Biochemical and physiological mechanism induced by melatonin in Mexican lime (Citrus aurantifolia Swingle) plants: cold and freezing stress

Khatam, Alireza Sanie; Rastegar, Somayeh; Jahromi, Abdolhossein Aboutalebi; Khankahdani, Hamed Hassanzadeh; Bagherian, Seyed Ali Akbar

doi:10.1007/s11738-023-03579-8

Cited by 2 publications

(2 citation statements)

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“…In this study, polysaccharides, total flavonoids, and total phenols were significantly increased in Dendrobium PLBs under MT treatment on the 30th day. This is consistent with the results of Gao Fan's research [62] on kiwi fruit (Actinidia deliciosa), Sanie Khatam's research [63] on citrus (Citrus reticulate Blanco), and He Xiuli's research [64] on golden line orchid (Anoectochilus roxburghii). In addition, the alkaloid content under the MT1 treatment was lower than that of the CK treatment, while alkaloid content under the MT2, MT3, and MT4 treatments was higher than that of the CK treatment.…”

Section: Discussionsupporting

confidence: 90%

Effect of Melatonin on the Growth of Dendrobium officinale Protocorm-Like Bodies

Tang,

Huang,

Yuan

et al. 2024

Agronomy

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Dendrobium officinale Kimura & Migo is a perennial herbaceous plant of the genus Dendrobium in the family of Orchidaceae with high medicinal value. Melatonin (MT) is an indole-like tryptamine with functions such as regulating plant growth and development. This experiment investigated the effects of different concentrations of MT on the growth and development of protocorms of D. officinale protocorm-like bodies (PLBs). The results showed that the changes in morphological indicators such as color, cluster size, and surface changes were more significant under 75 µM MT than those of 0 µM (CK), and the appearance of white on the PLB surface was expedited, which was more conducive to the proliferation of PLBs. MT treatment of 100 µM inhibited the differentiation of adventitious buds, and the contents of photosynthetic pigments, polysaccharides, and flavonoids were significantly increased. Moreover, as compared with CK, the activities of superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) in PLBs increased significantly, while the content of malondialdehyde (MDA) decreased gradually with 75 µM or less. In conclusion, a concentration of 75 µM melatonin can enhance the rapid propagation rate of D. officinale in vitro, providing insights into the effects of melatonin on the growth of tissue-cultured D. officinale seedlings.

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Section: Discussionsupporting

confidence: 90%

Effect of Melatonin on the Growth of Dendrobium officinale Protocorm-Like Bodies

Tang,

Huang,

Yuan

et al. 2024

Agronomy

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“…Exogenous application of MT can penetrate the plasma membranes increasing the endogenous MT levels [23,41]. Endogenous MT is produced from tryptophan as an intermediate product of the shikimate pathway in the chloroplasts [42].…”

Section: Introductionmentioning

confidence: 99%

Mechanistic Approach on Melatonin-Induced Hormesis of Photosystem II Function in the Medicinal Plant Mentha spicata

Moustakas,

Sperdouli,

Adamakis

et al. 2023

Plants

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Melatonin (MT) is considered a new plant hormone having a universal distribution from prokaryotic bacteria to higher plants. It has been characterized as an antistress molecule playing a positive role in the acclimation of plants to stress conditions, but its impact on plants under non-stressed conditions is not well understood. In the current research, we evaluated the impact of MT application (10 and 100 μM) on photosystem II (PSII) function, reactive oxygen species (ROS) generation, and chlorophyll content on mint (Mentha spicata L.) plants in order to elucidate the molecular mechanism of MT action on the photosynthetic electron transport process that under non-stressed conditions is still unclear. Seventy-two hours after the foliar spray of mint plants with 100 μM MT, the improved chlorophyll content imported a higher amount of light energy capture, which caused a 6% increase in the quantum yield of PSII photochemistry (ΦPSII) and electron transport rate (ETR). Nevertheless, the spray with 100 μM MT reduced the efficiency of the oxygen-evolving complex (OEC), causing donor-side photoinhibition, with a simultaneous slight increase in ROS. Even so, the application of 100 μM MT decreased the excess excitation energy at PSII implying superior PSII efficiency. The decreased excitation pressure at PSII, after 100 μM MT foliar spray, suggests that MT induced stomatal closure through ROS production. The response of ΦPSII to MT spray corresponds to a J-shaped hormetic curve, with ΦPSII enhancement by 100 μM MT. It is suggested that the hormetic stimulation of PSII functionality was triggered by the non-photochemical quenching (NPQ) mechanism that stimulated ROS production, which enhanced the photosynthetic function. It is concluded that MT molecules can be used under both stress and non-stressed conditions as photosynthetic biostimulants for enhancing crop yields.

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Biochemical and physiological mechanism induced by melatonin in Mexican lime (Citrus aurantifolia Swingle) plants: cold and freezing stress

Cited by 2 publications

References 50 publications

Effect of Melatonin on the Growth of Dendrobium officinale Protocorm-Like Bodies

Effect of Melatonin on the Growth of Dendrobium officinale Protocorm-Like Bodies

Mechanistic Approach on Melatonin-Induced Hormesis of Photosystem II Function in the Medicinal Plant Mentha spicata

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