Effect of a wilt infection on the neutral lipids of cotton leaves

The composition of the neutral lipids of leaves of a cotton plant of the wilt-resistant variety 175-F, the set of components in the fatty acid composition of the lipid classes, and the partial structures of the triacylglycerides have been determined. The changes taking place in the composition and structure of these lipids on artificial infection of the plant by the fungal pathogenVerticillium dahliae have been elucidated.Institute of the Chemistry of Plant Substances, Uzbekistan Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 477–483, September–October, 1992.     

Influence of infection by Verticillium dahliae on the cuticular lipids of the leaves of cotton plants of variety 175

The composition of the cuticular lipids of young leaves of cotton plants of the wilt-resistant variety 175-F has been determined and it has been established that on artificial infection of the plant with cotton wilt(Verticilliuim dahliae) the component composition of these lipids did not change but the level of the 18:0, 18:1, and 18:2 acids in esters of fatty acids with alkanol, sterols, and triterpenols fell.Institute of the Chemistry of Plant Substances, Uzbek. Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 765–768, November–December, 1991.     

Influence of infection by Verticillium dahliae on the cuticular lipids of the leaves of cotton plants of variety 175

The composition of the cuticular lipids of young leaves of cotton plants of the wilt-resistant variety 175-F has been determined and it has been established that on artificial infection of the plant with cotton wilt(Verticilliuim dahliae) the component composition of these lipids did not change but the level of the 18:0, 18:1, and 18:2 acids in esters of fatty acids with alkanol, sterols, and triterpenols fell.     

Activation mechanism of intra-and extracellular cotton peroxidases by wilt infection

It was found that intra- and extracellular cotton peroxidases were involved in infection by the phytopathogen Verticillium dahliae. Extracellular peroxidase was more active. Its activity was greater in resistant variety AN-Bayaut-2 than in susceptible C-4727. It was found that activation in the susceptible cotton variety caused by pathogen infection occurred via de novo protein synthesis whereas in the resistant variety it occurred via synthesis of new ones and activation of already existing peroxidases.     

Influence of wilt infection on the gossypol pigments of seeds and roots of a cotton plant of the variety Tashkent-1

A study has been made of the gossypol pigments of the seeds and roots of a cotton plant of the variety Tashkent-1 infected with wilt in comparison with a healthy plant. The amount of gossypol in the infected plant was lower than in the healthy plant. In the diseased plant, gossypurpurin was concentrated in the roots, and in the healthy plant it was concentrated in the seeds. Gossypol possessing optical activity was detected in the seeds and roots of both the healthy and the diseased plants.Institute of the Chemistry of Plant Substances, Uzbek SSR Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 63–66, January–February, 1989.     

Effect of infection withVerticillium dahliae on the bound and strongly bound lipids of cotton seeds of varieties with contrasting resistance

The lipids of the kernels of ripe cotton seeds of varieties resistant and susceptible to verticillium wilt have been determined. Intra- and intervariety changes in these indices for the infected plants have been revealed. Different directions of the post-infection changes in the lipids according to the degree of resistance of the variety to wilt have been shown. Differences have been observed both in healthy and in infected plants.     

Effect of infection withVerticillium dahliae on the bound and strongly bound lipids of cotton seeds of varieties with contrasting resistance

The lipids of the kernels of ripe cotton seeds of varieties resistant and susceptible to verticillium wilt have been determined. Intra- and intervariety changes in these indices for the infected plants have been revealed. Different directions of the post-infection changes in the lipids according to the degree of resistance of the variety to wilt have been shown. Differences have been observed both in healthy and in infected plants.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan, Tashkent, fax (3712) 89 14 75. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 609–612, September–October, 1994.     

Quantitative determination of neutral lipids on chromarods

Five lots of ten chromarods were spotted with 2, 4, 6, or 8 μg of cholesterol ester, cholestero, triglyceride, methyl ester and free fatty acid and then analyzed using an Iatroscan. Rod-to-rod and lot-to-lot differences in the detector response were evident n the data. The standard deviation for the rod within lot response appeared to increase linearly as the amount of lipid applied was increased. The logarithms of the detector response data were analysed statistically to determine the relative magnitude of the rod-to-rod and lot-to-lot variances. When methyl ester was used as an internal standard or as a covariate, the variation from rod to rod and lot to lot was much smaller than in the original analysis.     

Diol lipids XV. Isolation of a neutral diol plasmalogen from the lipids of starfish

Chemistry of Natural Compounds -     

Isolation of hemigossypol quinone from a cotton plant infected with wilt

Summary From the stems of the cotton plant infected with the fungusVerticillium dahliae Kleb. has been isolated a quinone derivative of hemigossypol — hemigossypolone — for which the structure 8-formyl-6,7-dihydroxy-5-isopropyl-3-methyl-1,4-naphthoquinone is proposed, and its fungitoxicity has been determined.Division of Bioorganic Chemistry of the Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 341–344, May–June, 1977.     

Composition of the neutral lipids of Chlorella vulgaris

Summary The qualitative and quantitative compositions of the neutral lipids and the fatty-acid composition of the individual classes of neutral lipids isolated from fresh, freeze-dried, and air-dry cells of the algaChlorella vulgaris have been investigated.The presence of natural fatty acid methyl esters in the lipid extract of the fresh and air-dry chlorella cells has been established.It has been shown that the fatty acid methyl ester fraction is enriched with palmitic acid as compared with the triglyceride and free fatty acid fractions.The main unsaturated acids of the chlorella lipids contain the first double bond in the ⁹ position.Division of Microbiology of the Academy of Sciences of the Uzbek SSR, Tashkent. Institute of the Chemistry of Plant Substances, Academy of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 49–53, January–February, 1978.     

Oxidized lipids of cotton-plant leaves

Free fatty acids and diacylglycerols containing them have been isolated from the leaves of a cotton plant of a wilt-resistant variety. The composition and structures of the hydroxylipids have been determined by a combination of the methods of IRS, UVS, GLC, and the mass spectrometry of TMS derivatives, and changes in the composition of the hydroxy acids taking place on artificial infection of the plant with the fungusVerticillium dahliae Kleb. have been revealed.Institute of Chemistry of Plant Substances, Uzbekistan Republic Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 31–35, January–February, 1992.     

Lipid composition of the seeds of the cotton plant infected with wilt

The qualitative and quantitative set of lipid components of the seeds of healthy cotton plants of the variety Tashkent-1 and plants infected with verticillium wilt have been studied. It has been established that the compositions of the lipids of the two samples differ considerably. The greatest differences are observed in the amounts of total lipids, gossypol, and low-molecular-weight volatile acids.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 319–325, May–June, 1980.