@article{fdi:010057313,
  title = {{R}adial force development during root growth measured by photoelasticity},
  author = {{K}olb, {E}. and {H}artmann, {C}hristian and {G}enet, {P}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he radial growth of roots largely affects and reorganizes the porous or crack networks of soils and substrates. {W}e studied the consequences of a radial steric constriction on the root growth and the feedback force developed by the root on the solid phase. {W}e developed an original method of photoelasticity to measure in situ root forces. {B}y changing the gap width (0.5 to 2.3 mm) between two photoelastic disks we applied variable radial constrictions to root growth and simultaneously measured the corresponding radial forces. {C}hanges in morphology and forces of primary roots of chick pea ({C}icer arietinum {L}.) seedlings were recorded by time-lapse imaging every 24 min up to 5 days. {T}he probability of root entering the gap depended on the gap size but was also affected by circumnutation. {C}ompared to non-constrained root controls, no significant morphological change (elongation, diameter) was measured outside the gap zone. {I}nside the gap zone, outer cortex cells were compressed, the central cylinder was unaffected. {R}adial forces were increasing with time but no force levelling was observed even after 5 days. {R}adial constrictions applied to roots did not significantly reduce their growth. {T}he radial force was related to the root strain in the gap.},
  keywords = {{R}adial force development ; {R}oot growth ; {P}hotoelasticity ; {M}echanical ; stress ; {C}icer arietinum {L}. (chick pea)},
  booktitle = {},
  journal = {{P}lant and {S}oil},
  volume = {360},
  numero = {1-2},
  pages = {19--35},
  ISSN = {0032-079{X}},
  year = {2012},
  DOI = {10.1007/s11104-012-1316-2},
  URL = {https://www.documentation.ird.fr/hor/fdi:010057313},
}