Showing papers in "Phytochemistry in 2006"

TL;DR: The more recent reports on polyphenol oxidase in plants and fungi are reviewed and many details about structure and probably function of PPO have been revealed, but some of the basic questions raised over the years remain to be answered.

TL;DR: The biological activities reported of preparations from Ganoderma are remarkable and given most emphasis herein as distinct from structure/activity information.

TL;DR: The underlying molecular phenomena of the RSA of flavonoids could be explained by the ease of hydrogen atom abstraction and the ease-of- termination of the flavonoidal aroxyl radicals.

TL;DR: Early empirical work on glucosinolate degradation along with more recent aspects related to current research on mechanism of glucosInolate degradation in plants, microbes and animals are highlighted.

TL;DR: This review highlights results from what the authors believe to be some of the most clinically significant recent studies and describes current developments in the stereoselective total synthesis of EGCG.

TL;DR: DGDG accumulated under P-deprivation in M. subterraneus, did not resemble PC and the positional distribution of its fatty acids was not altered, preserving the C20/C16 structure of its molecular species and it is suggested that under phosphate starvation DGTS is a likely source of C20 acyl groups that can be exported to the sn-1 position of DGDG and can partially compensate for the decrease in PE.

TL;DR: How seed anatomy, light, and plant-to-plant variation influence the content and measurement of oil in Arabidopsis seeds is described to establish a reference data set on the fatty acid composition and distribution of mass and oil between tissues of Arabdopsis seeds that should help to predict the applicability of results obtained withArabidopsis to other oilseeds.

TL;DR: This review aims to summarize the present knowledge of catalytic roles of AdoMet in plant metabolism.

TL;DR: To provide a comprehensive chemical profile of bacterial volatiles emitted from these biologically active strains, headspace solid phase microextraction (SPME) coupled with software extraction of overlapping GC-separated components was employed.

TL;DR: Both glucosinolate content and gene expression data indicate that salicylate and ethylene signaling repress some jasmonate-mediated responses to herbivory.

TL;DR: Diterpene resin acids are a significant component of conifer oleoresin, which is a viscous mixture of terpenoids present constitutively or inducibly upon herbivore or pathogen attack and comprises one form of chemical resistance to such attacks.

TL;DR: An emerging group of proteins found in many plant pathogens are related to their ability to cause plant cell death and may act as positive virulence factors, accelerating disease and pathogen growth in plant hosts.

TL;DR: Comparison between wild-type and a knockout mutant pldalpha1 (locus ID: AT3G15730) provides insight into the metabolic function of phospholipase D (PLD) in different organs, suggesting a role for PLDalpha1 in membrane lipid degradation in seeds.

TL;DR: In this article, a GC-MS analysis of essential oils of Iranian Mentha piperita and Myrtus communis extracted by hydrodistillation lead to identification of 26 and 32 compounds, respectively.

TL;DR: The present review describes the chemistry and biological activity of several compounds isolated from different species of Iranian Euphorbia: diterpenoid with myrsinane skeletons, flavonoids, tannins, alkanes, sterols, mono-, sesqui- and triterpenoids, skin-irritating and tumor-promoting latexes and their active ingenol diter penoids.

TL;DR: The antimicrobial activity of the oil showed significant inhibitory activity against the fungi, Candida glabrata, C. albicans and Aspergillus niger and the bacteria Bacillus subtilis and Pseudomonas aeruginosa, and no activity was observed against the fungus Fusarium oxysporum.

TL;DR: In castor bean DGAT2 is more likely to play a major role in seed TAG biosynthesis than DGAT1, and expresses 18-fold more highly expressed in seeds than in leaves and shows temporal specific expression during seed development.

TL;DR: This study is the first to compare the changes that occur in pollen of a single species after collection by honeybees, and found fatty acids comprised a higher proportion of total lipid than in bee-collected and stored pollen.

TL;DR: SmWE and F3 were selective inhibitors of herpes simplex virus type 1 and type 2 in Vero cells, with antiviral effective concentration 50% (EC50) values in the range 0.63-10.0 microg/ml.

TL;DR: It is shown here that the CmCCD1 gene product cleaves carotenoids at positions 9,10 and 9',10', generating geranylacetone from phytoene; pseudoionone from lycopene; beta-ionOne from beta-carotene, as well as alpha-ionone and pseudoion one from delta- carotene.

TL;DR: Comparative DNA sequence/chemotaxonomic phylogenetic trees showed that the chemical characters of the investigated species were able to generate essentially the same phylogenetic relationships as the DNA sequences, which supports the contention that chemical characters can be used effectively to identify relationships between plant species.

TL;DR: Given the significant antibiotic activity of the labdane-related diterpenoid phytoalexins from rice, and the presence of similar secondary metabolism throughout the cereal crop plant family, study of this type of biosynthesis will continue to be an area of active investigation.

TL;DR: Because of its restricted occurrence and its abundance in K. pinnata, flavonoid (2) may be a chemical marker for this plant species of high therapeutic potential.

TL;DR: The objective of this study is to determine the changes brought about by germination on water soluble feruloyl arabinoxylans (feraxans), one of the major components of soluble fibre from rice and ragi and their consequence on antioxidant activity.

TL;DR: Advances in understanding L. sativus from the perspective of its taxonomy, genetics, ecology, chemistry, nutrition, medicine, biology and for animal nutrition are addressed.

TL;DR: The results suggest that soybean and A. thaliana seeds are deficient in their metabolic capacity to selectively catalyze the flux of conjugated fatty acids from their site of synthesis on PC to storage in TAG.

TL;DR: Dissection and analysis of mature Brassica seeds showed that the trihydroxy C18:1 fatty acid was found mainly in the embryo, while ferulate, fatty alcohols and C22 and C24 species were specific to the seed coat plus endosperm.

TL;DR: Coumarins in the mutants obtained from the SALK Institute collection that carried a T-DNA insertion within the gene encoding the cytochrome P450, CYP98A3, which catalyzes 3'-hydroxylation of p-coumarate units in the phenylpropanoid pathway were analyzed and the content of scopoletin and scopolin in the mutant roots greatly decreased to approximately 3% of that in the wild-type roots.

TL;DR: Based on the data, it is concluded that tocotrienols may be transiently present in photosynthetically active tissues, however, it remains to be proven whether the tocotrianols are biosynthesised in such tissues, or imported from elsewhere in the plant.

TL;DR: The results of this research include the development of a method that is both fast and highly sensitive in the simultaneous quantitation of SA and JA from crude cucumber plant extracts, avoiding any purification and derivatization steps.