The relationship between evoked electrical activity and stem movements in three-week old sunflowers was demonstrated. Electrical potential changes (recorded by Ag/AgCl extracellular electrodes) and time-lapse images (from a top view camera) were recorded and analyzed. A heat stimulus applied to the tip of one of the second pair of leaves evoked a variation potential, transmitted basipetally alo...

The periodically forced Brusselator model displays temporal mixed-mode and quasiperiodic oscillations, period doubling, and chaos. We explore the behavior of such media as reaction-diffusion systems for investigating spiral instabilities. Besides near-core breakup and far-field breakup resulting from unstable modes in the radial direction or Doppler-induced instability (destabilization of the c...

Hybridization in plants and animals is more common and has more complex outcomes than previously realized. Genome-wide analyses of introgression in organisms ranging from oaks to sunflowers to fruit flies show that a substantial fraction of their genomes are permeable to alleles from related species. Hybridization can lead to rapid genomic changes, including chromosomal rearrangements, genome e...

The sunflower (Helianthus annuus), which belongs to the family of Asteraceae, is a crop grown worldwide for consumption by humans and livestock. Interspecific hybridization widespread sunflowers both in wild populations commercial breeding. current dataset comprises 250 bp 76 paired-end NGS reads six interspecific hybrids (F1). aimed expand Helianthus species genomic information benefit genetic...

Microbial contamination of indoor environmental surfaces is a common source for infections. Therefore, bio-deterioration in buildings materials really important to avoid, due the negative impact on human health. Consequently, functionalized and sustainable are being intensively studied control microbial colonization. Firstly, it was possible obtain silica samples by sol-gel method with addition...

The genotoxic effects of the herbicide oxyfluorfen on root meristem cells Heianthus annuus L. (sunflower) were investigated. roots treated with 75, 150, and 300 ppm concentrations for 12 24 h. different genetic endpoints such as mitotic index (MI), chromosome aberrations (CA), micronuclei (MN) analyzed in both control test groups. showed a marked mitodepressive action mitosis. Additionally, MN ...

Cadmium (Cd), as a widespread metal pollutant, readily accumulates in the food chain due to its easy absorption and high mobility. The endophytic fungi are cosmopolitan microorganisms that occur widely in association with plants in a heavy metal stress environment. A current pot experiment was conducted to evaluate the influence of Piriformospora indica, as a root endosymbiotic fungus, on the b...

The major "benefit" alleged to accrue from transpiration (the evaporative loss of water from plant surfaces) is that it is essential for the long-distance transport of mineral ions, but the possible interrelation between these two processes has rarely been tested. Transpiration was experimentally dissociated from mineral supply by growing sunflowers (Helianthus anuus) in hydroculture and provid...