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Differences in leaf anatomy determines temperature response of leaf hydraulic and mesophyll CO 2 conductance in phylogenetically related C 4 and C 3 grass species
- Source :
- New Phytologist. 230:1802-1814
- Publication Year :
- 2021
- Publisher :
- Wiley, 2021.
-
Abstract
- Leaf hydraulic and mesophyll CO2 conductance are both influenced by leaf anatomical traits, however it is poorly understood how the temperature response of these conductances differs between C4 and C3 species with distinct leaf anatomy. This study investigated the temperature response of leaf hydraulic conductance (Kleaf ), stomatal (gs ) and mesophyll (gm ) conductance to CO2 , and leaf anatomical traits in phylogenetically related Panicum antidotale (C4 ) and P. bisulcatum (C3 ) grasses. The C4 species had lower hydraulic conductance outside xylem (Kox ) and Kleaf compared with the C3 species. However, the C4 species had higher gm compared with the C3 species. Traits associated with leaf water movement, Kleaf and Kox , increased with temperature more in the C3 than in the C4 species, whereas traits related to carbon uptake, Anet and gm , increased more with temperature in the C4 than the C3 species. Our findings demonstrate that, in addition to a CO2 concentrating mechanism, outside-xylem leaf anatomy in the C4 species P. antidotale favours lower water movement through the leaf and stomata that provides an additional advantage for greater leaf carbon uptake relative to water loss with increasing leaf temperature than in the C3 species P. bisulcatum.
- Subjects :
- 0106 biological sciences
0301 basic medicine
biology
Physiology
Chemistry
Carbon uptake
Xylem
Conductance
Plant Science
Leaf water
Anatomy
biology.organism_classification
01 natural sciences
C-4
Hydraulic conductance
law.invention
03 medical and health sciences
030104 developmental biology
law
Temperature response
Panicum
010606 plant biology & botany
Subjects
Details
- ISSN :
- 14698137 and 0028646X
- Volume :
- 230
- Database :
- OpenAIRE
- Journal :
- New Phytologist
- Accession number :
- edsair.doi...........55a877faa226cad95b04c780b0e5f6dd