Mey. and Halocharis hispida Bge. was determined. Neutral lipids (NL, 62.1 and 54.2%, respectively) dominated the total lipids (TL) of these plants. More than a third of the NL were esters of aliphatic alcohols and phytosterols (FAE). Fatty acids 16:0, 18:1, and 18:2 dominated the acids of FAE; 16:0, 18:1, and 18:3, the phospholipids. The principal fatty acids of glycolipids were unsaturated acids (68.3 and 75.1%) with linolenic acid dominating (44.9 and 43.5%). Presented at the 7th International Symposium on the Chemistry of Natural Compounds, Tashkent, October 16–18, 2007. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 276–278, May–June, 2009.     

ABA-binding protein of the cotton plantGossypium hirsutum and the specificity of its binding with ABA

It has been established by electrophoresis in PAAG that in all the organs and tissues of the cotton plantGossypium hirsutum L.³H-ABA binds with a protein having MM 19–20 kDa. Scatchardt analysis has shown that the binding is specific and receptor-like, with K_d=5×10⁻¹⁰M. Institute of Plant Genetics and Experimental Biology, Academy of Sciences of the Republic of Uzbekistan, Tashkentskaya Oblast, fax (3712) 64 22 30. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 688–690, September–October, 1998.