Article
Plant Sciences
Gaochao Cai, Andrea Carminati, Sean M. Gleason, Mathieu Javaux, Mutez Ali Ahmed
Summary: The efficiency-safety tradeoff in plant water transport and stomatal regulation has been studied. Recent research revealed that plants with higher maximum stomatal conductance (g(max)) are more sensitive to stomatal closure during soil drying, resulting in less negative leaf water potential at 50% g(max) (psi(gs50)). This tradeoff can be explained by the effects of soil-plant hydraulics on water movement and plant hydraulic properties, such as conductance and embolism resistance.
PLANT CELL AND ENVIRONMENT
(2023)
Article
Plant Sciences
Maria Karatassiou, Panagiota Karaiskou, Eleni Verykouki, Sophia Rhizopoulou
Summary: This study compared the leaf hydraulic functionality of co-occurring evergreen and deciduous shrubs grown on Olympus Mountain. The results demonstrated different hydraulic tactics between the deciduous and evergreen shrubs, with higher hydraulic conductance and lower stomatal conductance observed in the deciduous plants. Positive correlations were also found between water potential and transpiration in the deciduous shrubs.
Article
Plant Sciences
Jose Carlos Herrera, Tadeja Savi, Joseph Mattocks, Federica De Berardinis, Susanne Scheffknecht, Peter Hietz, Sabine Rosner, Astrid Forneck
Summary: Plant stress experiments are commonly conducted in containers to control environmental conditions, but the container volume can affect plant growth and development. In drought experiments with grapevines, plants in different container sizes showed differences in physiological responses, highlighting the importance of considering container volume in experimental design for unbiased results.
PHYSIOLOGIA PLANTARUM
(2021)
Article
Agronomy
Diriba Bane Nemera, Asher Bar-Tal, Guy J. Levy, Jorge Tarchitzky, Ido Rog, Tamir Klein, Shabtai Cohen
Summary: The performance of avocado orchards growing in clayey soil irrigated with treated wastewater for a long period of time has declined. Mitigation measures such as freshwater or blended irrigation have been found to improve orchard performance, with freshwater being the most effective option.
AGRICULTURAL WATER MANAGEMENT
(2021)
Article
Plant Sciences
Ibrahim Bourbia, Christopher Lucani, Timothy J. Brodribb
Summary: The water potential and shrinkage of leaves are linearly related to transpiration rate in irrigated plants, providing the potential to monitor transpiration using optical methods. By continuously monitoring tissue shrinkage and stem water potential, it is possible to accurately monitor plant transpiration. This technique enables continuous monitoring of plant hydration and transpiration in a variety of plant species.
JOURNAL OF EXPERIMENTAL BOTANY
(2022)
Review
Environmental Sciences
Faqrul Islam Chowdhury, Carles Arteaga, Mohammed Shafiul Alam, Iftakharul Alam, Victor Resco de Dios
Summary: Incomplete stomatal closure during the night leads to significant water losses. Negative effects of vapour pressure deficit, predawn water potential, air temperature, and salinity on stomatal conductance were found, with the circadian clock playing a significant role.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
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
Agronomy
Rui Zhu, Tiesong Hu, Fengyan Wu, Yong Liu, Shan Zhou, Yanxuan Wang
Summary: This study investigates the effects of water deficit and flooding stress on rice's intrinsic water-use efficiency (iWUE) and the relationship between iWUE variations and stress-induced physiological changes. The results show that water deficit and flooding stress decrease rice's photosynthetic and water transport capacities, leading to an increase in iWUE. However, improved iWUE cannot prevent yield reduction. Interestingly, the decrease in photosynthetic capacity is significantly correlated with the decline in water transport capacity. This study has important implications for understanding crop physiological responses to environmental stresses.
