Above and belowground traits impacting transpiration decline during soil drying in 48 maize (Zea mays) genotypes
Research output: Contribution to journal › Journal article › Research › peer-review
Standard
Above and belowground traits impacting transpiration decline during soil drying in 48 maize (Zea mays) genotypes. / Koehler, Tina; Schaum, Carolin; Tung, Shu-Yin; Steiner, Franziska; Tyborski, Nicolas; Wild, Andreas J.; Akale, Asegidew; Pausch, Johanna; Lueders, Tillmann; Wolfrum, Sebastian; Mueller, Carsten W.; Vidal, Alix; Vahl, Wouter K.; Groth, Jennifer; Eder, Barbara; Ahmed, Mutez A.; Carminati, Andrea.
In: Annals of Botany, Vol. 131, No. 2, 2023, p. 373–386.Research output: Contribution to journal › Journal article › Research › peer-review
Harvard
APA
Vancouver
Author
Bibtex
}
RIS
TY - JOUR
T1 - Above and belowground traits impacting transpiration decline during soil drying in 48 maize (Zea mays) genotypes
AU - Koehler, Tina
AU - Schaum, Carolin
AU - Tung, Shu-Yin
AU - Steiner, Franziska
AU - Tyborski, Nicolas
AU - Wild, Andreas J.
AU - Akale, Asegidew
AU - Pausch, Johanna
AU - Lueders, Tillmann
AU - Wolfrum, Sebastian
AU - Mueller, Carsten W.
AU - Vidal, Alix
AU - Vahl, Wouter K.
AU - Groth, Jennifer
AU - Eder, Barbara
AU - Ahmed, Mutez A.
AU - Carminati, Andrea
PY - 2023
Y1 - 2023
N2 - Background and Aims Stomatal regulation allows plants to promptly respond to water stress. However, our understanding of the impact of above and belowground hydraulic traits on stomatal regulation remains incomplete. The objective of this study was to investigate how key plant hydraulic traits impact transpiration of maize during soil drying. We hypothesize that the stomatal response to soil drying is related to a loss in soil hydraulic conductivity at the root-soil interface, which in turn depends on plant hydraulic traits. Methods We investigate the response of 48 contrasting maize (Zea mays) genotypes to soil drying, utilizing a novel phenotyping facility. In this context, we measure the relationship between leaf water potential, soil water potential, soil water content and transpiration, as well as root, rhizosphere and aboveground plant traits. Key Results Genotypes differed in their responsiveness to soil drying. The critical soil water potential at which plants started decreasing transpiration was related to a combination of above and belowground traits: genotypes with a higher maximum transpiration and plant hydraulic conductance as well as a smaller root and rhizosphere system closed stomata at less negative soil water potentials. Conclusions Our results demonstrate the importance of belowground hydraulics for stomatal regulation and hence drought responsiveness during soil drying. Furthermore, this finding supports the hypothesis that stomata start to close when soil hydraulic conductivity drops at the root-soil interface.
AB - Background and Aims Stomatal regulation allows plants to promptly respond to water stress. However, our understanding of the impact of above and belowground hydraulic traits on stomatal regulation remains incomplete. The objective of this study was to investigate how key plant hydraulic traits impact transpiration of maize during soil drying. We hypothesize that the stomatal response to soil drying is related to a loss in soil hydraulic conductivity at the root-soil interface, which in turn depends on plant hydraulic traits. Methods We investigate the response of 48 contrasting maize (Zea mays) genotypes to soil drying, utilizing a novel phenotyping facility. In this context, we measure the relationship between leaf water potential, soil water potential, soil water content and transpiration, as well as root, rhizosphere and aboveground plant traits. Key Results Genotypes differed in their responsiveness to soil drying. The critical soil water potential at which plants started decreasing transpiration was related to a combination of above and belowground traits: genotypes with a higher maximum transpiration and plant hydraulic conductance as well as a smaller root and rhizosphere system closed stomata at less negative soil water potentials. Conclusions Our results demonstrate the importance of belowground hydraulics for stomatal regulation and hence drought responsiveness during soil drying. Furthermore, this finding supports the hypothesis that stomata start to close when soil hydraulic conductivity drops at the root-soil interface.
KW - Critical soil water potential
KW - transpiration
KW - leaf water potential
KW - rhizosheath
KW - rhizosphere
KW - plant hydraulic conductance
KW - root length
KW - soil drying
KW - Zea mays
KW - phenotyping
KW - ROOT WATER-UPTAKE
KW - SIMPLE CONSISTENT MODELS
KW - HYDRAULIC CONDUCTIVITY
KW - STOMATAL CLOSURE
KW - DROUGHT TOLERANCE
KW - CONDUCTANCE
KW - RESPONSES
KW - VULNERABILITY
KW - VARIABILITY
KW - SENSITIVITY
U2 - 10.1093/aob/mcac147
DO - 10.1093/aob/mcac147
M3 - Journal article
C2 - 36479887
VL - 131
SP - 373
EP - 386
JO - Annals of Botany
JF - Annals of Botany
SN - 0305-7364
IS - 2
ER -
ID: 335277840