Article
Plant Sciences
Sylvain Pincebourde, Jerome Ngao
Summary: Research shows that leaf age affects leaf gas exchange, with herbivore insects altering these effects. Young leaves maintain steady gas exchange rates after infestation, but as they age, infested leaves show increased photosynthesis, stomatal conductance, and transpiration rates, gradually decreasing thereafter.
FRONTIERS IN PLANT SCIENCE
(2021)
Review
Plant Sciences
Jiri Santrucek
Summary: This study investigates the contribution of hidden stomata and superficial stomata to transpiration at night. The results show that hidden stomata contribute less to total transpiration and their contribution decreases significantly with increasing transpiration, while superficial stomata maintain a consistent contribution across a wide range of transpiration. The specific behavior of hidden stomata and the evolutionary origin of sunken stomata are discussed.
Article
Forestry
Kenneth J. Davidson, Julien Lamour, Alistair Rogers, Shawn P. Serbin
Summary: Many terrestrial biosphere models rely on the relationship between stomatal conductance and photosynthesis. This study found that the choice of measurement method can impact parameters representing stomatal response, with afternoon measurements resulting in significantly different values. These differences in parameter estimates directly affect canopy function models.
Article
Biochemistry & Molecular Biology
Miao Ye, Zhengcan Zhang, Guanjun Huang, Yong Li
Summary: This study investigated the effects of leaf anatomical traits and environmental stimuli on the photosynthesis of rice plants. It found that the response of mesophyll conductance to temperature was stronger at the mid-tillering stage and with high nitrogen treatment, which could be attributed to a higher activation energy of the membrane.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Plant Sciences
Liang Liu, Lihua Hao, Yunxin Zhang, Haoran Zhou, Baoguo Ma, Yao Cheng, Yinshuai Tian, Zhijie Chang, Yunpu Zheng
Summary: Understanding the effects of elevated CO2 concentration and temperature on leaf photosynthesis in maize is important for estimating the impacts of climate change. This study found that increasing temperature enhanced leaf photosynthesis, but at higher temperatures, leaf photosynthesis decreased. Elevated CO2 concentration had a fertilization effect on leaf photosynthesis at high temperatures, and also resulted in an increase in leaf soluble sugar content. Additionally, elevated CO2 concentration decreased leaf transpiration rates.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Plant Sciences
Bishal G. Tamang, Yanqun Zhang, Michelle A. Zambrano, Elizabeth A. Ainsworth
Summary: This study found that narrow leaves in soybean are thicker and have a higher proportion of spongy mesophyll, while the proportions of palisade and paraveinal mesophyll are lower. In addition, narrow and thicker leaves have higher photosynthesis and stomata conductance per unit area, along with greater leaf hydraulic conductance. Therefore, selecting for narrow leaves can improve photosynthetic performance and potentially increase soybean yield.
Article
Plant Sciences
Jean Paulo Vitor de Oliveira, Vinicius Politi Duarte, Evaristo Mauro de Castro, Paulo Cesar Magalhaes, Fabricio Jose Pereira
Summary: The study found that lower water levels did not significantly affect the growth, leaf area, and gas exchange of Sorghum bicolor but increased root biomass. Lower water levels increased the intercellular CO2 percentage and proportion of stomatal cavities, promoting minor changes in leaf tissue and stomatal traits.
Article
Agriculture, Multidisciplinary
Kuldeep Singh, O. P. Awasthi, Awtar Singh, Reena Prusty, Prachi Yadav
Summary: This study investigated the effects of varying doses of gamma rays on mutated populations of sweet orange, showing significant alterations in leaf characteristics, photosynthesis, and anatomical features. The mutations displayed dose-dependent responses, with varying impacts on leaf traits and physiological processes. These findings suggest potential criteria for selecting improved sweet orange varieties.
