AMBIKA

@srmist.edu.in

Assistant professor/Seed Science and Technology
SRM Agricultural Sciences

AMBIKA


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https://researchid.co/ambikasingaram

RESEARCH, TEACHING, or OTHER INTERESTS

Agricultural and Biological Sciences, Agronomy and Crop Science
17

Scopus Publications

604

Scholar Citations

10

Scholar h-index

11

Scholar i10-index

Scopus Publications

  • Unravelling the Role of Phytohormones against Heat Stress in Maize
    V. Manonmani, V. Revathy, S. Ambika, R. Paramasivam, S. Kavitha, M. Nivethitha, M. Umanath
    Indian Journal of Agricultural Research, 2025
    Background: Drought stress is a significant challenge for maize production, causing significant harm to crop growth and yield. In this experiment two set of pot culture experiment was conducted with three replication to assess the effect of phytohormone foliar spray on maize COH(M) 8. Methods: This experiment study was conducted at the Seed Science and Technology, TNAU in the summer season during 2022 and 2023, respectively. One set of potted plants were kept under ambient temperature (34±2°C). Another set of potted plants were raised at elevated temperature of 42°C in the Open Top Chamber. The plants were sprayed with sodium nitroprusside (50 ìM and 75 ìM), brassinolides (0.2 ppm and 0.5 ppm) and salicylic acid (50 ppm and 75 ppm) at 40 and 47 days after sowing along with control. Result: Foliar spraying with sodium nitroprusside 50 ìM and salicylic acid 75 ppm recorded higher plant height, early flowering, pollen viability, chlorophyll content and enzyme activities (catalase, peroxidase and superoxide dismutase) compared to the control plants. As a result, these findings suggest that use of sodium nitroprusside 50 ìM enhances plant defence mechanisms against heat stress in maize.
  • EFFECT OF CRYO-STORAGE ON STORABILITY OF PAPAYA SEEDS
    S. Kavitha, G Subhigha, S Manonmani, J. Renugadevi, S Ambika, et al.
    Journal of Animal and Plant Sciences, 2024
    A fruit crop of significant economic importance, papayas are often propagated from seeds. Based on their freezing injury even at low moisture content, papaya seeds are classified as "intermediate seeds"; and rapid loss of viability in storage is assumed to be the primary cause of poor germination; thus, the development of appropriate technology is necessary to prolong the storability of papaya seeds. One such effective technology for prolonged seed storability is cryo-storage. The purpose of the current study was to investigate how cryostorage affects papaya seed storability. For this investigation, TNAU Papaya variety CO 8 seeds were utilised. Five distinct treatments were applied to the seeds, which were then kept for approximately six months at liquid nitrogen's vapour phase (-140°C). The biochemical parameters such as protein content, free amino acid, total carbohydrates, free sugars, total lipids, and dehydrogenase activity were measured on a monthly basis along with seed germination and seedling vigour in the cryopreserved papaya seeds. Results indicated that papaya seeds that had been vitrified (seeds with a 10% moisture content that had been soaked in loading solution for 20 minutes, then immersed in Plant Vitrification Solution 2 (PVS2) for another 20 minutes, packed in cryovials and kept in cryo-storage at -140°C) compared to papaya seeds that were packed in cloth bags and stored in ambient conditions had higher seed germination, dry matter production and vigour index at six months after storage. In comparison to fresh seeds, the results also showed that, after six months of cryo-storage, biochemical proximate, protein content, total carbohydrate content, total lipid content, and dehydrogenase activity were maintained in the aforementioned treatment with minimum reduction, while electrical conductivity, free amino acid content, and free sugar content gradually increased with the storage period at minimum rate. In crux, vitrified papaya seeds packaged in cryovials and kept in cryo-storage at -140°C preserved their quality for six months, meeting Indian Minimum Seed Certification Standards. This could be useful for storing papaya seeds for longer periods of time. Keywords: Papaya, vitrification, differential scanning calorimetry, liquid nitrogen, cryo-storage
  • Comparison of Near Nano Size and Commercial Grade Botanicals with Shaking and without Shaking on Seed Quality Attributes of Soybean (Glycine max L.) cv. CO 3 Seeds
