Red-Light Transmittance Changes in Variegated Pelargonium zonale—Diurnal Variation in Chloroplast Movement and Photosystem II Efficiency
Authors
Veljović-Jovanović, Sonjakasalica, becko
Miletić, Katarina
Vidović, Marija
Šušić, Nikola
Jeremić, Dejan
Belča, Ivan
Article (Published version)
Metadata
Show full item recordAbstract
Chloroplast movement rapidly ameliorates the effects of suboptimal light intensity by accumulating along the periclinal cell walls, as well as the effects of excess light by shifting to the anticlinal cell walls. These acclimation responses are triggered by phototropins located at the plasma membrane and chloroplast envelope. Here, we used a recently developed non-invasive system sensitive to very small changes in red light leaf transmittance to perform long-term continuous measurements of dark–light transitions. As a model system, we used variegated Pelargonium zonale leaves containing green sectors (GS) with fully developed chloroplasts and achlorophyllous, white sectors (WS) with undifferentiated plastids, and higher phototropin expression levels. We observed biphasic changes in the red-light transmittance and oscillations triggered by medium intensities of white light, described by a transient peak preceded by a constant decrease in transmittance level. A slight change in red-light... transmittance was recorded even in WS. Furthermore, the chloroplast position at lower light intensities affected the rapid light curves, while high light intensity decreased saturated electron transport, maximum quantum efficiency of photosystem II, and increased non-photochemical quenching of chlorophyll fluorescence and epidermal flavonoids. Our results extend the knowledge of light-dependent chloroplast movements and thus contribute to a better understanding of their role in regulating photosynthesis under fluctuating light conditions.
Keywords:
chloroplast movement / red-light transmittance / dark–light transition / blue-light receptors / phototropins / variegated Pelargonium zonaleSource:
International Journal of Molecular Sciences, 2023, 24, 18, 1-16Publisher:
- MDPI
Funding / projects:
- Modulation of antioxidative metabolism in plants for improvement of plant abiotic stress tolerance and identification of new biomarkers for application in remediation and monitoring of degraded biotopes (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-43010)
Collections
Institution/Community
Institut za multidisciplinarna istraživanjaTY - JOUR AU - Veljović-Jovanović, Sonja AU - kasalica, becko AU - Miletić, Katarina AU - Vidović, Marija AU - Šušić, Nikola AU - Jeremić, Dejan AU - Belča, Ivan PY - 2023 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/2363 AB - Chloroplast movement rapidly ameliorates the effects of suboptimal light intensity by accumulating along the periclinal cell walls, as well as the effects of excess light by shifting to the anticlinal cell walls. These acclimation responses are triggered by phototropins located at the plasma membrane and chloroplast envelope. Here, we used a recently developed non-invasive system sensitive to very small changes in red light leaf transmittance to perform long-term continuous measurements of dark–light transitions. As a model system, we used variegated Pelargonium zonale leaves containing green sectors (GS) with fully developed chloroplasts and achlorophyllous, white sectors (WS) with undifferentiated plastids, and higher phototropin expression levels. We observed biphasic changes in the red-light transmittance and oscillations triggered by medium intensities of white light, described by a transient peak preceded by a constant decrease in transmittance level. A slight change in red-light transmittance was recorded even in WS. Furthermore, the chloroplast position at lower light intensities affected the rapid light curves, while high light intensity decreased saturated electron transport, maximum quantum efficiency of photosystem II, and increased non-photochemical quenching of chlorophyll fluorescence and epidermal flavonoids. Our results extend the knowledge of light-dependent chloroplast movements and thus contribute to a better understanding of their role in regulating photosynthesis under fluctuating light conditions. PB - MDPI T2 - International Journal of Molecular Sciences T1 - Red-Light Transmittance Changes in Variegated Pelargonium zonale—Diurnal Variation in Chloroplast Movement and Photosystem II Efficiency EP - 16 IS - 18 SP - 1 VL - 24 DO - 10.3390/ijms241814265 ER -
@article{ author = "Veljović-Jovanović, Sonja and kasalica, becko and Miletić, Katarina and Vidović, Marija and Šušić, Nikola and Jeremić, Dejan and Belča, Ivan", year = "2023", abstract = "Chloroplast movement rapidly ameliorates the effects of suboptimal light intensity by accumulating along the periclinal cell walls, as well as the effects of excess light by shifting to the anticlinal cell walls. These acclimation responses are triggered by phototropins located at the plasma membrane and chloroplast envelope. Here, we used a recently developed non-invasive system sensitive to very small changes in red light leaf transmittance to perform long-term continuous measurements of dark–light transitions. As a model system, we used variegated Pelargonium zonale leaves containing green sectors (GS) with fully developed chloroplasts and achlorophyllous, white sectors (WS) with undifferentiated plastids, and higher phototropin expression levels. We observed biphasic changes in the red-light transmittance and oscillations triggered by medium intensities of white light, described by a transient peak preceded by a constant decrease in transmittance level. A slight change in red-light transmittance was recorded even in WS. Furthermore, the chloroplast position at lower light intensities affected the rapid light curves, while high light intensity decreased saturated electron transport, maximum quantum efficiency of photosystem II, and increased non-photochemical quenching of chlorophyll fluorescence and epidermal flavonoids. Our results extend the knowledge of light-dependent chloroplast movements and thus contribute to a better understanding of their role in regulating photosynthesis under fluctuating light conditions.", publisher = "MDPI", journal = "International Journal of Molecular Sciences", title = "Red-Light Transmittance Changes in Variegated Pelargonium zonale—Diurnal Variation in Chloroplast Movement and Photosystem II Efficiency", pages = "16-1", number = "18", volume = "24", doi = "10.3390/ijms241814265" }
Veljović-Jovanović, S., kasalica, b., Miletić, K., Vidović, M., Šušić, N., Jeremić, D.,& Belča, I.. (2023). Red-Light Transmittance Changes in Variegated Pelargonium zonale—Diurnal Variation in Chloroplast Movement and Photosystem II Efficiency. in International Journal of Molecular Sciences MDPI., 24(18), 1-16. https://doi.org/10.3390/ijms241814265
Veljović-Jovanović S, kasalica B, Miletić K, Vidović M, Šušić N, Jeremić D, Belča I. Red-Light Transmittance Changes in Variegated Pelargonium zonale—Diurnal Variation in Chloroplast Movement and Photosystem II Efficiency. in International Journal of Molecular Sciences. 2023;24(18):1-16. doi:10.3390/ijms241814265 .
Veljović-Jovanović, Sonja, kasalica, becko, Miletić, Katarina, Vidović, Marija, Šušić, Nikola, Jeremić, Dejan, Belča, Ivan, "Red-Light Transmittance Changes in Variegated Pelargonium zonale—Diurnal Variation in Chloroplast Movement and Photosystem II Efficiency" in International Journal of Molecular Sciences, 24, no. 18 (2023):1-16, https://doi.org/10.3390/ijms241814265 . .