Publications by authors named "A P Varani"

Mimosa tenuiflora, popularly known as "Jurema-Preta", is a perennial tree or shrub native to the tropical regions of the Americas, particularly among Afro-Brazilian and Indigenous Brazilian communities. Known for producing N,N-Dimethyltryptamine, a psychedelic compound with profound psychological effects, Jurema-Preta has been studied for its therapeutic potential in mental health. This study offers a comprehensive analysis of the plastid (ptDNA) and mitochondrion (mtDNA) genomes of M.

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  • Megaleporinus macrocephalus (piauçu) is a Neotropical fish with a unique ZZ/ZW sex determination system, making it an excellent model to study sex chromosomes.
  • Researchers assembled a high-quality reference genome of over 1.28 billion base pairs, revealing distinct regions on the sex chromosome that exhibit degeneration and differentiation.
  • Key findings indicate that genes like amhr2 and bmp7 may play important roles in sex determination and provide insights into the evolutionary dynamics of fish sex chromosomes.
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Exploring the intricate relationships between plants and their resident microorganisms is crucial not only for developing new methods to improve disease resistance and crop yields but also for understanding their co-evolutionary dynamics. Our research delves into the role of the phyllosphere-associated microbiome, especially Actinomycetota species, in enhancing pathogen resistance in Theobroma grandiflorum, or cupuassu, an agriculturally valuable Amazonian fruit tree vulnerable to witches' broom disease caused by Moniliophthora perniciosa. While breeding resistant cupuassu genotypes is a possible solution, the capacity of the Actinomycetota phylum to produce beneficial metabolites offers an alternative approach yet to be explored in this context.

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  • Genetically modified (GM) crops utilizing Bacillus thuringiensis (Bt) toxins have significantly changed agriculture, but their benefits are being challenged by unsustainable practices and pests like the fall armyworm (FAW).
  • An analysis of two FAW populations showed one was resistant to the Bt toxins, specifically Cry1A.105 and Cry2Ab2, which are used in GM corn and cotton, indicating that resistance jeopardizes the effectiveness of these crops.
  • The study identified 53 gene targets that could be linked to the resistance mechanisms in FAW, highlighting the importance of transcriptomic analyses to pursue solutions for maintaining the benefits of GM crops amid these evolving challenges.
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Previous studies from our laboratory have shown sex differences in the behavioral, molecular, and neurochemical manifestations of morphine withdrawal and they were related to an increased sensitivity to morphine effects in males. In addition, we observed an interaction between the GABAergic and opioid systems that could also be sex-dependent. Baclofen, a GABA receptor agonist, prevented the somatic expression and the molecular and neurochemical changes induced by morphine withdrawal syndrome in mice.

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