Effects of melatonin on growth, non-photochemical quenching and related components in tomato seedlings under calcium nitrate stress

Xie, Qingrong; Luo, Haotian; Cheng, Xiawei; Li, Zelin; Lü, Wei; He, Zhongqun; Zhou, Xiaoting

doi:10.1088/1755-1315/621/1/012104

Cited by 5 publications

(2 citation statements)

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“…This favored the conversion of captured light energy into chemical energy by photosynthetic pigments, maintained higher photochemical activity of PSII, supplied more energy for carbon assimilation, and effectively alleviated the inhibitory effect of NaCl stress on Ginkgo seedling photosynthesis. These findings are consistent with Xie et al's study [74]. However, the effectiveness of melatonin treatment is dependent on its concentration, the NaCl treatment concentration, and treatment duration.…”

Section: Relationship Between Exogenous Melatonin and Photosynthesis ...supporting

confidence: 92%

Effects of Exogenous Melatonin on the Growth and Physiological Characteristics of Ginkgo biloba L. under Salinity Stress Conditions

Zhou,

Li,

Wang

et al. 2024

Horticulturae

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Ginkgo (Ginkgo biloba L.) is a cherished relic among plants, commonly planted as a street tree. However, it faces cultivation challenges due to escalating soil salinization and widespread snowmelt application. Therefore, this study used 4-year-old Ginkgo seedlings to investigate how exogenous melatonin at varying concentrations affects seedling growth and physiology under salinity stress. The results revealed that appropriate melatonin concentrations (0.02, 0.1 mmol·L−1) significantly mitigated leaf yellowing under different NaCl stress levels. Furthermore, they increased ground diameter, current-year branch growth, relative water concentration, free proline, and soluble sugars in leaves. Melatonin also reduced electrolyte exudation rates, flavonoids, and malonic dialdehyde concentration, while enhancing peroxidase and superoxide dismutase activities. This led to reduced chlorophyll content, photosynthetic rate, stomatal conductance, and transpiration rate, stabilizing intercellular CO2 concentration, preserving photosynthetic structures, and enhancing photosynthetic rates. Additionally, the decline in the photosynthetic electron transport rate, the effective photochemical quantum yield of PSII, and the potential efficiency of primary conversion of light energy of PSII was alleviated. Minimal fluorescence and the non-photochemical quenching coefficient also improved. However, high melatonin concentration (0.5 mmol·L−1) exacerbated salinity stress. After analyzing composite scores, the 0.02 mmol·L−1 melatonin treatment was most effective in alleviating NaCl stress, while the 0.5 mmol·L−1 treatment intensified physiological stress under 200 mmol·L−1 NaCl stress. Principal component analysis and correlation analysis identified seven physiological indicators (photosynthetic rate, transpiration rate, photosynthetic electron transport rate, minimal fluorescence, superoxide dismutase, free proline, and chlorophyll a) and three growth indicators (ground diameter, branch length, and current-year branch thickness) as key markers for rapid salinity stress assessment in Ginkgo. These findings are crucial for addressing challenges associated with snowmelt’s impact on roadside Ginkgo trees, expanding planting areas, and breeding exceptional salt-tolerant Ginkgo varieties.

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Section: Relationship Between Exogenous Melatonin and Photosynthesis ...supporting

confidence: 92%

Effects of Exogenous Melatonin on the Growth and Physiological Characteristics of Ginkgo biloba L. under Salinity Stress Conditions

Zhou,

Li,

Wang

et al. 2024

Horticulturae

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“…Similarly, MT priming increased photosynthetic quantum yield (φPSII), the total content of chlorophyll, as well as RbcL and RbcS genes expression in Phaseolus vulgaris L. [45], while relative chlorophyll content and genes involved in photosynthesis (including ATPF0A, ATPF0B, ATPF1B and LHCB) genes were induced in melatonin-primed rubber tree (Hevea brasiliensis) grown under salt stress [46]. In addition, Xie et al [47] reported that MT decreased Y(NO) and Y(NPQ) in tomato seedlings under calcium nitrate stress.…”

Section: Discussionmentioning

confidence: 93%

Exogenous melatonin increases salt tolerance in bitter melon by regulating ionic balance, antioxidant system and secondary metabolism-related genes

et al. 2022

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Background Melatonin is a multi-functional molecule widely employed in order to mitigate abiotic stress factors, in general and salt stress in particular. Even though previous reports revealed that melatonin could exhibit roles in promoting seed germination and protecting plants during various developmental stages of several plant species under salt stress, no reports are available with respect to the regulatory acts of melatonin on the physiological and biochemical status as well as the expression levels of defense- and secondary metabolism-related related transcripts in bitter melon subjected to the salt stress. Results Herewith the present study, we performed a comprehensive analysis of the physiological and ion balance, antioxidant system, as well as transcript analysis of defense-related genes (WRKY1, SOS1, PM H+-ATPase, SKOR, Mc5PTase7, and SOAR1) and secondary metabolism-related gene expression (MAP30, α-MMC, polypeptide-P, and PAL) in salt-stressed bitter melon (Momordica charantia L.) plants in response to melatonin treatment. In this regard, different levels of melatonin (0, 75 and 150 µM) were applied to mitigate salinity stress (0, 50 and 100 mM NaCl) in bitter melon. Accordingly, present findings revealed that 100 mM salinity stress decreased growth and photosynthesis parameters (SPAD, Fv/Fo, Y(II)), RWC, and some nutrient elements (K+, Ca2+, and P), while it increased Y(NO), Y(NPQ), proline, Na+, Cl−, H2O2, MDA, antioxidant enzyme activity, and lead to the induction of the examined genes. However, prsiming with 150 µM melatonin increased SPAD, Fv/Fo, Y(II)), RWC, and K+, Ca2+, and P concentration while decreased Y(NO), Y(NPQ), Na+, Cl−, H2O2, and MDA under salt stress. In addition, the antioxidant system and gene expression levels were increased by melatonin (150 µM). Conclusions Overall, it can be postulated that the application of melatonin (150 µM) has effective roles in alleviating the adverse impacts of salinity through critical modifications in plant metabolism.

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The role of melatonin in tomato stress response, growth and development

et al. 2022

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Effects of melatonin on growth, non-photochemical quenching and related components in tomato seedlings under calcium nitrate stress

Cited by 5 publications

References 1 publication

Effects of Exogenous Melatonin on the Growth and Physiological Characteristics of Ginkgo biloba L. under Salinity Stress Conditions

Effects of Exogenous Melatonin on the Growth and Physiological Characteristics of Ginkgo biloba L. under Salinity Stress Conditions

Exogenous melatonin increases salt tolerance in bitter melon by regulating ionic balance, antioxidant system and secondary metabolism-related genes

The role of melatonin in tomato stress response, growth and development

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