Showing papers on "Neoxanthin published in 1980"
TL;DR: The author has investigated the carotenoids in 4 Hepaticae and 22 Musci by means of column and thin-layer chromatography, and found the following carotENoids were found to be present: lycopene, a-carotene, p-carOTene, y- carotene epoxide, P-Carotene diepoxide, /P-cryptoxanthin, lutein, Lutein epoxide and zeaxanthin.
Abstract: The author has investigated the carotenoids in 4 Hepaticae and 22 Musci. By means of column and thin-layer chromatography, the following carot- enoids were found to be present: lycopene, a-carotene, p-carotene, y-carotene, f-carotene epoxide, P-carotene diepoxide, /P-cryptoxanthin, lutein, lutein epoxide, zeaxanthin, antheraxanthin, neoxanthin, violaxanthin, aurochrome, auroxanthin, mutatochrome, mutatoxanthin and ketocarotenoid. The carotenoids which occurred most frequently in the moss species investigated were a-carotene, P-carotene, /P-cryptoxanthin, f-carotene epoxide, lutein and ze- axanthin. The total carotenoid content ranged from 0.989 to 39.115 ag/g fresh weight. Plants belonging to the Embryophyta, commonly termed "higher plants," include bryo- phytes, pteridophytes and seed plants. Most investigations of carotenoids have dealt with lower plants, particularly algae. Fewer studies have been made on the carotenoids of higher plants, and as regards the bryophytes, in particular, there are few papers on the subject of carotenoid content (Suire, 1975). The first paper was that of Kohl (1902) who reported the presence of carotenoids in mosses without, however, giving details of the types of carotenoids found. Later, Douin (1956, 1958) in studies on Bryales, Andreales and Sphagnales found, in addition to a- and p-carotene, lutein and its derivative, lutein- 5,6-epoxide. In 1957 Freeland analyzed the carotenoid content in 5 species of bryophytes and reported finding P-cryptoxanthin, zeaxanthin, violaxanthin and neoxanthin, as well as the carotenoids discovered by Douin. Freeland drew attention to the differences in the carotenoid content of gametophytes and sporophytes. Other workers who have studied carotenoids in bryophytes are Bendz et al. (1968), Herrmann (1968), Lichtenthaler (1968), Czeczuga (1972, 1978a), Schmidt-Stohn (1977) and Karunen and Ihantola (1977). The in- vestigations of these authors have revealed the presence of auroxanthin, antheraxanthin, mutatoxanthin, lycophyll and certain ketocarotenoids in addition to the carotenoids men- tioned above. The carotenoid content of certain Hepaticae were analyzed by Strain (1958), Taylor et al. (1972) and others (see Suire, 1975).
42 citations
TL;DR: In this paper, the configurational assignment of peridinin as 3 S, 5 R, 6 R, 3′ S, 5′ R, 6′ S including ozonolytic degradation of its p -bromobenzoate to derivatives of known chirality obtained from fucoxanthin and violaxanthin is reported.
42 citations
TL;DR: A cell-free system prepared from an axenic culture of the alga Amphidinium carterae converted [ 14 C]zeaxanthin into neoxanthin and then into peridinin (62%) and diadinoxanthins (38%) as discussed by the authors.
30 citations
TL;DR: Mimulaxanthin, the main carotenoid in Lamium montanum, determination of its absolute configuration was determined by oxidative degradation to the known ketone 3 (grasshopper ketone) and by spectroscopic and chiroptical comparisons with neoxanthin this paper.
Abstract: Mimulaxanthin, the Main Carotenoid in Lamium montanum, Determination of its Absolute Configuration. Absolute Configuration of Deepoxyneoxanthin by its Correlation with Neoxanthin
The carotenoid mixture isolated from the yellow flowers of Lamium montanum PERS. (Labiatae) consists of more than 75% of carotenoids with allenic end groups. Besides 32% of neoxanthin/neochrome we isolated 44% of mimulaxanthin (1a), a very rare carotenoid so far only found in Mimulus sp. (Scrophulariaceae). Its absolute configuration was determined by oxidative degradation to the known ketone 3 (‘grasshopper ketone’) and by spectroscopic and chiroptical comparisons with neoxanthin (6). Mimulaxanthin (1a) therefore is (3S, 5R, 6R, 3′S, 5′R, 6′R)-6,7,6′,7′-tetradehydro-5,6,5′,6′-tetrahydro-β, β-carotene-3,5,3′,5′-tetraol. Deep-oxyneoxanthin, which was reisolated from Mimulus sp. is (3S, 5R, 6R, 3′R)-6,7-didehydro-6,7-dihydro-β, β-carotene-3,5,3′-triol (2), as shown by spectroscopic and chemical correlation with neoxanthin (6; de-epoxydation by BuLi/FeCl3).
21 citations
01 Jan 1980
TL;DR: The leaves of higher plants usually contain the same carotenoids: β-carotene, lutein, violaxanthin, and neoxanthin this article.
Abstract: Various extensive surveys, especially those carried out by Strain [1, 2], have revealed that the leaves of higher plants usually contain the same carotenoids: β-carotene (1.13), lutein (1.74), violaxanthin (1.58) and neoxanthin (1.47). They are occasionally accompanied by smaller amounts of α-carotene (1.12), mutatochrome [β-carotene-5,8-epoxide (1.44) [3], β-cryptoxanthin (1.60), lutein 5,6-epoxide [4] [≡isolutein [5], eloxanthin [6], taraxanthin [7]] (1.48), zeaxanthin (1.19) and antheraxanthin (1.24). For example, α-carotene was detected in only 68% of the species examined in an early survey [8]. Even more rarely have other xanthophylls been observed, such as α-cryptoxanthin [≡zeinoxanthin (4.1)] [9] in lucerne (Medicago sativa) [10]. Xanthophylls normally occur unesterified in leaves [11] but during senescence when the chloroplasts are disintegrating the xanthophylls released into the cytoplasm are esterified [12] (see Section 4.10.2).
8 citations