Article
Plant Sciences
Ved Parkash, John L. Snider, Henry Y. Sintim, Lavesta C. Hand, Gurpreet Virk, Amrit Pokhrel
Summary: Nitrogen deficiency limits the net carbon assimilation rate in field-grown cotton. The sensitivity of individual physiological processes driving nitrogen deficiency-induced declines in assimilation was examined in this study. The results showed that Rubisco carboxylation, RuBP regeneration, and gross photosynthesis were the most sensitive processes to nitrogen deficiency.
JOURNAL OF EXPERIMENTAL BOTANY
(2023)
Article
Plant Sciences
Cyril Abadie, Julie Lalande, Anis M. Limami, Guillaume Tcherkez
Summary: Manipulating the mole fractions of CO2 and O-2 during gas exchange experiments has a broad impact on metabolism beyond just carboxylation and oxygenation pathways. Non-targeted metabolic analyses have shown changes in tricarboxylic acid cycle, anaplerosis, and nitrogen or sulphur assimilation pathways as a result. This approach has also revealed significant alterations in branched chain amino acids, phenylpropanoid metabolism, and adenosine turnover, all of which involve CO2 assimilation or liberation and affect net CO2 exchange.
PLANT CELL AND ENVIRONMENT
(2021)
Article
Plant Sciences
Kazuma Sakoda, Wataru Yamori, Michael Groszmann, John R. Evans
Summary: In fluctuating light conditions, both stomatal conductance and Vcmax/J play a significant role in limiting photosynthesis during induction, suggesting that these factors are crucial for understanding the dynamics of leaf photosynthesis.
Article
Plant Sciences
Peter Petrik, Anja Petek-Petrik, Mohammad Mukarram, Bernhard Schuldt, Laurent J. Lamarque
Summary: The increasing evaporative demand due to climate change will significantly affect the balance of carbon assimilation and water losses of plants worldwide. The development of crop varieties with improved water-use efficiency (WUE) will be critical for adapting agricultural strategies under predicted future climates. This review aims to summarize the most important leaf morpho-physiological constraints of WUE in C-3 plants and identify gaps in knowledge.
Article
Forestry
Dina A. A. Ronzhina, Svetlana V. V. Migalina, Irek A. A. Yusupov
Summary: In petroleum-producing territories of West Siberia (Russia), the thermal effect of oilwell gas flares on nearby plant communities was studied. The research focused on the effect of the hydrothermal regime at the flare sites on mesophyll and stomatal functional traits of Betula pubescens. The study found that plants near the gas flares had smaller stomata and lower stomatal density, resulting in lower maximum stomatal conductance.
JOURNAL OF FORESTRY RESEARCH
(2023)
Article
Plant Sciences
Wenshi Hu, Zhifeng Lu, Hehe Gu, Xiaolei Ye, Xiaokun Li, Rihuan Cong, Tao Ren, Jianwei Lu
Summary: Leaf growth depends on photosynthesis and hydraulics for carbohydrates and expansion power. Under potassium deficiency, leaf area, photosynthesis, and hydraulics are affected by changes in leaf structure. This study observed the leaf hydraulic conductance and photosynthetic rate of Brassica napus during leaf growth under different levels of potassium supply. The results showed that potassium deficiency decreased leaf hydraulic conductance and photosynthetic rate. It also led to an increase in mesophyll cell investment and a decrease in the volume fraction of intercellular air-space, resulting in reduced leaf expansion rate.
PLANT CELL AND ENVIRONMENT
(2022)
Article
Plant Sciences
Lei Wang, Qing-Lai Dang
Summary: The study revealed significant differences in leaf morphology and growth characteristics between shoots originated from different types of buds, with axillary buds producing shorter leaves with higher specific leaf area, and adventitious buds producing longer leaves with a lanceolate shape. Shoots from different types of buds also exhibited different growth rates and biomass, with variations in direction depending on the population of the mother tree.
PHYSIOLOGIA PLANTARUM
(2022)
Article
Forestry
Yasutomo Hoshika, Lorenzo Cotrozzi, Olga Gavrichkova, Cristina Nali, Elisa Pellegrini, Andrea Scartazza, Elena Paoletti
Summary: The functional responses of two Mediterranean pine species, P. halepensis and P. pinea, to long-term ozone exposure were examined. It was found that P. halepensis, with thin needles, was sensitive to ozone and showed a significant decrease in photosynthesis, while P. pinea, with thicker needles, was resistant to ozone and did not show clear effects on photosynthesis. These findings are important for understanding the response mechanisms and adaptability of Mediterranean pine forests to ozone pollution.
Article
Plant Sciences
Fulton E. Rockwell, N. Michele Holbrook, Piyush Jain, Annika E. Huber, Sabyasachi Sen, Abraham D. Stroock
Summary: Recent reports question the assumption of leaf gas exchange analysis that leaf air spaces are effectively saturated with water vapor. Spatial heterogeneities may contribute to the appearance of undersaturation in internal leaf air spaces. Further refinement of experimental approaches is needed to distinguish undersaturation from the effects of spatial variations in fluxes or conductances.
Article
Plant Sciences
Faliang Zeng, Lin Zhu, Guojiao Wang, Yinpei Liang, Dianrong Ma, Jiayu Wang
Summary: Leaf anatomy plays a crucial role in determining photosynthesis performance. In this study, two rice recombinant inbred lines, H138 and H217, showed higher net CO2 assimilation compared to their parent Sasanishiki, mainly due to improved leaf anatomy. The improvement in leaf anatomy was associated with increased mesophyll cell number and area, higher chlorophyll content, and increased expression of genes involved in light-harvesting. Furthermore, higher stomatal and mesophyll conductance in H138 and H217 contributed to improved leaf photosynthesis.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Plant Sciences
Hu Sun, Xiao-Qian Wang, Zhi-Lan Zeng, Ying-Jie Yang, Wei Huang
Summary: The effects of exogenous melatonin on photosynthetic performances have not been well clarified. This study found that exogenous melatonin delays the induction process of photosynthesis, aggravates carbon loss, and enhances the water-water cycle for photoprotection.
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
Multidisciplinary Sciences
Ming-Ju Amy Lyu, Udo Gowik, Steve Kelly, Sarah Covshoff, Julian M. Hibberd, Rowan F. Sage, Martha Ludwig, Gane Ka-Shu Wong, Peter Westhoff, Xin-Guang Zhu
Summary: The study on the evolutionary trajectory of C-4 photosynthesis in the Flaveria genus revealed consistent modification patterns in gene expression, protein sequence, and morphological features, with the greatest modifications occurring between C-3-C-4 and C-4-like species. The results support major evolutionary events during the evolution of C-4 metabolism.
SCIENTIFIC REPORTS
(2021)
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)
Review
Plant Sciences
Xinyou Yin, Florian A. Busch, Paul C. Struik, Thomas D. Sharkey
Summary: On the occasion of the 40th anniversary of the publication of the landmark model by Farquhar, von Caemmerer & Berry on steady-state C-3 photosynthesis (known as the FvCB model), we review three major further developments of the model, discussing their importance in the field of photosynthesis. Based on new insights, caveats in applying the FvCB model are presented and further research needs are highlighted.
PLANT CELL AND ENVIRONMENT
(2021)
