Cu and Zn Stress affect the photosynthetic and antioxidative systems of alfalfa (<i>Medicago sativa</i>)

Chen, Hongzhi; Song, Linlin; Wang, Jiechen; Wang, Yue; Zhang, Huihui

doi:10.1080/17429145.2022.2074157

Cited by 16 publications

(5 citation statements)

References 55 publications

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“…Studies on the inhibition of plant photosynthesis by heavy metals have also been reported [64][65][66]. Whether CK or inoculation treatment was received, Pn generally decreased with the increase in Mo stress, indicating that the Mo toxicity inhibited the ability of maize to assimilate carbon [67].…”

Section: Discussionmentioning

confidence: 99%

AMF Inoculation Alleviates Molybdenum Toxicity to Maize by Protecting Leaf Performance

Zhang

Shi

et al. 2023

JoF

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The use of arbuscular mycorrhizal fungi (AMF) is a vital strategy for enhancing the phytoremediation of heavy metals. However, the role of AMF under molybdenum (Mo) stress is elusive. A pot culture experiment was conducted to explore the effects of AMF (Claroideoglomus etunicatum and Rhizophagus intraradices) inoculation on the uptake and transport of Mo and the physiological growth of maize plants under different levels of Mo addition (0, 100, 1000, and 2000 mg/kg). AMF inoculation significantly increased the biomass of maize plants, and the mycorrhizal dependency reached 222% at the Mo addition level of 1000 mg/kg. Additionally, AMF inoculation could induce different growth allocation strategies in response to Mo stress. Inoculation significantly reduced Mo transport, and the active accumulation of Mo in the roots reached 80% after inoculation at the high Mo concentration of 2000 mg/kg. In addition to enhancing the net photosynthetic and pigment content, inoculation also increased the biomass by enhancing the uptake of nutrients, including P, K, Zn, and Cu, to resist Mo stress. In conclusion, C. etunicatum and R. intraradices were tolerant to the Mo stress and could alleviate the Mo-induced phytotoxicity by regulating the allocation of Mo in plants and improving photosynthetic leaf pigment contents and the uptake of nutrition. Compared with C. etunicatum, R. intraradices showed a stronger tolerance to Mo, which was manifested by a stronger inhibition of Mo transport and a higher uptake of nutrient elements. Accordingly, AMF show potential for the bioremediation of Mo-polluted soil.

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Section: Discussionmentioning

confidence: 99%

AMF Inoculation Alleviates Molybdenum Toxicity to Maize by Protecting Leaf Performance

Zhang

Shi

et al. 2023

JoF

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“…3). The reduction in chlorophyll disrupts the hydrogen transfer reaction chain during photosynthesis (Chen et al, 2022). A decrease in FBA can result in the inhibition of RuBP regeneration (Uematsu et al, 2012), and the change in RuBP content is closely related to the reduction in Rubisco (Schrader et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

Photosynthesis and stress response of coal fly ash on stem elongation in wheat

Wang,

Hu,

et al. 2024

Preprint

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Coal is one of the primary energy sources in China and is widely used for electricity generation. Crops growing in overlapped areas of farmland and coal resources (OAFCR) suffer from coal fly ash stress, especially during stem elongation, which is a key stage that impacts wheat yield and is sensitive to environmental stress. As a primary food crop of China, wheat is essential for food security. However, the characteristics of wheat under the combined stress of fly ash and various heavy metals have not been sufficiently investigated. In this study, we explored the response of stem elongation in wheat to different levels of coal fly ash stress and determined the content of heavy metals (HMs) in wheat leaves. We found that with an increase in fly ash content, the Cu content in the shoots increased, while that in the roots decreased. Coal fly ash exposure reduced the proportions of Pb and Zn in the cytoderm, and the proportion of Cu in the soluble constituents decreased from 58.3–45.7%. Total chlorophyll, chlorophyll a, and chlorophyll b levels decreased significantly, whereas peroxidase (POD) and catalase (CAT) activities generally increased with increasing fly ash dose. Meanwhile, chloroplasts, mitochondria, and their internal structures were damaged, and the cell structures of leaves, such as the internal membrane structure, were damaged.

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“…The lower photosynthetic pigments in this group of plants may be a consequence of rapid initial growth of plants, leading to rapid exhaustion of available nutrients in the wet microalgae with time. Although excessive Cu and Zn concentrations can significantly reduce chlorophyll content in plants [ 98 , 100 – 103 ], this was not observed in plants grown under dry microalgae or sludge, which contained higher concentrations of Cu and Zn. The sludge had four times more Fe than in the dry microalgae in its composition, resulting in a higher content of Fe and chlorophyll in the leaves, highlighting the role of Fe in the chlorophyll biosynthesis.…”

Section: Discussionmentioning

confidence: 99%

Biofertilizers from wastewater treatment as a potential source of mineral nutrients for growth of amaranth plants

Ferreira,

Barrochelo,

de Melo

et al. 2023

PLoS ONE

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Exploring alternative fertilizers is crucial in agriculture due to the cost and environmental impact of inorganic options. This study investigated the potential of sewage-derived biofertilizers on the growth and physiology of Amaranthus cruentus plants. Various treatments were compared, including control treatments with inorganic fertilizer and treatments with biofertilizers composed of microalgae, biosolids and reclaimed water. The following traits were investigated: photosynthetic pigments, gas exchange, growth, and leaf nutrient concentrations. The results showed that the concentrations of N, P, Cu, Fe Zn and Na nutrients, in the dry microalgae and biosolids, were quite high for the needs of the plants. The wet microalgae presented high concentration of Cu, Fe and Zn nutrients while reclaimed water contained high concentration of N, K, Ca and S. Na and Zn nutrients increased in the leaf of plants treated with dry microalgae and biosolid, respectively. At the beginning of the flowering phase, total chlorophyll and carotenoids contents were lower for plants grown with wet microalgae while for plants grown with higher doses of biosolid or reclaimed water total chlorophyll was increased, and carotenoids were not affected. Lower photosynthetic pigments under wet microalgae resulted in lower photosynthetic rates. On the other hand, amendments with dry microalgae and biosolid increased photosynthetic rates with the biosolid being the most effective. Higher applications of biosolid, wet and dry microalgae produced a considerable increase in shoot biomass of amaranth, with the dry microalgae being the most effective. Additionally, reclaimed water obtained after tertiary treatment of sewage with microalgae and biosolids applied alone showed promising effects on plant growth. Overall, these findings suggest that organic fertilizers derived from sewage treatment have the potential to enhance plant growth and contribute to sustainable agricultural practices.

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Cu and Zn Stress affect the photosynthetic and antioxidative systems of alfalfa (Medicago sativa)

Cited by 16 publications

References 55 publications

AMF Inoculation Alleviates Molybdenum Toxicity to Maize by Protecting Leaf Performance

AMF Inoculation Alleviates Molybdenum Toxicity to Maize by Protecting Leaf Performance

Photosynthesis and stress response of coal fly ash on stem elongation in wheat

Biofertilizers from wastewater treatment as a potential source of mineral nutrients for growth of amaranth plants

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