Plant Photosynthesis in Complex Climates

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Physiology and Metabolism".

Deadline for manuscript submissions: 30 June 2024 | Viewed by 1333

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Guest Editor
College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
Interests: crop photosynthetic function regulation; foliar photosynthetic protectants under plant adversity conditions; high photosynthetic efficiency varieties of crops
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Special Issue Information

Dear Colleagues,

Climate change uncertainty has prompted higher photosynthetic efficiency and yields that will ensure food security in the coming decades, and genetic manipulation and the reduction of carbon or energy losses could be beneficial for increasing photosynthetic efficiency or crop yield. In complex climates, there is an urgent need to improve key photosynthetic limiting factors such as light use efficiency, stomatal/mesophyll conductance, photorespiration losses, and Rubisco activity, as well as rates of photosynthetic electron transport, nonphotochemical quenching, and carbon metabolism or fixation pathways. In addition, the mechanistic basis for enhancements in photosynthetic adaptation to environmental variables, such as light intensity, temperature, elevated CO2 levels, and others, needs further investigation. As such, this Special Issue of Plants will focus on the physiological bases and strategies to improve plant photosynthesis by targeting these intrinsic photosynthetic limitations as well as external environmental factors.

Dr. Xiaoming Xu
Guest Editor

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Keywords

  • complex climates
  • electron transport
  • CO2 assimilation
  • higher photosynthetic efficiency
  • genetic regulation for photosynthetic traits
  • strategies to improve plant photosynthesis

Published Papers (2 papers)

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Research

21 pages, 3643 KiB  
Article
Nitric Oxide Mitigates the Deleterious Effects Caused by Infection of Pseudomonas syringae pv. syringae and Modulates the Carbon Assimilation Process in Sweet Cherry under Water Stress
by Carlos Rubilar-Hernández, Carolina Álvarez-Maldini, Lorena Pizarro, Franco Figueroa, Luis Villalobos-González, Paula Pimentel, Nicola Fiore and Manuel Pinto
Plants 2024, 13(10), 1361; https://0-doi-org.brum.beds.ac.uk/10.3390/plants13101361 - 14 May 2024
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Abstract
Bacterial canker is an important disease of sweet cherry plants mainly caused by Pseudomonas syringae pv. syringae (Pss). Water deficit profoundly impairs the yield of this crop. Nitric oxide (NO) is a molecule that plays an important role in the plant defense mechanisms. [...] Read more.
Bacterial canker is an important disease of sweet cherry plants mainly caused by Pseudomonas syringae pv. syringae (Pss). Water deficit profoundly impairs the yield of this crop. Nitric oxide (NO) is a molecule that plays an important role in the plant defense mechanisms. To evaluate the protection exerted by NO against Pss infection under normal or water-restricted conditions, sodium nitroprusside (SNP), a NO donor, was applied to sweet cherry plants cv. Lapins, before they were exposed to Pss infection under normal or water-restricted conditions throughout two seasons. Well-watered plants treated with exogenous NO presented a lower susceptibility to Pss. A lower susceptibility to Pss was also induced in plants by water stress and this effect was increased when water stress was accompanied by exogenous NO. The lower susceptibility to Pss induced either by exogenous NO or water stress was accompanied by a decrease in the internal bacterial population. In well-watered plants, exogenous NO increased the stomatal conductance and the net CO2 assimilation. In water-stressed plants, NO induced an increase in the leaf membranes stability and proline content, but not an increase in the CO2 assimilation or the stomatal conductance. Full article
(This article belongs to the Special Issue Plant Photosynthesis in Complex Climates)
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17 pages, 2641 KiB  
Article
Impact of Sodium Nitroprusside on the Photosynthetic Performance of Maize and Sorghum
by Georgi D. Rashkov, Martin A. Stefanov, Ekaterina K. Yotsova, Preslava B. Borisova, Anelia G. Dobrikova and Emilia L. Apostolova
Plants 2024, 13(1), 118; https://0-doi-org.brum.beds.ac.uk/10.3390/plants13010118 - 31 Dec 2023
Cited by 1 | Viewed by 867
Abstract
Nitric oxide (NO) is an important molecule in regulating plant growth, development and photosynthetic performance. This study investigates the impact of varying concentrations (0–300 µM) of sodium nitroprusside (SNP, a donor of NO) on the functions of the photosynthetic apparatus in sorghum ( [...] Read more.
Nitric oxide (NO) is an important molecule in regulating plant growth, development and photosynthetic performance. This study investigates the impact of varying concentrations (0–300 µM) of sodium nitroprusside (SNP, a donor of NO) on the functions of the photosynthetic apparatus in sorghum (Sorghum bicolor L. Albanus) and maize (Zea mays L. Kerala) under physiological conditions. Analysis of the chlorophyll fluorescence signals (using PAM and the JIP-test) revealed an increased amount of open PSII reaction centers (qP increased), but it did not affect the number of active reaction centers per PSII antenna chlorophyll (RC/ABS). In addition, the smaller SNP concentrations (up to 150 μM) alleviated the interaction of QA with plastoquine in maize, while at 300 μM it predominates the electron recombination on QAQB, with the oxidized S2 (or S3) states of oxygen evolving in complex ways in both studied plant species. At the same time, SNP application stimulated the electron flux-reducing end electron acceptors at the PSI acceptor side per reaction center (REo/RC increased up to 26%) and the probability of their reduction (φRo increased up to 20%). An increase in MDA (by about 30%) and H2O2 contents was registered only at the highest SNP concentration (300 µM). At this concentration, SNP differentially affected the amount of P700+ in studied plant species, i.e., it increased (by 10%) in maize but decreased (by 16%) in sorghum. The effects of SNP on the functions of the photosynthetic apparatus were accompanied by an increase in carotenoid content in both studied plants. Additionally, data revealed that SNP-induced changes in the photosynthetic apparatus differed between maize and sorghum, suggesting species specificity for SNP’s impact on plants. Full article
(This article belongs to the Special Issue Plant Photosynthesis in Complex Climates)
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