scholarly journals Exploiting heterogeneous environments: does photosynthetic acclimation optimize carbon gain in fluctuating light?

2015 ◽  
Vol 66 (9) ◽  
pp. 2437-2447 ◽  
Author(s):  
Renata Retkute ◽  
Stephanie E. Smith-Unna ◽  
Robert W. Smith ◽  
Alexandra J. Burgess ◽  
Oliver E. Jensen ◽  
...  
Keyword(s):  
Photosynthetic Acclimation ◽  
Carbon Gain ◽  
Heterogeneous Environments ◽  
Fluctuating Light

scholarly journals Salt stress and fluctuating light have separate effects on photosynthetic acclimation, but interactively affect biomass

2020 ◽  
Vol 43 (9) ◽  
pp. 2192-2206 ◽  
Author(s):  
Yuqi Zhang ◽  
Elias Kaiser ◽  
Leo F. M. Marcelis ◽  
Qichang Yang ◽  
Tao Li
Keyword(s):  
Salt Stress ◽  
Photosynthetic Acclimation ◽  
Fluctuating Light

scholarly journals High-yielding rice Takanari has superior photosynthetic response to a commercial rice Koshihikari under fluctuating light

2019 ◽  
Vol 70 (19) ◽  
pp. 5287-5297 ◽  
Author(s):  
Shunsuke Adachi ◽  
Yu Tanaka ◽  
Atsuko Miyagi ◽  
Makoto Kashima ◽  
Ayumi Tezuka ◽  
...  
Keyword(s):  
Electron Transport ◽  
Stomatal Conductance ◽  
Metabolic Flux ◽  
Electron Transport Rate ◽  
Rice Cultivar ◽  
Carbon Gain ◽  
High Electron ◽  
Photosynthetic Induction ◽  
Photosynthetic Response ◽  
Fluctuating Light

The high-yielding rice cultivar Takanari has fast photosynthetic induction owing to a high electron transport rate, stomatal conductance, and metabolic flux, leading to high daily carbon gain under fluctuating light.

scholarly journals Drought stress delays photosynthetic induction and accelerates photoinhibition of photosystem I under fluctuating light

2021 ◽  
Author(s):  
Hu Sun ◽  
Qi Shi ◽  
Ning-Yu Liu ◽  
Shi-Bao Zhang ◽  
Wei Huang
Keyword(s):  
Drought Stress ◽  
Gas Exchange ◽  
Photosystem I ◽  
Co2 Fixation ◽  
Electron Flow ◽  
Photosynthetic Performance ◽  
High Light ◽  
Carbon Gain ◽  
Photosynthetic Induction ◽  
Fluctuating Light

Fluctuating light (FL) and drought stress usually occur concomitantly. However, whether drought stress affects photosynthetic performance under FL remains unknown. Here, we measured gas exchange, chlorophyll fluorescence, and P700 redox state under FL in drought-stressed tomato (Solanum lycopersicum) seedlings. Drought stress significantly affected stomatal opening and mesophyll conductance after transition from low to high light and thus delayed photosynthetic induction under FL. Therefore, drought stress exacerbated the loss of carbon gain under FL. Furthermore, restriction of CO2 fixation under drought stress aggravated the over-reduction of photosystem I (PSI) upon transition from low to high light. The resulting stronger FL-induced PSI photoinhibition significantly supressed linear electron flow and PSI photoprotection. These results indicated that drought stress not only affected gas exchange under FL but also accelerated FL-induced photoinhibition of PSI. Furthermore, drought stress enhanced relative cyclic electron flow in FL, which partially compensated for restricted CO2 fixation and thus favored PSI photoprotection under FL. Therefore, drought stress has large effects on photosynthetic dark and light reactions under FL.

scholarly journals Drought stress imposes reversible photosynthetic damage under fluctuating light conditions in crops

2021 ◽  
Author(s):  
Kazuma Sakoda ◽  
Kazuki Taniyoshi ◽  
Wataru Yamori ◽  
Yu Tanaka
Keyword(s):  
Drought Stress ◽  
Photosynthetic Capacity ◽  
Crop Growth ◽  
Growth And Yield ◽  
Carbon Gain ◽  
Limiting Factor ◽  
Photosynthetic Induction ◽  
Light Conditions ◽  
Fluctuating Light ◽  
Dynamic Photosynthesis

Drought stress is a major limiting factor for crop growth and yield. Water availability in the field can cyclically change between drought and rewatering conditions, depending on precipitation patterns. Concurrently, light intensity under field conditions can fluctuate, inducing dynamic photosynthesis and transpiration during crop growth period. The present study aimed to characterize carbon gain and water use in fluctuating light under drought and rewatering conditions by conducting gas exchange measurements in two major crops, namely rice and soybean. In both crops, drought stress reduced steady-state photosynthesis and/or photosynthetic capacity, and delayed photosynthetic induction even when it had relatively small impact on photosynthetic capacity, suggesting that the drought effects on photosynthesis should be evaluated based on induction, maximum, and steady states. This delayed photosynthetic induction resulted in a substantial loss of carbon gain under fluctuating light conditions, which can be a limiting factor for crop growth and yield in the field. Meanwhile, rewatering after drought conditions completely recovered photosynthetic capacity and induction in both crops, whereas drought experience would be memorized to slow down the stomatal opening. Therefore, the stability of photosynthetic induction can be a promising target to improve drought tolerance during crop breeding in the future.

scholarly journals Drought stress delays photosynthetic induction and accelerates photoinhibition of photosystem I under fluctuating light

