A study of the structure of lignins of healthy and wilt-affected cotton plants of the variety Tashkent-1

Continuing a study of the dioxiane lignins of healthy and wilt-affected cotton plants of variety Tashkent-1 (DLCT) according to vegetation period, we have performed nitrobenzene oxidation and cleavage with sodium in liquid ammonia of the natural and isolated dioxane lignins. It has been established that in the wilt-affected samples of cotton-plant stems the amount of guaiacyl and syringyl structural units increases.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 392–396, May–June, 1979.     

Aminomethylation of dioxane lignins of healthy and wilt-diseased cotton plants of the variety Tashkent-1

The products of the aminomethylation of dioxane lignins of healthy and wilt-diseased plants of variety Tashkent-1 according to the vegetation periods (ADLKhT-1-VII) have been studied. It has been established that the dioxane lignins of the wilt-diseased cotton-plant stems are less condensed. Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 704–706, September–October, 1980.     

An investigation of the structure of the phospholipids of the cotton plant of variety Tashkent-2

Summary 1. The fatty-acid compositions of the total phospholipids of the seed kernels of the cotton plant of variety Tashkent-2, after the elimination of carbohydrates, and of their main components have been studied.2. It has been found that at 37–38°C the time of enzymatic hydrolysis is considerably shortened.3. A study of the products of acid and enzymatic hydrolysis has shown the structure of the individual phospholipids.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 145–148, March–April, 1976.     

Oxytriglycerides of the seed oil of the Tashkent-1 variety of cotton plant

Summary Mono (hydroxyperoxy) octadecadienoyldiacyl triglycerides have been isolated from the seed oil of the cotton plant Tashkent-1, their amount in the oil being about 3%. It has been established that the hydroperoxyoctadecadienoyl radical is localized mainly in the position of the oxy-TGs. On the basis of the fatty-acid composition and the results of enzymatic hydrolysis, the proportions of the 15 possible types of oxytriglycerides have been calculated.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 433–437, July–August, 1978.     

Oxy acids of the seed oil of the cotton plant of variety Tashkent-1

Summary Seven oxy acids have been isolated from cottonseed oil of variety Tashkent-1 for the first time and their structures have been shown: cis-12,13-epoxyoctadec-cis-9-enoic, cis-9,10-epoxyoctadec-cis-12-enoic, cis-9,10-epoxyoctadecanoic, 9,10:12,13-diepoxyoctadecanoic, 9-hydroxyoctadeca-trans,cis-10,12-dienoic, 13-hydroxyoctadeca-cis,trans-9,11-dienoic, and 11-hydroxyoctadeca-cis,trans (trans,cis)-9,12-dienoic (unstable).Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 710–716, November–December, 1976.     

Phospholipids of the seeds of the healthy and the wilt-affected cotton plant

A comparative study has been made of the phospholipid complexes of the seeds of a healthy cotton plant of the variety Tashkent-1 and one attacked by verticillium wilt. Some differences have been found in the amounts of the components of the total phospholipids and in the distribution of the fatty acids in the individual fractions of the phospholipids of the healthy and wilt-affected plants.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 325–327, May–June, 1980.     

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.     

Change in the structural elements of cotton-plant lignins in the various vegetation periods

Summary 1. The dioxane lignins of the cottonplant of various vegetation periods have been studied, and it has been shown that the lignin changes in the course of the development of the plant: the amount of methoxy groups increases and the amount of phenolic hydroxy groups decreases.2. Gel chromatography of the lignins has shown that they are all polydisperse with a predominance of the high-molecular-weight fraction.3. The 3,4-diethoxybenzaldehyde detected in the products of the alkaline nitrobenzene oxidation of dioxane lignin of the early vegetation period after its ethylation with diethyl sulfate is a direct proof of the presence of catechol structural units in cotton-plant lignin.4. A quantitative determination of the catechol structures in the lignins of the cottonplant has shown that their amount decreases as the plant develops.5. By decomposing the lignins with sodium and liquid ammonia, the presence in them of guaiacyl, syringyl, and p-coumaryl structural units has been confirmed and it has been shown that the lignin becomes less condensed as the plant grows, which is apparently connected with an increase in the degree of its methoxylation.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 100–107, January–February, 1977.     

Phospholipids of the cotton plant of variety Tashkent-3. II. Structure of the main phospholipid fractions

1. Individual fractions of phosphatidylcholines, phosphatidylethanolamines, phosphatidylinositols, and the X₂ and X₃ phospholipids have been obtained from the combined phospholipids, freed from carbohydrates, of the seed kernels of the cotton plant of variety Tashkent-3. 2. The compositions and position distributions of the fatty acids in the main fractions of phospholipids have been studied.     

Phospholipids of the cotton plant of variety Tashkent-3. II. Structure of the main phospholipid fractions

Summary 1. Individual fractions of phosphatidylcholines, phosphatidylethanolamines, phosphatidylinositols, and the X₂ and X₃ phospholipids have been obtained from the combined phospholipids, freed from carbohydrates, of the seed kernels of the cotton plant of variety Tashkent-3.2. The compositions and position distributions of the fatty acids in the main fractions of phospholipids have been studied.3. The possible molecular composition of the phosphatidylcholines, phosphatidylethanolamines, and phosphatidylinositols have been calculated.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 155–158, March–April, 1976.     

Minor phospholipids of the seeds of the cotton plant of variety “Tashkent-2” structure of the N-acyllysophosphatidylethanolamine

Summary The minor phospholipids from the seeds of the cotton plant of variety Tashkent-2 have been isolated and studied. It has been established that the FA's attached to the N atom are more saturated than the corresponding O-acyls. For the N-acyllsyo-PE the structure of a 2-acylglycerophosphoryl-N-acylethanolamine has been proposed. As in the main fractions, in the minor components of the phospholipids of the seeds of the cotton plant of variety Tashkent-2 the saturated fatty acids mainly occupy position 2.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedininii, No. 1, pp. 41–44, January–February, 1978.     

Study of the phospholipids of various organs of Crambe amabilis according to the vegetation periods

Summary The changes in the fatty-acid and fractional compositions of the phospholipid complexes of various organs ofCrambe amabilis have been studied according to the vegetation periods.It has been established that throughout the vegetation period phospholipids are present in all organs, and at the stage of complete ripeness of the seeds they are almost wholly localized in the seeds. In the process of the development of the plant considerable qualitative and quantitative changes take place in the fractional and fatty-acid compositions of the phospholipids obtained from various organs of the plant.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 53–57, January–February, 1978.