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
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
Hu Sun, Qi Shi, Ning-Yu Liu, Shi-Bao Zhang, Wei Huang
Summary: We found that drought stress delays the initiation of photosynthesis and exacerbates the loss of carbon gain under fluctuating light in tomato seedlings. Additionally, drought stress aggravates the over-reduction of photosystem I and suppresses the photoprotection of photosystem I. However, drought stress also enhances relative cyclic electron flow, which partially compensates for restricted CO2 fixation and promotes the photoprotection of photosystem I.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2023)
Article
Plant Sciences
Benjamin P. O'Connell, Erin Wiley
Summary: As the frequency of heatwaves increases, they are more likely to coincide with other disturbances like insect defoliation. This study found that defoliation exhibited strong thermal acclimation during a simulated spring heatwave, while stomatal conductance and net photosynthesis of oak saplings increased. Heatwave did not affect leaf area recovery or carbohydrate storage of defoliated saplings, but reflush leaves had higher minimum leaf conductance than undefoliated leaves, and this effect was amplified by the heatwave. Higher minimum leaf conductance was associated with higher daytime stomatal conductance and a lower turgor loss point.
PLANT CELL AND ENVIRONMENT
(2023)
Article
Chemistry, Physical
Edith Leal-Sanchez, Jesus Hernandez-Trujillo
Summary: From a dynamical perspective, single molecule junctions consisting of selected 4,4'-biphenyldithiol and 4,4'-dicyanobiphenyl derivatives bonded to gold electrodes were analyzed. The internal rotation of the biphenyl moiety was described using a fully quantum mechanical approach, and potential energy surfaces were obtained through ab initio electronic structure methods. The impact of substituents on the phenyl rings on the potential energy surfaces and the influence of initial conditions on conformational distribution evolution were investigated. Additionally, the conductances at zero bias for different conformational states were calculated.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Plant Sciences
Shuang Li, Abdoul Kader Mounkaila Hamani, Yingying Zhang, Yueping Liang, Yang Gao, Aiwang Duan
Summary: The study revealed a close coordination between leaf anatomical, hydraulic, and economical traits in tomato seedlings under long-term drought, highlighting the importance of leaf anatomy in maintaining the balance between water supply and CO2 diffusion responses to drought.
Article
Biochemistry & Molecular Biology
Margalida Roig-Oliver, Mateu Fullana-Pericas, Josefina Bota, Jaume Flexas
Summary: In the context of current climate change, understanding crops' physiological responses to water shortage is crucial for drought adaptation. Research shows that leaf water relations and cell wall composition play important roles in regulating photosynthesis under water deficit, with implications for plant acclimation to drought stress.
Article
Agronomy
Ben R. Lockwood, Justin T. Maxwell, Sander O. Denham, Scott M. Robeson, David C. LeBlanc, Neil Pederson, Kimberly A. Novick, Tsun Fung Au
Summary: Quercus is undergoing a decrease in abundance and dominance in North American forests. Eastern white oak has experienced a greater decline in dominance compared to northern red oak. Understanding the growth-climate relationships of these species is important for comprehending the changes in Quercus demographics under shifting climatic regimes.
AGRICULTURAL AND FOREST METEOROLOGY
(2023)
Article
Engineering, Civil
Rui Zhu, Tiesong Hu, Quan Zhang, Xiang Zeng, Shan Zhou, Fengyan Wu, Yong Liu, Yanxuan Wang
Summary: Leaf stomata play a crucial role in the exchange of water vapor and carbon dioxide. Optimization models for stomatal regulation have been successful but differ in their mathematical details, indicating the need for further investigation. This study proposed a new stomatal optimization model based on water-carbon balance, and compared it with existing models. The results showed differences in stomatal sensitivity to soil moisture, and the new model captured the response patterns well.
JOURNAL OF HYDROLOGY
(2023)
Article
Agronomy
Sebastian Simondi, Esteban Casaretto, Gaston Quero, Sergio Ceretta, Victoria Bonnecarrere, Omar Borsani
Summary: A mathematical model was developed to evaluate the response of soybean plants to drought under controlled growth conditions. The analysis of water consumption kinetics revealed a genetic association between the parameters t(0.5) and G(w) (t(0.5)) with the genetic structure of the populations.