    S. Lakshmi, S. Ambika, S. Kavitha
    Legume Research, 2024
    Background: Soybean is important oil seed crop. Poor seed germination is a major constraint for increasing the productivity of soybean. Seed quality enhancement will enhance the germination. Treating the seeds with chemicals may cause harmful effects to ecosystems and also to human beings. Using botanicals for seed treatment is safe. The present study was taken with a view to assess the seed quality of soybean by using different botanicals treatments (ball milled and commercial grade) along with shaking and without shaking. Methods: Experiment was conducted to evaluate the effect of seed treatment with different ball milled botanicals and commercial grade along with shaking (60 min) and without shaking of soybean seeds on quality attributes. Botanical powders of fenugreek (Trigonella foenum-graecum L.) seed, leafs of ashwagandha (Withania somnifera), tea (Camellia sinensis) and noni (Morinda citrifolia) were ball milled for 1 h to bring into near nano size and treated with seeds @ 2 g kg-1 for 60 min. Without ball milling was served as commercial grade. Among these two methods (commercial grade and near nano size) highest values were observed in seeds treated with near nano size powder. Generally shaking of seeds with botanicals was performed better than without shaking. Result: In this experiment, botanical fenugreek seed powder perfrmed well. In interaction, soybean seeds treated with near nano size fenugreek seed powder @ 2 g kg-1 with shaking of 60 min showed highest seed quality parameters. The per cent increase over control for germination, shoot length, root length, dry matter production and vigour index were 17.8, 27.7, 43.9, 47.6 and 45.3%, respectively.
  • Performance of polymer-coated cotton seeds under various moisture stress conditions
    V. Manonmani, S. Ambika, R. Paramasivam, K. Mohanraj, S. Laksmi, S. Kavitha, V. Vijaya Geetha, S. Deepika
    Journal of Applied Biology and Biotechnology, 2024
    Cotton is an important fiber crop in the world and it is mainly cultivated in dryland conditions. Due to climate change, drought is occurs frequently. Even though cotton is cultivated in dryland conditions it is sensitive to drought from germination to harvest. Akshay 65 F1Bt cotton seeds polymer coated with Arcus, Myconate, Genius coat 171, Quick roots, and Genius coat 172 were grown in the field of the Department of Seed Science and Technology, Tamil Nadu Agricultural University (TNAU), Coimbatore, to evaluate the impact of polymers on the physiological parameters under various moisture stress conditions in addition to normal irrigation. Moisture stress was created during the 50% flowering stage, boll initiation stage
  • Antifungal Properties of Selected Seaweed and Seagrass Extracts against Macrophomina phaseolina Infecting Pigeon Pea
    G. Somasundaram,, R. Paramasivam, H.A. Archana,, K. Sujatha, S. Ambika
    Legume Research, 2023
    A study was conducted to evaluate in vitro efficacy of seaweed (Sargassum myriocystum and Sargassum wightii) and seagrass (Cymodocea serrulata and Syringodium isoetifolium) extract against the mycelial growth of Macrophomina phaseolina at different concentrations of 5, 10, 15 and 20% along with control by poison food technique. The result revealed that, the extract of S. wightii (20%) exhibited the highest suppression of mycelial growth (10, 25 and 38 mm) at 24, 48 and 72 h after incubation. Among the antagonists tested against Macrophomina phaseolina, the fungal Trichoderma viride was found to be the most effective in reducing mycelial growth than the bacterial antagonist Pseudomonas fluorescens. Both the antagonistic fungi and bacteria have compatibility with seaweed and seagrass extracts in the concentrations.
  • Designer seed for enhancement of yield in cotton
    K. Sujatha, S. Ambika
    Indian Journal of Agricultural Research, 2020