INDIAN JOURNAL OF AGRICULTURAL SCIENCES
(2021)
Article
Plant Sciences
Wachira Suwannarut, Silvere Vialet-Chabrand, Elias Kaiser
Summary: This study reveals diurnal changes in photosynthesis and stomatal conductance in tropical species, showing differences between the fig and sugarcane in their responses to irradiance. These findings highlight the importance of understanding diurnal rhythms in plant physiological processes.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Agronomy
Tomas Uksas, Povilas Algimantas Sirvydas, Simona Paulikien, Rasa Cingiene
Summary: In the technical field, gas potential energy is converted into mechanical kinetic energy through special channels, while leaf stomata perform a similar function in plants. The complex channels in leaf stomata are more sophisticated than those in energy production facilities. The experimental research presented in the paper shows that plant leaf stomata can convert thermal energy into mechanical kinetic energy of the flow, demonstrating the presence of a biological heat engine in plant leaves. The rotation movements of plant leaves in response to light sources of varying intensity were studied, showing different angles and speeds of rotation depending on the area of the plant leaf and the power of the light source.
Article
Plant Sciences
Ibrahim Bourbia, Christopher Lucani, Madeline R. Carins-Murphy, Alistair Gracie, Timothy J. Brodribb
Summary: A novel method for in situ assessment of whole-plant stomatal responses to VPD was developed in Tanacetum cinerariifolium. The results showed a two-phase response of g(c) in glasshouse plants, with a similar pattern in field plants but with a lower VPD threshold.
PLANT CELL AND ENVIRONMENT
(2023)
Article
Plant Sciences
Miao Ye, Meng Wu, Hao Zhang, Zuolin Zhang, Zujian Zhang
Summary: The study found that leaf vein density, especially minor vein density, plays a crucial role in leaf water exchange and photosynthesis in rice plants, while the ratio of minor vein length to total vein length does not have a significant impact on leaf hydraulics and gas exchange.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Plant Sciences
Silvere Vialet-Chabrand, Jack S. A. Matthews, Tracy Lawson
Summary: This study found that different species have significant differences in blue light-induced stomatal responses, with increased stomatal conductance reducing photosynthetic limitation but increasing water loss. Additionally, the synergistic effect of blue light and respiration plays an important role in driving rapid stomatal movements, especially when photosynthesis is limited.
Article
Plant Sciences
Nikolaos Konstantis, Konstantinos Koskorellos, Areti Balou, Athina Paravolidaki, George Garantziotis, Christina Eleni Koulopoulou, Athanasios Koulopoulos, George Zervoudakis
Summary: This study measured physiological parameters of wounded plants at different developmental stages and found that the plants' response to leaf wounding varied depending on the developmental stage. Basil plants at the vegetative stage were found to be more tolerant to leaf wounding compared to those at the budding and flowering stages.
Article
Biotechnology & Applied Microbiology
Xiuying Liang, Xichen Xu, Zhiwei Wang, Lei He, Kaiqi Zhang, Bo Liang, Junli Ye, Jiawei Shi, Xi Wu, Mingqiu Dai, Wanneng Yang
Summary: A new method was proposed to automatically and nondestructively measure stomatal traits, utilizing portable microscopes and different models to detect and extract stomatal features; The study found that mutant plants exhibited higher resilience in stomatal traits compared to wild-type under different conditions; The development of a method for measuring stomatal traits across multiple species and a user-friendly web portal were highlighted.
PLANT BIOTECHNOLOGY JOURNAL
(2022)
Article
Ecology
Elizabeth J. Trevenen, Erik J. Veneklaas, Francois P. Teste, Mark P. Dobrowolski, Ladislav Mucina, Michael Renton
Summary: The study found that the diversity of plant communities is influenced by the network architecture of heterospecific plant interactions, with negative conspecific interactions generally promoting alpha diversity and reducing beta diversity, while positive heterospecific ring interactions can lead to the greatest long-term diversity.
FUNCTIONAL ECOLOGY
(2022)
Article
Plant Sciences
Gian Luca Borghi, Stephanie Arrivault, Manuela Guenther, David Barbosa Medeiros, Emilia Dell'Aversana, Giovanna Marta Fusco, Petronia Carillo, Martha Ludwig, Alisdair R. Fernie, John E. Lunn, Mark Stitt
Summary: Metabolite profiling and (13)CO(2)labelling studies of Flaveria species reveal the progressive re-wiring of various metabolic processes in the evolution from C(3)to C(4)photosynthesis. This includes the relocation of enzymes, establishment of shuttles, and changes in the concentration of organic acids. The findings support current models and provide further insights into the evolutionary path of C(4)photosynthesis in the genus Flaveria.
