Details
| Original language | English |
|---|---|
| Pages (from-to) | 797-807 |
| Number of pages | 11 |
| Journal | Annals of botany |
| Volume | 121 |
| Issue number | 5 |
| Early online date | 19 Sept 2017 |
| Publication status | Published - 18 Apr 2018 |
Abstract
Background and Aims Most crop species are glycophytes, and salinity stress is one of the most severe abiotic stresses reducing crop yields worldwide. Salinity affects plant architecture and physiological functions by different mechanisms, which vary largely between crop species and determine the susceptibility or tolerance of a crop species to salinity. Methods Experimental data from greenhouse cucumber (Cucumis sativus), a salt-sensitive species, grown under three salinity levels were interpreted by combining a functional-structural plant model and quantitative limitation analysis of photosynthesis. This approach allowed the quantitative dissection of canopy photosynthetic limitations into architectural and functional limitations. Functional limitations were further dissected into stomatal (L s), mesophyll (L m) and biochemical (L b). Key Results Architectural limitations increased rapidly after the start of the salinity treatment and became stronger than the sum of functional limitations (L s + L m + L b) under high salinity. Stomatal limitations resulted from ionic effects and were much stronger than biochemical limitations, indicating that canopy photosynthesis was more limited by the effects of leaf sodium on stomatal regulation than on photosynthetic enzymes. Sensitivity analyses suggested that the relative importance of salinity effects on architectural and functional limitations depends on light conditions, with high light aggravating functional limitations through salinity effects on stomatal limitations. Conclusions Salinity tolerance of cucumber is more likely to be improved by traits related to leaf growth and stomatal regulation than by traits related to tissue tolerance to ion toxicity, especially under high light conditions.
Keywords
- architecture, Canopy photosynthesis, Cucumis sativus, functional-structural plant model, FvCB model, high light, quantitative limitation analysis, salinity, stress combination
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Plant Science
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In: Annals of botany, Vol. 121, No. 5, 18.04.2018, p. 797-807.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - High light aggravates functional limitations of cucumber canopy photosynthesis under salinity
AU - Chen, Tsu Wei
AU - Stützel, Hartmut
AU - Kahlen, Katrin
N1 - Funding Information: This work was supported by Deutsche Forschungsgemeinschaft (DFG). The authors thank Ilona Napp for her help throughout the experiment, Melanie Kielenbeck, Marlena Klug and Emely Petersen for plant digitizing and sample preparation, Marie-Luise Lehmann for chemical analyses and Dr Michael Henke and Magnus Adler for their advices in programming the model.
PY - 2018/4/18
Y1 - 2018/4/18
N2 - Background and Aims Most crop species are glycophytes, and salinity stress is one of the most severe abiotic stresses reducing crop yields worldwide. Salinity affects plant architecture and physiological functions by different mechanisms, which vary largely between crop species and determine the susceptibility or tolerance of a crop species to salinity. Methods Experimental data from greenhouse cucumber (Cucumis sativus), a salt-sensitive species, grown under three salinity levels were interpreted by combining a functional-structural plant model and quantitative limitation analysis of photosynthesis. This approach allowed the quantitative dissection of canopy photosynthetic limitations into architectural and functional limitations. Functional limitations were further dissected into stomatal (L s), mesophyll (L m) and biochemical (L b). Key Results Architectural limitations increased rapidly after the start of the salinity treatment and became stronger than the sum of functional limitations (L s + L m + L b) under high salinity. Stomatal limitations resulted from ionic effects and were much stronger than biochemical limitations, indicating that canopy photosynthesis was more limited by the effects of leaf sodium on stomatal regulation than on photosynthetic enzymes. Sensitivity analyses suggested that the relative importance of salinity effects on architectural and functional limitations depends on light conditions, with high light aggravating functional limitations through salinity effects on stomatal limitations. Conclusions Salinity tolerance of cucumber is more likely to be improved by traits related to leaf growth and stomatal regulation than by traits related to tissue tolerance to ion toxicity, especially under high light conditions.
AB - Background and Aims Most crop species are glycophytes, and salinity stress is one of the most severe abiotic stresses reducing crop yields worldwide. Salinity affects plant architecture and physiological functions by different mechanisms, which vary largely between crop species and determine the susceptibility or tolerance of a crop species to salinity. Methods Experimental data from greenhouse cucumber (Cucumis sativus), a salt-sensitive species, grown under three salinity levels were interpreted by combining a functional-structural plant model and quantitative limitation analysis of photosynthesis. This approach allowed the quantitative dissection of canopy photosynthetic limitations into architectural and functional limitations. Functional limitations were further dissected into stomatal (L s), mesophyll (L m) and biochemical (L b). Key Results Architectural limitations increased rapidly after the start of the salinity treatment and became stronger than the sum of functional limitations (L s + L m + L b) under high salinity. Stomatal limitations resulted from ionic effects and were much stronger than biochemical limitations, indicating that canopy photosynthesis was more limited by the effects of leaf sodium on stomatal regulation than on photosynthetic enzymes. Sensitivity analyses suggested that the relative importance of salinity effects on architectural and functional limitations depends on light conditions, with high light aggravating functional limitations through salinity effects on stomatal limitations. Conclusions Salinity tolerance of cucumber is more likely to be improved by traits related to leaf growth and stomatal regulation than by traits related to tissue tolerance to ion toxicity, especially under high light conditions.
KW - architecture
KW - Canopy photosynthesis
KW - Cucumis sativus
KW - functional-structural plant model
KW - FvCB model
KW - high light
KW - quantitative limitation analysis
KW - salinity
KW - stress combination
UR - http://www.scopus.com/inward/record.url?scp=85046166919&partnerID=8YFLogxK
U2 - 10.1093/aob/mcx100
DO - 10.1093/aob/mcx100
M3 - Article
C2 - 29028871
AN - SCOPUS:85046166919
VL - 121
SP - 797
EP - 807
JO - Annals of botany
JF - Annals of botany
SN - 0305-7364
IS - 5
ER -