Seed Priming With Melatonin Promotes Seed Germination and Seedling Growth of Triticale hexaploide L. Under PEG-6000 Induced Drought Stress

Guo, Yuhui; Li, Dongxiao; Liu, Liantao; Sun, Huimin; Zhu, Lingxiao; Zhang, Ke; Zhao, Haitao; Zhang, Yongjiang; Li, Anchang; Bai, Zhiying; Tian, Liwen; Dong, Hezhong; Li, Cundong

doi:10.3389/fpls.2022.932912

Cited by 23 publications

(17 citation statements)

References 59 publications

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“…The results show that the highest germination rate was found in GA 3 2 and BR4 hormones and chitosan2 osmotic priming treatments. The possible explanation for these increases is that GA and BR hormones are growth-promoting hormones involved in seed germination and inhibiting the water uptake accompanying embryonic growth ( Aziz and Pekşen, 2020 ; Heshmati et al., 2021 ; Guo et al., 2022 ). The vigor index is the percentage of viable seeds, and vigor testing assesses the seed’s capacity to grow healthy seedlings under less-than-ideal or challenging conditions.…”

Section: Discussionmentioning

confidence: 99%

“…The optimal seed priming treatment concentration was screened out according to the germination dynamics and seedling growth status. Germination potential (GP), germination rate (GR), and vigor index (VI) were recorded through equation 1, equation 2, and equation 3 respectively ( Guo et al., 2022 ).…”

Section: Methodsmentioning

confidence: 99%

“…However, during germination, the spring-sowing rice is frequently affected by cold weather when the temperature declines below 12°C and lasts for more than one week, resulting in lower germination rates and reduced root growth or even complete failure of the total early-season rice ( Liao et al., 2019 ; Liao et al., 2020 ). Alternatively, seed priming is an efficient, practical, and simple technique to increase rapid and uniform emergence, high seedling vigor, and yield in many field crops under unfavorable environmental conditions ( Zulfiqar, 2021 ; Guo et al., 2022 ; Liu X. et al., 2022 ; Mohapatra et al., 2022 ).…”

Section: Introductionmentioning

confidence: 99%

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Effects of various seed priming on morphological, physiological, and biochemical traits of rice under chilling stress

Zhang

Zhang²,

Gao³

et al. 2023

Front. Plant Sci.

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Introduction/BackgroundDirect-seeded rice is exceptionally vulnerable to chilling stress, especially at the seed germination and seedling growth stages in the early season of the double cropping system.MethodsTherefore, we conducted two experiments to evaluate the role of various seed primings and their different concentrations of plant growth regulators [experiment 1—abscisic acid (ABA), gibberellin (GA3), salicylic acid (SA), brassinolide (BR), paclobutrazol, uniconazole (UN), melatonin (MT), and jasmonic acid (JA)] and osmopriming substances (chitosan, polyethylene glycol 6000 (PEG6000), and CaCl2) and experiment 2—GA, BR (two best), CaCl2 (worst), and control (CK)] on rice seedlings under low temperature condition.ResultsResults showed that the maximum germination rate of 98% was recorded in GA3 (10 mgL−1) and BR (0.3 mgL−1) among treatments. Compared to CK, root and shoot length were improved in ABA (0.5 mgL−1) and GA3 (100 mgL−1) by 64% and 68%, respectively. At the same time, root and shoot weights (fresh and dry) were enhanced in Paclobutrazol (300 mgL−1) and GA3 among treatments. Furthermore, the average root volume, average root diameter, and total root surface area were increased by 27%, 38%, and 33% in Paclobutrazol (300 mgL−1), Paclobutrazol (200 mgL−1) and JA (1 mgL−1) treatments, respectively compared to CK. In the second experiment, a respective increase of 26%, 19%, 38%, and 59% was noted in SOD, POD, CAT, and APX enzyme activities in GA treatment compared to CK. Similarly, proline, soluble sugar, soluble protein, and GA content were also improved by 42%, 25.74%, 27%, and 19%, respectively, in GA treatment compared to CK. However, a respective reduction of 21% and 18% was noted in MDA and ABA content in GA treatment compared to CK. Our finding highlighted that better germination of primed-rice seedlings was associated with fresh and dry weights of the roots and shoots and the average root volume of the seedlings.DiscussionOur results suggested that GA3 (10 mg L−1) and BR (0.3 mg L−1) seed priming prevent rice seedlings from chilling-induced oxidative stress by regulating antioxidant enzyme activities and maintaining ABA, GA, MDA, soluble sugar, and protein content. However, further studies (transcriptome and proteome) are needed to explore the molecular mechanisms involved in seed priming-induced chilling tolerance under field conditions.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of various seed priming on morphological, physiological, and biochemical traits of rice under chilling stress

Zhang

Zhang²,

Gao³

et al. 2023

Front. Plant Sci.

