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Ravishankar Narayana

Ravishankar Narayana
Fernlea Flowers Ltd. · Research and Development

PhD. in Plant Biosensory Sciences

About

23
Publications
8,710
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209
Citations

Publications

Publications (23)
Article
Full-text available
The geomagnetic field (GMF) is one of the environmental stimuli that plants experience continuously on Earth; however, the actions of the GMF on plants are poorly understood. Here, we carried out a time-course microarray experiment to identify genes that are differentially regulated by the GMF in shoot and roots. We also used qPCR to validate the a...
Article
Full-text available
The Earth magnetic field (or geomagnetic field, GMF) is a natural component of our planet and variations of the GMF are perceived by plants with a still uncharacterized magnetoreceptor. The purpose of this work was to assess the effect of near null magnetic field (NNMF, ∼40 nT) on Arabidopsis thaliana Col0 root ion modulation. A time-course (from 1...
Conference Paper
The recent discovery of fall armyworm (FAW) in 2016 in Africa is considered to be a huge threat to food security in the region. Fall armyworm is a major problem for important crops such as maize and novel methods of FAW detection are needed to support surveillance and report damage. Object detection, a type of deep learning model, is a scalable tec...
Article
The geomagnetic field (GMF) is an environmental element whose instability affects plant growth and development. Despite known plant responses to GMF direction and intensity, the mechanism of magnetoreception in plants is still not known. Magnetic field variations affect many light-dependent plant processes, suggesting that the magnetoreception coul...
Article
Variations in magnetic field (MF) intensity are known to induce plant morphological and gene expression changes. In Arabidopsis thaliana Col-0, near-null magnetic field (NNMF, i.e., < 100 nT magnetic field) cause a delay in the transition to flowering, but the expression of genes involved in this response is as-yet poorly studied. Here, we showed a...
Article
Full-text available
Variations in magnetic field (MF) intensity are known to induce plant morphological and gene expression changes. In Arabidopsis thaliana Col-0, near-null magnetic field (NNMF, i.e., < 100 nT magnetic field) cause a delay in the transition to flowering, but the expression of genes involved in this response is as-yet poorly studied. Here, we showed a...
Conference Paper
Full-text available
The geomagnetic field (GMF) is a natural environmental element that is subjected to polarity and intensity changes. The magnetic field (MF) is known to directly affect plant biology, but the mechanism(s) by which plants perceive MF changes is still unclear. Photoreceptors (mainly cryptochrome) seem to play a role in this process, since MF intensity...
Article
Full-text available
Wheat is the major staple food of India and is the leading source of vegetal protein in human food, having a protein content of about 13%. India was the second largest wheat producing country in the world after China with production level of 95.85 m during the year 2014. India’s share in global wheat production was recorded at 11.78% in the year 20...
Article
Full-text available
Pyrilla perpusilla (Walker), although the pest of sugarcane rarely infest the crop of paddy. Very few reports of attack of sugarcane pyrilla in rice have been reported so far. One such incidence reported in the village Bhour pind of district Jammu in Kharif season of 2016 in hybrid variety Poonam. Although it was a localized attack and timely contr...
Data
Video Protocol that describes how to analyze the effects of geomagnetic field reversals on plants. http://www.jove.com/video/53286/geomagnetic-field-gmf-plant-evolution-investigating-effects-gmf
Article
Full-text available
One of the most stimulating observations in plant evolution is a correlation between the occurrence of geomagnetic field (GMF) reversals (or excursions) and the moment of the radiation of Angiosperms. This led to the hypothesis that alterations in GMF polarity may play a role in plant evolution. Here, we describe a method to test this hypothesis by...
Data
Full-text available
Data
Full-text available
Article
Suspension cultured cells of a blast-resistant rice genotype (Oryza sativa L. cv. Gigante Vercelli) were treated with cell wall hydrolysates prepared from the fungal pathogen Magnaporthe oryzae. As a consequence, a complex pattern of phenylalanine ammonia lyase time course specific activity levels was evident. Ion-exchange chromatographic fractiona...
Article
Full-text available
Exogenous polyamines [cadaverine (Cad), putrescine (Put), spermidine (Spd) and spermine (Spm)] elicit the production of volatiles in Lima bean (Phaseolus lunatus). Among the tested PAs, Spm induces the production of some volatile terpenoids that are known to be induced by the spider mite Tetranychus urticae. Spm treatment elicits the biosynthesis o...
Article
Full-text available
We investigated the role of polyamines (PAs) in lima bean (Phaseolus lunatus) leaves on the production of herbivorous mite (Tetranychus urticae)-induced plant volatiles that attract carnivorous natural enemies of the herbivores. To do this, we focused on the effects of the exogenous PAs [cadaverine, putrescine, spermidine and spermine (Spm)] on the...

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Projects

Projects (5)
Project
To evaluate and develop resistant varieties against yellow or Stripe rust of wheat. To standardize practices to be followed to control stripe rust in wheat.