V. Radhika

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Many plants respond to herbivory with an increased production of extrafloral nectar (EFN) and/or volatile organic compounds (VOCs) to attract predatory arthropods as an indirect defensive strategy. In this study, we tested whether these two indirect defences fit the optimal defence hypothesis (ODH), which predicts the within-plant allocation of(More)
Plants produce nectar in their flowers as a reward for their pollinators and most of our crops depend on insect pollination, but little is known on the physiological control of nectar secretion. Jasmonates are well-known for their effects on senescence, the development and opening of flowers and on plant defences such as extrafloral nectar. Their role in(More)
Ant–plant interactions often are mediated by extrafloral nectar (EFN) composition that may influence plant visitation by ants. Over a 300 km range in the Indian Western Ghats, we investigated the correlation between the EFN composition of the myrmecophytic ant-plant Humboldtia brunonis (Fabaceae) and the number and species of ants visiting EFN. EFN(More)
The main part of image processing and computer vision is Image segmentation. Image segmentation is the task of splitting a digital image into one or more regions of interest. In this paper a robust method for oil spill SAR image segmentation is explored which is already used for medical images by Bing Nan li et al. The unique FCM algorithm yields better(More)
Jasmonate-mediated regulation of VOC emission has been extensively investigated in higher plants, however, only little is known about VOC production and its regulation in ferns. Here, we investigate whether the emission of VOCs from bracken fern Pteridium aquilinum is triggered by herbivory and if so - whether it is regulated by the octadecanoid signaling(More)
Synthetic aperture radar (SAR) oil spill images are corrupted by speckle noise due to random interference of electromagnetic waves. The speckle degrades the quality of the oil spill images and makes interpretations, analysis and classifications of SAR images harder. Therefore, some speckle mitigation is necessary prior to the processing of SAR oil spill(More)
In recent times, Wireless Sensor Networks (WSNs) is extensively used in numerous applications with enormously varying requirements and uniqueness. Due to the dynamically changing topology, improving Quality of Services (QOS) in WSNs has becomes hard. WSN have several different constraints in route selection such as energy, availability, computational power,(More)
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