ACCLIMATION OF PEDUNCULATE OAK SEEDLINGS TO DIFFERENT LIGHT CONDITIONS IN THE FIRST MONTHS AFTER GERMINATION
Authors
Šušić, Nikola
Milić Komić, Sonja

Živanović, Bojana

Jelušić, Aleksandra

Marković, Sanja

Sedlarevic Zoric, Ana
Veljović-Jovanović, Sonja

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The first months are the most sensitive phase of oak seedling development. Light conditions have an important role in this sense, both from the physiological and management viewpoint. We investigated the response of pedunculate oak seedlings to three growth light intensities (100, 550 and 2000 μmol cm−2s−1) during development of the first and second growth flush. The low and high light intensities of PAR are supposed to mimic the effects of solar radiation under extreme natural conditions (closed canopy and open field). The response of seedlings to different light intensities was evaluated by determining the photochemical activity of photosystem II, leaf chlorophyll concentration and epidermal flavonoid accumulation for both growth flushes. At the end of the experiment (after 4.5 months) the effects of different treatments on growth parameters were also determined. We showed here that oak seedlings responded to varying light intensities by modifying their physiological and morphologica...l traits of successive growth flushes. At medium light, seedlings had the highest PSII photochemical activity in the 2nd flush. High light induced very low photochemical efficiency of photosystem II in both growth flushes indicating the development of high non-photochemical quenching of chlorophyll fluorescence as part of photoprotective mechanism. In accordance with high photosynthetic yield at ML, the investment of photosynthates in growth, especially biomass allocation towards root system was confirmed. ML was optimal for seedling development in the first months. The results may contribute to a better understanding of oak seedling development and acclimation and could have importance for oak natural regeneration.
Keywords:
growth flush / photochemical efficiency / morphological parametersSource:
30th INTERNATIONAL CONFERENCE ECOLOGICAL TRUTH AND ENVIRONMENTAL RESEARCH – EcoTER’23, 2023, 135-140Publisher:
- University of Belgrade, Technical Faculty in Bor
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Institut za multidisciplinarna istraživanjaTY - CONF AU - Šušić, Nikola AU - Milić Komić, Sonja AU - Živanović, Bojana AU - Jelušić, Aleksandra AU - Marković, Sanja AU - Sedlarevic Zoric, Ana AU - Veljović-Jovanović, Sonja PY - 2023 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/1984 AB - The first months are the most sensitive phase of oak seedling development. Light conditions have an important role in this sense, both from the physiological and management viewpoint. We investigated the response of pedunculate oak seedlings to three growth light intensities (100, 550 and 2000 μmol cm−2s−1) during development of the first and second growth flush. The low and high light intensities of PAR are supposed to mimic the effects of solar radiation under extreme natural conditions (closed canopy and open field). The response of seedlings to different light intensities was evaluated by determining the photochemical activity of photosystem II, leaf chlorophyll concentration and epidermal flavonoid accumulation for both growth flushes. At the end of the experiment (after 4.5 months) the effects of different treatments on growth parameters were also determined. We showed here that oak seedlings responded to varying light intensities by modifying their physiological and morphological traits of successive growth flushes. At medium light, seedlings had the highest PSII photochemical activity in the 2nd flush. High light induced very low photochemical efficiency of photosystem II in both growth flushes indicating the development of high non-photochemical quenching of chlorophyll fluorescence as part of photoprotective mechanism. In accordance with high photosynthetic yield at ML, the investment of photosynthates in growth, especially biomass allocation towards root system was confirmed. ML was optimal for seedling development in the first months. The results may contribute to a better understanding of oak seedling development and acclimation and could have importance for oak natural regeneration. PB - University of Belgrade, Technical Faculty in Bor C3 - 30th INTERNATIONAL CONFERENCE ECOLOGICAL TRUTH AND ENVIRONMENTAL RESEARCH – EcoTER’23 T1 - ACCLIMATION OF PEDUNCULATE OAK SEEDLINGS TO DIFFERENT LIGHT CONDITIONS IN THE FIRST MONTHS AFTER GERMINATION EP - 140 SP - 135 UR - https://hdl.handle.net/21.15107/rcub_rimsi_1984 ER -
