Molecular and metabolic traits of some Egyptian species of Cassia L. and Senna Mill (Fabaceae-Caesalpinioideae)

DNA barcoding, micromorphology and metabolic traits of selected Ficus L. (Moraceae) species from Egypt

The genus Ficus of the family Moraceae, is one of the largest genera of angiosperms, with diverse pharmaceutical applications and biological activities. The traditional approaches based on the morphological traits have been frequently implemented for taxonomical identification of the different taxa of Ficus, however, encompassing these features are quite laborious, due to the dependence of these phenotypic traits on the environmental conditions. So, authenticating the taxonomical identity of the Ficus taxa with molecular barcoding and metabolic profiling, as relatively stable traits, could be a relevant approach for confirming the traditional phenotypic traits of this genus. Nine species of the genus Ficus namely F. amplissima Sm., F. benjamina L. F. binnendijkii, F. drupacea var. pubescens, F. elastica Roxb., F. microcarpa L., F. religiosa L., F. tinctoria subsp. gibbosa and F. virens var. sublancelata in Egypt, were selected for this study. From the anatomical features, three species of subsection Urostigma, F. religiosa, F. virens var. sublanceolata have cystoliths on the abaxial layer, whereas in F. amplissima it was on the adaxial layer. The UPGMA dendrogram of the studied Ficus taxa has been generated from the 21 anatomical characters, categorized the studied taxa into two clusters (I and II) of average distance ~ 3.5, each cluster has been further divided into subclusters I and II. The sub-cluster I includes F. religiosa, F. virens var. sublanceolata and F. tinctoria subsp. gibbosa were grouped together to subsection Urostigma, while the sub-cluster II of the cluster I includes F. benjamina and F. amplissima. From the DNA barcoding analysis, three clusters I, II and III were emerged, the cluster I includes F. benjamina, F. binnendjikee, and F. amplissima. The cluster II, F. virens var. sublanceolata and F. religiosa that belong to subsection Urostigma, while, the cluster III includes F. elastica and F. drupacea var. pubescens, F. microcarpa that belongs to subsection Conosycea. From the metabolic profiling of Ficus species, the major compounds; H-cycloprop-azulen-7-ol, 3,7,11,15-Tetramethyl-2-hexadecen-1-ol, 2-(9-octadecenyloxy), pentadecanoic acid, phytol, sitosterol and 9,12-octadecadienoic acid were the common among the taxa, with an obvious fluctuation, that could be a chemotaxonomic markers for these species of Ficus. Based on the metabolic profiling, two distinct clusters I and II were evolved, the cluster I involve F. elastica, F. benjamina, F. drupacea var. pubescens, F. amplissima, while, the cluster II had F. tinctoria subsp. gibbosa and F. religiosa. The fluctuation on the metabolites of the tested Ficus species could be a metabolic fingerprint for each species. So, the delamination of the tested plants based on their anatomical traits was typically matched to the separation based on the ITS sequence analysis.

Phytochemical and metabolic profiling of the different Podocarpus species in Egypt: Potential antimicrobial and antiproliferative activities

Podocarpus is the most dominant genus of Podocarpaceae, with higher taxonomical proximity to the Taxaceae, having numerous pharmaceutical applications, however, scarce studies dealing with the physiological and metabolic criteria of Podocarpus in Egypt were reported. Thus, the objective of this work was to assess the physiological and metabolical patterns of the different species of Podocarpus; P. gracilior, P. elongates, P. macrophyllus and P. neriifolius. The highest terpenoids contents were reported in P. neriifolius, followed by P. elongatus, and P. macrophyllus. P. gracilior had the highest antioxidants amount, followed by P. macrophyllus, P. neriifolius and P. elongatus. From the GC/MS metabolic profiling, caryophyllene, β-cadinene, β-cuvebene, vitispirane, β-cadinene and amorphene were the most dominant metabolites in P. gracilior. β-Caryophyllene was the common in P. gracilior, P. elongatus, P. macrophyllus and P. neriifolius with an obvious fluctuation. The plant methanolic extracts have an obvious activity against the multidrug resistant bacteria; E. coli, P. aeruginosa, S. pyogenes and S. aureus, and fungi; A. fumigatus, A. flavus, A. niger and C. albicans in a concentration-dependent manner. The highest Taxol yield was assessed in the extracts of P. elongatus (16.4 μg/gdw), followed by P. macrophyllus, and P. neriifolius. The chemical identity of Taxol derived from P. elongatus was resolved by LC/MS, with molecular mass 854.6 m/z, and similar structural fragmentation pattern of the authentic one. The highest antitumor activity of P. elongatus extracted Taxol was assessed towards HCT-116 (30.2 μg/ml), HepG-2 (53.7 μg/ml) and MCF-7 (71.8 μg/ml). The ITS sequence of P. elongatus "as potent Taxol producer" was deposited on Genbank with accession #ON540734.1, that is the first record of Podocarpus species on Genbank.

Distinguishing features of Lycium L. species (family Solanaceae) distributed in Egypt based on their anatomical, metabolic, molecular, and ecological characteristics

Among the 70-80 species of the genus Lycium (family Solanaceae) disjunctly distributed around the world, only three are frequently distributed in different locations in Egypt. Due to the morphological similarities between these three species, there is a need for alternative tools to distinguish them. Thus, the objective of this study was to revise the taxonomic features of Lycium europaeum L., Lycium shawii Roem. & Schult., and Lycium schweinfurthii var. aschersonii (Dammer) Feinbrun in consideration of their anatomical, metabolic, molecular, and ecological characteristics. In addition to analysis of their anatomical and ecological features, DNA barcoding was performed for molecular characterization through internal transcribed spacer (ITS) sequencing and start codon targeted (SCoT) markers. Furthermore, metabolic profiling of the studied species was conducted based on gas chromatography-mass spectrometry (GC-MS). The observed anatomical features of the adaxial and abaxial epidermal layers, type of mesophyll, crystals, number of palisade and spongy layers, and the vascular system showed variations between the studied species. Beyond this, the anatomy of the leaves showed an isobilateral structure in the studied species, without distinct differences. Species were molecularly identified in terms of ITS sequences and SCoT markers. The ITS sequences were deposited in GenBank with accession numbers ON149839.1, OP597546.1, and ON521125.1 for L. europaeum L., L. shawii, and L. schweinfurthii var. aschersonii, respectively. The sequences showed variations in GC content between the studied species; this was 63.6% in L. europaeum, 61.53% in L. shawii, and 63.55% in L. schweinfurthii var. aschersonii. A total of 62 amplified fragments, including 44 polymorphic fragments with a ratio of 70.97%, were obtained in the SCoT analysis, as well as unique amplicons in L. europaeum L., shawii, and L. schweinfurthii var. aschersonii of 5, 11, and 4 fragments, respectively. Through GC-MS profiling, 38 compounds were identified with clear fluctuations in the extracts of each species. Of these, 23 were distinguishing chemicals that could help in chemical identification of the extracts of the studied species. The present study succeeds in identifying alternative clear and diverse characteristics that can be used to distinguish between L. europaeum, L. shawii, and L. schweinfurthii var. aschersonii.