SciELO - Scientific Electronic Library Online

 
vol.27 número1Germination behavior and characterization of seed dormancy of Andean blueberry (Vaccinium meridionale Swartz)  Foliar nickel application to Cucurbita ficifolia Bouché for crystalline urease (EC 3.5.1.5) production índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

  • Em processo de indexaçãoCitado por Google
  • Não possue artigos similaresSimilares em SciELO
  • Em processo de indexaçãoSimilares em Google

Compartilhar


Agronomía Colombiana

versão impressa ISSN 0120-9965

Resumo

POLANIA, Joséé A.; RAO, Idupulapati M.; BEEBE, Steve  e  GARCIA, Ramiro. Root development and distribution under drought stress in common bean (Phaseolus vulgaris L.) in a soil tube system  . Agron. colomb. [online]. 2009, vol.27, n.1, pp.25-32. ISSN 0120-9965.

Phenotypic differences in root development and distribution of 16 common bean genotypes grown under drought stress were analyzed. We developed a method using transparent plastic tubes (inserted in PVC tubes), filled with a soil-sand mix (2:1, weight: weight), to capture differences in root growth under greenhouse conditions. Ten days after emergence, two water supply treatments were imposed: 80% of field capacity (without stress) and withholding of water (to induce drought stress). Total leaf chlorophyll content and transpiration rate were measured during the trial. At harvest (32 days after planting), leaf area, shoot biomass, leaf and stem total nonstructural carbohydrates content (TNC) were determined. The soil in the tubes was divided into five layers from the top to the bottom of the tube (0-5, 5-10, 10-20, 20-30 and 30-45 cm). Roots were washed from each soil layer to determine their length, diameter and dry biomass. A randomized complete block design was used with three replications. The method was suitable for determining phenotypic differences in total root length, specific root length and root distribution by soil depth. Three lines (BAT 477, SEA 5 and SER 16) were superior in their root development under drought stress.

Palavras-chave : total leaf chlorophyll content; root diameter; deep rooting; root length; transpiration rate.

        · resumo em Espanhol     · texto em Espanhol     · Espanhol ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons