Differences in susceptibility to photoinhibition do not determinegrowth rate under moderate light in batch or turbidostat - a studywith five green algae

Mattila, Heta; Valev, Dimitar; Mishra, Kumud Bandhu; Havurinne, Vesa; Virtanen, Olli; Antinluoma, Mikko; Tyystjärvi, Esa

doi:10.32615/ps.2021.054

Cited by 5 publications

(3 citation statements)

References 31 publications

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“…We concluded that the less the inoculating cell concentration was, the higher the growth rate was. This observation can explain the anomaly of growth rates measured in turbidostats [37].…”

Section: The Generation Time Is Dependent On Cell Concentrationmentioning

confidence: 52%

Reconsidering Dogmas about the Growth of Bacterial Populations

Ughy,

Nagyapati,

Lajko

et al. 2023

Cells

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The growth of bacterial populations has been described as a dynamic process of continuous reproduction and cell death. However, this is far from the reality. In a well fed, growing bacterial population, the stationary phase inevitably occurs, and it is not due to accumulated toxins or cell death. A population spends the most time in the stationary phase, where the phenotype of the cells alters from the proliferating ones, and only the colony forming unit (CFU) decreases after a while, not the total cell concentration. A bacterial population can be considered as a virtual tissue as a result of a specific differentiation process, in which the exponential-phase cells develop to stationary-phase cells and eventually reach the unculturable form. The richness of the nutrient had no effect on growth rate or on stationary cell density. The generation time seems not to be a constant value, but it depended on the concentration of the starter cultures. Inoculations with serial dilutions of stationary populations reveal a so-called minimal stationary cell concentration (MSCC) point, up to which the cell concentrations remain constant upon dilutions; that seems to be universal among unicellular organisms.

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“…We concluded that the less the inoculating cell concentration was, the higher the growth rate was. This observation can explain the anomaly of growth rates measured in turbidostats [37].…”

Section: The Generation Time Is Dependent On Cell Concentrationmentioning

confidence: 52%

Reconsidering Dogmas about the Growth of Bacterial Populations

Ughy,

Nagyapati,

Lajko

et al. 2023

Cells

View full text Add to dashboard Cite

show abstract

“…The F v /F m ratio, which makes it possible to verify whether there was damage to the photosynthetic apparatus, is a variable that represents the maximum photochemical efficiency of PSII in a condition in which all reaction centers are open and receive a pulse of light saturating. Under stress conditions, such as the reduction of N availability in the plant, there may be a decline in the values of this trait, which indicates possible damage to the photochemical machinery [46,47]. Therefore, genotypes that present tolerance mechanisms to protect the PSII may show insignificant reductions or even higher values for this measure, even in stressful situations [48][49][50].…”

Section: The Effect Of Nitrogen Deprivation On Photosynthesis Maximum...mentioning

confidence: 99%

Exploring the Potential of Heterosis to Improve Nitrogen Use Efficiency in Popcorn Plants

Santos

Júnior

Bispo

et al. 2023

Plants

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Nitrogen is crucial for plant growth and development, and improving nitrogen use efficiency (NUE) is a viable strategy for reducing dependence on nitrogen inputs and promoting sustainability. While the benefits of heterosis in corn are well known, the physiological mechanisms underlying this phenomenon in popcorn are less understood. We aimed to investigate the effects of heterosis on growth and physiological traits in four popcorn lines and their hybrids under two contrasting nitrogen conditions. We evaluated morpho-agronomic and physiological traits such as leaf pigments, the maximum photochemical efficiency of PSII, and leaf gas exchange. Components associated with NUE were also evaluated. N deprivation caused reductions of up to 65% in terms of plant architecture, 37% in terms of leaf pigments, and 42% in terms of photosynthesis-related traits. Heterosis had significant effects on growth traits, NUE, and foliar pigments, particularly under low soil nitrogen conditions. N-utilization efficiency was found to be the mechanism favoring superior hybrid performance for NUE. Non-additive genetic effects were predominant in controlling the studied traits, indicating that exploring heterosis is the most effective strategy for obtaining superior hybrids to promote NUE. The findings are relevant and beneficial for agro farmers seeking sustainable agricultural practices and improved crop productivity through the optimization of nitrogen utilization.

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“…the rate-limiting steps during the dark-to-light transition of PSII and its dependence on the lipid environment in isolated PSII core complexes from the cyanobacterium Thermosynechococcus vulcanus. The research paper by Mattila et al (2022), submitted by Esa Tyystjärvi, deals with studies on the general question of the growth limitation and the susceptibility to photoinhibition, under batch and turbidostat growth modes in several algae. The paper by Yuan et al (2022), submitted by Ya (David) Guo presents the concept of a flexible, computercontrolled plant growth chamber with a feedback mechanism that can utilize photosynthesis models in practical agriculture.…”

mentioning

confidence: 99%