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Synergistic Effects of Melatonin and Gamma-Aminobutyric Acid on Protection of Photosynthesis System in Response to Multiple Abiotic Stressors
- Source :
- Cells, Vol 10, Iss 1631, p 1631 (2021), Cells, Volume 10, Issue 7
- Publication Year :
- 2021
- Publisher :
- MDPI AG, 2021.
-
Abstract
- GABA (gamma-aminobutyric acid) and melatonin are endogenous compounds that enhance plant responses to abiotic stresses. The response of Vicia faba to different stressors (salinity (NaCl), poly ethylene glycol (PEG), and sulfur dioxide (SO2)) was studied after priming with sole application of GABA and melatonin or their co-application (GABA + melatonin). Both melatonin and GABA and their co-application increased leaf area, number of flowers, shoot dry and fresh weight, and total biomass. Plants treated with GABA, melatonin, and GABA + melatonin developed larger stomata with wider aperture compared to the stomata of control plants. The functionality of the photosynthetic system was improved in primed plants. To investigate the photosynthetic functionality in details, the leaf samples of primed plants were exposed to different stressors, including SO2, PEG, and NaCl. The maximum quantum yield of photosystem II (PS II) was higher in the leaf samples of primed plants, while the non-photochemical quenching (NPQ) of primed plants was decreased when leaf samples were exposed to the stressors. Correlation analysis showed the association of initial PIabs with post-stress FV/FM and NPQ. Stressors attenuated the association of initial PIabs with both FV/FM and NPQ, while priming plants with GABA, melatonin, or GABA + melatonin minimized the effect of stressors by attenuating these correlations. In conclusion, priming plants with both GABA and melatonin improved growth and photosynthetic performance of Vicia faba and mitigated the effects of abiotic stressors on the photosynthetic performance.
- Subjects :
- 0106 biological sciences
0301 basic medicine
Chlorophyll
endocrine system
Photosystem II
QH301-705.5
Flowers
Sodium Chloride
Photosynthesis
energy flux
01 natural sciences
Plant Roots
gamma-Aminobutyric acid
Article
Melatonin
03 medical and health sciences
Osmotic Pressure
Stress, Physiological
PEG ratio
medicine
Sulfur Dioxide
Biomass
Biology (General)
gamma-Aminobutyric Acid
Abiotic component
photosynthesis
Chemistry
fungi
food and beverages
General Medicine
Vicia faba
Horticulture
030104 developmental biology
Shoot
Plant Stomata
chemical priming
OJIP
Plant Shoots
hormones, hormone substitutes, and hormone antagonists
010606 plant biology & botany
medicine.drug
Subjects
Details
- Language :
- English
- ISSN :
- 20734409
- Volume :
- 10
- Issue :
- 1631
- Database :
- OpenAIRE
- Journal :
- Cells
- Accession number :
- edsair.doi.dedup.....933e4cf173f75917f4540ca0ac1a7a43