2021 ◽  
Author(s):  
Hu Sun ◽  
Qi Shi ◽  
Ning-Yu Liu ◽  
Shi-Bao Zhang ◽  
Wei Huang
Keyword(s):  
Drought Stress ◽  
Gas Exchange ◽  
Photosystem I ◽  
Co2 Fixation ◽  
Electron Flow ◽  
Photosynthetic Performance ◽  
High Light ◽  
Carbon Gain ◽  
Photosynthetic Induction ◽  
Fluctuating Light

Fluctuating light (FL) and drought stress usually occur concomitantly. However, whether drought stress affects photosynthetic performance under FL remains unknown. Here, we measured gas exchange, chlorophyll fluorescence, and P700 redox state under FL in drought-stressed tomato (Solanum lycopersicum) seedlings. Drought stress significantly affected stomatal opening and mesophyll conductance after transition from low to high light and thus delayed photosynthetic induction under FL. Therefore, drought stress exacerbated the loss of carbon gain under FL. Furthermore, restriction of CO2 fixation under drought stress aggravated the over-reduction of photosystem I (PSI) upon transition from low to high light. The resulting stronger FL-induced PSI photoinhibition significantly supressed linear electron flow and PSI photoprotection. These results indicated that drought stress not only affected gas exchange under FL but also accelerated FL-induced photoinhibition of PSI. Furthermore, drought stress enhanced relative cyclic electron flow in FL, which partially compensated for restricted CO2 fixation and thus favored PSI photoprotection under FL. Therefore, drought stress has large effects on photosynthetic dark and light reactions under FL.

scholarly journals A Holistic Approach to Study Photosynthetic Acclimation Responses of Plants to Fluctuating Light

2021 ◽  
Vol 12 ◽  
Author(s):  
Armida Gjindali ◽  
Helena A. Herrmann ◽  
Jean-Marc Schwartz ◽  
Giles N. Johnson ◽  
Pablo I. Calzadilla
Keyword(s):  
Mathematical Modeling ◽  
Photosynthetic Apparatus ◽  
Holistic Approach ◽  
Photosynthetic Acclimation ◽  
Natural Environments ◽  
Short Term ◽  
Fluctuating Light ◽  
Photosynthetic Responses ◽  
Over Time

Plants in natural environments receive light through sunflecks, the duration and distribution of these being highly variable across the day. Consequently, plants need to adjust their photosynthetic processes to avoid photoinhibition and maximize yield. Changes in the composition of the photosynthetic apparatus in response to sustained changes in the environment are referred to as photosynthetic acclimation, a process that involves changes in protein content and composition. Considering this definition, acclimation differs from regulation, which involves processes that alter the activity of individual proteins over short-time periods, without changing the abundance of those proteins. The interconnection and overlapping of the short- and long-term photosynthetic responses, which can occur simultaneously or/and sequentially over time, make the study of long-term acclimation to fluctuating light in plants challenging. In this review we identify short-term responses of plants to fluctuating light that could act as sensors and signals for acclimation responses, with the aim of understanding how plants integrate environmental fluctuations over time and tailor their responses accordingly. Mathematical modeling has the potential to integrate physiological processes over different timescales and to help disentangle short-term regulatory responses from long-term acclimation responses. We review existing mathematical modeling techniques for studying photosynthetic responses to fluctuating light and propose new methods for addressing the topic from a holistic point of view.

scholarly journals Rate of photosynthetic acclimation to fluctuating light varies widely among genotypes of wheat

2018 ◽  
Author(s):  
William T. Salter ◽  
Andrew M. Merchant ◽  
Richard A. Richards ◽  
Richard Trethowan ◽  
Thomas N. Buckley
Keyword(s):  
Carbon Assimilation ◽  
High Light ◽  
Carbon Gain ◽  
Controlled Environment ◽  
Induction Kinetics ◽  
Fluctuating Light ◽  
Speed Up ◽  
Preliminary Study ◽  
First Time ◽  
Kinetics Of

HighlightSignificant variation exists in the acclimation time of photosynthesis following dark-to-light transitions across wheat genotypes, under field and controlled conditions. Slow acclimation reduced daily carbon assimilation by up to 16%.AbstractCrop photosynthesis and yield are limited by slow photosynthetic induction in sunflecks. We quantified variation in induction kinetics across diverse genotypes of wheat for the first time. In a preliminary study using penultimate leaves of 58 genotypes grown in the field, we measured induction kinetics for maximum assimilation rate (Amax) after a shift from full darkness to saturating light (1700 μmol m−2 s−1) with 1-4 replicates per genotype. We then grew 10 of these genotypes with contrasting responses in a controlled environment and quantified induction kinetics of carboxylation capacity (Vcmax) from dynamic A vs ci curves after a shift from low to high light (50 to 1500 μmol m−2 s−1), with 5 replicates per genotype. Within-genotype median time for 95% induction (t95) varied from 8.4 to 23.7 min across genotypes for Amax in field-grown penultimate leaves, and from 6.7 to 10.4 min for Vcmaxin chamber-grown flag leaves. Our simulations suggested that non-instantaneous acclimation reduces daily net carbon gain by up to 16%, and that breeding to speed up Vcmax induction in the slowest genotype to match that in the fastest genotype could increase daily net carbon gain by more than 4%, particularly for leaves that experience predominantly short-duration sunflecks.

scholarly journals Ion antiport accelerates photosynthetic acclimation in fluctuating light environments

2014 ◽  
Vol 5 (1) ◽  
Author(s):  
Ute Armbruster ◽  
L. Ruby Carrillo ◽  
Kees Venema ◽  
Lazar Pavlovic ◽  
Elisabeth Schmidtmann ◽  
...  
Keyword(s):  
Photosynthetic Acclimation ◽  
Fluctuating Light
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