Root life history of non-dehiscent sesame (Sesamum indicum L.) cultivars and the relationship with canopy development - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Field Crops Research Année : 2019

Root life history of non-dehiscent sesame (Sesamum indicum L.) cultivars and the relationship with canopy development

Romain Gloaguen
Annie Couch
  • Fonction : Auteur
Diane Rowland
  • Fonction : Auteur
Jerry Bennett
  • Fonction : Auteur
George Hochmuth
  • Fonction : Auteur
D. Ray Langham
  • Fonction : Auteur
Zachary Brym
  • Fonction : Auteur

Résumé

This study described sesame’s rooting behavior and the relationship between above- and belowground biomass in architecture and senescence dynamics. Six non-dehiscent sesame cultivars, branched and non-branched, were grown for two years in North Central Florida’s sandy soils in 2013 and 2014. The root systems were imaged in situ with a minirhizotron camera 5 times in 2013 and 7 times in 2014. Total root length, surface area and diameter were measured for each image, and roots were separated between alive, dying and dead. Leaf area index was recorded 5 times both years. Results showed that averaged maximum root diameter for all cultivars was <2 mm. Most roots were present between 20 to 50 cm deep, and a multivariate approach, namely a canonical discriminant analysis, showed that some cultivars tended to have more roots in the soil mid-depth ranges than others. However, these observations were not stable throughout the season. Leaf area index showed differences between cultivars, but these did not translate into contrasting yields. Results also highlighted a lag between leaf area index and total root length senescence, the former declining about 2 weeks before the latter. This study is among the first to describe sesame rooting characteristics in details.

Domaines

Agronomie

Dates et versions

hal-04332111 , version 1 (08-12-2023)

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Citer

Romain Gloaguen, Annie Couch, Diane Rowland, Jerry Bennett, George Hochmuth, et al.. Root life history of non-dehiscent sesame (Sesamum indicum L.) cultivars and the relationship with canopy development. Field Crops Research, 2019, 241, pp.107560. ⟨10.1016/j.fcr.2019.107560⟩. ⟨hal-04332111⟩
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