    Field experiments were carried out at Agricultural Research Station, Vaigai Dam, to identify the performance of designer seed on yield of cotton. Seeds fortified with KCl 1% for 6 h followed by polymer coating @ 3ml/ kg + Carbendazim @ 2 g/kg + imidachloprid @ 2 ml/kg + Tichoderma viride @ 4 g/kg + Azospirilum @ 40 g /kg. The effect was more beneficial through increased field emergence (86%) population at maturity/plot (57.34), number of sympodial branches (13.62), number of. bolls/ plant (64.50), kapas yield/plant (71.02 g), kapas yield/plot (2.43 kg) and seed yield/ plant (43.72 g) compared to untreated control (73%, 48, 12.04, 50.99, 59.67 g, 1.93 kg and 37.9 g, respectively for field emergence, population at maturity/plot, number of sympodial branches, number of. bolls/ plant, kapas yield/plant (g), kapas yield/plot (kg) and seed yield/ plant (g)) . Days to 50% flowering and pest and disease incidences (%) were higher in untreated control compared to control. The per cent decrease over control was 12.5 and 52.4%, respectively for days to 50 % flowering and pest and disease.
  • Seed priming treatments on seedling quality of henna (Lawsonia inermis L.) seeds
    S. Ambika, K. Sujatha, K. Balakrishnan
    Acta Horticulturae, 2019
  • Pre-sowing seed treatments in sarpagandha (Rauwolfia serpentina L. Benth.) seeds to improve germination
    K. Sujatha, S. Ambika, S. Lakshmi, K. Balakrishnan
    Acta Horticulturae, 2019
  • Germination and vigour of polymer coated cotton seeds under different water holding capacities
    V. Manonmani, S. Ambika, S. Deepika, M. Bhaskaran
    Journal of Applied and Natural Science, 2019
    The cotton seeds were coated with different polymers namely Genius coat 171, Genius coat 172, Arcus, Myconate and Quick roots and evaluated for various physiological quality parameters at water holding capacities of 30, 40, 50, 60, 70 and 80 per cent in sand medium along with untreated control seed. The seeds coated with Quick roots polymer recorded higher speed of germination (8.5), germination (88 %), root length (10.35 cm), shoot length (10.80 cm), dry matter production (489.9 mg seedlings-10) and vigour index (1861), respectively over untreated control (5.5, 68, 9.00, 9.50, 458.6 and 1258, respectively) under suboptimal moisture condition like 30 per cent water holding capacity. Cotton seeds coated with Quick roots can tolerate both high as well as low moisture content and produce better germination and seedling establishment.
  • Changes of enzymes activities in botanical treated aged seed of soybean (Glycine max (l.) merrill) cv. CO3 seeds
    Hridya V. Rejeendran, S. Lakshmi, S. Ambika
    Legume Research, 2018
    Changes occurring in seed during aging are very significant for determining seed quality, i.e. seed longevity. An experiment was conducted in Department of Seed Science and Technology, TNAU, Coimbatore to standardize suitable seed dry dressing treatments, using near nano size botanicals that can alleviate the deleterious effect of accelerated ageing and to improve the enzyme activities of soybean aged seeds. Five days aged seeds were treated with 1 h ball milled fenugreek seed powder, leaf powders of ashwagandha, tea and noni @ 2 g kg-1 with 60 min. shaking and evaluated for enzyme activities and field emergence (naturally and artificially aged seeds). Among the treatments seeds treated with fenugreek seed powder has the highest dehydrogenase activity (OD 10 min-1), protein (%), oil content (%), catalase activity, peroxidase activity (OD 10 min-1) (µg H2O2 mg-1min-1) with minimum values of electrical conductivity (dSm-1), free fatty acid (%), lipid peroxidation (OD value), lipoxygenase activity (g mol s-1 mg-1). Field emergence (%) was also higher in fenugreek seed powder treated seeds (2 g kg-1 with 60 min).
  • Dry dressing of soybean [Glycine max (L.) merrill] cv. CO 3 seeds with near nano size botanicals to improve physiological performance during storage
    V. R. Hridya, S. Lakshmi, S. Ambika
    Legume Research, 2017
  • Spacing, fertilizer and foliar spray influence on yield attributing characters of Tephrosia (Tephrosia purpurea. L)
    Ecology Environment and Conservation, 2017
  • Influence of polymer coated KSL 441 (op) soybean seed on productivity under moisture stress conditions
    S. Ambika, V. Manonmani, M. Bhaskaran, S. Deepika
    Legume Research, 2017
  • Organic seaweed nano powder effect on growth and yield attributes of pigeonpea
    Legume Research, 2017
  • Designer seed for enhancement of yield in black gram (Vigna mungo L.)
    K. Sujatha, S. Ambika
    Indian Journal of Agricultural Research, 2016
  • Comparative studies on brown, red and green alga seaweed extracts for their antifungal activity against fusarium oxysporum f.Sp. udum in pigeon pea var. co (rg)7 (cajanus cajan (l.) mills.)
    Journal of Biopesticides, 2014
  • Review on effect of seed size on seedling vigour and seed yield
    S. Ambika, V. Manonmani, G. Somasundar
    Research Journal of Seed Science, 2014

