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Effect of exogenously-applied abscisic acid, putrescine and hydrogen peroxide on drought tolerance of barley
- Source :
- Biologia. 76:453-468
- Publication Year :
- 2020
- Publisher :
- Springer Science and Business Media LLC, 2020.
-
Abstract
- The objective of this study was to identify the effect of abscisic acid (ABA), putrescine (Put) and hydrogen peroxide (H2O2) foliar pre-treatment on drought tolerance of barley. Despite water limitation, ABA-sprayed plants preserved increased water content, photosynthetic efficiency of PSII (ΦPSII) and CO2 assimilation rate (Pn) compared to untreated stressed plants. The ABA-treated plants presented also the lowest rate of lipid peroxidation (MDA), lowered the rate of PSII primary acceptor reduction (1 – qP) and increased the yield of regulated energy dissipation (NPQ) with higher accumulation of PGRL1 (PROTON GRADIENT REGULATION LIKE1) protein. These plants preserved a similar level of photochemical efficiency and the rate of electron transport of PSII (ETRII) to the well-watered samples. The significantly less pronounced response was observed in Put-sprayed samples under drought. Additionally, the combined effects of drought and H2O2 application increased the 1 – qP and quantum yield of non-regulated energy dissipation in PSII (ΦNO) and reduced the accumulation of Rubisco activase (RCA). In conclusion, ABA foliar application allowed to balance water retention and preserve antioxidant capacity resulting in efficient photosynthesis and the restricted risk of oxidative damage under drought. Neither hydrogen peroxide nor putrescine has been able to ameliorate drought stress as effectively as ABA.
- Subjects :
- 0106 biological sciences
0301 basic medicine
Drought tolerance
Plant Science
Photosynthetic efficiency
Photosynthesis
01 natural sciences
Biochemistry
Lipid peroxidation
03 medical and health sciences
chemistry.chemical_compound
Genetics
Hydrogen peroxide
Molecular Biology
Abscisic acid
Ecology, Evolution, Behavior and Systematics
biology
RuBisCO
Cell Biology
Horticulture
030104 developmental biology
chemistry
biology.protein
Putrescine
Animal Science and Zoology
010606 plant biology & botany
Subjects
Details
- ISSN :
- 13369563 and 00063088
- Volume :
- 76
- Database :
- OpenAIRE
- Journal :
- Biologia
- Accession number :
- edsair.doi...........a05fa5c1791da438e3643e3ee4f30400