RESUMO
New data on the effect of colloidal silicon nanoparticles on the content of nutrients and photosynthetic pigments in tomato plants invaded by root-knot nematode Meloidogyne incognita are presented. Foliar treatment of plants with colloidal solutions of silicon nanoparticles at concentrations of 0.5 and 1.0 µg/mL revealed an increase in the content of photosynthetic pigments and a number of biogenic elements (P, Mg, K, S, and Fe) in tomato leaves, indicating an improvement in the physiological state of the invaded plants. The stimulating effect of nanosilicon on the development and growth of plants and the inhibiting effect on the susceptibility of plants by nematodes and the morpho-physiological parameters of the parasite is shown.
Assuntos
Nanopartículas/administração & dosagem , Pigmentos Biológicos/metabolismo , Doenças das Plantas/prevenção & controle , Silício/farmacologia , Solanum lycopersicum/efeitos dos fármacos , Solanum lycopersicum/parasitologia , Oligoelementos/metabolismo , Animais , Solanum lycopersicum/metabolismo , Nanopartículas/química , Fotossíntese/efeitos dos fármacos , Doenças das Plantas/parasitologia , Raízes de Plantas/efeitos dos fármacos , Raízes de Plantas/parasitologia , Silício/química , Tylenchoidea/isolamento & purificaçãoRESUMO
The karyotype of males of two species of the genus Nothobranchius with the lowest diploid numbers was investigated: Nothobranchius rachovi (2N = 16) and Nothobranchius krysanov (2N = 18). For the first time, whole mounts of spread synaptonemal complexes (SC) of these species were obtained and investigated. When the SC was painted with silver nitrate and immunostained with rabbit antibodies against the SCP3 protein, eight and nine homomorphic SCs were detected in the nuclei of class I spermatocytes of N. krysanovi and N. rachovi, respectively. The sex chromosomes were not identified.
