Hussain A.,Research Scholar in Manonmaniam Sundarnar University |
Anilkumar C.,Jawaharlal Nehru Tropical Botanic Garden and Research Institute Palode
Ecology, Environment and Conservation | Year: 2016
In a study on the population structure, dynamics and conservation of Syzygium travancoricum Gamble. an economically important and critically endangered tree of southern Western Ghats region. Three species of insects belonging to Dipteara and Coleoptera were found to be associated with this species as pests. The first one is the (oriental fruit fly) Bactrocera dorsalis (Hendel) is a very destructive pest of fruit and seed belongs to the order Diptera, the second one is a seed attacking weevil Ochyromera sp. is a very destructive pest of seeds belongs to the order Coleoptera and third one is the leaf cutting weevil Deporaus marginatus (Pascoe) belongs to the order Coleoptera which damaging the young foliage of the young plant. The adult feeding produces 'window panes' on young leaves. The first two species is very dangerous to the fruit-seed infestation. All the above three species of pests leads to the major casual factor to the untimely endangerment of the host plant in their natural habitat. Copyright © EM International.
Krishnaraj M.V.,Jawaharlal Nehru Tropical Botanic Garden and Research Institute Palode |
Mohanan N.,Jawaharlal Nehru Tropical Botanic Garden and Research Institute Palode
Webbia | Year: 2012
Kumar S.,CSIR - Central Electrochemical Research Institute |
Bajpai V.,CSIR - Central Electrochemical Research Institute |
Bajpai V.,Academy of Scientific and Innovative Research AcSIR |
Singh A.,CSIR - Central Electrochemical Research Institute |
And 6 more authors.
Analytical Methods | Year: 2015
Medicinal plants of the genus Rauwolfia (Apocynaceae) are extensively used as folk medicines worldwide. Its antihypertensive activity is well known due to the presence of monoterpene indole alkaloids (MIAs). The therapeutic potential of the herbal medicines are affected due to variation of bioactive phytoconstituents. Therefore, a rapid and validated method was developed for fingerprinting of roots and leaves of six Rauwolfia species by direct analysis in real time mass spectrometry (DART-MS). Seventeen bioactive MIAs were tentatively identified on the basis of their exact mass measurement from the intact plant parts. Furthermore, principal component analysis (PCA) was used to analyze the DART-MS data of six Rauwolfia species to identify the chemical markers. Thirteen and twenty-three chemical markers were identified from the roots and leaves which were able to discriminate among six Rauwolfia species. This method was also cross-validated for the rapid identification, authentication and quality control of Rauwolfia species. © The Royal Society of Chemistry 2015.
Screening of tricyclic quinazoline alkaloids in the alkaloidal fraction of Adhatoda beddomei and Adhatoda vasica leaves by high-performance liquid chromatography/electrospray ionization quadrupole time-of-flight tandem mass spectrometry
Singh A.,Sophisticated Analytical Instrument Facility Central Drug Research Institute |
Singh A.,Academy of Scientific and Innovative Research |
Kumar S.,Sophisticated Analytical Instrument Facility Central Drug Research Institute |
Reddy T.J.,Sophisticated Analytical Instrument Facility Central Drug Research Institute |
And 4 more authors.
Rapid Communications in Mass Spectrometry | Year: 2015
RATIONALE Adhatoda beddomei and Adhatoda vasica are popular Ayurvedic medicinal plants in India, belonging to the family Acanthaceae. Tricyclic quinazoline alkaloids are found to be the most abundant in these plants which are responsible for broad-spectrum medicinal properties. This study aims to seek identification and characterization of those alkaloids based on their fragmentation patterns. METHODS A method was developed to elucidate the main fragmentation pathways of tricyclic quinazoline alkaloids in positive ion mode using high-performance liquid chromatography coupled with electrospray ionization quadrupole time-of-flight tandem mass spectrometry (HPLC/ESI-QTOF-MS/MS). Chromatographic separation was carried on a Supelco Discovery HS C18 column (15 cm × 4.6 mm, 3 μm) with 0.1% formic acid aqueous solution and acetonitrile as a mobile phase. RESULTS In full scan mass spectra, protonated molecules were observed for all the quinazoline alkaloids. Ring cleavages of the tricyclic quinazoline moiety were observed in MS2 spectra and the characteristic ions provide valuable structural information of these alkaloids. Fragmentation pathways and fragment ion structures were proposed in two groups of quinazoline alkaloids. CONCLUSIONS The established fragmentation patterns have been successfully used to identify 23 tricyclic quinazoline alkaloids in the alkaloidal fraction of A. beddomei and A. vasica. Copyright © 2015 John Wiley & Sons, Ltd.
Shareef S.M.,Jawaharlal Nehru Tropical Botanic Garden and Research Institute Palode |
Santhosh Kumar E.S.,Jawaharlal Nehru Tropical Botanic Garden and Research Institute Palode |
Roy P.E.,Jawaharlal Nehru Tropical Botanic Garden and Research Institute Palode
Phytotaxa | Year: 2013
A new species of Syzygium, S. chemunjianum is described and illustrated from the Agasthyamala Biosphere Reserve, southern Western Ghats, Kerala, India. It is similar to S. tamilnadensis but differs from it in habit, colour and nature of blaze, shape of leaves, number of intramarginal nerves, position of inflorescence, the colour, size and shape of fruits and size of seeds. © 2013 Magnolia Press.