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“…Results showed not only SAM lack of phytotoxicity, but also stimulation of seeds germination percentage. Positive role of various metabolites was shown also in other seed germination experiments e.g., priming of triticale ( Triticale hexaploide L.) seeds with melatonin resulted in increased germination rate by 57.67% [ 66 ]. In other experiments it was shown that treatment of seeds with gibberellic acid and/or Indole Acetic Acid (IAA) improved germination parameters and subsequent cultivation of Masson pine ( Pinus massoniana ) and Aspilia Africana [ 67 , 68 ].…”

Section: Discussionmentioning

confidence: 91%

Metabolically versatile psychrotolerant Antarctic bacterium Pseudomonas sp. ANT_H12B is an efficient producer of siderophores and accompanying metabolites (SAM) useful for agricultural purposes

et al. 2023

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Background Bacterial siderophores are chelating compounds with the potential of application in agriculture, due to their plant growth-promoting (PGP) properties, however, high production and purification costs are limiting factors for their wider application. Cost-efficiency of the production could be increased by omitting purification processes, especially since siderophores accompanying metabolites (SAM) often also possess PGP traits. In this study, the metabolism versatility of Pseudomonas sp. ANT_H12B was used for the optimization of siderophores production and the potential of these metabolites and SAM was characterized in the context of PGP properties. Results The metabolic diversity of ANT_H12B was examined through genomic analysis and phenotype microarrays. The strain was found to be able to use numerous C, N, P, and S sources, which allowed for the design of novel media suitable for efficient production of siderophores in the form of pyoverdine (223.50–512.60 μM). Moreover, depending on the culture medium, the pH of the siderophores and SAM solutions varied from acidic (pH < 5) to alkaline (pH > 8). In a germination test, siderophores and SAM were shown to have a positive effect on plants, with a significant increase in germination percentage observed in beetroot, pea, and tobacco. The PGP potential of SAM was further elucidated through GC/MS analysis, which revealed other compounds with PGP potential, such as indolic acetic acids, organic acids, fatty acids, sugars and alcohols. These compounds not only improved seed germination but could also potentially be beneficial for plant fitness and soil quality. Conclusions Pseudomonas sp. ANT_H12B was presented as an efficient producer of siderophores and SAM which exhibit PGP potential. It was also shown that omitting downstream processes could not only limit the costs of siderophores production but also improve their agricultural potential.

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“…MEL treatment resulted in higher SG rate and germination index due to higher germination potential and elevated levels of total polyunsaturated FAs, and double bond index under DS 106,107 . MEL priming improved SG by increasing AO activity and reducing ROS production and malonaldehyde contents in seeds under polyethylene glycol‐6000 (PEG6000) induced DS 108 . Moreover, osmo‐priming with MEL enhances seed hydration which subsequently increases hydrolysis of reserve materials, thus improves SG 109 …”

Section: Mel Sg and Abiotic Stressorsmentioning

confidence: 99%

Melatonin as a key regulator in seed germination under abiotic stress

Wang,

Tanveer,

Wang

et al. 2024

Journal of Pineal Research

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Seed germination (SG) is the first stage in a plant's life and has an immense importance in sustaining crop production. Abiotic stresses reduce SG by increasing the deterioration of seed quality, and reducing germination potential, and seed vigor. Thus, to achieve a sustainable level of crop yield, it is important to improve SG under abiotic stress conditions. Melatonin (MEL) is an important biomolecule that interplays in developmental processes and regulates many adaptive responses in plants, especially under abiotic stresses. Thus, this review specifically summarizes and discusses the mechanistic basis of MEL‐mediated SG under abiotic stresses. MEL regulates SG by regulating some stress‐specific responses and some common responses. For instance, MEL induced stress specific responses include the regulation of ionic homeostasis, and hydrolysis of storage proteins under salinity stress, regulation of C‐repeat binding factors signaling under cold stress, starch metabolism under high temperature and heavy metal stress, and activation of aquaporins and accumulation of osmolytes under drought stress. On other hand, MEL mediated regulation of gibberellins biosynthesis and abscisic acid catabolism, redox homeostasis, and Ca2+ signaling are amongst the common responses. Nonetheless factors such as endogenous MEL contents, plant species, and growth conditions also influence above‐mentioned responses. In conclusion, MEL regulates SG under abiotic stress conditions by interacting with different physiological mechanisms.

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Seed Priming With Melatonin Promotes Seed Germination and Seedling Growth of Triticale hexaploide L. Under PEG-6000 Induced Drought Stress

Cited by 23 publications

References 59 publications

Effects of various seed priming on morphological, physiological, and biochemical traits of rice under chilling stress

Effects of various seed priming on morphological, physiological, and biochemical traits of rice under chilling stress

Metabolically versatile psychrotolerant Antarctic bacterium Pseudomonas sp. ANT_H12B is an efficient producer of siderophores and accompanying metabolites (SAM) useful for agricultural purposes

Melatonin as a key regulator in seed germination under abiotic stress

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