Photosynthetic and Physiological Characteristics of the Evergreen Ligustrum japonicum and the Deciduous Cornus officinalis

Sim, Yun Su; Yim, Sung Hwan; Choo, Yeon‐Sik

doi:10.1007/s12374-020-09284-0

Cited by 6 publications

(5 citation statements)

References 49 publications

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“…IONPs were prepared by mixing the aloe vera with iron rust extract by the hydrothermal method at (300 and 600) o C, as shown in figures 5 (A-B). The high peaks of the crystalline Fe 3 O 4 phase at (110) and ( 311) are indicated by ( 110), ( 012), ( 111), ( 220), ( 311), (422), and (511) of the miller (structure) indexes, as indicated by figure 5 (A) (Ramegowda & Senthil-Kumar, 2015;Sim et al, 2020). While the high peaks of the crystalline phase Fe 902 O are (006), ( 110), (012), and (111), miller indices with the face center cubic, as illustrated in figure 5 (B) (Maham et al, 2017;Popescu et al, 2020), the peaks of the crystalline phase Fe 902 O are ( 006) and (111).…”

Section: Xrd Analysis Of (Fe3o4 and Fe902o) Produced From Mixing The ...mentioning

confidence: 99%

Study the degradation and photocatalytic activity of the methylene blue dye by mixing the Aloe vera extract with rust iron oxide nanoparticle

Kadhim,

Abid,

Salih

2023

NRFHH

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Iron oxide nanoparticles (IONPs) have been widely used in environmental applications due to their low cost, safety, and effectiveness. This research successfully produced IONPs by hydrothermally reacting iron rust and Aloe vera gel plant extract at 100 oC for 18 hours in an autoclave cell. IONPs were produced to prevent detrimental effects on human health by degrading methylene blue dye (MB). IONPs were characterized by XRD, FE-SEM, and FT-IR spectroscopy. The small crystalline size (19 nm), and (inverse cubic) structure (magnetite) of (Fe3O4 NPs) 600 oC were explained by measurements of XRD, whereas small crystalline (Fe902O) NPs of 300 oC were of 28 nm. FESEM revealed that the particle size of (Fe3O4) NPs at 600 oC using an aloe vera extract was (26.80 to 37.96) nm, whereas Fe902O (wustite) at 300 oC was tiny and crystalline at (31.63 to 130.3) nm. The strong absorption band for Fe3O4 NPs (magnetites) at 600 °C with aloe vera is explained by the FT-IR spectra. The absorption peak was high at (650) cm-1 and corresponded to the Fe-O series of Fe902O NPs at 300 oC. When the spectra showed the absorption peak, it was strong. Iron oxide NPs have been used for a short time in environmental treatment to remove MB dye. For 40 minutes of IONPs (Fe3O4), the results of degradation effectiveness (95%) were 300 oC for MB dye, but degradation efficiency (91%) was 75 minutes of IONPs (Fe902O) with aloe vera at 600 oC for MB dye.

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Section: Xrd Analysis Of (Fe3o4 and Fe902o) Produced From Mixing The ...mentioning

confidence: 99%

Study the degradation and photocatalytic activity of the methylene blue dye by mixing the Aloe vera extract with rust iron oxide nanoparticle

Kadhim,

Abid,

Salih

2023

NRFHH

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“…Previous studies have shown that black locust was relatively sensitive to temporary soil moisture changes by rainfall [ 33 ]. The fluctuation of soil water content caused by rainfall could significantly affect plant photosynthesis [ 44 , 45 ]. Our study also found that gas exchange parameters in the treated plot were significantly improved after rainfall (period II), and photosynthetic parameters were not significantly different between plots.…”

Section: Discussionmentioning

confidence: 99%

Effects of Rainfall Exclusion Treatment on Photosynthetic Characteristics of Black Locust in the Sub-Humid Region of the Loess Plateau, China

