Relationship between nodule size and conventional nodulation measurements - DOI: 10.4025/actasciagron.v29i1.65

• Autor(a) principal: Costa, José Valdemir Tenório da
• Data de Publicação: 2007
• Outros Autores: Lira Júnior, Mario de Andrade, Ferreira, Rinaldo Luiz Caraciolo, Stamford, Newton Pereira, Campanharo, Marcela, Sousa, Clayton Albuquerque de
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Acta Scientiarum. Agronomy (Online)
• DOI: 10.4025/actasciagron.v29i1.65
• Texto Completo: http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/65
• topic: análise de imagens; rizóbio; fixação biológica de nitrogênio; FBN

Relationship between nodule size and conventional nodulation measurements. A method was tested to allow the study over time of individual legume nodules. From seven days after emergence to full physiological maturity of cowpea plants weekly determinations of nodule number, size and dry matter, leaf area, plant height aerial part and root system dry masses and nitrogenase activity. Nodules were digitized at 100, 200 and 300 dots per inch resolutions, and each nodule length and diameter was measured with a digital pachymeter and on the digital images. Images of the root system of all plants were obtained weekly at 300 dpi on the larger sides of the pots. Destructive and non-destructive nodule size determinations were generally similar. Non-destructive measures of nodule size were valid predictors for measures such as nodule dry matter.