Article
Agronomy
Lining Song, Jiaojun Zhu, Xiao Zheng, Kai Wang, Jinxin Zhang, Guangyou Hao, Guochen Wang, Jianhua Liu
Summary: Introduced Mongolian pine in the semiarid sandy region of northern China has a higher transpiration rate and greater vulnerability to dieback in extreme drought years compared to native Chinese pine due to its lower ability to control transpiration under drought conditions and larger decrease in hydraulic conductance with increasing soil moisture stress.
AGRICULTURAL AND FOREST METEOROLOGY
(2022)
Article
Agronomy
Quentin Beauclaire, Bernard Heinesch, Bernard Longdoz
Summary: Soil water stress is a major constraint on agrosystem functioning, and this study investigated its effects on GPP limitations of potato crops. The results showed that the limitations originate from non-stomatal causes, emphasizing the need to improve the representation of photosynthesis processes in models for accurate predictions during drought.
AGRICULTURAL AND FOREST METEOROLOGY
(2023)
Article
Forestry
Sander O. Denham, A. Christopher Oishi, Chelcy F. Miniat, Jeffrey D. Wood, Koong Yi, Michael C. Benson, Kimberly A. Novick
Summary: Plants experience hydraulic stress under conditions of low water availability and/or high atmospheric demand for water. Different species adapt to respond to this stress by closing stomata to maintain leaf water potential (isohydric species) or allowing the potential to decline (anisohydric species). Sensitivity of canopy conductance to soil moisture varies among sites and species, while sensitivity to vapor pressure deficit remains relatively constant.
Article
Horticulture
Lidia Aparicio-Duran, Frederick G. Gmitter, Juan M. Arjona-Lopez, Rocio Calero-Velazquez, Aurea Hervalejo, Francisco J. Arenas-Arenas
Summary: This study evaluated the response of three new citrus rootstocks to water stress, with B11R5T60 showing the best performance and ability to adapt to different water stress conditions.
Article
Plant Sciences
Xia Wang, Yanli Fan, Congcong Zhang, Yihong Zhao, Guangyuan Du, Min Li, Bingcheng Si
Summary: This study aimed to identify reliable and easily available drought stress indices for trees and determine the thresholds at which drought activates important physiological responses. It was found that midday xylem water potential (psi(md)) was a better indicator of drought stress than soil water availability (SWA) and predawn xylem water potential (psi(pd)). The study also established five stress levels based on the observed changes in psi(md).
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Plant Sciences
James Bunce
Article
Plant Sciences
James Bunce
Article
Plant Sciences
Jikai Li, Jemaa Essemine, James A. Bunce, Chen Shang, Hailing Zhang, Dequan Sun, Genyun Chen, Mingnan Qu
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
(2019)
Review
Agronomy
L. H. Allen, B. A. Kimball, J. A. Bunce, M. Yoshimoto, Y. Harazono, J. T. Baker, K. J. Boote, J. W. White
AGRICULTURAL AND FOREST METEOROLOGY
(2020)
Article
Plant Sciences
James Bunce
Article
Plant Sciences
Guillaume Tcherkez, Sinda Ben Mariem, Luis Larraya, Jose M. Garcia-Mina, Angel M. Zamarreno, Alberto Paradela, Jing Cui, Franz-Werner Badeck, Diego Meza, Fulvia Rizza, James Bunce, Xue Han, Sabine Tausz-Posch, Luigi Cattivelli, Andreas Fangmeier, Iker Aranjuelo
JOURNAL OF EXPERIMENTAL BOTANY
(2020)
Article
Food Science & Technology
Ping Geng, Jianghao Sun, Pei Chen, Yanfang Li, Bing Peng, James M. Harnly, James Bunce
JOURNAL OF CEREAL SCIENCE
(2020)
Article
Ecology
