Melatonin alleviates iron stress by improving iron homeostasis, antioxidant defense and secondary metabolism in cucumber

Ahammed, Golam Jalal; Wu, Meijuan; Wang, Yaqi; Yan, Ying-Bin; Mao, Qi; Ren, Jingjing; Ma, Ronghui; Liu, Airong; Chen, Shuangchen

doi:10.1016/j.scienta.2020.109205

Cited by 155 publications

(67 citation statements)

References 45 publications

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“…The percentage of plants that were viable 6-day after recovery at the optimum growth conditions was recorded. The accumulation of superoxide (O 2 − ) and hydrogen peroxide (H 2 O 2 ) in the leaves was detected using nitroblue tetrazolium (NBT) and 3,3 -diaminobenzidine (DAB) staining, respectively, as previously described (Xia et al, 2009;Ahammed et al, 2020).…”

Section: Cold Tolerance Assaysmentioning

confidence: 99%

PGR5/PGRL1 and NDH Mediate Far-Red Light-Induced Photoprotection in Response to Chilling Stress in Tomato

et al. 2020

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Section: Cold Tolerance Assaysmentioning

confidence: 99%

PGR5/PGRL1 and NDH Mediate Far-Red Light-Induced Photoprotection in Response to Chilling Stress in Tomato

et al. 2020

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“…Melatonin (N-acetyl-5-methoxytryptamine, MT), a regulatory molecule with various biological functions, has been detected in regards to the regulation of seed germination, root development, leaf senescence, and fruit maturation in plants ( Ahammed et al, 2020b ; Liang et al., 2018a ; Liang et al., 2018b ). In addition to its physiological functions, MT can also enhance plant tolerance against multiple adverse environmental stressors ( Hardeland et al., 2011 ; Posmyk et al, 2009 ; Li et al, 2018 ; Ahammed et al, 2020b ; Li et al, 2020 ). Numerous studies have shown that MT plays an important role in seed germination and plant growth may be associated with MT-induced changes in physiological mechanisms ( Posmyk et al, 2009 ; Zhao et al, 2011 ; Kang et al, 2010 ).…”

Section: Introductionmentioning

confidence: 99%

Melatonin improves the germination rate of cotton seeds under drought stress by opening pores in the seed coat

Bai

Xiao

Zhang

et al. 2020

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The germination of cotton (Gossypium hirsutum L.) seeds is affected by drought stress; however, little is known about the physiological mechanism affecting germination and the effect of melatonin (MT) on cotton seed germination under drought stress. Therefore, we studied the effects of exogenous MT on the antioxidant capacity and epidermal microstructure of cotton under drought stress. The results demonstrated a retarded water absorption capacity of testa under drought stress, significantly inhibiting germination and growth in cotton seeds. Drought stress led to the accumulation of reactive oxygen species (ROS), malondialdehyde (MDA), and osmoregulatory substances (e.g., proline, soluble protein, and soluble sugars); it also decreased the activity of antioxidant enzymes and α-amylase. Drought stress inhibited gibberellin acid (GA3) synthesis and increased abscisic acid (ABA) content, seriously affecting seed germination. However, seeds pre-soaked with MT (100 µM) showed a positive regulation in the number and opening of stomata in cotton testa. The exogenous application of MT increased the germination rate, germination potential, radical length, and fresh weight, as well as the activities of superoxide dismutase (SOD), peroxidase (POD), and α-amylase. In addition, MT application increased the contents of organic osmotic substances by decreasing the hydrogen peroxide (H2O2), superoxide anion (O2-), and MDA levels under drought stress. Further analysis demonstrated that seeds pre-soaked with MT alleviated drought stress by affecting the ABA and GA3 contents. Our findings show that MT plays a positive role in protecting cotton seeds from drought stress.

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“…Macronutrients and micronutrients are the elements required necessarily for growth and development of plants [1]. N (Nitrogen), P (Phosphorus) and K (Potassium) were needed at relatively large amounts for plants.…”

Section: Introductionmentioning

confidence: 99%

miR168 targets Argonaute1A mediated miRNAs regulation pathways in response to potassium deficiency stress in tomato

et al. 2020

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Background Potassium (K+) is an essential ion for most plants, as it is involved in the regulation of growth and development. K+ homeostasis in plant cells has evolved to facilitate plant adaptation to K+-deficiency stress. Argonaute1 (AGO1) is regulated by miR168 to modulate the small RNA regulatory pathway by RNA silencing complex (RISC) in tomatoes. However, the role of miR168-mediated regulation of AGO1 in the context of K+ deficiency stress in tomatoes has not been elucidated yet. Results SlmiR168 and its target gene SlAGO1A were differentially expressed among low-K+-tolerant JZ34 and low-K+-sensitive JZ18 tomato plants. Transgenic tomato plants constitutively expressing pri-SlmiR168a showed stronger root system growth, better leaves development, and higher K+ contents in roots under K+-deficiency stress than those of the transgenic tomato lines expressing rSlAGO1A (SlmiR168-resistant) and the wild type (WT). Deep sequencing analysis showed that 62 known microRNAs (miRNAs) were up-regulated in 35S:rSlAGO1 compared with WT tomatoes. The same miRNAs were down-regulated in 35S:SlmiR168a compared with WT plants. The integrated analysis found 12 miRNA/mRNA pairs from the 62 miRNAs, including the root growth and cytokinin (CTK)/abscisic acid (ABA) pathways. Conclusions The regulation mediated by SlmiR168 of SlAGO1A contributes to the plant development under low-K+ stress. Moreover, this regulation mechanism may influence downstream miRNA pathways in response to low-K+ stress through the CTK/ABA and root growth modulation pathways.

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Melatonin alleviates iron stress by improving iron homeostasis, antioxidant defense and secondary metabolism in cucumber

Cited by 155 publications

References 45 publications

PGR5/PGRL1 and NDH Mediate Far-Red Light-Induced Photoprotection in Response to Chilling Stress in Tomato

PGR5/PGRL1 and NDH Mediate Far-Red Light-Induced Photoprotection in Response to Chilling Stress in Tomato

Melatonin improves the germination rate of cotton seeds under drought stress by opening pores in the seed coat

miR168 targets Argonaute1A mediated miRNAs regulation pathways in response to potassium deficiency stress in tomato

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