RECENT SCHOLAR PUBLICATIONS

  • Role of Agricultural Credit in Enhancement of Paddy Productivity and Farm Income in India
    U Malaiarasan, R Paramasivam, S Ambika, V Saravanakumar
    Agricultural Economics Research Review 38 (1), 81-91 , 2025
    2025
  • Pharmacological potential of seaweed derived bioactive compounds: Applications for next generation crop improvement
    K Sujatha, S Ambika, K Senthil, P Mahalakshmi, R Elamparithi, ...
    Annals of Phytomedicine 14 (2), 284-296 , 2025
    2025
  • Mechanisms of Seed Dormancy and Advanced Approaches to Germination Enhancement
    V Deepika, S Ambika
    FUNDAMENTALS AND ADVANCES IN HORTICULTURE, 27 , 2025
    2025
  • Unravelling the Role of Phytohormones against Heat Stress in Maize
    MU V. Manonmani, V. Revathy, S. Ambika, R. Paramasivam, S. Kavitha, M ...
    Indian Journal of Agricultural Research , 2024
    2024
    Citations: 4
  • EFFECT OF CRYO-STORAGE ON STORABILITY OF PAPAYA SEEDS.
    S Kavitha, G Subhiga, S Manonmani, J Renugadevi, S Ambika, S Laksmi, ...
    JAPS: Journal of Animal & Plant Sciences 34 (4) , 2024
    2024
  • Comparison of Near Nano Size and Commercial Grade Botanicals with Shaking and without Shaking on Seed Quality Attributes of Soybean (Glycine max L.) cv. CO 3 Seeds.
    S Lakshmi, S Ambika, S Kavitha
    Legume Research: An International Journal 47 (4) , 2024
    2024
  • Phytochemical Analysis Through GC‐MS in Mimosa pudica
    J Srinivasan, LR Anand, G Poochandiran, T Aravinthan, NT Sankar, ...
    Journal of Innovative Agriculture 11 (1), 12-17 , 2024
    2024
    Citations: 1
  • Artificial Intelligence in Food Industry
    A Priyanka, P Sheela, HA Archana, S Ambika
    AgroScience Today 5 (2), 0754-0758 , 2024
    2024
  • Standardization of drying methods for improved seed quality of groundnut and sesame seeds Padronização de métodos de secagem para melhoria da qualidade de sementes de amendoim …
    VV Geetha, K Parameswari, AT Hemavathy, S Ambika, S Kavitha
    Brazilian Journal of Development 10 (4), 01-15 , 2024
    2024
    Citations: 4
  • Performance of polymer-coated cotton seeds under various moisture stress conditions
    SD V. Manonmani1 , S. Ambika2 * , R. Paramasivam3 , K. Mohanraj4 , S ...
    Journal of Applied Biology & Biotechnology, 1-6 , 2024
    2024
  • Breaking of seed dormancy in ash gourd (Benincasa pruriens) through fruit storage and seed treatments
    RVSL D THIRUSENDURA SELVI1*, S SARASWATHY2, S AMBIKA3, K ABINAYA1, S ...
    Indian Journal of Agricultural Sciences 94 (1), 56-60 , 2024
    2024
    Citations: 3
  • CRISPR/Cas9 genome editing tool for rice crop improvement
    S Gurunathan, BR Ramadoss, A Singaram, D Arulbalachandran
    Cornous Biology 1 (1), 1-6 , 2023
    2023
    Citations: 1
  • Antifungal Properties of Selected Seaweed and Seagrass Extracts against Macrophomina phaseolina Infecting Pigeon Pea.
    G Somasundaram, R Paramasivam, HA Archana, K Sujatha, S Ambika
    Legume Research: An International Journal 46 (6) , 2023
    2023
    Citations: 1
  • Status of stem rot incidence of groundnut caused by Sclerotium rolfsii in northern eastern Karnataka
    S Ambika, S Chavan, SK Jayalakshmi, BT Raghavendra, B Rajanna
    Journal of Oilseeds Research 40, 156-161 , 2023
    2023
    Citations: 4
  • Performance of polymer-coated cotton seeds under various moisture stress conditions
    V Manonmani, S Ambika, R Paramasivam, K Mohanraj, S Laksmi, ...
    2023
    Citations: 1
  • Effect of accelerated ageing and dry dressing with botanicals on seed quality of soybean
    SLANDSA V. R. HRIDYA
    Journal of Crop and Weed 18 (3), 195-199 , 2022
    2022
  • Designer Seed for Enhancement of Yield in Cotton.
    K Sujatha, S Ambika
    Indian Journal of Agricultural Research 54 (2) , 2020
    2020
    Citations: 2
  • Germination and vigour of polymer coated cotton seeds under different water holding capacities.
    V Manonmani, S Ambika, S Deepika, M Bhaskaran
    Journal of Applied & Natural Science 11 (1), 126 , 2019
    2019
    Citations: 8
  • Changes of enzymes activities in botanical treated aged seed of soybean (Glycine max (L.) Merrill) cv. CO3 seeds
    HV Rejeendran, S Lakshmi, S Ambika
    Legume Research-An International Journal 41 (1), 73-78 , 2018
    2018
    Citations: 3
  • Designer seed treatment techniques on enhancement of yield in paddy.
    K Sujatha, S Ambika
    2018
    Citations: 6

