Growth dynamics of the branching system in grasses: an architecture-based methodology for quantitative evaluation applied to two genotypes of Paspalum vaginatum
Abstract The aerial growth dynamics of the shoots of the widespread turfgrass Paspalum vaginatum was studied. With the aim of identifying quantitative differential features between two genotypes, plants were cultivated outdoors in pots during two consecutive summers. Axes of different branching orde...
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Published in | Rodriguésia Vol. 70 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Instituto de Pesquisas Jardim Botânico do Rio de Janeiro
2019
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Subjects | |
Online Access | Get full text |
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Summary: | Abstract The aerial growth dynamics of the shoots of the widespread turfgrass Paspalum vaginatum was studied. With the aim of identifying quantitative differential features between two genotypes, plants were cultivated outdoors in pots during two consecutive summers. Axes of different branching order were marked for periodical observation to quantify internode production rate, axis production rate, covering rate and reproductive effort. The genotypes differed significantly in the following quantitative features: plagiotropic vs. orthotropic axes proportion, internode production rate, flowering vs. vegetative tiller ratio, vegetative cover and spatial distribution of the canopy. Knowledge of these features may help to understand the great plasticity and adaptability of this species to multiple environmental conditions.
Resumo Foi estudada a dinâmica do crescimento dos caules aéreos de Paspalum vaginatum, uma gramínea de ampla distribuição. Com o objetivo de identificar características diferenciais quantitativas entre dois genótipos, as plantas foram cultivadas ao ar livre em vasos durante dois verões consecutivos. Os eixos de diferentes ramificações foram marcados para observação periódica para quantificar a taxa de produção de entrenós, taxa de crescimento do eixo principal, taxa de cobertura e esforço reprodutivo. Os genótipos diferiram significativamente nas seguintes características quantitativas: proporção de eixos plagiotrópicos vs. ortotrópicos, taxa de produção de entrenós, proporção de eixos reprodutivos vs. vegetativos, cobertura vegetal e distribuição espacial do canópia. O conhecimento dessas características pode ajudar a compreender a grande plasticidade e adaptabilidade desta espécie a múltiplas condições ambientais. |
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ISSN: | 0370-6583 2175-7860 2175-7860 |
DOI: | 10.1590/2175-7860201970081 |