A laboratory colony of Coleomegilla maculata (DeGeer), ye, selected for a pigmentation deficiency, was restored to near wild type cuticle coloration by adding crushed heads and wings of the red colored parental strain...A laboratory colony of Coleomegilla maculata (DeGeer), ye, selected for a pigmentation deficiency, was restored to near wild type cuticle coloration by adding crushed heads and wings of the red colored parental strain to the diet. While the wings and other colored portions of the cuticle re-gained the red color, the eyes of the pigmentation deficient insects were not changed from the pale mutant form. Plant derived carotenes lycopene and beta-carotene did not restore the mutant beetles to a visibly distinguishable red color. An additional pigmentation deficient mutant strain, gold, partially recovered red cuticle color when provided with diet containing pigmented insect particles. This work represents the first rescue of a color phenotype in a lady beetle.展开更多
A laboratory colony of <i>Coleomegilla maculata</i> (DeGeer), ye, selected for a pigmentation deficiency, was restored to near wild type cuticle coloration by adding crushed heads and wings of the red colo...A laboratory colony of <i>Coleomegilla maculata</i> (DeGeer), ye, selected for a pigmentation deficiency, was restored to near wild type cuticle coloration by adding crushed heads and wings of the red colored parental strain to the diet. While the wings and other colored portions of the cuticle re-gained the red color, the eyes of the pigmentation deficient insects were not changed from the pale mutant form. Plant derived carotenes lycopene and beta-carotene did not restore the mutant beetles to a visibly distinguishable red color. An additional pigmentation deficient mutant strain, gold, partially recovered red cuticle color when provided with diet containing pigmented insect particles. This work represents the first rescue of a color phenotype in a lady beetle.展开更多
An attempt was made to isolate yeast strains from different sources (flowers, trees exudates, fruits and cheese) which have a fast growth rate and high content of carotenoids. Seventy cultures of pigmented yeast were ...An attempt was made to isolate yeast strains from different sources (flowers, trees exudates, fruits and cheese) which have a fast growth rate and high content of carotenoids. Seventy cultures of pigmented yeast were isolated. Forty six yeast isolates were selected and identified by simplified identification method which showed that all isolates belong to Rhodotorula glutinis. These isolates were screened in two steps. Seventeen promising isolates of Rhodotorula glutinis were selected after the primary screening. Then 6 yeast isolates were chosen and passed through the second screening. The most promising isolate (isolated from pin cushion flower, Scabiosa atropurpurea) was selected according to its total carotenoids content expressed as torulene (μg?g–1 and μg?L–1). This isolate was reclassified using a number of morphological, biochemical, and physiological characteristics which revealed that the yeast isolate agree well with those of Rhodotorula glutinis Var. glutinis. Dry biomass, amount and proportion of individual carotenoids and lipid content of the selected identified yeast were determined.展开更多
Pigmented potato cultivars were ranked by a consumer panel for overall acceptance, and acceptance of aroma, appearance, and flavor. Potatoes were analyzed for total phenolics, anthocyanins and carotenoids. Concentrati...Pigmented potato cultivars were ranked by a consumer panel for overall acceptance, and acceptance of aroma, appearance, and flavor. Potatoes were analyzed for total phenolics, anthocyanins and carotenoids. Concentrations of total phenolics in yellow and purple potato cultivars were 2-fold greater (P P展开更多
This article reviewed the advance in aquatic animal pigmentation, including theory and practice of pigmentation. Color plays a very important role in determining quality and price of cultured fish, shrimp and other aq...This article reviewed the advance in aquatic animal pigmentation, including theory and practice of pigmentation. Color plays a very important role in determining quality and price of cultured fish, shrimp and other aquatic animals. The beautiful color of red, orange, yellow is due to a group of pigments named carotenoids, which could not be obtained from de novo synthesis by these animals, but directly from diets. Astaxanthin and lutein are main pigments existing in aquatic animals, so adding such carotenoids in artificial diets is an important way to improve the color of skin and flesh. On the basis of where astaxanthin is biosynthesized, aquatic animals could be divided into 3 types, red carp type, sea bream type and prawn type. For prawn type, including prawn, crab, lobster and other crustaceans in which astaxanthin is the main carotenoid, color could be improved by feeding [WTBZ]β-carotene, astaxanthin, canthaxanthin, zeaxanthin and lutein, but astaxanthin and canthaxanthin are more effective. For red carp type, including red carp, goldfish, fancy red carp and most freshwater fishes, astaxanthin, canthaxanthin, zeaxanthin and lutein could be fed, but only astaxanthin, canthaxanthin could be fed to the third type including sea bream and salmonids, and the adding level of these pigments is about 50-100 mg·kg -1. There are 2 kinds of pigments could be used in aquatic feeds, carotenoids additives and natural feedstuffs rich in carotenoids, such as green alga, yeast Phaffia rhodozyma, and shrimp waste. Many factors affect the pigmentation of aquatic animals, which includes the species, size and physiological situation of animals, diets composition, source and kinds of pigments. Other factors such as feeding rate, water temperature, and brightness also play some roles in color formation of aquatic animals. So, attention must be paid to satisfy pigmentation for aquatic animals. Compared with Western countries, the research and use of aquatic animals pigmentation in China are late and superficial, but develop rapidly in recent years. In the future, more attention should be paid to metabolism, regulation and affecting factors of pigmentation based on characteristics of cultured conditions, species and feedstuffs, to promote pigmentation theory and practice of aquatic animals in China.展开更多
文摘A laboratory colony of Coleomegilla maculata (DeGeer), ye, selected for a pigmentation deficiency, was restored to near wild type cuticle coloration by adding crushed heads and wings of the red colored parental strain to the diet. While the wings and other colored portions of the cuticle re-gained the red color, the eyes of the pigmentation deficient insects were not changed from the pale mutant form. Plant derived carotenes lycopene and beta-carotene did not restore the mutant beetles to a visibly distinguishable red color. An additional pigmentation deficient mutant strain, gold, partially recovered red cuticle color when provided with diet containing pigmented insect particles. This work represents the first rescue of a color phenotype in a lady beetle.
