MOLECULAR ASSESSMENT OF GENETIC DIVERSITY IN INDIAN ACCESSIONS OF ALOE VERA USING SSR MARKER

Objective: In this study Aloe vera (L.) Burm. f. collected from 12 states covering all the different agro-climatic zones of India were investigated for its genetic diversity analysis by using SSR marker assay.Methods: Total genomic DNA was isolated from young leaf samples using CTAB method. Twenty primers were selected which were used for Asparagus officinalis L a related species of A. vera and others were developed from available Aloe vera plant sequences with the help of primer 3 software. Similarity matrices and dendrogram were constructed by using NTSys software to show a phenetic representation of the genetic relationship. Polymorphic Information Content (PIC), the effective multiplex ratio (EMR) and Marker Index (MI) were calculated for the assessment of genetic diversity.Results: The neighbor-joining tree based on all SSR fragments of twelve Aloe vera germplasm accessions grouped into three major clusters. The similarity value ranged from 46 % to 100 %. The highest 100 % similarity was noted between Haryana and Uttar Pradesh accessions followed by 93% similarity between Haryana and Punjab accessions with Rajasthan. Minimum similarity was noted between Gujarat and Kerala accessions.Conclusion: This study revealed the rich genetic diversity among Aloe vera accessions from different agro-climatic zones of India. It is also concluded that SSR marker analysis can be a useful tool for the assessment of genetic diversity of the medicinal plants.Â

Data from: Spatial and seasonal influences on culturable endophytic mycobiota associated with different tissues of Eugenia jambolana Lam. and their antibacterial activity against MDR strains

Background: Present study focuses on diversity and distribution analysis of endophytic fungi associated with different tissues of Eugenia jambolana. The influence of season and geographical location on diversity and distribution of endophytic fungi has been analyzed. Antibacterial activity of isolated fungal species has also been investigated against MDR bacterial strains. Result: A total of 1896 endophytic fungal isolates were obtained from healthy, surface sterilized tissues of leaf, stem and petiole tissues during summer, monsoon and winter season. Out of 24 fungal species isolated, 20 species belong to class Ascomycetes, 2 to Basidiomycetes and 2 to Zygomycetes. Maximum species diversity was in rainy season whereas colonization frequency was in winter. All the diversity indices showed maximum species diversity at site 5 (Yamunanager), rainy among the seasons and leaf among the tissues studied. Aspergillus genus was most frequently isolated. Aspergillus niger and Alternaria alternata were most dominant species. Three way ANOVA results showed that effect of season was highly significant on species diversity in relation to sites and tissues. 60% endophytic fungal extracts showed significant antibacterial activity against one or more than one MDR bacterial strain. Conclusion: Different fungal species were recovered from different sites but the inter-site comparisons were not significant according to Jaccard similarity coefficient. Diversity of such fungal endophytes indicates that Eugenia jambolana plant acts as an ecosystem facilitating survival of many microbes with impressive antibacterial potential

VALIDATION AND TRANSFERABILITY OF SIMPLE SEQUENCE REPEATS (SSR'S) FROM SOME SPECIES OF ACACIA GENUS TO ACACIA NILOTICA L.

Objective: In present study genetic transferability of SSR's from related Acacia species to Acacia nilotica was evaluated along with its genetic diversity analysis from north Indian region. Methods: A total of 30 primers selected from 5 different Acacia species were screened for amplification and polymorphism. Dendrogram and 2 D Plot were constructed using NTSys PC version 2.02e. Different diversity parameters like Polymorphism information content (PIC), alleles per primer, number (no.) of amplicons were also calculated for each primer pair.Results: SSRs from Acacia tortilis, A. senegal and A. koa were highly transferable in A. nilotica. Out of 30, only twenty-two primers showed amplification with an average of 1.36 alleles per locus. Polymorphic information content (PIC) values ranged from 0.5 to 0.96 with an average of 0.81. Jaccard similarity coefficient (J) values ranged from 0.04 to 0.67 showing a high level of diversity. Un-weighted pair group method with arithmetic mean (UPGMA), based cluster analysis, divided all accessions into three main clusters.Conclusion: Geographical and climatic conditions showed a great impact on genetic diversity. The results indicated high transferability of genomic resources from related species and will facilitate more studies to characterize the relatively less studied Acacia niloticagenome.Â

Antiplasmodial potential and quantification of aloin and aloe-emodin in Aloe vera collected from different climatic regions of India

Abstract Background In this study, Aloe vera samples were collected from different climatic regions of India. Quantitative HPTLC (high performance thin layer chromatography) analysis of important anthraquinones aloin and aloe-emodin and antiplasmodial activity of crude aqueous extracts was done to estimate the effects of these constituents on antiplasmodial potential of the plant. Methods HPTLC system equipped with a sample applicator Linomat V with CAMAG sample syringe, twin rough plate development chamber (20 x 10 cm), TLC Scanner 3 and integration software WINCATS 1.4.8 was used for analysis of aloin and aloe-emodin amount. The antiplasmodial activity of plant extracts was assessed against a chloroquine (CQ) sensitive strain of P. falciparum (MRC-2). Minimum Inhibitory Concentration (MIC) of aqueous extracts of selected samples was determined according to the World Health Organization (WHO) recommended method that was based on assessing the inhibition of schizont maturation in a 96-well microtitre plate. EC (effective concentration) values of different samples were observed to predict antiplasmodial potential of the plant in terms of their climatic zones. Results A maximum quantity of aloin and aloe-emodin i.e. 0.45 and 0.27 mg/g respectively was observed from the 12 samples of Aloe vera. The inhibited parasite growth with EC50 values ranging from 0.289 to 1056 μg/ml. The antiplasmodial EC50 value of positive control Chloroquine was observed 0.034 μg/ml and EC50 values showed by aloin and aloe-emodin was 67 μg/ml and 22 μg/ml respectively. A positive correlation was reported between aloin and aloe-emodin. Antiplasmodial activity was increased with increase in the concentration of aloin and aloe-emodin. The quantity of aloin and aloe-emodin was decreased with rise in temperature hence it was negatively correlated with temperature. Conclusions The extracts of Aloe vera collected from colder climatic regions showed good antiplasmodial activity and also showed the presence of higher amount of aloin and aloe-emodin in comparison to collected from warmer climatic sites. Study showed significant correlation between quantities of both the anthraquinones used as marker compounds and EC50 values of the different Aloe vera extracts. Although, both the anthraquinones showed less antiplasmodial potential in comparison to crude extracts of different Aloe vera samples. Diverse climatic factors affect the quantity of tested compounds and antiplasmodial potential of the plant in different Aloe vera samples

Phylogenic analysis of endophytic fungi isolated from the leaf, stem and petiole of E. jambolana.

Phylogenic analysis of endophytic fungi isolated from 3 different tissues the leaf, stem and petiole of E. jambolana. The phylogenic tree was constructed using Neighbor- Joining method. Bootstrap values above 50% from 1000 replicates are indicated at each node

Additional file 1: Figure S1. of Spatial and seasonal influences on culturable endophytic mycobiota associated with different tissues of Eugenia jambolana Lam. and their antibacterial activity against MDR strains

Shows the details of microscopic image of endophytic fungi isolated from Eugenia jambolana. Figure S2. shows the details of antibacterial activity of endophytic fungal crude extracts against MDR bacterial strains. (DOC 2803 kb

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