Carbon and Nitrogen Allocation between the Sink and Source Leaf Tissue in Response to the Excess Excitation Energy Conditions
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2023
Authors
Milić, DejanaŽivanović, Bojana
Samardžić, Jelena
Nikolić, Nenad
Cukier, Caroline
Limami, Anis M.
Vidović, Marija
Article (Published version)
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Plants are inevitably exposed to extreme climatic conditions that lead to a disturbed balance between the amount of absorbed energy and their ability to process it. Variegated leaves with photosynthetically active green leaf tissue (GL) and photosynthetically inactive white leaf tissue (WL) are an excellent model system to study source–sink interactions within the same leaf under the same microenvironmental conditions. We demonstrated that under excess excitation energy (EEE) conditions (high irradiance and lower temperature), regulated metabolic reprogramming in both leaf tissues allowed an increased consumption of reducing equivalents, as evidenced by preserved maximum efficiency of photosystem II (ФPSII) at the end of the experiment. GL of the EEE-treated plants employed two strategies: (i) the accumulation of flavonoid glycosides, especially cyanidin glycosides, as an alternative electron sink, and (ii) cell wall stiffening by cellulose, pectin, and lignin accumulation. On the othe...r hand, WL increased the amount of free amino acids, mainly arginine, asparagine, branched-chain and aromatic amino acids, as well as kaempferol and quercetin glycosides. Thus, WL acts as an important energy escape valve that is required in order to maintain the successful performance of the GL sectors under EEE conditions. Finally, this role could be an adaptive value of variegation, as no consistent conclusions about its ecological benefits have been proposed so far.
Keywords:
Pelargonium zonale / 15N nitrate labelling / cell wall / free amino acids / high light intensity / phenolic compounds / variegated plantsSource:
International Journal of Molecular Sciences, 2023, 24, 3, 2269-Funding / projects:
- Ministry of Science, Technological Development and Innovation of the Republic of Serbia, institutional funding - 200042 (University of Belgrade, Institute of Molecular Genetics and Genetic Engineering) (RS-MESTD-inst-2020-200042)
- 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)
- Bilateral project (no. 451-03-01963/2017-09/09)
Note:
- The APC was funded by the Ministry of Education, Science and Technological Development, the Republic of Serbia (Contract No. 451-03-68/2022-14/200042, 2022).
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- Referenced by
https://www.mdpi.com/1422-0067/24/3/2269
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Institut za molekularnu genetiku i genetičko inženjerstvoTY - JOUR AU - Milić, Dejana AU - Živanović, Bojana AU - Samardžić, Jelena AU - Nikolić, Nenad AU - Cukier, Caroline AU - Limami, Anis M. AU - Vidović, Marija PY - 2023 UR - https://imagine.imgge.bg.ac.rs/handle/123456789/1712 AB - Plants are inevitably exposed to extreme climatic conditions that lead to a disturbed balance between the amount of absorbed energy and their ability to process it. Variegated leaves with photosynthetically active green leaf tissue (GL) and photosynthetically inactive white leaf tissue (WL) are an excellent model system to study source–sink interactions within the same leaf under the same microenvironmental conditions. We demonstrated that under excess excitation energy (EEE) conditions (high irradiance and lower temperature), regulated metabolic reprogramming in both leaf tissues allowed an increased consumption of reducing equivalents, as evidenced by preserved maximum efficiency of photosystem II (ФPSII) at the end of the experiment. GL of the EEE-treated plants employed two strategies: (i) the accumulation of flavonoid glycosides, especially cyanidin glycosides, as an alternative electron sink, and (ii) cell wall stiffening by cellulose, pectin, and lignin accumulation. On the other hand, WL increased the amount of free amino acids, mainly arginine, asparagine, branched-chain and aromatic amino acids, as well as kaempferol and quercetin glycosides. Thus, WL acts as an important energy escape valve that is required in order to maintain the successful performance of the GL sectors under EEE conditions. Finally, this role could be an adaptive value of variegation, as no consistent conclusions about its ecological benefits have been proposed so far. T2 - International Journal of Molecular Sciences T2 - International Journal of Molecular Sciences T1 - Carbon and Nitrogen Allocation between the Sink and Source Leaf Tissue in Response to the Excess Excitation Energy Conditions IS - 3 SP - 2269 VL - 24 DO - 10.3390/ijms24032269 ER -
@article{ author = "Milić, Dejana and Živanović, Bojana and Samardžić, Jelena and Nikolić, Nenad and Cukier, Caroline and Limami, Anis M. and Vidović, Marija", year = "2023", abstract = "Plants are inevitably exposed to extreme climatic conditions that lead to a disturbed balance between the amount of absorbed energy and their ability to process it. Variegated leaves with photosynthetically active green leaf tissue (GL) and photosynthetically inactive white leaf tissue (WL) are an excellent model system to study source–sink interactions within the same leaf under the same microenvironmental conditions. We demonstrated that under excess excitation energy (EEE) conditions (high irradiance and lower temperature), regulated metabolic reprogramming in both leaf tissues allowed an increased consumption of reducing equivalents, as evidenced by preserved maximum efficiency of photosystem II (ФPSII) at the end of the experiment. GL of the EEE-treated plants employed two strategies: (i) the accumulation of flavonoid glycosides, especially cyanidin glycosides, as an alternative electron sink, and (ii) cell wall stiffening by cellulose, pectin, and lignin accumulation. On the other hand, WL increased the amount of free amino acids, mainly arginine, asparagine, branched-chain and aromatic amino acids, as well as kaempferol and quercetin glycosides. Thus, WL acts as an important energy escape valve that is required in order to maintain the successful performance of the GL sectors under EEE conditions. Finally, this role could be an adaptive value of variegation, as no consistent conclusions about its ecological benefits have been proposed so far.", journal = "International Journal of Molecular Sciences, International Journal of Molecular Sciences", title = "Carbon and Nitrogen Allocation between the Sink and Source Leaf Tissue in Response to the Excess Excitation Energy Conditions", number = "3", pages = "2269", volume = "24", doi = "10.3390/ijms24032269" }
Milić, D., Živanović, B., Samardžić, J., Nikolić, N., Cukier, C., Limami, A. M.,& Vidović, M.. (2023). Carbon and Nitrogen Allocation between the Sink and Source Leaf Tissue in Response to the Excess Excitation Energy Conditions. in International Journal of Molecular Sciences, 24(3), 2269. https://doi.org/10.3390/ijms24032269
Milić D, Živanović B, Samardžić J, Nikolić N, Cukier C, Limami AM, Vidović M. Carbon and Nitrogen Allocation between the Sink and Source Leaf Tissue in Response to the Excess Excitation Energy Conditions. in International Journal of Molecular Sciences. 2023;24(3):2269. doi:10.3390/ijms24032269 .
Milić, Dejana, Živanović, Bojana, Samardžić, Jelena, Nikolić, Nenad, Cukier, Caroline, Limami, Anis M., Vidović, Marija, "Carbon and Nitrogen Allocation between the Sink and Source Leaf Tissue in Response to the Excess Excitation Energy Conditions" in International Journal of Molecular Sciences, 24, no. 3 (2023):2269, https://doi.org/10.3390/ijms24032269 . .