RT journal article
T1 Anatomical drivers of stomatal conductance in sorghum lines with different leaf widths grown under different temperatures
A1 Al-Salman, Yazen
A1 Cano, Francisco J.
A1 Pan, Ling
A1 Koller, Fiona
A1 Piñeiro Nevado, Juan
A1 Jordan, David
A1 Ghannoum, Oula
A1 Cano
A2 Biología
K1 C4 photosynthesis
K1 intercellular airspaces
K1 interveinal distance
K1 mesophyll thickness
K1 stomatal size
K1 temperature response
K1 water use efficiency
AB Sustaining crop productivity and resilience in water-limited environments and under rising temperatures are matters of concern worldwide. We investigated the leaf anatomical traits that underpin our recently identified link between leaf width (LW) and intrinsic water use efficiency (iWUE), as traits of interest in plant breeding. Ten sorghum lines with varying LW were grown under three temperatures to expand the range of variation of both LW and gas exchange rates. Leaf gas exchange, surface morphology and cross-sectional anatomy were measured and analysed using structural equations modelling. Narrower leaves had lower stomatal conductance (gs) and higher iWUE across growth temperatures. They also had smaller intercellular airspaces, stomatal size, percentage of open stomatal aperture relative to maximum, hydraulic pathway, mesophyll thickness, and leaf mass per area. Structural modelling revealed a developmental association among leaf anatomical traits that underpinned gs variation in sorghum. Growing temperature and LW both impacted leaf gas exchange rates, but only LW directly impacted leaf anatomy. Wider leaves may be more productive under well-watered conditions, but consume more water for growth and development, which is detrimental under water stress.
PB Wiley
SN 0140-7791
YR 2023
FD 2023-04-17
LK http://hdl.handle.net/10498/29707
UL http://hdl.handle.net/10498/29707
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 21-sep-2026