Exogenous melatonin mitigates the salinity damages and improves the growth of pistachio under salinity stress

Kamiab, Fereshteh

doi:10.1080/01904167.2020.1730898

Cited by 52 publications

(22 citation statements)

References 65 publications

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“…The negative effects of salt stress on the chlorophyll content of the sugar beets were alleviated by applying melatonin. This result agrees with a study by Kamiab [ 48 ], who reported that melatonin protects the ultrastructure of chloroplasts and improves the activity of chlorophyll synthase to promote the formation of chlorophyll in pistachios under salt stress. Furthermore, the application of melatonin to sugar beets exposed to salt stress increased the relative expression of CHLG , POR , and CAO genes ( Figure 8 ), which provides direct support for this conclusion.…”

Section: Discussionsupporting

confidence: 93%

“…In our study, the application of melatonin further increased the contents of osmolytes, including betaine, proline, and soluble sugar ( Figure 3 A–C), and upregulated the expression of genes, including BADH and P5CS ( Figure 8 ), suggesting that melatonin plays an important role in the resistance of sugar beets to salt stress. Previous studies have demonstrated that the accumulation of these osmolytes induced by melatonin reduces the osmotic potential of cells, which improves osmotic adjustment and thus enhances the water content of plants under adverse environments [ 48 , 51 ]. The results of the current study directly support this conclusion since melatonin-treated sugar beets exhibited increases in WC and RWC and decreases in OP compared with non-treated plants under salt stress ( Figure 3 D–F).…”

Section: Discussionmentioning

confidence: 99%

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Beneficial Effects of Exogenous Melatonin on Overcoming Salt Stress in Sugar Beets (Beta vulgaris L.)

Zhang

Liu

Wang

et al. 2021

Plants

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Melatonin has been regarded as a promising substance that enhances the abiotic stress tolerance of plants. However, few studies have devoted attention to the role of melatonin in improving salt tolerance in sugar beets. Here, the effects of different application methods (foliar application (100 μM), root application (100 μM), and combined foliar and root application) of melatonin on the morphological and physiological traits of sugar beets exposed to salt stress were investigated. The results showed that melatonin improved the growth of sugar beet seedlings, root yield and sugar content, synthesis of chlorophyll, photosystem II (PS II) activity, and gas exchange parameters under salt stress conditions. Moreover, melatonin enhanced the capacity of osmotic adjustment by increasing the accumulation of osmolytes (betaine, proline, and soluble sugar). At the same time, melatonin increased the H+-pump activities in the roots, thus promoting Na+ efflux and K+ influx, which maintained K+/Na+ homeostasis and mitigated Na+ toxicity. In addition, melatonin strengthened the antioxidant defense system by enhancing the activities of antioxidant enzymes, modulating the ASA-GSH cycle, and mediating the phenylalanine pathway, which removed superoxide anions (O2•−) and hydrogen peroxide (H2O2) and maintained cell membrane integrity. These positive effects were more pronounced when melatonin was applied by combined foliar and root application. To summarize, this study clarifies the potential roles of melatonin in mitigating salt stress in sugar beets by improving photosynthesis, water status, ion homeostasis, and the antioxidant defense system.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Beneficial Effects of Exogenous Melatonin on Overcoming Salt Stress in Sugar Beets (Beta vulgaris L.)

Zhang

Liu

Wang

et al. 2021

Plants

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“…The salt-induced tomato seedling maintained enhanced proline content when treated with melatonin (Manzer et al, 2019). Similar results of increased proline content was observed in pistachio leaves treated with melatonin under salt stress (Kamiab, 2020). These earlier findings support the present investigation.…”

Section: Proline Contentsupporting

confidence: 92%

Exogenous melatonin on Physiological and Yield Traits of Cassava (Manihot esculenta Crantz) under Salt Stress

Bhavithra¹,

Kalarani²,

Senthil³

et al. 2021

MAJ

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The present investigation to evaluate the impact of melatonin on physiological, biochemical characters and yield potential of cassava under salt stress condition. The present study was carried out in cassava variety Sree Athulya with nine treatments under 120mM NaCl salt stress condition. Different treatments viz., sett treatment and foliar application of 100 ppm melatonin was done at 30 and 60 DAP of the crop growth. Control (salt stress + no melatonin) and absolute control (no stress and melatonin) also maintained for comparison purpose. The salt stress of 120 mM NaCl was imposed from day one to120 days. Observations done on 45, 75 and 135 days after planting revealed that foliar spray of 100 ppm melatonin at 30 days after planting recorded percent increase of 33.56 in photosynthetic rate, 37.28 in stomatal conductance, 13.60 in transpiration rate and sett treatment plus foliar spray at 30 and 60 days after planting showed maximum osmotic adjustment, osmotic potential, proline (16.54 %) and soluble protein content (10.32 %). The melatonin treated plants are efficient in producing higher yield than untreated one under salt stress.

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“…In the case of tomato fruits harvested at low temperatures, previous melatonin treatment improved thermotolerance, increasing PAs, proline and NO levels (Aghdam et al 2019). Other examples include apple plants in alkaline stress (Gong et al 2017), cucumber seedlings in chilling stress (Zhao et al 2017), wheat seedlings in salt stress (Ke et al 2018), alfalfa plants in waterlogging stress (Zhang et al 2019a), pistachio seedlings in salt stress (Kamiab 2020) and Pinella ternata plants in heat stress (Ma et al 2020). In all these cases, there was an increased in PAs after melatonin treatment that improved stress tolerance (Table 1).…”

Section: Melatonin and Plant Hormone Relationshipsmentioning

confidence: 99%

Melatonin as a regulatory hub of plant hormone levels and action in stress situations

2020

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Melatonin, a molecule first discovered in animal tissues, plays an important role in multiple physiological responses as a possible plant master regulator. It mediates responses to different types of stress, both biotic and abiotic. Melatonin reduces the negative effects associated with stressors, improving the plant response by increasing plant stress tolerance. When plants respond to stress situations, they use up a large amount of plant resources through a set of perfectly synchronized actions. Responses mediated by melatonin use the plant's hormones to, after adequate modulation, counteract and overcome the negative action of the stressor. In this paper, we review melatonin-plant hormone relationships. Factors that trigger the stress response and the central role of melatonin are analysed. An extensive analysis of current studies shows that melatonin modulates the metabolism of plant hormones (biosynthesis and catabolism), the rise or fall in their endogenous levels, the regulation of signalling elements and how melatonin affects the final response of auxin, gibberellins, cytokinins, abscisic acid, ethylene, salicylic acid, jasmonates, brassinosteroids, polyamines and strigolactones. Lastly, a general overview of melatonin's actions and its regulatory role at a global level is provided and proposals for future research are made.

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Exogenous melatonin mitigates the salinity damages and improves the growth of pistachio under salinity stress

Cited by 52 publications

References 65 publications

Beneficial Effects of Exogenous Melatonin on Overcoming Salt Stress in Sugar Beets (Beta vulgaris L.)

Beneficial Effects of Exogenous Melatonin on Overcoming Salt Stress in Sugar Beets (Beta vulgaris L.)

Exogenous melatonin on Physiological and Yield Traits of Cassava (Manihot esculenta Crantz) under Salt Stress

Melatonin as a regulatory hub of plant hormone levels and action in stress situations

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