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Alves-Silva,Estevão. |
Fluctuating asymmetry (FA) can be defined as small, random deviations from bilateral symmetry in structures that are bilaterally symmetrical and can estimate a population's inability to buffer its growth against perturbations of environmental origins. Another important issue about FA is whether biotic factors may also induce stress in organisms. Therefore, in this study I aimed to investigate the influence of both the abiotic (light exposure) and biotic (Ditylenchus sp. galls) factors accounting for increased FA in Miconia fallax leaves. Galls are known as parasites and a major cause of leaf stress. Additionally, since M. fallax is a pioneer plant species, individuals in the shade were supposed to present high levels of FA relative to plants on the edges... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Edge effect; Light exposure; Pioneer plant; Cerrado. |
Ano: 2012 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2012000100006 |
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Moura,Renan Fernandes; Alves-Silva,Estevão; Del-Claro,Kleber. |
ABSTRACT Plant development is influenced by several abiotic factors, which in turn influence morphological traits and life history. We investigated whether leaf area, herbivory, toughness, fluctuating asymmetry, structural complexity and the number of inflorescences of Palicourea rigida are influenced by sun/shade conditions or by Cerrado phytophysiognomy (typical cerrado or rupestrian field). We expected to find greater structural complexity, leaf toughness and more inflorescences in sun plants; shaded plants were expected to exhibit a greater degree of fluctuating asymmetry (an index of plant stress), reduced leaf toughness and greater herbivory. As for phytophysiognomies, we expected to find higher levels of leaf toughness and reduced structural... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazilian savanna; Environmental stress; Fluctuating asymmetry; Leaf area loss; Rubiaceae; Rupestrian grassland. |
Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000200286 |
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