Morphometric differences of Microgramma squamulosa (Kaulf.) de la Sota (Polypodiaceae) leaves in environments with distinct atmospheric air quality.

Leaf Dimorphism Of Microgramma Squamulosa (Polypodiaceae): a qualitative and quantitative analysis focusing on adaptations to epiphytism.

The epiphytic fern Microgramma squamulosa occurs in the Neotropics and shows dimorphic sterile and fertile leaves. The present study aimed to describe and compare qualitatively and quantitatively macroscopic and microscopic structural characteristics of the dimorphic leaves of M. squamulosa, to point more precisely those characteristics which may contribute to epiphytic adaptations. In June 200...

Record of insects in two fern species of the genus Microgramma (Polypodiaceae) in the Atlantic Rain Forest, Rio de Janeiro state, Brazil.

A nonvectorial SOTA

It may be the case that regular grids are not best suited for certain kinds of biological analysis. Specifically, sometimes a tree structure can provide the best means to organize and interpret the output neurons [Wen et al. (1992); Inoue and Narihisa (2003)]. In the case of biological data, the Self-Organizing Tree Algorithm (SOTA) [Dopazo and Carazo (1997a)] has shown promising results applie...

Biodiversity and spatial distribution of epiphytic ferns on Alsophila setosa Kaulf. (Cyatheaceae) caudices in Rio Grande do Sul, Brazil.

The extractive exploitation of the tree fern Alsophila setosa Kaulf. alters forest formations and diminishes the availability of micro-habitat for epiphytes. A survey of epiphytic fern communities on A. setosa at 16 study sites in different forest formations in the State of Rio Grande do Sul, Brazil, documented the occurrence of 31 species representing 16 genera and six families. The greatest r...

Physiological Evaluation of Apricot (Prunus armeniaca L.) Leaves to Air Pollution for Biomonitoring of Atmospheric Quality

Industrialization releases significant amounts of various air pollutants such as F, Cd, Pb, particulate matter, etc., which can in turn have a deleterious effect on a variety of biochemical and physiological processes as well as the structural organization within the cells. Responses from plants species to air pollutants is varied with certain species being very sensitive to such pollutants, en...