@article{fdi:010011032,
  title = {{I}mpact of late-season drought on water relations in a sparse canopy of millet ({P}ennisetum glaucum ({L}.) {R}. {B}r.)},
  author = {{D}o, {F}r{\'e}d{\'e}ric and {W}inkel, {T}hierry and {C}ournac, {L}. and {L}ouguet, {P}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A}lthough millet is known to be adapted to very dry conditions, little is known about its canopy water relations. {T}he control of water loss and dehydration tolerance were studied during the grain filling for two cultivars presumed resistant and sensitive to moisture deficit at this stage. {T}wo experiments were conducted in the dry hot season at {N}iamey, using crops based on the traditional system of hill sowing at low density : a preliminary trial with low leaf area (index of 0.7 at flowering) ; and a main trial with higher leaf area (index of 1.8) induced by tillering where parameters were recorded at a short time scale. {T}he preliminary trial with small initial leaf area revealed a less apparent leaf water deficit according to leaf water potential and stomatal regulation but the main results were in agreement with those of the main trial. {T}he cultivars were similar in their water relations. {D}uring drought, water losses declined quickly due essentially to a large decrease in the green leaf area through senescence. {T}he potential effect of stomatal regulation was reduced by a natural decline of 50% after earing. {T}he water deficit was relatively small and osmotic adjustement was absent in the upper leaves of eared shoots, which stayed green. {T}hese results reveal for millet, that rapid control of leaf area by senescence is the predominant mechanism at this stage, inducing long-term avoidance of dehydration of the upper leaves on eared shoots. {T}he quick adjustment of canopy conductance to the reduction of soil water availability is an hypothesis advanced. ({R}{\'e}sum{\'e} d'auteur)},
  keywords = {{PHYSIOLOGIE} {VEGETALE} ; {CULTIVAR} ; {DEFICIT} {HYDRIQUE} ; {EVAPOTRANSPIRATION} ; {CANOPEE} ; {ZONE} {SAHELIENNE}},
  booktitle = {},
  journal = {{F}ield {C}rops {R}esearch},
  volume = {48},
  numero = {},
  pages = {103--113},
  ISSN = {0378-4290},
  year = {1996},
  DOI = {10.1016/{S}0378-4290(96)01030-1},
  URL = {https://www.documentation.ird.fr/hor/fdi:010011032},
}