scholarly journals Seed Borne Endophytic Fungi Associated with Some Indigenous Rice Varieties of North East India and Their Growth Promotion and Antifungal Potential

2020 ◽  
Author(s):  
Subham Roy ◽  
Chiranjib Mili ◽  
Rajreepa Talukdar ◽  
Sudem Wary ◽  
Kumanand Tayung
Keyword(s):  
Antifungal Activity ◽  
Bioactive Compounds ◽  
Endophytic Fungi ◽  
Magnaporthe Grisea ◽  
Crop Improvement ◽  
Future Research ◽  
Rice Varieties ◽  
North East India ◽  
North East ◽  
Indigenous Rice Varieties

Background: Seed borne endophytic fungi play an important role in seed germination and plant health. There are ubiquitous and have been found associated in every plant species investigated so far. They colonize plant seeds without causing any disease and are often vertically transmitted. Despite their occurrence, seed borne endophytic fungi are poorly investigated and their role for application in agriculture is still to be elucidated. Methods: In the present study endophytic fungi associated with seeds of some indigenous rice varieties of North East, India was investigated. The isolates were determined for IAA activity in-vitro and antifungal activity against rice pathogen, Magnaporthe grisea. Crude metabolites obtained from potent isolates were characterized by GCMS analysis to reveal the presence of bioactive compounds. Result: Our result indicated that commonly isolated fungal genera were Aspergillus, Fusarium, Gliocladium, Mucor, Penicillium, Bipolaris, Basidiobolus and Mycelia sterilia. Amongst them, colonization frequency (CF %) of Fusarium (8.8%) was found to be highest and was isolated from seeds of almost all the varieties. It was observed that four isolates of Fusarium showed good IAA production in the medium amended with tryptophan. The isolates also displayed antifungal activity against Magnaporthe grisea. GCMS analysis of the metabolites indicated presence of several bioactive compounds. The study suggests that seed borne endophytes can be explored as bio-inoculants for crop improvement in future research program. 

scholarly journals A study of the effect of Paclitaxel, Docetaxel and Tamoxifen citrate coumpounds found in Taxus wallichiana on the Beta-tubulin and Estrogen Receptor (ESR) proteins in humans using a bioinformatics approach

2019 ◽  
pp. 103-114
Author(s):  
Bikash Thakuria ◽  
Devatrisha Purkayastha ◽  
Samrat Adhikari
Keyword(s):  
Estrogen Receptor ◽  
Bioactive Compounds ◽  
Active Form ◽  
Docking Studies ◽  
North East India ◽  
North East ◽  
Tamoxifen Citrate ◽  
Protein Receptors ◽  
Cancerous Cells ◽  
Taxus Wallichiana

Taxus wallichiana, an indigenous plant of North East India contains bioactive compounds such as Tamoxifen citrate and taxol (paclitaxel and docetaxel) which inhibit the growth of cancerous cells. Tamoxifen citrate in its active form competitively inhibits the binding of estradiol or estrogen with estrogen receptor and results in tumor suppression whereas the taxol compounds stabilize the tubulin protein in microtubules and inhibit cell division in cancerous cells. In this approach, important domains and motifs of the protein receptors were studied and analyzed followed by homology modeling and its validation. Molecular docking studies were carried out via tubulin and estrogen receptor with paclitaxel, docetaxel, and endoxifen (an active form of tamoxifen citrate). Hence it was verified that tubulin and estrogen receptor contain binding sites for the bioactive compounds found in T. wallichiana and these bioactive compounds after binding with these receptors result in the prevention of the proliferation of the tumorous cells by stabilizing the microtubules and preventing the intake of steroidal hormones by cells respectively.

scholarly journals Karyotype analysis of Solanum torvum Sw. - an ethnobotanical Solanaceous species of Tripura, North East India

2018 ◽  
Vol 5 (4) ◽  
pp. 191-195
Author(s):  
H. Reshmi Singha ◽  
Bipul Das Chowdhury ◽  
Sangram Sinha ◽  
Rabindra Kumar Sinha
Keyword(s):  
Karyotype Analysis ◽  
Crop Improvement ◽  
Somatic Chromosome Number ◽  
Solanum Torvum ◽  
North East India ◽  
North East ◽  
Solanaceous Plant ◽  
Improvement Programme ◽  
Karyotype Formula ◽  
Secondary Constrictions

Solanum torvum Sw. is a wild Solanaceous plant species, commonly used by the indigenous people of Tripura. Cytological study of the species was carried out to determine the somatic chromosome number and to construct the karyotype formula. The detailed karyomorphological analysis revealed 2n=24 somatic chromosomes having haploid number n=12. The size of chromosomal complement was found to range from 2.14±0.21 to 4.02±0.26 µm with a pair of chromosomes bearing secondary constrictions. Strictly median primary constriction was recorded in two pairs of chromosomes. In general, karyotype formula was found to be A2B4C18. The detailed karyotype analysis revealed that chromosomes are generally small in size and fall under the Stebbins category of “2A” indicating symmetrical nature of the karyotype. The present study could be utilised in understanding the cytogenetic nature of the species and for future crop improvement programme.

scholarly journals Morpho-physiological analysis of tolerance to aluminum toxicity in rice varieties of North East India

PLoS ONE ◽  
2017 ◽  
Vol 12 (4) ◽  
pp. e0176357 ◽  
Author(s):  
Jay Prakash Awasthi ◽  
Bedabrata Saha ◽  
Preetom Regon ◽  
Smita Sahoo ◽  
Umakanta Chowra ◽  
...  
Keyword(s):  
Aluminum Toxicity ◽  
Rice Varieties ◽  
North East India ◽  
North East ◽  
Physiological Analysis

Past Verses Present; Metamorphosis in Different Spheres of Guwahati: A Study of Srutimala Duara’s Mindprints of Guwahati

2020 ◽  
Vol 8 (2) ◽  
pp. 13
Author(s):  
Ankita Pandey
Keyword(s):  
Point Of View ◽  
Areca Nut ◽  
Medieval Period ◽  
River Bank ◽  
North East India ◽  
North East ◽  
The North ◽  
Indian State ◽  
The City ◽  
Beautiful City

Guwahati derives its name from the Assamese word “Guwa” means areca nut and “Haat” means market. However, the modern Guwahati had been known as the ancient Pragjyotishpura and was the capital of Assam under the Kamrupa kingdom. A beautiful city Guwahati is situated on the south bank of the river Bramhaputra. Moreover, It is known as the largest city in the Indian state of Assam and also the largest metropolis in North East India. It has also its importance as the gateway to the North- East India. Assamese and English are the spoken languages in Guwahati.  In 1667, the Mogul forces were defeated in the battle by the Ahom forces commanded by Lachut Barphukan. Thus, in a sense Guwahati became the bone of contention among the Ahoms, Kochas and the Moguls during the medieval period.  Guwahati the administrative headquarters of Lower Assam with a viceroy or Barbhukan was made by the Ahom king.  Since 1972 it has been the capital of Assam. The present paper will discuss the changes happened in Guwahati over the period of late 1970s till the present time. It will focus on the behavior of people, transformed temples, Panbazar of the city, river bank of Bramhaputra, old Fancy Bazaar, chaotic ways, festivals and seasons including a fifth man made season etc. It will also deal how over the years a city endowed with nature’s gifts and scenic views, has been changing as “a dirty city”. Furthermore, it will also present the insurgencies that have barged into the city. The occurrence of changes will be discussed through the perspective and point of view of Srutimala Duara as presented in her book Mindprints of Guwahati.

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