Guo,

Wang,

et al. 2024

Plants

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The mesic-origin species Robinia pseudoacacia L. (black locust) is widely planted in the semiarid and sub-humid areas of the Loess Plateau for the reforestation of vegetation-degraded land. Under the scenario of changing precipitation patterns, exploring the response of photosynthesis to drought allows us to assess the risk to sustainable development of these plantations. In this study, paired plots were established including the control and a treatment of 30% exclusion of throughfall (since 2018). The photosynthetic characteristics were investigated using a portable photosynthesis system for four periods in the full-leaf growing season of 2021–2022, the fourth and fifth years, on both treated and controlled sampling trees. Leaf gas exchange parameters derived from diurnal changing patterns, light response curves, and CO2 response curves showed significant differences except for period II (9–11 September 2021) between the two plots. The photosynthetic midday depression was observed in 2022 in the treated plot. Meanwhile, the decline of net photosynthetic rate in the treated plot was converted from stomatal limitation to non-stomatal limitation. Furthermore, we observed that black locust adapted to long-term water deficiency by reducing stomatal conductance, increasing water use efficiency and intrinsic water use efficiency. The results demonstrate that reduction in precipitation would cause photosynthesis decrease, weaken the response sensitivity to light and CO2, and potentially impair photosynthetic resilience of the plantations. They also provide insights into the changes in photosynthetic functions under global climate change and a reference for management of plantations.

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“…8). The results imply that most of the absorbed light energy is not used as effective photochemical energy and the ratio of energy lost passively in the form of fluorescence in the reaction center of PSII increases (Sim et al 2021).…”

Section: Diurnal Variations In Chlorophyll Fluorescencementioning

confidence: 95%

“…Water is essential for photosynthesis, but transpiration, which cause water loss in plants, occurs during CO 2 absorption through the stomata (Pallardy 2010). The Moisture content of leaves is regulated by the opening and closing of stomata, and stomata are known to regulate the rate of transpiration and photosynthesis of plants through gas and water exchange (Sim et al 2021). In addition, stomatal conductance is a key factor that influences the resistance to diffusion of water, which affects transpiration in leaves.…”

Section: Photosynthesis Indicatorsmentioning

confidence: 99%

Photosynthetic characteristics and chlorophyll of Vitex rotundifolia in coastal sand dune

Kim,

Yim,

Sim

et al. 2023

J Ecol Environ

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Background: This study analyzed the physiological adaptations of a woody plant, Vitex rotundifolia, in Goraebul coastal sand dunes from May to September 2022. Environmental factors and physiological of plants growing under field and controlled (pot) conditions were compared. Results: Photosynthesis in plants growing in the coastal sand dunes and pots was the highest in June 2022 and July 2022, respectively. Chlorophyll fluorescence indicated the presence of stress in the coastal sand dune environment. The net photosynthesis rate (P N ) and Y(II) were highest in June in the coastal sand dune environment and July in the pot environment. In August and September, Y(NPQ) increased in the plants in the coastal sand dune environment, showing their photoprotective mechanism. Chlorophyll a and b contents in the pot plant leaves were higher than those in the coastal sand dune plant leaves; however, chlorophyll-a/b ratio was higher in the coastal sand dune plant leaves than in the pot plant leaves, suggesting a relatively high photosynthetic efficiency. Carotenoid content in the coastal sand dune plant leaves was higher in August and September 2022 than that in the pot plant leaves. Leaf water and soluble carbohydrate contents of the coastal sand dune plant leaves decreased in September 2022, leading to rapid leaf abscission. Diurnal variations in photosynthesis and chlorophyll fluorescence in both environments showed peak activity at 12:00 hour; however, the coastal sand dune plants had lower growth rates and Y(II) than the pot plants. Plants in the coastal sand dunes had higher leaf water and ion contents, indicating that they adapted to water stress through osmotic adjustments. However, plants growing in the coastal sand dunes exhibited reduced photosynthetic activity and accelerated decline due to seasonal temperature decreases. These findings demonstrate the adaptation mechanisms of V. rotundifolia to water stress, poor soils, and high temperature conditions in coastal sand dunes. Conclusions:The observed variations indicate the responses of the V. rotundifolia to environmental stress, and may reveal its survival strategies and adaptation mechanisms to stress. The results provide insights into the ecophysiological characteristics of V. rotundifolia and a basis for the conservation and restoration of damaged coastal sand dunes.

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Photosynthetic and Physiological Characteristics of the Evergreen Ligustrum japonicum and the Deciduous Cornus officinalis

Cited by 6 publications

References 49 publications

Study the degradation and photocatalytic activity of the methylene blue dye by mixing the Aloe vera extract with rust iron oxide nanoparticle

Study the degradation and photocatalytic activity of the methylene blue dye by mixing the Aloe vera extract with rust iron oxide nanoparticle

Effects of Rainfall Exclusion Treatment on Photosynthetic Characteristics of Black Locust in the Sub-Humid Region of the Loess Plateau, China

Photosynthetic characteristics and chlorophyll of Vitex rotundifolia in coastal sand dune

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