AGRICULTURAL WATER MANAGEMENT
(2023)
Article
Environmental Sciences
Matthew Haworth, Giovanni Marino, Alessandro Materassi, Antonio Raschi, Charles P. Scutt, Mauro Centritto
Summary: The limits of stomatal conductance in plants are determined by the size and density of stomata. There is an inverse relationship between stomatal size and density in both fossil and living plants. However, the functional significance of this relationship is still unclear, and it may reflect geometric constraints rather than physiological control. Understanding the tradeoffs involved in stomatal size and density and their interaction with atmospheric CO2 levels is crucial for developing more productive and climate-resilient crops.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Plant Sciences
Qiangqiang Zhang, Wei Tang, Zhuang Xiong, Shaobing Peng, Yong Li
Summary: Stomata in rice panicle are regulated by water and panicle photosynthesis is less sensitive to drought than leaf photosynthesis. Enhancing non-foliar green tissues' photosynthesis is beneficial for increasing crop yield.
JOURNAL OF EXPERIMENTAL BOTANY
(2023)
Article
Plant Sciences
Hend Mandour, Hamid Khazaei, Frederick L. Stoddard, Ian C. Dodd
Summary: This study provides insights into the physiological and genetic control of transpiration in faba bean, and identifies opportunities for marker-assisted selection to improve its performance in water-limited environments.
Article
Geosciences, Multidisciplinary
Yilin Fang, L. Ruby Leung, Ryan Knox, Charlie Koven, Ben Bond-Lamberty
Summary: In plant hydrodynamic models, the numerical accuracy has a significant impact on the simulated vegetation function and dynamics. Coarsening the near-surface vertical grid spacing leads to substantial errors in estimating aboveground biomass, and coarse surface grid resolution should be avoided in specific situations.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2022)
Article
Plant Sciences
Lei Ding, Thomas Milhiet, Boris Parent, Adel Meziane, Francois Tardieu, Francois Chaumont
Summary: research shows that the maize plasma membrane PIP2;5 aquaporin plays a significant role in regulating stomatal closure and plant transpiration. Overexpression of PIP2;5 leads to faster stomatal closure under water deficit conditions, while knocking down PIP2;5 gene expression results in reduced sensitivity of stomatal closure to abscisic acid.
PLANT CELL AND ENVIRONMENT
(2022)
Article
Environmental Sciences
Nan Shan, Yongguang Zhang, Jing M. Chen, Weimin Ju, Mirco Migliavacca, Josep Penuelas, Xi Yang, Zhaoying Zhang, Jacob A. Nelson, Yves Goulas
Summary: This study proposed a semi-mechanistic model for estimating terrestrial transpiration by combining solar-induced chlorophyll fluorescence (SIF) with stomatal conductance (gc) and vapor pressure deficit (VPD), showing improved prediction accuracy and consistency. The model demonstrated that the combination of SIF and VPD can better predict gc and transpiration, with stronger correlations found between gc·VPD0.5 and SIF than other variables. The model's success in estimating transpiration and latent heat flux suggests its potential for improving ecosystem models and enhancing global evapotranspiration estimation.
REMOTE SENSING OF ENVIRONMENT
(2021)
Article
Horticulture
Ruiqin Bai, Yuman Lin, Yiwei Jiang
Summary: Salinity stress can adversely affect plant growth and physiology, as shown in this study on lily hybrids. Different levels of salinity stress resulted in decreased growth, photosynthetic rate, and antioxidant activity in the lily hybrids, with some hybrids exhibiting higher tolerance and maintaining better physiological functions under high salinity conditions.
