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
Plant Sciences
Onofrio Davide Palmitessa, Aina E. Prinzenberg, Elias Kaiser, Ep Heuvelink
Summary: Using LED instead of HPS lamps in greenhouses for growing young tomato plants can lead to higher photosynthetic capacity, stomatal density, and transpiration rate, potentially due to the different light spectrum provided by LED. Thermal imaging can be used to assess plant transpiration status, with plants grown under LED generally showing increased photosynthetic gas exchange levels. The differences between LED and HPS were less pronounced in experiments where the fraction of lamp light over natural light was smaller.
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
Agronomy
Anowarul Bokshi, Rebecca J. Thistlethwaite, Edward D. Chaplin, Erasmus Kirii, Richard M. Trethowan, Daniel K. Y. Tan
Summary: High temperatures and increasing CO2 concentrations pose a major threat to global wheat production. This research evaluated Australian wheat cultivars for heat tolerance and identified physiological traits associated with adaptation to high temperatures. The findings provide valuable candidates for breeding and selecting wheat cultivars that can better adapt to changing climate conditions.
JOURNAL OF AGRONOMY AND CROP SCIENCE
(2022)
Article
Agronomy
Thuy Huu Nguyen, Matthias Langensiepen, Thomas Gaiser, Heidi Webber, Hella Ahrends, Hubert Hueging, Frank Ewert
Summary: Drought has a significant impact on crop growth, and understanding the short-term and long-term responses of crops to drought is crucial. Field data analysis showed that different water supply treatments strongly influenced leaf and canopy gas exchange, as well as cumulative growth in winter wheat and maize. The long-term morphological responses of winter wheat played a larger role in regulating transpiration and assimilation rates, while maize exhibited physiological advantages and morphological adjustments under drought conditions. Improved modeling of gas exchange and crop growth should consider dynamic changes in leaf area and stomatal regulation.
AGRICULTURAL AND FOREST METEOROLOGY
(2022)
Article
Plant Sciences
David Israel, Shanjida Khan, Charles R. Warren, Janusz J. Zwiazek, T. Matthew Robson
Summary: The roles of different plasma membrane aquaporins in leaf-level gas exchange of Arabidopsis thaliana are influenced by the growth environment, with PIPs contributing more to g(s) under low humidity conditions, and AtPIP2;5 possibly playing a role in regulating CO2 membrane permeability.
JOURNAL OF EXPERIMENTAL BOTANY
(2021)
Article
Horticulture
Hesham A. Ahmed, Yuxin Tong, Lie Li, Suliaman Q. Sahari, Abdulkarem M. Almogahed, Ruifeng Cheng
Summary: This study investigates the effects of CO2 concentration, illumination intensity, and air speed on the growth, gas exchange, and light use efficiency of lettuce plants grown under artificial lighting. The results show that CO2 concentration and illumination intensity have a strong influence on lettuce growth and gas exchange, while air speed enhances CO2 transport during photosynthesis. The findings provide valuable insights for indoor cultivation systems using artificial lighting to grow lettuce.
Article
Horticulture
Haijun Liu, Mengxuan Shao, Li Yang
Summary: With the increasing demand for vegetable fruits, tomato crops are now increasingly planted in solar greenhouses in North China. This study evaluated the photosynthetic characteristics of tomato plants and its responses to the inside microclimate in a sunken solar greenhouse. Results showed that both plant transpiration and photosynthesis rates were positively related to inside radiation and vapor pressure deficit. The water use efficiency at the leaf level was higher under specific environmental conditions. These findings could help enhance the growth of tomato crops in winter by using this sunken solar greenhouse.
Article
Forestry
Songmei Shi, Xiao Xu, Xingshui Dong, Chenyang Xu, Yuling Qiu, Xinhua He
Summary: This study investigated the effects of anticipated future elevated CO2 on growth, physiology, and nutrient uptake in two widely cultivated mulberry varieties in southwest China. The results showed that elevated CO2 significantly increased plant growth but decreased chlorophyll concentrations and photosynthetic rates, while also leading to lower leaf N and P concentrations. Nutrient dilution and changes in plant demand were identified as key factors driving the reduction of leaf N and P under elevated CO2 conditions.
Article
Green & Sustainable Science & Technology
Jun Mao, Yu Luo, Chuan Jin, Minze Xu, Xinhao Li, Yun Tian
Summary: This study investigated the environmental regulatory mechanism of leaf photosynthesis and transpiration in the desert shrub Artemisia ordosica. The results showed that stomatal conductance (g(s)) positively correlated with both photosynthetic rate (P-n) and transpiration rate (E). P-n and E exhibited different correlations with g(s) in different months. Air temperature and light were found to mainly affect the maximum photosynthetic rate (Pn-max) and carboxylation rates. This study provides insights into the responses of desert shrub ecosystems to climate change.
Article
Plant Sciences
Gen Sakurai, Stanley J. Miklavcic
Summary: In this study, we used a detailed whole leaf hydraulic model to investigate the local operation of three stomatal conductance models distributed on a whole leaf scale. By examining the leaf-area distributions of photosynthesis, transpiration, stomatal conductance, and guard cell turgor pressure, we quantified the behavior of these models and their responses to changes in environmental conditions. Our findings reveal that a stomatal conductance model which includes mechanical processes dependent on local variables predicts a spatial variation of physiological activity across the leaf, indicating that the leaf functions of photosynthesis and transpiration are not uniformly operative even under uniform external conditions. Our simulation experiments comparing two versions of a mechanical stomatal conductance model suggest that leaves exhibit a more complex spatial distribution pattern of both photosynthesis and transpiration rate and more complex dependencies on environmental conditions when a non-linear relationship between the stomatal aperture and guard cell and epidermal cell turgor pressures is implemented.
FRONTIERS IN PLANT SCIENCE
(2022)
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
Agronomy
Wei Xue, Hong Luo, Marc Carriqui, Miquel Nadal, Jian-feng Huang, Jiao-lin Zhang
Summary: This study investigates the quantification of mesophyll conductance (gm) in the photosynthesis model and its impact on plant gas exchange estimations. It introduces a peaked Arrhenius function to depict the temperature response of gm and evaluates four different gm estimation methods in 19 C3 species. The results show that explicitly considering gm in the model can improve the modeling accuracy, and not considering the suboptimal stage of gm temperature response can lead to significant overestimations in photosynthesis. The explicit expression of gm has equally important effects on photosynthesis and transpiration estimations.
AGRICULTURAL AND FOREST METEOROLOGY
(2022)
Article
Biochemistry & Molecular Biology
Jeongeui Hong, Kyoung Rok Geem, Jaewook Kim, Ick-Hyun Jo, Tae-Jin Yang, Donghwan Shim, Hojin Ryu
Summary: High temperature leads to reduced shoot and root growth in Panax ginseng, which is attributed to decreased cell elongation and cambium stem cell activity. RNA-seq data analysis reveals that the repression of stem and root growth is closely related to changes in photosynthesis, cell wall organization, cell wall loosening, and plant hormone signaling.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
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)