JOURNAL OF EXPERIMENTAL BOTANY
(2022)
Article
Plant Sciences
Victoria C. Clarke, Annamaria De Rosa, Baxter Massey, Aleu Mani George, John R. Evans, Susanne von Caemmerer, Michael Groszmann
Summary: Increasing mesophyll conductance can improve the efficiency of C-3 photosynthesis, but attempts to enhance it through modified aquaporin activity were unsuccessful.
JOURNAL OF EXPERIMENTAL BOTANY
(2022)
Article
Environmental Sciences
Paul L. Drake, Nikolaus J. Callow, Matthias Leopold, Rodrigo N. Pires, Erik J. Veneklaas
Summary: Our study investigates the impact of water dynamics on tree mortality during drought by combining approaches from ecophysiology, geophysics, and remote sensing. We found that different tree species have varying water uptake and use strategies, with some species tightly regulating their water status and others allowing it to fluctuate. These differences can affect water availability and hydraulic gradient during prolonged droughts.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Ecology
Caroline A. Canham, Calum Woods, Samantha A. Setterfield, Erik J. Veneklaas, Fiona L. Freestone, Leah S. Beesley, Michael M. Douglas
Summary: Riparian trees are crucial for freshwater ecosystems, but they are being impacted by human-induced changes to water regimes around the world. This study focused on the Fitzroy River in Australia and used a trait-based approach to understand the distribution of nine riparian tree species along a hydrological gradient. The study found that leaf traits and water availability traits were related to species' habitat preferences. Additionally, lower stem specific density values may indicate flood adaptation. Differences in leaf traits were primarily driven by the distinction between evergreen Myrtaceous and deciduous non-Myrtaceous species, rather than hydrological habitat preferences.
Article
Forestry
Mohitul Hossain, Erik Veneklaas, Giles Hardy, Pieter Poot
Summary: This study found that climate significantly influences disease susceptibility and growth of marri trees. Provenances from drier regions showed higher susceptibility to the fungal pathogen, with faster canker development during the initial wetter growing period. There were no significant differences in leaf water status, photosynthetic rates, or growth rates between provenances. Canker infection reduced photosynthetic rates and growth rates, but only during the later part of the terminal drought period.
Review
Plant Sciences
Andres Garcia, Oorbessy Gaju, Andrew F. Bowerman, Sally A. Buck, John R. Evans, Robert T. Furbank, Matthew Gilliham, A. Harvey Millar, Barry J. Pogson, Matthew P. Reynolds, Yong-Ling Ruan, Nicolas L. Taylor, Stephen D. Tyerman, Owen K. Atkin
Summary: This review explores the potential to increase crop yield potential by optimizing the efficiency of converting light energy into biomass, respiratory ATP production, and ATP use. By targeting factors such as photoprotective machinery, enzymatic kinetics, and metabolic pathways, it is possible to significantly enhance the yield potential of globally important crops.
Article
Plant Sciences
Alex Wu, Jason Brider, Florian A. Busch, Min Chen, Karine Chenu, Victoria C. Clarke, Brian Collins, Maria Ermakova, John R. Evans, Graham D. Farquhar, Britta Forster, Robert T. Furbank, Michael Groszmann, Miguel A. Hernandez-Prieto, Benedict M. Long, Greg Mclean, Andries Potgieter, G. Dean Price, Robert E. Sharwood, Michael Stower, Erik van Oosterom, Susanne von Caemmerer, Spencer M. Whitney, Graeme L. Hammer
Summary: Photosynthetic manipulation provides new opportunities for enhancing crop yield, but the understanding of its impact on crop growth and yield in different environments is limited. This study used simulations to predict the effects of altering photosynthesis on wheat and sorghum yield and uncovered the complex interactions between photosynthesis and crop dynamics.
