Exogenous melatonin enhances Cd stress tolerance in Platycladus orientalis seedlings by improving mineral nutrient uptake and oxidative stress

Chun, Ou; Cheng, Wenhui; Wang, Zelu; Yao, Xiamei; Yang, Shuai

doi:10.1016/j.ecoenv.2023.114619

Cited by 19 publications

(16 citation statements)

References 61 publications

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“…Photosynthesis, the most important physiological process of plants, is highly sensitive to abiotic stress, such as TE toxicity [69]. Toxic elements interfere with plant photosynthesis by disrupting chloroplast ultrastructure, inhibiting light energy uptake, disrupting the electron transport chain and reducing the activity of enzymes associated with the Calvin cycle [23,28,29,70]. Our results demonstrated that TEs in soil have a significant impact on the gas-exchange parameters (GAPs) of carrots (Table 2).…”

Section: Response Of Gas-exchange Parameters and Photosynthetic Pigme...mentioning

confidence: 71%

Response of Carrot (Daucus carota L.) to Multi-Contaminated Soil from Historic Mining and Smelting Activities

Novák,

Zemanová,

Lhotská

et al. 2023

IJMS

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A pot experiment was undertaken to investigate the effect of Cd, Pb and Zn multi-contamination on the physiological and metabolic response of carrot (Daucus carota L.) after 98 days of growth under greenhouse conditions. Multi-contamination had a higher negative influence on leaves (the highest Cd and Zn accumulation) compared to the roots, which showed no visible change in terms of anatomy and morphology. The results showed the following: (i) significantly higher accumulation of Cd, Zn, and Pb in the multi-contaminated variant (Multi) compared to the control; (ii) significant metabolic responses—an increase in the malondialdehyde content of the Multi variant compared to the control in the roots (by 20%), as well as in the leaves (by 53%); carotenoid content in roots decreased by 31% in the Multi variant compared with the control; and changes in free amino acids, especially those related to plant stress responses. The determination of hydroxyproline and sarcosine may reflect the higher sensitivity of carrot leaves to multi-contamination in comparison to roots. A similar trend was observed for the content of free methionine (significant increase of 31% only in leaves); (iii) physiological responses (significant decreases in biomass, changes in gas-exchange parameters and chlorophyll a); and (iv) significant changes in enzymatic activities (chitinase, alanine aminopeptidase, acid phosphatase) in the root zone.

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Section: Response Of Gas-exchange Parameters and Photosynthetic Pigme...mentioning

confidence: 71%

Response of Carrot (Daucus carota L.) to Multi-Contaminated Soil from Historic Mining and Smelting Activities

Novák,

Zemanová,

Lhotská

et al. 2023

IJMS

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“…Studies have shown that the application of exogenous MT significantly promoted the uptake of Fe, Mn, Cu, and Zn and reduced the accumulation of Cd in tissues of Platycladus orientalis seedlings. 36 Moreover, exogenous Spd, EBR, and SA exerted similar effects in inhibiting the uptake and translocation of metal-toxic elements in plants. Similarly, our study also revealed that different ES treatments significantly increased the levels of Mn, Cu, Zn, and Ca in blueberry fruits subjected to soil Cd toxicity while decreasing the accumulation of Cd; meanwhile, the contents of K, Mg, and Fe showed different patterns of variation among treatments (Table 1).…”

Section: Discussionmentioning

confidence: 96%

“…However, the excessive accumulation of Cd in plants disrupts the uptake and translocation of mineral elements and ultimately inhibits plant growth. Studies have shown that the application of exogenous MT significantly promoted the uptake of Fe, Mn, Cu, and Zn and reduced the accumulation of Cd in tissues of Platycladus orientalis seedlings . Moreover, exogenous Spd, EBR, and SA exerted similar effects in inhibiting the uptake and translocation of metal-toxic elements in plants.…”

Section: Discussionmentioning

confidence: 99%

LC–MS and GC–MS Metabolomics Analyses Revealed That Different Exogenous Substances Improved the Quality of Blueberry Fruits under Soil Cadmium Toxicity

