Thomson Davis

Chemical profiling of Piper nigrum accessions from the southern Western Ghats in India with discovery of piperine-rich elite genotypes

Thomson Davis, Rajani Kurup Sukumaryamma Remadevi, Paravanparampil Jacob Mathew, Sabulal Baby

Piper nigrum (black pepper), a globally significant spice and medicinal crop, has its primary centre of origin in the Western Ghats of India. Despite extensive agronomic studies, direct chemical assessment of piperine variability in its wild accessions remains limited. In this study, …

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Physiological Responses of Elite Black Pepper (Piper nigrum L.) Genotypes to Phytophthora Foot Rot Disease: Insights from Chlorophyll Fluorescence and Gas Exchange

Devika J. Das, B. R. Nair, Thomson Davis, M. A. Jabbar

Abstract Phytophthora foot rot, caused by Phytophthora capsici, remains a significant challenge in the cultivation of black pepper (Piper nigrum L.) worldwide. In this study, we analyzed the impact of P. capsici infection on photosynthetic efficiency and gas exchange in six elite …

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Data from: Direct integration of population genetics and dynamic species distribution modelling improves predictions of post-glacial history of Piper nigrum

Sandeep Sen, Michael Peter Nobis, Rani M.S. Saggere, Srirama Ramanujam et autres

Climate change strongly influences species distributions and population genetic structure, but independent analyses of these factors often yield uncertain conclusions. To address this, we developed an integrative framework combining population genetics and dynamic species distribution modelling (DSDM) to reconstruct the post-glacial history …

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Author response for "Direct Integration of Population Genetics and Dynamic Species Distribution Modelling Improves Predictions of Post‐Glacial History of Piper nigrum "

Sandeep Sen, Michael Peter Nobis, Rani M.S. Saggere, Ramanujam Srirama et autres

Significance of ploidy on par with genotypic specificity in host resistance for Phytophthora in Black pepper (Piper nigrum L.)

Mathew Paravanparampil Jacob, Thomson Davis, M. Abdul Jabbar

Abstract We estimated Disease Severity Indices (DSI) of 22 genotypes of Black pepper by subjecting them to screening against Phytophthora capsici for assessing the influence of ploidy as well as genotype in host resistance. The DSI of the genotypes showed significant variation …

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Origin and evolution of the genus Piper in Peninsular India

Sandeep Sen, Selvadurai Dayanandan, Thomson Davis, R. Ganesan et autres

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Rediscovery of Robert Wight’s Tephrosia fusca (Fabaceae: Papilionoideae) from India

MOOTHEDATHU VENUGOPALAN NAIR KRISHNARAJ, NARAYANAN NAIR MOHANAN, Thomson Davis

Tephrosia fusca is rediscovered from southern part of Western Ghats, India, after 178 years. The complete description ofthe species is provided along with illustrations. A lectotype is also designated.

Validating Clitoria annua var. sekharii (Fabaceae: Clitoriinae)

MOOTHEDATHU VENUGOPALAN NAIR KRISHNARAJ, NARAYANAN NAIR MOHANAN, Thomson Davis, J. Abraham

Almeida (1998) published the name Clitoria annua var. sekharii M. R. Almeida & N. Chaturv. with a diagnosis in English, but not in Latin. For new names to be validly published between 1935–2011, a Latin description or diagnosis is required (Art. 36.1, …

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