MOST CITED SCHOLAR PUBLICATIONS

  • Review on effect of seed size on seedling vigour and seed yield
    S Ambika, V Manonmani, G Somasundaram
    Research Journal of Seed Science 7 (2), 31-38 , 2014
    2014
    Citations: 283
  • Enhancing germination and seedling vigour in cluster bean by organic priming
    S Ambika, K Balakrishnan
    Scientific Research and Essays 10 (8), 298-301 , 2015
    2015
    Citations: 56
  • Antifungal activity of aqueous and ethanol extracts of seaweeds against sugarcane red rot pathogen (Colletotrichum falcatum)
    S Ambika, K Sujatha
    Scientific Research and Essays 10 (6), 232-235 , 2015
    2015
    Citations: 44
  • Enhancing the seed germination and vigour in coarse cereals by bovine urines
    S Ambika, K Balakrishnan, K Sujatha
    Journal of Agroecology and Natural Resource Management 1 (2), 40-43 , 2014
    2014
    Citations: 24
  • Comparative studies on brown, red and green alga seaweed extracts for their antifungal activity against Fusarium oxysporum f. sp. udum in Pigeon pea var. CO (Rg) 7 (Cajanus …
    S Ambika, K Sujatha
    Journal of Biopesticides 7 (2), 167 , 2014
    2014
    Citations: 22
  • Organic seaweed nano powder effect on growth and yield attributes of pigeonpea.
    S Ambika, K Sujatha
    2017
    Citations: 20
  • Biopriming of rice seed with Phosphobacteria for enhanced germination and vigour.
    T Sivakumar, S Ambika, K Balakrishnan
    2017
    Citations: 16
  • Storability of polymer coated CORH 3 hybrid rice seeds
    S Ambika, M Bhaskaran, V Manonmani, K Vanangamudi
    2014
    Citations: 13
  • Antifungal activity of brown, red and green alga seaweed extracts against Macrophomina phaseolina (Tassi) Goid., in pigeonpea var. CO (Rg) 7.
    S Ambika, K Sujatha
    2015
    Citations: 12
  • Seed priming with Micronutrients for Quality and Yield
    S Ambika, V Manonmani, S Deepika
    Popular Kheti 2 (4), 35-37 , 2014
    2014
    Citations: 11
  • Effect of priming with seaweed extracts on germination and vigour under different water holding capacities
    S Amabika, K Sujatha
    Seaweed Res. Utiln 37, 37-44 , 2015
    2015
    Citations: 10
  • Designer seed for enhancement of yield in black gram (Vigna mungo L.)
    K Sujatha, S Ambika
    Indian Journal of Agricultural Research 50 (5), 479-482 , 2016
    2016
    Citations: 9
  • Review on effect of seed size on seedling vigour and seed yield. Res J Seed Sci 7: 31–38
    S Ambika, V Manonmani, G Somasundaram
    2014
    Citations: 9
  • Germination and vigour of polymer coated cotton seeds under different water holding capacities.
    V Manonmani, S Ambika, S Deepika, M Bhaskaran
    Journal of Applied & Natural Science 11 (1), 126 , 2019
    2019
    Citations: 8
  • Designer seed treatment techniques on enhancement of yield in paddy.
    K Sujatha, S Ambika
    2018
    Citations: 6
  • Influence of polymer coated KSL 441 (op) soybean seed on productivity under moisture stress conditions.
    S Ambika, V Manonmani, M Bhaskaran, S Deepika
    2017
    Citations: 6
  • Antifungal activity of seaweed extract against Alternaria porri in onion
    S Ambika, K Sujatha, K Balakrishnan
    National Seminar on algae for sustainable agricultural production, Madurai … , 2014
    2014
    Citations: 6
  • Influence of size grading on physiological parameters in Tephrosia (Tephrosia purpurea) MDU (KO)-1
    S Sivasubramaniam, S Ambika, M Vetrivel
    Journal of Applied and Natural Science 9 (1), 639 , 2017
    2017
    Citations: 5
  • Seed priming treatments on seedling quality of henna (Lawsonia inermis L.) seeds
    S Ambika, K Sujatha, K Balakrishnan
    III International Symposium on Underutilized Plant Species 1241, 375-380 , 2015
    2015
    Citations: 5
  • Unravelling the Role of Phytohormones against Heat Stress in Maize
    MU V. Manonmani, V. Revathy, S. Ambika, R. Paramasivam, S. Kavitha, M ...
    Indian Journal of Agricultural Research , 2024
    2024
    Citations: 4