Yang,

Wu,

Che

et al. 2023

J. Agric. Food Chem.

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Exogenous substances (ESs) can regulate plant growth and respond to environmental stress, but the effects of different ESs on blueberry fruit quality under soil cadmium (Cd) toxicity and related metabolic mechanisms are still unclear. In this study, four ES treatments [salicylic acid (SA), spermidine (Spd), 2,4-epibrassinolide (EBR), and melatonin (MT)] significantly increased blueberry fruit size, single-fruit weight, sweetness, and anthocyanin content under soil Cd toxicity and effectively reduced fruit Cd content to safe consumption levels by promoting mineral uptake (Ca, Mg, Mn, Cu and Zn). Furthermore, a total of 445, 360, 429, and 554 differentially abundant metabolites (DAMs) (LC−MS) and 63, 48, 79, and 73 DAMs (GC−MS) were identified from four comparison groups (SA/CK, Spd/CK, EBR/CK and MT/CK), respectively. The analyses revealed that ESs improved blueberry fruit quality and tolerance to Cd toxicity mainly by regulating the changes in metabolites related to ABC transporters, the TCA cycle, flavonoid biosynthesis, and phenylpropanoid biosynthesis.

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“… 31 In contrast, exogenous melatonin promotes the accumulation of osmoregulatory substances and maintains cellular osmotic balance. 57 Proline, as an osmoregulator, exists in the free state in plants with high hydration capacity and helps to maintain cellular stability. 58 , 59 After exogenous application of melatonin, both lower concentrations of melatonin significantly increased the concentration of soluble protein (SP) in grape leaves and roots, while higher concentrations (200 μM) decreased the SP concentration.…”

Section: Discussionmentioning

confidence: 99%

Exogenous melatonin delays leaves senescence and enhances saline and alkaline stress tolerance in grape seedlings

Yang,

Wei

et al. 2024

Plant Signaling & Behavior

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Saline and alkaline stress is one of the major abiotic stresses facing agricultural production, which severely inhibits the growth and yield of plant. The application of plant growth regulators can effectively prevent crop yield reduction caused by saline and alkaline stress. Exogenous melatonin (MT) can act as a signaling molecule involved in the regulation of a variety of physiological processes in plants, has been found to play a key role in enhancing the improvement of plant tolerance to abiotic stresses. However, the effects of exogenous MT on saline and alkaline tolerance of table grape seedlings and its mechanism have not been clarified. The aim of this study was to investigate the role of exogenous MT on morphological and physiological growth of table grape seedlings ( Vitis vinifera L.) under saline and alkaline stress. The results showed that saline and alkaline stress resulted in yellowing and wilting of grape leaves and a decrease in chlorophyll content, whereas the application of exogenous MT alleviated the degradation of chlorophyll in grape seedling leaves caused by saline and alkaline stress and promoted the accumulation of soluble sugars and proline content. In addition, exogenous MT increased the activity of antioxidant enzymes, which resulted in the scavenging of reactive oxygen species (ROS) generated by saline and alkaline stress. In conclusion, exogenous MT was involved in the tolerance of grape seedlings to saline and alkaline stress, and enhanced the saline and alkaline resistance of grape seedlings to promote the growth and development of the grape industry in saline and alkaline areas.

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Exogenous melatonin enhances Cd stress tolerance in Platycladus orientalis seedlings by improving mineral nutrient uptake and oxidative stress

Cited by 19 publications

References 61 publications

Response of Carrot (Daucus carota L.) to Multi-Contaminated Soil from Historic Mining and Smelting Activities

Response of Carrot (Daucus carota L.) to Multi-Contaminated Soil from Historic Mining and Smelting Activities

LC–MS and GC–MS Metabolomics Analyses Revealed That Different Exogenous Substances Improved the Quality of Blueberry Fruits under Soil Cadmium Toxicity

Exogenous melatonin delays leaves senescence and enhances saline and alkaline stress tolerance in grape seedlings

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