Showing papers on "Holothuria published in 1995"
TL;DR: Dissection of the sea cucumbers Holothuria floridea and Actinopyga agassize after incubations with radiolabeled parkeol demonstrated that saponin biosynthesis occurs exclusively in the Cuvier gland.
Abstract: The triterpene precursor of saponins in sea cucumbers has been identified as parkeol [lanost-9(11)-en-3 beta-ol] [1]. Dissection of the sea cucumbers Holothuria floridea and Actinopyga agassize after incubations with radiolabeled parkeol demonstrated that saponin biosynthesis occurs exclusively in the Cuvier gland. This result was corroborated by incubating a cell-free extract of the Cuvier gland with labeled parkeol and observing transformation of the precursor to saponins.
56 citations
Journal Article•
TL;DR: Of the 26 species known under the genus Holothuria from Indian seas, 18 species have been described in detail with full synonymy, notes on habits and remarks with figures and photographs.
Abstract: In this paper earlier attempts made to revise the genus Holothuria Linnaeus, 1767 are given in detail.
Of the 26 species known under the genus Holothuria from Indian seas, 18 species have been collected by
me. These have been described in detail with full synonymy, notes on habits and remarks with figures and
photographs. Keys have been provided for all the species known from Indian seas.
9 citations
TL;DR: Gene organization and sequence features indicate that the two Holothuria genes are the equivalents of a known pair of late H2B and H4 genes which have been described in the genome of sea urchins.
Abstract: A genomic library of the sea cucumber Holothuria tubulosa was screened with human and murine histone gene hybridization probes. A recombinant phage carrying an H4 gene was isolated and sequenced. Hybridization analysis of the entire 20 kb phage insert with probes for H1, H2A, H2B and H3 histones was negative except for H2B. This solitary arrangement of the two neighbouring histone H4 and H2B genes is in contrast to the organization of ‘cleavage stage’ histone genes, which are arranged in tandem quintets of genes encoding the 5 histone classes. Gene organization and sequence features indicate that the two Holothuria genes are the equivalents of a known pair of late H2B and H4 genes which have been described in the genome of sea urchins. This result shows that the simultaneous occurrence of tandem repeats of histone gene quintets and smaller groups of structurally distinct histone gene subtypes is not unique for sea urchins, but also applies to other echinodermata, such as the sea cucumber Holothuria tubulosa.
4 citations
01 Jan 1995
TL;DR: During the 1994 winter collections, a small holothurian was collected from the rocky shore of Buleji and was attached to the green seaweed, Ulva fasciata and was not immediately noticed due to the same basic colour of the body as that of the seaweed.
Abstract: During the 1994 winter collections, a small holothurian was collected from the rocky shore of Buleji (24°50'N, 66°53'E). It was attached to the green seaweed, Ulva fasciata and was not immediately noticed due to the same basic colour of the body as that of the seaweed. For identification a microscope slide of the spicules was prepared by placing a small piece of skin on a slide and treating it with (3.5%) sodium hypo-chloride (common household bleach). The specimen was identified as Holothuria (Platyperona) difficilis Semper, 1868.
1 citations