SCIENTIA HORTICULTURAE
(2021)
Article
Plant Sciences
Jan Muhr, Christian Messier, Sylvain Delagrange, Susan Trumbore, Xiaomei Xu, Henrik Hartmann
Article
Forestry
Susan Trumbore, Claudia I. Czimczik, Carlos A. Sierra, Jan Muhr, Xiaomei Xu
Article
Plant Sciences
Jan Muhr, Susan Trumbore, Niro Higuchi, Norbert Kunert
Article
Environmental Sciences
Valerie F. Schwab, Martin E. Nowak, Clayton D. Elder, Susan E. Trumbore, Xiaomei Xu, Gerd Gleixner, Robert Lehmann, Georg Pohnert, Jan Muhr, Kirsten Kuesel, Kai U. Totsche
WATER RESOURCES RESEARCH
(2019)
Article
Environmental Sciences
Valerie F. Schwab, Martin E. Nowak, Susan E. Trumbore, Xiaomei Xu, Gerd Gleixner, Jan Muhr, Kirsten Kuesel, Kai U. Totsche
WATER RESOURCES RESEARCH
(2019)
Article
Plant Sciences
Ettore D'Andrea, Negar Rezaie, Alberto Battistelli, Olga Gavrichkova, Iris Kuhlmann, Giorgio Matteucci, Stefano Moscatello, Simona Proietti, Andrea Scartazza, Susan Trumbore, Jan Muhr
Article
Plant Sciences
David Herrera-Ramirez, Jan Muhr, Henrik Hartmann, Christine Roemermann, Susan Trumbore, Carlos A. Sierra
Article
Plant Sciences
Ettore D'Andrea, Negar Rezaie, Peter Prislan, Jozica Gricar, Alessio Collalti, Jan Muhr, Giorgio Matteucci
PLANT CELL AND ENVIRONMENT
(2020)
Article
Plant Sciences
David Herrera-Ramirez, Carlos A. Sierra, Christine Roemermann, Jan Muhr, Susan Trumbore, Divino Silverio, Paulo M. Brando, Henrik Hartmann
Summary: Research shows differences in wood non-structural carbon and lipid storage among different tree species, which may explain variations in growth and mortality rates. Trees can be classified into two categories based on their starch storage strategy, and lipid storage is detected in wood parenchyma in some species, related to low mortality rates.
Article
Plant Sciences
Boaz Hilman, Jan Muhr, Juliane Helm, Iris Kuhlmann, Ernst-Detlef Schulze, Susan Trumbore
Summary: Little is known about the sources and age of C respired by tree roots. Previous research identified two functional pools of non-structural carbohydrates (NSC) in stems. Freshly excised roots respired CO2 fixed <1 year previously, while roots from trees girdled similar to 3 months ago respired older C (similar to 1.2 year). The study estimated that over 3 months NSC in girdled roots must be replaced 5-7 times by reserves remobilized from root-external sources.
PLANT CELL AND ENVIRONMENT
(2021)
Article
Forestry
Jonathan Juergensen, Jan Muhr, Alexander Knohl
Summary: This study found that the oxidative ratio of organic material varied temporally and spatially within a single ecosystem, with differences in leaf and twig OR between years and seasons. Leaf OR exhibited the highest temporal variability and sensitivity to climate conditions.
Article
Plant Sciences
David Herrera-Ramirez, Henrik Hartmann, Christine Roemermann, Susan Trumbore, Jan Muhr, Leonardo Maracahipes-Santos, Paulo Brando, Divino Silverio, Jianbei Huang, Iris Kuhlmann, Carlos A. Sierra
Summary: This study aims to explore the seasonal carbon dynamics of mature trees by investigating the influence of starch content and distribution in stemwood. The results show that semi-deciduous/fibre-storing species have greater temporal variation in carbon sink activities and more seasonally dynamic starch content, indicating a possible trade-off between growth and storage. These findings provide insights into the survival and life span of different tree species.
JOURNAL OF ECOLOGY
(2023)
Article
Forestry
Juliane Helm, Henrik Hartmann, Martin Gobel, Boaz Hilman, David Herrera Ramirez, Jan Muhr
Summary: Tree stem CO2 efflux is crucial for ecosystem carbon fluxes, but may not fully represent actual in situ respiration. Simultaneous measurement of O2 flux can provide a closer proxy for respiratory fluxes, although technical challenges in measuring O2 concentration in field applications persist. The new device combining CO2 and O2 sensors shows promising results in providing reproducible measurements of gas exchange fluxes.
Article
Ecology
Boaz Hilman, Jan Muhr, Susan E. Trumbore, Norbert Kunert, Mariah S. Carbone, Paivi Yuval, S. Joseph Wright, Gerardo Moreno, Oscar Perez-Priego, Mirco Migliavacca, Arnaud Carrara, Jose M. Grunzweig, Yagil Osem, Tal Weiner, Alon Angert
Article
Ecology
M. E. Nowak, F. Beulig, J. von Fischer, J. Muhr, K. Kuesel, S. E. Trumbore