Leaf Soluble Sugars and Free Amino Acids as Important Components of Abscisic Acid—Mediated Drought Response in Tomato
Authors
Živanović, BojanaMilić Komić, Sonja
Tosti, Tomislav
Vidović, Marija
Prokić, Ljiljana
Veljović Jovanović, Sonja
Article (Published version)
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Water deficit has a global impact on plant growth and crop yield. Climate changes are going to increase the intensity, duration and frequency of severe droughts, particularly in southern and south-eastern Europe, elevating the water scarcity issues. We aimed to assess the contribution of endogenous abscisic acid (ABA) in the protective mechanisms against water deficit, including stomatal conductance, relative water potential and the accumulation of osmoprotectants, as well as on growth parameters. To achieve that, we used a suitable model system, ABA-deficient tomato mutant, flacca and its parental line. Flacca mutant exhibited constitutively higher levels of soluble sugars (e.g., galactose, arabinose, sorbitol) and free amino acids (AAs) compared with the wild type (WT). Water deficit provoked the strong accumulation of proline in both genotypes, and total soluble sugars only in flacca. Upon re-watering, these osmolytes returned to the initial levels in both genotypes. Our results ind...icate that flacca compensated higher stomatal conductance with a higher constitutive level of free sugars and AAs. Additionally, we suggest that the accumulation of AAs, particularly proline and its precursors and specific branched-chain AAs in both, glucose and sucrose in flacca, and sorbitol in WT, could contribute to maintaining growth rate during water deficit and recovery in both tomato genotypes.
Keywords:
flacca mutant / ABA / Ailsa Craig cv. / arabinose / branched-chain amino acids / galactose / proline / re-watering / water deficitSource:
Plants, 2020, 9, 9, 1147-Publisher:
- MDPI
Funding / projects:
- Ministry of Science, Technological Development and Innovation of the Republic of Serbia, institutional funding - 200053 (University of Belgrade, Institute for Multidisciplinary Research) (RS-MESTD-inst-2020-200053)
DOI: 10.3390/plants9091147
ISSN: 2223-7747
WoS: 000581234100001
Scopus: 2-s2.0-85093899211
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Hemijski fakultet / Faculty of ChemistryTY - JOUR AU - Živanović, Bojana AU - Milić Komić, Sonja AU - Tosti, Tomislav AU - Vidović, Marija AU - Prokić, Ljiljana AU - Veljović Jovanović, Sonja PY - 2020 UR - https://cherry.chem.bg.ac.rs/handle/123456789/4266 AB - Water deficit has a global impact on plant growth and crop yield. Climate changes are going to increase the intensity, duration and frequency of severe droughts, particularly in southern and south-eastern Europe, elevating the water scarcity issues. We aimed to assess the contribution of endogenous abscisic acid (ABA) in the protective mechanisms against water deficit, including stomatal conductance, relative water potential and the accumulation of osmoprotectants, as well as on growth parameters. To achieve that, we used a suitable model system, ABA-deficient tomato mutant, flacca and its parental line. Flacca mutant exhibited constitutively higher levels of soluble sugars (e.g., galactose, arabinose, sorbitol) and free amino acids (AAs) compared with the wild type (WT). Water deficit provoked the strong accumulation of proline in both genotypes, and total soluble sugars only in flacca. Upon re-watering, these osmolytes returned to the initial levels in both genotypes. Our results indicate that flacca compensated higher stomatal conductance with a higher constitutive level of free sugars and AAs. Additionally, we suggest that the accumulation of AAs, particularly proline and its precursors and specific branched-chain AAs in both, glucose and sucrose in flacca, and sorbitol in WT, could contribute to maintaining growth rate during water deficit and recovery in both tomato genotypes. PB - MDPI T2 - Plants T1 - Leaf Soluble Sugars and Free Amino Acids as Important Components of Abscisic Acid—Mediated Drought Response in Tomato VL - 9 IS - 9 SP - 1147 DO - 10.3390/plants9091147 ER -
@article{ author = "Živanović, Bojana and Milić Komić, Sonja and Tosti, Tomislav and Vidović, Marija and Prokić, Ljiljana and Veljović Jovanović, Sonja", year = "2020", abstract = "Water deficit has a global impact on plant growth and crop yield. Climate changes are going to increase the intensity, duration and frequency of severe droughts, particularly in southern and south-eastern Europe, elevating the water scarcity issues. We aimed to assess the contribution of endogenous abscisic acid (ABA) in the protective mechanisms against water deficit, including stomatal conductance, relative water potential and the accumulation of osmoprotectants, as well as on growth parameters. To achieve that, we used a suitable model system, ABA-deficient tomato mutant, flacca and its parental line. Flacca mutant exhibited constitutively higher levels of soluble sugars (e.g., galactose, arabinose, sorbitol) and free amino acids (AAs) compared with the wild type (WT). Water deficit provoked the strong accumulation of proline in both genotypes, and total soluble sugars only in flacca. Upon re-watering, these osmolytes returned to the initial levels in both genotypes. Our results indicate that flacca compensated higher stomatal conductance with a higher constitutive level of free sugars and AAs. Additionally, we suggest that the accumulation of AAs, particularly proline and its precursors and specific branched-chain AAs in both, glucose and sucrose in flacca, and sorbitol in WT, could contribute to maintaining growth rate during water deficit and recovery in both tomato genotypes.", publisher = "MDPI", journal = "Plants", title = "Leaf Soluble Sugars and Free Amino Acids as Important Components of Abscisic Acid—Mediated Drought Response in Tomato", volume = "9", number = "9", pages = "1147", doi = "10.3390/plants9091147" }
Živanović, B., Milić Komić, S., Tosti, T., Vidović, M., Prokić, L.,& Veljović Jovanović, S.. (2020). Leaf Soluble Sugars and Free Amino Acids as Important Components of Abscisic Acid—Mediated Drought Response in Tomato. in Plants MDPI., 9(9), 1147. https://doi.org/10.3390/plants9091147
Živanović B, Milić Komić S, Tosti T, Vidović M, Prokić L, Veljović Jovanović S. Leaf Soluble Sugars and Free Amino Acids as Important Components of Abscisic Acid—Mediated Drought Response in Tomato. in Plants. 2020;9(9):1147. doi:10.3390/plants9091147 .
Živanović, Bojana, Milić Komić, Sonja, Tosti, Tomislav, Vidović, Marija, Prokić, Ljiljana, Veljović Jovanović, Sonja, "Leaf Soluble Sugars and Free Amino Acids as Important Components of Abscisic Acid—Mediated Drought Response in Tomato" in Plants, 9, no. 9 (2020):1147, https://doi.org/10.3390/plants9091147 . .