Plant Physiology and Biochemistry, Год журнала: 2024, Номер 216, С. 109115 - 109115
Опубликована: Сен. 10, 2024
Язык: Английский
Journal of Experimental Botany, Год журнала: 2024, Номер 75(21), С. 6733 - 6747
Опубликована: Май 23, 2024
Recent research has shown that optimizing photosynthetic and stomatal traits holds promise for improved crop performance. However, standard phenotyping tools such as gas exchange systems have limited throughput. In this work, a novel approach based on bespoke chamber allowing combined measurement of the quantum yield PSII (Fq'/Fm'), with an estimation conductance via thermal imaging was used to phenotype range bread wheat (Triticum aestivum L.) genotypes. Using dual-imaging methods traditional approaches, we found broad significant variation in key traits, including CO2 uptake at saturating light ambient concentration (Asat), elevated (Amax), maximum velocity Rubisco carboxylation (Vcmax), time opening (Ki), leaf evaporative cooling. Anatomical analysis revealed flag adaxial density. Associations between highlighted relationships cooling, conductance, Fq'/Fm', highlighting importance rapidity maintaining optimal temperature photosynthesis wheat. Additionally, gsmin gsmax were positively associated, indicating potential combinations preferable (i.e. inherently high gsmax, low Ki, maintained cooling) are present This work highlights effectiveness screening dynamic gs panel The wide phenotypic observed suggested presence exploitable genetic variability capacity targeted optimization within future breeding programmes.
Язык: Английский
Процитировано
5
Plants, Год журнала: 2025, Номер 14(6), С. 850 - 850
Опубликована: Март 8, 2025
Mesophyll conductance to CO2 (gm) act as a significant limiting factor influencing the assimilation rate (AN) during photosynthetic induction. However, effect of vapor pressure deficit (VPD) on gm kinetics light induction is not well clarified. We combined gas exchange with chlorophyll fluorescence measurements assess under contrasting in two tree species different stomatal (gs) behavior, Catalpa fargesii and Pterocarya stenoptera. Our results revealed three key findings: (1) coordination gs occurred C. but P. stenoptera, model largely determines whether exist given species; (2) high VPD induced simultaneous changes had separated effects indicating that response differs between (3) relative contribution photorespiration total electron flow was flexible change diffusional biochemical limitations, pointing out has role regulation These provide new sight into species-dependent
Язык: Английский
Процитировано
0
Scientific Reports, Год журнала: 2025, Номер 15(1)
Опубликована: Апрель 21, 2025
Abstract Stomata play a crucial role in balancing carbon dioxide uptake and water vapor loss, thereby regulating plant use efficiency (WUE). Enhancing WUE is important for sustainable agriculture food security, particularly crops such as maize ( Zea mays L.), climate change growing global demand exacerbate limitations on availability. Genetic factors controlling stomatal density levels of the hormone abscisic acid (ABA) leaves, which affect aperture, are key determinants conductance (g s ) intrinsic (iWUE). In this study, we demonstrate that aperture have combined effect g iWUE maize. Using near-isogenic lines (NILs) CRISPR/Cas9 mutants, show combining reduced can improve without compromising photosynthesis. This pronounced at both, optimal high temperatures. These findings highlight potential targeting multiple traits through genetic stacking to enhance WUE, offering promising strategy crop adaptation water-limited environments.
Язык: Английский
Процитировано
0
Physiologia Plantarum, Год журнала: 2025, Номер 177(3)
Опубликована: Май 1, 2025
Abstract An increase in global demand for crop‐based products necessitates an increased crop yield. Optimizing photosynthesis, which is sensitive to environmental fluctuations, offers a promising strategy improve yield and resilience. Photosynthetic responses often lag behind changes irradiance, resulting the loss of potential carbon gain. Additionally, warming accompanied by unexpected chilling spells, further affecting photosynthesis. Thus, developing chilling‐resilient crops optimizing photosynthetic fluctuating light critical. This can be achieved identifying genetic markers associated with desirable traits plant populations. However, combined effect remains unexplored, there lack populations designed explore these responses. exploration needs done pre‐existing where phenotypic variation how affects within parental lines. study examined lines Multi‐parent‐Advanced‐Generation Inter‐Cross (MAGIC) population tomato ( Solanum lycopersicum ) under suboptimal temperatures. step increases decreases irradiance were measured using modulated chlorophyll fluorescence lowered temperature (14°C) on was investigated. The results showed kinetics response quantum efficiency PSII (Φ control conditions. Chilling had minimal some lines, indicating resilience chilling. These findings highlight exploring components breed climate‐resilient crops.
Язык: Английский
Процитировано
0
Physiologia Plantarum, Год журнала: 2024, Номер 176(4)
Опубликована: Июль 1, 2024
Abstract Considering the prevalence of ever‐changing conditions in natural world, investigation photosynthetic responses C 4 plants under fluctuating light is needed. Here, we studied effect dynamic illumination on photosynthesis totally 10 3 , –C intermediate, ‐like and dicots monocots at CO 2 concentrations 400 800 μmol mol −1 . had faster induction light‐induced stomatal dynamics than but not which supply rarely limits photosynthesis. a higher water use efficiency both concentrations. There were positive correlations between response, together with compensation point, was parameter ‐concentrating mechanism These results clearly show that adapts to more efficiently The rapid response can be attributed dynamics, or both.
Язык: Английский
Процитировано
1
Journal of Experimental Botany, Год журнала: 2024, Номер 75(21), С. 6677 - 6682
Опубликована: Ноя. 11, 2024
Язык: Английский
Процитировано
1
Plants, Год журнала: 2024, Номер 14(1), С. 47 - 47
Опубликована: Дек. 27, 2024
The relative impacts of biochemical and stomatal limitations on photosynthesis during photosynthetic induction have been well studied for diverse plants under ambient CO2 concentration (Ca). However, a knowledge gap remains regarding how the various components limit duction efficiency elevated CO2. In this study, we experimentally investigated influence (from 400 to 800 μmol mol–1) dynamics its associated limitation in two broadleaved tree species, Populus tomentosa Eucalyptus robusta. results show that increased steady-state rate (A) decreased conductance (gs) maximum carboxylation (Vcmax) both species. While E. robusta exhibited decrease linear electron transport (J) fraction open reaction centers II (qL), P. showed significant increase non-photochemical quenching (NPQ). With respect non-steady-state photosynthesis, significantly reduced time A following shift from low high light intensity Time-integrated analysis revealed reduces consequently shifting predominant components. Additionally, species-specific changes qL NPQ suggest may by affecting energy allocation between carbon fixation photoprotection. These findings that, future CO2-rich atmosphere, productivity fluctuating be primarily constrained photochemical quenching.
Язык: Английский
Процитировано
1
Plant Physiology and Biochemistry, Год журнала: 2024, Номер 216, С. 109115 - 109115
Опубликована: Сен. 10, 2024
Язык: Английский
Процитировано
0