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Anil Kumar C.,Tropical Botanic Garden and Research Institute TBGRI | Bindu S.,Tropical Botanic Garden and Research Institute TBGRI | Chitra C.R.,Tropical Botanic Garden and Research Institute TBGRI | Mathew P.J.,Tropical Botanic Garden and Research Institute TBGRI
Rheedea | Year: 2011

Morphological characters of fruits and seeds of all the fi ve Rauvolfia species, viz., R. hookeri, R. micrantha, R. serpentina, R. tetraphylla and R. verticillata, occurring in South India were analysed. Comparative study revealed that the species can be delimited based on fruit/seed characters and an artificial key is provided for the same.


Santhosh Kumar E.S.,Tropical Botanic Garden and Research Institute TBGRI | Roy P.E.,Tropical Botanic Garden and Research Institute TBGRI | Renjith N.B.,Tropical Botanic Garden and Research Institute TBGRI | Dan M.,Tropical Botanic Garden and Research Institute TBGRI
Rheedea | Year: 2011

Acrotrema unifl orum Hook. var. unifl orum, a Sri Lankan endemic is reported for the fi rst time for India from Pathanamthitta district of Kerala, southern Western Ghats. It is apparently similar to A. arnottianum Wight, an endemic species of the southern Western Ghats, but can easily be distinguished from the latter by its shortpeduncled infl orescence, less number of stamens and green juvenile leaves. It is described here with photographs to facilitate easy identifi cation.


PubMed | Tropical Botanic Garden And Research Institute Tbgri
Type: Journal Article | Journal: Ancient science of life | Year: 2012

Oral administration of Trichopus zeylanicus to mice (0.5 ml of 2% water suspension / mouse) for 7 consecutive days markedly increased the number of thymocytes splenic lymphocytes, total blood leucocytes and peritoneal macrophages without any effect on Haemoglobin content and body weight. This increase in the proliferation of lymphocytes and macrophages could be one of the mechanism of T.zeylanicus induced immunomodulation. Treatment with T. zeylanicus protected mice from tumour cell growth when challenged with 0.5 million of EAC ascetic tumour cells / mouse. Studies on the gastrointestinal function of this drug showed that the drug slightly reduced intestinal motility as judged from charcoal movement.


Shareef S.M.,Tropical Botanic Garden and Research Institute TBGRI | Kumary M.P.G.,Tropical Botanic Garden and Research Institute TBGRI | Kumar E.S.S.,Tropical Botanic Garden and Research Institute TBGRI | Shaju T.,Tropical Botanic Garden and Research Institute TBGRI
Rheedea | Year: 2010

Syzygium daviflorum (Roxb.) Wall. ex A.M. Cowan et Cowan, a Myrtaceous tree species is reported for the first time for South India from Agasthyamalai Biosphere Reserve of the southern Western Ghats. A brief description and illustration of the species are provided herewith for easy identification.


Jabbar M.A.,Tropical Botanic Garden and Research Institute TBGRI | Krishnaraj M.V.,Tropical Botanic Garden and Research Institute TBGRI | Mohanan N.,Tropical Botanic Garden and Research Institute TBGRI
Rheedea | Year: 2010

Crotalaria incana L. subsp. purpurascens (Lam.) Milne-Redh. (Fabaceae), hitherto known only from Africa is reported here for the first time from India. Detailed description with illustration is provided.


PubMed | Tropical Botanic Garden and Research Institute TBGRI
Type: Journal Article | Journal: International journal of impotence research | Year: 2013

Nitric oxide (NO) is known to have roles in several crucial biological functions including vasodilation and penile erection. There are neuronal, endothelial and inducible NO synthases that influence the levels of NO in tissues and blood. NO activates guanylate cyclase and thereby increases the levels of cyclic GMP (cGMP). Viagra (sildenafil), a top selling drug in the world for erectile dysfunction, inhibits phosphodiesterase-5, which hydrolyses cGMP to GMP. Thus, it fosters an NO-mediated increase in the levels of cGMP, which mediates erectile function. Here, we show the aphrodisiac activity of a novel chemical isolate from the flowers of an epiphytic orchid, Vanda tessellata (Roxb.) ex Don, which activates neuronal and endothelial, but not inducible, NO synthases. The aphrodisiac activity is caused by an increase in the level of NO in corpus cavernosum. The drug increases blood levels of NO as early as 30 min after oral administration. The active compound was isolated by column chromatography. Based on the spectral data, the active compound is found to be a new compound, 2,7,7-tri methyl bicyclo [2.2.1] heptane. We anticipate that our findings could lead to the development of a commercially viable and valuable drug for erectile dysfunction.

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