Display options
Cite
Henry A, Wehler R, Grondin A, et al. Environmental and physiological effects on grouping of drought-tolerant and susceptible rice varieties related to rice (Oryza sativa) root hydraulics under drought. Ann Bot. 2016;118(4):711-724doi: 10.1093/aob/mcw068.
Henry, A., Wehler, R., Grondin, A., Franke, R., & Quintana, M. (2016). Environmental and physiological effects on grouping of drought-tolerant and susceptible rice varieties related to rice (Oryza sativa) root hydraulics under drought. Annals of botany, 118(4), 711-724. https://doi.org/10.1093/aob/mcw068
Henry, Amelia, et al. "Environmental and physiological effects on grouping of drought-tolerant and susceptible rice varieties related to rice (Oryza sativa) root hydraulics under drought." Annals of botany vol. 118,4 (2016): 711-724. doi: https://doi.org/10.1093/aob/mcw068
Henry A, Wehler R, Grondin A, Franke R, Quintana M. Environmental and physiological effects on grouping of drought-tolerant and susceptible rice varieties related to rice (Oryza sativa) root hydraulics under drought. Ann Bot. 2016 Oct 01;118(4):711-724. doi: 10.1093/aob/mcw068. PMID: 27192712; PMCID: PMC5055623.
Copy Download .nbib Format: NLM
Share it on

Ann Bot. 2016 Oct 01;118(4):711-724. doi: 10.1093/aob/mcw068.

Environmental and physiological effects on grouping of drought-tolerant and susceptible rice varieties related to rice (Oryza sativa) root hydraulics under drought.

Annals of botany

Amelia Henry, Regina Wehler, Alexandre Grondin, Rochus Franke, Marinell Quintana

Affiliations

  1. International Rice Research Institute, Los Baños, Philippines and.
  2. University of Bonn, Bonn, Germany.

PMID: 27192712 PMCID: PMC5055623 DOI: 10.1093/aob/mcw068

Abstract

Background and Aims Root hydraulic limitations (i.e. intra-plant restrictions to water movement) may be related to crop performance under drought, and groupings in the hydraulic function of drought-tolerant and drought-susceptible rice (Oryza sativa) varieties have been previously reported. This study aimed to better understand the environmental and physiological relationships with rice root hydraulics under drought. Methods Xylem sap bleeding rates in the field (gsap g-1shoot) were measured on seasonal and diurnal time frames, during which time environmental conditions were monitored and physiological measurements were conducted. Complementary experiments on the effects of vapour pressure deficit (VPD) on root hydraulic conductivity and on transpiration rates of de-rooted tillers were conducted in growth chambers. Key Results The diurnal effects on bleeding rate were more closely related to irradiance than VPD, and VPD effects on root hydraulic conductivity measured on 21-day-old plants were due to effects on plant growth including root surface area, maximum root depth and root:shoot ratio. Leaf osmotic potential was related to the grouping of drought-tolerant and drought-susceptible varieties in rice root hydraulics, and these groupings were independent of differences in phenology. Low single-tiller bleeding rates were observed under high evapo-transpirational demand, higher bleeding rates were observed at more negative leaf osmotic potentials in drought-susceptible varieties, and drought-tolerant and susceptible varieties differed in the VPD-induced increase in transpiration rates of de-rooted tillers. Low root suberin amounts in some of the drought-susceptible varieties may have resulted in higher ion transport, as evidenced by higher sap K+ concentration and higher bleeding rates in those varieties. Conclusions These results provide evidence of the environmental effects on shoots that can influence root hydraulics. The consistent groupings of drought-tolerant and susceptible varieties suggest that traits affecting plant osmotic status may regulate root hydraulic response to drought in rice.

© The Author 2016. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For Permissions, please email: [email protected].

Keywords: Drought; hydraulics; rice; root

References

  1. Plant Cell Environ. 2016 Feb;39(2):347-65 - PubMed
  2. J Exp Bot. 2010 Mar;61(5):1431-40 - PubMed
  3. Plant Cell Environ. 2010 Aug 1;33(8):1256-67 - PubMed
  4. J Exp Bot. 2009;60(7):2155-67 - PubMed
  5. Plant Cell Environ. 2011 Aug;34(8):1223-40 - PubMed
  6. Ann Bot. 2010 Nov;106(5):803-11 - PubMed
  7. J Exp Bot. 2011 Aug;62(12):4239-52 - PubMed
  8. Plant Biol (Stuttg). 2013 Mar;15(2):304-16 - PubMed
  9. Nat Commun. 2014 Nov 05;5:5365 - PubMed
  10. BMC Genet. 2015 Aug 05;16:86 - PubMed
  11. Phytochemistry. 2005 Nov;66(22):2643-58 - PubMed
  12. J Exp Bot. 2012 Aug;63(13):4751-63 - PubMed

Publication Types