@article{fdi:010082672,
  title = {{T}ranspiration efficiency : insights from comparisons of {C}-4 cereal species},
  author = {{V}adez, {V}incent and {C}houdhary, {S}. and {K}holova, {J}. and {H}ash, {C}. {T}. and {S}rivastava, {R}. and {K}umar, {A}. {A}. and {P}randavada, {A}. and {A}njaiah, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e have previously reported that there is a tight link between high transpiration efficiency ({TE}; shoot biomass per unit water transpired) and restriction of transpiration under high vapor pressure deficit ({VPD}). {I}n this study, we examine other factors affecting {TE} among major {C}-4 cereals, namely species' differences, soil type, and source-sink relationships. {W}e found that {TE} in maize (10 genotypes) was higher overall than in pearl millet (10 genotypes), and somewhat higher than in sorghum (16 genotypes). {O}verall, transpiration efficiency was higher in high-clay than in sandy soil under high {VPD}, but the effect was species-dependent with maize showing large variations in {TE} and yield across different soil types whilst pearl millet showed no variation in {TE}. {T}his suggested that species fitness was specific to soil type. {R}emoval of cobs drastically decreased {TE} in maize under high {VPD}, but removal of panicles did not have the same effect in pearl millet, suggesting that source-sink balance also drove variations in {TE}. {W}e interpret the differences in {TE} between species as being accounted for by differences in the capacity to restrict transpiration under high {VPD}, with breeding history possibly having favored the source-sink balance in maize. {T}his suggests that there is also scope to increase {TE} in pearl millet and sorghum through breeding. {W}ith regards to soil conditions, our results indicate that it appears to be critical to consider hydraulic characteristics and the root system together in order to better understand stomatal regulation and restriction of transpiration under high {VPD}. {F}inally, our results highlight the importance of sink strength in regulating transpiration/photosynthesis, and hence in influencing {TE}.},
  keywords = {{A}quaporin ; breeding ; climate change ; drought ; maize ; pearl millet ; {P}ennisetum glaucum ; rhizosphere ; root hydraulics ; soil hydraulics ; {S}orghum bicolor ; {Z}ea mays},
  booktitle = {},
  journal = {{J}ournal of {E}xperimental {B}otany},
  volume = {72},
  numero = {14},
  pages = {5221--5234},
  ISSN = {0022-0957},
  year = {2021},
  DOI = {10.1093/jxb/erab251},
  URL = {https://www.documentation.ird.fr/hor/fdi:010082672},
}