<b>Hydrotime model can describe the response of common bean (<i>Phaseolus vulgaris</i> L.) seeds to temperature and reduced water potential</b> - doi: 10.4025/actascibiolsci.v35i2.15393

  • Victor José Mendes Cardoso Universidade Estadual Paulista
  • André Bianconi Universidade Estadual Paulista
Palavras-chave: Carioca, Grauna, IAPAR 81, Uirapuru, germination, model

Resumo

Germination parameters of the response to temperature and water potential from four common bean (Phaseolus vulgaris) lines based on thermal-time and hydrotime concepts were estimated to verify to what extent they can predict germination under different thermal and water conditions. The cultivars IPR Uirapuru and IAPAR 81 (drought-tolerant), and Grauna and Carioca (not tolerant) were used. The isothermal assays were performed in a temperature gradient block, and the assays with different osmotic potentials (PEG 6000) were performed in germination chambers. Seeds from drought-tolerant cultivars spent less time to germinate at supra-optimum temperatures than non-tolerant ones, and the cultivar Uirapuru (drought-tolerant) germinated faster in response to reduced Y and low temperatures. The parameter Yb(50) did not discriminate between drought-tolerant and non-tolerant lines at the infra-optimum temperature range, but it can be used to identify drought-tolerant lines at high temperatures. In general, the hydrotime model reproduced the actual germination data relatively well, chiefly at higher temperatures. This study evidenced that the hydrotime model can be used to describe the germination of common bean seeds under reduced water potentials, and as a screening tool for drought-tolerant bean genotypes.

Downloads

Não há dados estatísticos.

Biografia do Autor

Victor José Mendes Cardoso, Universidade Estadual Paulista
André Bianconi, Universidade Estadual Paulista
Publicado
2012-12-20
Como Citar
Cardoso, V. J. M., & Bianconi, A. (2012). <b>Hydrotime model can describe the response of common bean (<i>Phaseolus vulgaris</i> L.) seeds to temperature and reduced water potential</b&gt; - doi: 10.4025/actascibiolsci.v35i2.15393. Acta Scientiarum. Biological Sciences, 35(2), 255-261. https://doi.org/10.4025/actascibiolsci.v35i2.15393
Seção
Morfofisiologia Vegetal

 

0.6
2019CiteScore
 
 
31st percentile
Powered by  Scopus

 

 

0.6
2019CiteScore
 
 
31st percentile
Powered by  Scopus