Screening for drought tolerance of maize hybrids by multi-scale analysis of root and shoot traits at the seedling stage

Journal of Experimental Botany
Viktoriya AvramovaGerrit T S Beemster

Abstract

We studied the drought response of eight commercial hybrid maize lines with contrasting drought sensitivity together with the reference inbred line B73 using a non-invasive platform for root and shoot phenotyping and a kinematics approach to quantify cell level responses in the leaf. Drought treatments strongly reduced leaf growth parameters including projected leaf area, elongation rate, final length and width of the fourth and fifth leaf. Physiological measurements including water use efficiency, chlorophyll fluorescence and photosynthesis were also significantly affected. By performing a kinematic analysis, we show that leaf growth reduction in response to drought is mainly due to a decrease in cell division rate, whereas a marked reduction in cell expansion rate is compensated by increased duration of cell expansion. Detailed analysis of root growth in rhizotrons under drought conditions revealed a strong reduction in total root length as well as rooting depth and width. This was reflected by corresponding decreases in fresh and dry weight of the root system. We show that phenotypic differences between lines differing in geographic origin (African vs. European) and in drought tolerance under field conditions can already be ...Continue Reading

References

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Citations

Nov 11, 2017·Journal of Experimental Botany·Maria Betsabe Mantilla-Perez, Maria G Salas Fernandez
Nov 18, 2018·Journal of Experimental Botany·Marta Del Bianco, Stefan Kepinski
Feb 26, 2020·Annual Review of Plant Biology·Michelle WattUlrich Schurr
Jun 13, 2020·The Plant Journal : for Cell and Molecular Biology·Thibaut BontpartPeter Doerner
Mar 25, 2017·Journal of Experimental Botany·Francois TardieuRoberto Tuberosa
Feb 18, 2017·Frontiers in Plant Science·Viktoriya AvramovaGerrit T S Beemster
Dec 19, 2019·Frontiers in Plant Science·Francisco J CanalesElena Prats
Aug 7, 2019·International Journal of Molecular Sciences·Seyed Abdollah HosseiniJean-Claude Yvin
Mar 2, 2018·PeerJ·Kiflemariam Yehuala BelachewFrederick L Stoddard
Feb 1, 2016·Functional Plant Biology : FPB·Boaz Negin, Menachem Moshelion
Jul 3, 2021·Plants·Talles de Oliveira SantosGabriel Moreno Bernardo Gonçalves
Oct 8, 2021·BioTechniques·Mery Nair Sáenz-Rodríguez, Gladys Iliana Cassab López

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