PLANT CELL AND ENVIRONMENT
(2023)
Article
Biochemistry & Molecular Biology
Sylvester A. Obeng-Darko, Peter R. Brooks, Erik J. Veneklaas, Patrick M. Finnegan
Summary: The nectar quality of Leptospermum polygalifolium flowers undergoes dynamic changes throughout the flower lifespan, with the age of the flowers and the genetic differences between clones affecting the amount of DHA and Tsugar in the nectar. After reaching a peak, the amount of DHA in the accumulated nectar decreases faster than Tsugar, indicating a greater decrease in the exudation of DHA. The ratios of DHA to Tsugar in the accumulated nectar and in the nectar exuded over the next 24 hours decrease with flower age, suggesting simultaneous exudation and reabsorption during flower development.
Article
Forestry
Shes Kanta Bhandari, Erik J. Veneklaas, Lachlan McCaw, Richard Mazanec, Michael Renton
Summary: This study evaluated the effects of thinning on the growth of individual karri trees and stands in even-aged karri forests. The results showed that thinning significantly enhanced the growth of DBH, height, and crown width of individual trees. Thinning also affected the allometric relationship between DBH and height, height-DBH ratio, and crown width. Thinning can be an effective management tool for even-aged karri forests, promoting tree growth and ecological benefits.
SOUTHERN FORESTS-A JOURNAL OF FOREST SCIENCE
(2022)
Article
Agriculture, Multidisciplinary
Sylvester A. Obeng-Darko, Jean Sloan, Rachel M. Binks, Peter R. Brooks, Erik J. Veneklaas, Patrick M. Finnegan
Summary: Manuka honey is known for its strong bioactivity due to the conversion of DHA in floral nectar to the antibacterial compound methylglyoxal during honey maturation. This study found that DHA was present in the floral nectar of two species in the family Myrtaceae, suggesting that DHA accumulation is a shared trait among several genera. This indicates that non-peroxide-based bioactive honey can be sourced from floral nectar outside of the Leptospermum genus.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2023)
Article
Agronomy
Christiana Staudinger, Michael Renton, Matthias Leopold, Jun Wasaki, Erik J. Veneklaas, Patricia de Britto Costa, Gustavo Boitt, Hans Lambers
Summary: In Banksia woodlands in southwestern Australia, the roots of Banksia trees facilitate the uptake of manganese (Mn) by nearby shrubs. The study found that shrubs growing closer to Banksia trees had higher manganese concentrations in their leaves. This finding is important for understanding how plants coexist in nutrient-poor ecosystems.
Article
Multidisciplinary Sciences
Andrew P. Scafaro, Bradley C. Posch, John R. Evans, Graham D. Farquhar, Owen K. Atkin
Summary: Photosynthesis in plants declines at high leaf temperatures, which can be attributed to reduced CO2 conductance, increased loss from photorespiration and respiration, decreased chloroplast electron transport rate (J), and deactivation of Rubisco. However, the factors that best predict this decline are still unclear. This study shows that regardless of species, the decline in photosynthesis can be effectively explained by Rubisco deactivation and declines in J. A model is provided to predict the response of photosynthesis to short-term increases in leaf temperature in the absence of CO2 supply limitations.
NATURE COMMUNICATIONS
(2023)
Article
Forestry
Shes Kanta Bhandari, Erik J. Veneklaas, Lachlan McCaw, Richard Mazanec, Kim Whitford, Michael Renton
Summary: This study aims to develop novel approaches to evaluate the azimuthal effect of competition and apply them to dominant eucalypt species in two mid-latitude Mediterranean climate forests. The study demonstrates the importance of understanding above-vs. below-ground competition in plant communities.
FOREST ECOLOGY AND MANAGEMENT
(2023)
Review
Cell Biology
Martha Ludwig, James Hartwell, Christine A. Raines, Andrew J. Simkin
Summary: The Calvin-Benson-Bassham (CBB) cycle is found in all photosynthetic organisms and acts as the ancestral CO2 assimilation pathway. Biochemical extensions to this cycle, such as C4 photosynthesis and Crassulacean acid metabolism (CAM), allow for CO2 concentrating mechanisms. However, further research is needed to understand the integration and regulation of C4 and CAM pathways with the CBB cycle.
SEMINARS IN CELL & DEVELOPMENTAL BIOLOGY
(2024)