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Roy Stephen

Publications (10)

Mitigation of Button Shedding in Coconut through Nutritional and Hormonal Interventions

D. Shanmugapriya, Roy Stephen, M. M. Viji, K. Prathapan, K. N. Anith, R. V. Manju, R. Beena & M. Siva · Journal of Scientific Research and Reports · 2026

Background: Coconut is a vital perennial tropical crop with major global and socio-economic importance, but its productivity is affected by climatic stress, nutritional deficiencies, and severe button shedding that significantly reduces yield. Button shedding varies from year to...

Open access Research Article 10.9734/jsrr/2026/v32i44135

Adaptation and Mitigation of High Temperature Stress in Tomato

Ammu Alphonsa John & Roy Stephen · International Journal of Environment and Climate Change · 2024

Tomato (Solanum lycopersicum L.) holds considerable economic significance as a vegetable crop globally, ranking second in both cultivated area and production worldwide. Optimal growth conditions for tomatoes typically fall within the temperature range of 25°C - 30°C during the da...

Open access Research Article 10.9734/ijecc/2024/v14i64231

Understanding Pollen Behaviour under High Temperature for Climate Resilient Breeding

Aisha Renju N.A & Roy Stephen · International Journal of Environment and Climate Change · 2024

Global warming raise challenges for plant reproduction as pollen development and functioning are the most heat-sensitive processes. Hence, it is crucial to understand the mechanisms and processes underlying heat-related male sterility in order to maintain food security. Elevated...

Open access Research Article 10.9734/ijecc/2024/v14i64220

Physiological Assessment of Temperature Stress Tolerance in Selectively Fertilzed Coconut Hybrids

Afna Mol O. P., Roy Stephen, Viji M. M., Vanaja T., Manju R. V. & Vishnu B. R. · International Journal of Environment and Climate Change · 2023

In vitro pollen germination study is one of the important technologies for understanding the functions of pollens as well as in many areas of pollen biotechnology particularly in pollen selection. Ability to separate germinated and non-germinated pollen offers selective treatment...

Open access Research Article 10.9734/ijecc/2023/v13i123695

Drought-adaptive Grouping of Black Pepper (Piper nigrum L.) Genotypes Using Hierarchical Clustering on Principal Components (HCPC)

Reshma, P., Sreekala, G. S., Deepa S Nair, Roy Stephen, Ameena, M. & Asha, S · Journal of Advances in Biology & Biotechnology · 2025

Aims: Application of Hierarchical Clustering on Principal Components (HCPC) to identify drought-tolerant genotypes of black pepper (Piper nigrum L.) based on important morpho-physiological characteristics. Study Design: Field observation supported by multivariate statistical anal...

Open access Research Article 10.9734/jabb/2025/v28i123430

Genetic Variability Assessment in the F2 Population of Rice Cross Uma × Nagina-22

R. L. Visakh, Seeja G., R. Beena, Roy Stephen, Sajitha Rani T., Pratheesh P. Gopinath & Mahesh Santosh Shirsat · Journal of Advances in Biology & Biotechnology · 2025

Genetic variability and its inherited components are crucial for identifying suitable breeding material and developing superior varieties. The present study was carried out at the College of Agriculture, Vellayani, Thiruvananthapuram, Kerala in the F2 population of the Uma × Nagi...

Open access Research Article 10.9734/jabb/2025/v28i123420

Synergistic Effects of Seed Inoculation with Piriformospora indica and Foliar Hormonal Application on Early Flowering in Rice Bean (Vigna umbellata) Variety Surabhi

Aiswarya Chandrahasan, Gayathri G, Seeja G., Roy Stephen, Smitha Bhasi & Kavya Suresh S S · Journal of Advances in Biology & Biotechnology · 2024

This study aimed to evaluate the effectiveness of seed inoculation with Piriformospora indica and various foliar hormonal treatments in promoting early flowering in fodder rice bean (Vigna umbellata Thunb.), variety Surabhi, conducted at the College of Agriculture, Vellayani. The...

Open access Research Article 10.9734/jabb/2024/v27i111679

Hydroponic Cultivation of Spices and Aromatics: Techniques, Benefits and Challenges

Shanila, Sreekala G. S., Deepa S. Nair, Roy Stephen & Pratheesh P. Gopinath · International Journal of Environment and Climate Change · 2024

The global shift towards urbanization, with 55% of the population residing in urban areas and an anticipated rise to 68% by 2050, presents challenges to traditional farming. The increasing world population, further intensifies the strain on available agricultural land due to urba...

Open access Research Article 10.9734/ijecc/2024/v14i114542

Assessment of Nutrient Status in the Cassava Growing Tracts of Southern Laterites (Agro Ecological Unit 8), Kerala, India

R. A. Aparna, G. Rajasree, P. Shalini Pillai, Sheeba Rebecca Isaac, Roy Stephen, B. Aparna & Pratheesh P. Gopinath · International Journal of Environment and Climate Change · 2023

As part of the study, a survey was conducted to identify the soil fertility constraints of cassava growing tracts of AEU 8, Thiruvananthapuram, which is one of the major cassava growing regions of the State of Kerala in peninsular India. The method of sampling of the survey was r...

Open access Research Article 10.9734/ijecc/2023/v13i113509

Molecular Frameworks of Nitrogen Response in Plants: A Review

Elizabeth Jose, Soni K. B., Swapna Alex, Shalini Pillai P., Beena R. & Roy Stephen · International Journal of Environment and Climate Change · 2023

Nitrogen is a crucial element for all living organisms especially plants which rely on substantial nitrogen quantities to sustain their growth and productivity. Crop production is greatly influenced by nitrogen consumption efficiency and a significant amount of nitrogen fertilize...

Open access Research Article 10.9734/ijecc/2023/v13i123694