文摘A laboratory colony of <i>Coleomegilla maculata</i> (DeGeer), ye, selected for a pigmentation deficiency, was restored to near wild type cuticle coloration by adding crushed heads and wings of the red colored parental strain to the diet. While the wings and other colored portions of the cuticle re-gained the red color, the eyes of the pigmentation deficient insects were not changed from the pale mutant form. Plant derived carotenes lycopene and beta-carotene did not restore the mutant beetles to a visibly distinguishable red color. An additional pigmentation deficient mutant strain, gold, partially recovered red cuticle color when provided with diet containing pigmented insect particles. This work represents the first rescue of a color phenotype in a lady beetle.
文摘An attempt was made to isolate yeast strains from different sources (flowers, trees exudates, fruits and cheese) which have a fast growth rate and high content of carotenoids. Seventy cultures of pigmented yeast were isolated. Forty six yeast isolates were selected and identified by simplified identification method which showed that all isolates belong to Rhodotorula glutinis. These isolates were screened in two steps. Seventeen promising isolates of Rhodotorula glutinis were selected after the primary screening. Then 6 yeast isolates were chosen and passed through the second screening. The most promising isolate (isolated from pin cushion flower, Scabiosa atropurpurea) was selected according to its total carotenoids content expressed as torulene (μg?g–1 and μg?L–1). This isolate was reclassified using a number of morphological, biochemical, and physiological characteristics which revealed that the yeast isolate agree well with those of Rhodotorula glutinis Var. glutinis. Dry biomass, amount and proportion of individual carotenoids and lipid content of the selected identified yeast were determined.
文摘Pigmented potato cultivars were ranked by a consumer panel for overall acceptance, and acceptance of aroma, appearance, and flavor. Potatoes were analyzed for total phenolics, anthocyanins and carotenoids. Concentrations of total phenolics in yellow and purple potato cultivars were 2-fold greater (P P
文摘This article reviewed the advance in aquatic animal pigmentation, including theory and practice of pigmentation. Color plays a very important role in determining quality and price of cultured fish, shrimp and other aquatic animals. The beautiful color of red, orange, yellow is due to a group of pigments named carotenoids, which could not be obtained from de novo synthesis by these animals, but directly from diets. Astaxanthin and lutein are main pigments existing in aquatic animals, so adding such carotenoids in artificial diets is an important way to improve the color of skin and flesh. On the basis of where astaxanthin is biosynthesized, aquatic animals could be divided into 3 types, red carp type, sea bream type and prawn type. For prawn type, including prawn, crab, lobster and other crustaceans in which astaxanthin is the main carotenoid, color could be improved by feeding [WTBZ]β-carotene, astaxanthin, canthaxanthin, zeaxanthin and lutein, but astaxanthin and canthaxanthin are more effective. For red carp type, including red carp, goldfish, fancy red carp and most freshwater fishes, astaxanthin, canthaxanthin, zeaxanthin and lutein could be fed, but only astaxanthin, canthaxanthin could be fed to the third type including sea bream and salmonids, and the adding level of these pigments is about 50-100 mg·kg -1. There are 2 kinds of pigments could be used in aquatic feeds, carotenoids additives and natural feedstuffs rich in carotenoids, such as green alga, yeast Phaffia rhodozyma, and shrimp waste. Many factors affect the pigmentation of aquatic animals, which includes the species, size and physiological situation of animals, diets composition, source and kinds of pigments. Other factors such as feeding rate, water temperature, and brightness also play some roles in color formation of aquatic animals. So, attention must be paid to satisfy pigmentation for aquatic animals. Compared with Western countries, the research and use of aquatic animals pigmentation in China are late and superficial, but develop rapidly in recent years. In the future, more attention should be paid to metabolism, regulation and affecting factors of pigmentation based on characteristics of cultured conditions, species and feedstuffs, to promote pigmentation theory and practice of aquatic animals in China.
