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Coming of leaf age: control of growth by hydraulics and metabolics during leaf ontogeny
Coming of leaf age: control of growth by hydraulics and metabolics during leaf ontogeny
- Source :
- New Phytologist 2 (196), 349-366. (2012), New Phytologist, New Phytologist, Wiley, 2012, 196 (2), pp.349-366. ⟨10.1111/j.1469-8137.2012.04273.x⟩
- Publication Year :
- 2012
-
Abstract
- Contents Summary 349 I. Leaf growth: volume, structures, water and carbon 349 II. Coupling water and carbon limitations through the Lockhart model? 350 III. ABA signalling pathway as a hub to coordinate water and carbon relations 353 IV. Leaf venation: just a two-way pipe network? 354 V. Leaf ontogeny orchestrates the actors involved in the control of leaf growth 355 VI. The growing leaf in a changing world 360 VII. Conclusion 361 Acknowledgements 362 References 362 Summary Leaf growth is the central process facilitating energy capture and plant performance. This is also one of the most sensitive processes to a wide range of abiotic stresses. Because hydraulics and metabolics are two major determinants of expansive growth (volumetric increase) and structural growth (dry matter increase), we review the interaction nodes between water and carbon. We detail the crosstalks between water and carbon transports, including the dual role of stomata and aquaporins in regulating water and carbon fluxes, the coupling between phloem and xylem, the interactions between leaf water relations and photosynthetic capacity, the links between Lockhart's hydromechanical model and carbon metabolism, and the central regulatory role of abscisic acid. Then, we argue that during leaf ontogeny, these interactions change dramatically because of uncoupled modifications between several anatomical and physiological features of the leaf. We conclude that the control of leaf growth switches from a metabolic to a hydromechanical limitation during the course of leaf ontogeny. Finally, we illustrate how taking leaf ontogeny into account provides insights into the mechanisms underlying leaf growth responses to abiotic stresses that affect water and carbon relations, such as elevated CO2, low light, high temperature and drought.
- Subjects :
- 0106 biological sciences
carbon metabolism
Physiology
environmental stresses
Ontogeny
hydraulics
croissance foliaire
Plant Science
Biology
eau dans la plante
Photosynthesis
01 natural sciences
03 medical and health sciences
chemistry.chemical_compound
compétition source puits
Botany
leaf development
mechanics
leaf growth
[SDV.BV]Life Sciences [q-bio]/Vegetal Biology
Abscisic acid
030304 developmental biology
2. Zero hunger
Abiotic component
0303 health sciences
Vegetal Biology
flux de carbone
Ecology
fungi
Water
Xylem
food and beverages
Organ Size
15. Life on land
Photosynthetic capacity
Carbon
Plant Leaves
Light intensity
ontogénèse
chemistry
stress environnemental
métabolisme du carbone
Phloem
Biologie végétale
Abscisic Acid
Signal Transduction
010606 plant biology & botany
Subjects
Details
- Language :
- English
- ISSN :
- 0028646X and 14698137
- Database :
- OpenAIRE
- Journal :
- New Phytologist 2 (196), 349-366. (2012), New Phytologist, New Phytologist, Wiley, 2012, 196 (2), pp.349-366. ⟨10.1111/j.1469-8137.2012.04273.x⟩
- Accession number :
- edsair.doi.dedup.....9c9095b54e15d061b7ddf1c055d14902
- Full Text :
- https://doi.org/10.1111/j.1469-8137.2012.04273.x⟩