@conference{ author = "Šušić, Nikola and Milić Komić, Sonja and Živanović, Bojana and Jelušić, Aleksandra and Marković, Sanja and Sedlarevic Zoric, Ana and Veljović-Jovanović, Sonja", year = "2023", abstract = "The first months are the most sensitive phase of oak seedling development. Light conditions have an important role in this sense, both from the physiological and management viewpoint. We investigated the response of pedunculate oak seedlings to three growth light intensities (100, 550 and 2000 μmol cm−2s−1) during development of the first and second growth flush. The low and high light intensities of PAR are supposed to mimic the effects of solar radiation under extreme natural conditions (closed canopy and open field). The response of seedlings to different light intensities was evaluated by determining the photochemical activity of photosystem II, leaf chlorophyll concentration and epidermal flavonoid accumulation for both growth flushes. At the end of the experiment (after 4.5 months) the effects of different treatments on growth parameters were also determined. We showed here that oak seedlings responded to varying light intensities by modifying their physiological and morphological traits of successive growth flushes. At medium light, seedlings had the highest PSII photochemical activity in the 2nd flush. High light induced very low photochemical efficiency of photosystem II in both growth flushes indicating the development of high non-photochemical quenching of chlorophyll fluorescence as part of photoprotective mechanism. In accordance with high photosynthetic yield at ML, the investment of photosynthates in growth, especially biomass allocation towards root system was confirmed. ML was optimal for seedling development in the first months. The results may contribute to a better understanding of oak seedling development and acclimation and could have importance for oak natural regeneration.", publisher = "University of Belgrade, Technical Faculty in Bor", journal = "30th INTERNATIONAL CONFERENCE ECOLOGICAL TRUTH AND ENVIRONMENTAL RESEARCH – EcoTER’23", title = "ACCLIMATION OF PEDUNCULATE OAK SEEDLINGS TO DIFFERENT LIGHT CONDITIONS IN THE FIRST MONTHS AFTER GERMINATION", pages = "140-135", url = "https://hdl.handle.net/21.15107/rcub_rimsi_1984" }
Šušić, N., Milić Komić, S., Živanović, B., Jelušić, A., Marković, S., Sedlarevic Zoric, A.,& Veljović-Jovanović, S.. (2023). ACCLIMATION OF PEDUNCULATE OAK SEEDLINGS TO DIFFERENT LIGHT CONDITIONS IN THE FIRST MONTHS AFTER GERMINATION. in 30th INTERNATIONAL CONFERENCE ECOLOGICAL TRUTH AND ENVIRONMENTAL RESEARCH – EcoTER’23 University of Belgrade, Technical Faculty in Bor., 135-140. https://hdl.handle.net/21.15107/rcub_rimsi_1984
Šušić N, Milić Komić S, Živanović B, Jelušić A, Marković S, Sedlarevic Zoric A, Veljović-Jovanović S. ACCLIMATION OF PEDUNCULATE OAK SEEDLINGS TO DIFFERENT LIGHT CONDITIONS IN THE FIRST MONTHS AFTER GERMINATION. in 30th INTERNATIONAL CONFERENCE ECOLOGICAL TRUTH AND ENVIRONMENTAL RESEARCH – EcoTER’23. 2023;:135-140. https://hdl.handle.net/21.15107/rcub_rimsi_1984 .
Šušić, Nikola, Milić Komić, Sonja, Živanović, Bojana, Jelušić, Aleksandra, Marković, Sanja, Sedlarevic Zoric, Ana, Veljović-Jovanović, Sonja, "ACCLIMATION OF PEDUNCULATE OAK SEEDLINGS TO DIFFERENT LIGHT CONDITIONS IN THE FIRST MONTHS AFTER GERMINATION" in 30th INTERNATIONAL CONFERENCE ECOLOGICAL TRUTH AND ENVIRONMENTAL RESEARCH – EcoTER’23 (2023):135-140, https://hdl.handle.net/21.15107/rcub_rimsi_1984 .