Kim S. Ely, Alistair Rogers, Deborah A. Agarwal, Elizabeth A. Ainsworth, Loren P. Albert, Ashehad Ali, Jeremiah Anderson, Michael J. Aspinwall, Chandra Bellasio, Carl Bernacchi, Steve Bonnage, Thomas N. Buckley, James Bunce, Angela C. Burnett, Florian A. Busch, Amanda Cavanagh, Lucas A. Cernusak, Robert Crystal-Ornelas, Joan Damerow, Kenneth J. Davidson, Martin G. De Kauwe, Michael C. Dietze, Tomas F. Domingues, Mirindi Eric Dusenge, David S. Ellsworth, John R. Evans, Paul P. G. Gauthier, Bruno O. Gimenez, Elizabeth P. Gordon, Christopher M. Gough, Aud H. Halbritter, David T. Hanson, Mary Heskel, J. Aaron Hogan, Jason R. Hupp, Kolby Jardine, Jens Kattge, Trevor Keenan, Johannes Kromdijk, Dushan P. Kumarathunge, Julien Lamour, Andrew D. B. Leakey, David S. LeBauer, Qianyu Li, Marjorie R. Lundgren, Nate McDowell, Katherine Meacham-Hensold, Belinda E. Medlyn, David J. P. Moore, Robinson Negron-Juarez, Ulo Niinemets, Colin P. Osborne, Alexandria L. Pivovaroff, Hendrik Poorter, Sasha C. Reed, Youngryel Ryu, Alvaro Sanz-Saez, Stephanie C. Schmiege, Shawn P. Serbin, Thomas D. Sharkey, Martijn Slot, Nicholas G. Smith, Balasaheb Sonawane, Paul F. South, Daisy C. Souza, Joseph Ronald Stinziano, Ellen Stuart-Haentjens, Samuel H. Taylor, Mauricio D. Tejera, Johan Uddling, Vigdis Vandvik, Charuleka Varadharajan, Anthony P. Walker, Berkley J. Walker, Jeffrey M. Warren, Danielle A. Way, Brett T. Wolfe, Jin Wu, Stan D. Wullschleger, Chonggang Xu, Zhengbing Yan, Dedi Yang
Summary: Leaf-level gas exchange data are crucial for understanding plant fluxes of carbon and water, but collecting these data can be technically challenging and time-consuming. The lack of metadata and data reporting conventions make it difficult to fully utilize these valuable data. Therefore, a reporting format has been proposed to guide data contributors and users on how to maximize the discoverability and efficient reuse of data.
ECOLOGICAL INFORMATICS
(2021)
Article
Multidisciplinary Sciences
Sinda Ben Mariem, Angie L. Gamez, Luis Larraya, Teresa Fuertes-Mendizabal, Nuria Canameras, Jose L. Araus, Steve P. McGrath, Malcolm J. Hawkesford, Carmen Gonzalez Murua, Myriam Gaudeul, Leopoldo Medina, Alan Paton, Luigi Cattivelli, Andreas Fangmeier, James Bunce, Sabine Tausz-Posch, Andy J. Macdonald, Iker Aranjuelo
SCIENTIFIC REPORTS
(2020)
Article
Plant Sciences
James Bunce
Summary: The response of carbon fixation in C-3 plants to elevated CO2 is larger when constrained by carboxylation capacity (V-C) rather than electron transport (J). Experiments showed that photosynthesis at elevated CO2 is limited by V-C even at low light conditions, with all species tested exhibiting this characteristic.
Editorial Material
Plant Sciences
James Bunce
Article
Plant Sciences
James Bunce
Summary: The effects of CO2 concentration on plants vary among cultivars and environmental conditions. Some cultivars show increased leaf size when exposed to elevated CO2 concentration during darkness, unrelated to leaf water potential or turgor pressure.
Article
Plant Sciences
James Bunce
Summary: Experimental systems simulating future elevated CO2 conditions often have fluctuating CO2, which can reduce photosynthesis by decreasing stomatal conductance and the photochemical efficiency of photosystem II. However, the impact of CO2 fluctuations varies among different species, with some showing no change in photosynthesis and stomatal conductance.
Article
Plant Sciences
James A. Bunce
Summary: The short-term response of plant dark respiration to carbon dioxide concentration [CO2] is controversial, but recent evidence suggests that the rate of dark respiration in plant tissue often decreases with increasing [CO2] in the 200-800 mu mol mol(-1) range. This indicates that plants may have a complex response to changes in atmospheric CO2 concentration, which requires further research.
Article
Plant Sciences
James Bunce