Consulta: creatorFacets:"Silva,Luzimar Campos da"
Registros recuperados: 2
Data/hora: 04/06/2024 02:02:40

Effects of aluminum on the elongation and external morphology of root tips in two maize genotypes
Provedor de dados: 53
Autores: Souza,Leandro Torres de; Cambraia,José; Ribeiro,Cleberson; Oliveira,Juraci Alves de; Silva,Luzimar Campos da.
ABSTRACT The objective of this study was to evaluate the effects of toxic levels of aluminum (Al) on the growth and external morphology of root tips in two maize genotypes with differential Al tolerance. The maize genotypes UFVM-100 (Al-sensitive) and UFVM-200 (Al-tolerant) were treated with 0 and 50 mM Al in a 0.5 mM CaCl2 solution at pH 4.5; root elongation, Al content and the external morphology of the root tips were evaluated. Chemical analysis, hematoxylin staining and energy dispersive X-ray spectrometry (EDS) showed greater Al accumulation in the root tips of the UFVM-200 genotype. The inhibition of root elongation in the UFVM-100 genotype, however, was much stronger than in the UFVM-200 genotype. Both maize genotypes exhibited visible and intense...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aluminum tolerance; Root growth; Root morphology; Zea mays.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000100019

Effects of simulated acid rain on leaf anatomy and micromorphology of Genipa americana L. (Rubiaceae)
Provedor de dados: 52
Autores: Sant'Anna-Santos,Bruno Francisco; Silva,Luzimar Campos da; Azevedo,Aristéa Alves; Aguiar,Rosane.
Experiments were conducted in order to characterize the injuries on leaf structure and micromorphology of G. americana and evaluate the degree of susceptibility of this species to simulated acid rain. Plants were exposed to acid rain (pH 3.0) for ten consecutive days. Control plants were submitted only to distilled water (pH 6.0). Leaf tissue was sampled and fixed for light and scanning electron microscopy. Necrotic interveinal spots on the leaf blade occurred. Epidermis and mesophyll cells collapse, hypertrophy of spongy parenchyma cells, accumulation of phenolic compounds and starch grains were observed in leaves exposed to acid rain. The micromorphological analysis showed, in necrotic areas, plasmolized guard cells and cuticle rupture. Epidermal and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genipa americana; Simulated acid rain; Leaf anatomy; Leaf micromorphology.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000300017