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Adjustment of Photosynthetic and Antioxidant Activities to Water Deficit Is Crucial in the Drought Tolerance of Lolium multiflorum/Festuca arundinacea Introgression Forms
- Source :
- International Journal of Molecular Sciences, Vol 21, Iss 5639, p 5639 (2020), International Journal of Molecular Sciences, Volume 21, Issue 16
- Publication Year :
- 2020
- Publisher :
- MDPI AG, 2020.
-
Abstract
- Lolium multiflorum/Festuca arundinacea introgression forms have been proved several times to be good models to identify key components of grass metabolism involved in the mechanisms of tolerance to water deficit. Here, for the first time, a relationship between photosynthetic and antioxidant capacities with respect to drought tolerance of these forms was analyzed in detail. Two closely related L. multiflorum/F. arundinacea introgression forms distinct in their ability to re-grow after cessation of prolonged water deficit in the field were selected and subjected to short-term drought in pots to dissect precisely mechanisms of drought tolerance in this group of plants. The studies revealed that the form with higher drought tolerance was characterized by earlier and higher accumulation of abscisic acid, more stable cellular membranes, and more balanced reactive oxygen species metabolism associated with a higher capacity of the antioxidant system under drought conditions. On the other hand, both introgression forms revealed the same levels of stomatal conductance, CO2 assimilation, and consequently, intrinsic water use efficiency under drought and recovery conditions. However, simultaneous higher adjustment of the Calvin cycle to water deficit and reduced CO2 availability, with respect to the accumulation and activity of plastid fructose-1,6-bisphosphate aldolase, were clearly visible in the form with higher drought tolerance.
- Subjects :
- 0106 biological sciences
0301 basic medicine
Stomatal conductance
Drought tolerance
stomata
Introgression
drought
Photosynthesis
01 natural sciences
Catalysis
forage grasses
Inorganic Chemistry
lcsh:Chemistry
03 medical and health sciences
chemistry.chemical_compound
antioxidant enzymes
Lolium multiflorum/Festuca arundinacea
Physical and Theoretical Chemistry
Water-use efficiency
Molecular Biology
Abscisic acid
lcsh:QH301-705.5
Spectroscopy
reactive oxygen species
photosynthesis
biology
Organic Chemistry
fungi
food and beverages
triacylglycerol lipids
General Medicine
Lolium multiflorum
biology.organism_classification
Computer Science Applications
030104 developmental biology
chemistry
Agronomy
lcsh:Biology (General)
lcsh:QD1-999
Festuca arundinacea
010606 plant biology & botany
Subjects
Details
- Language :
- English
- ISSN :
- 16616596 and 14220067
- Volume :
- 21
- Issue :
- 5639
- Database :
- OpenAIRE
- Journal :
- International Journal of Molecular Sciences
- Accession number :
- edsair.doi.dedup.....67a3a62aa1f62145d6d0155264b876fb