Physiological Effects of Exogenous Melatonin on Leaves of Kiwifruit Seedlings under Drought Stress

Hui, Xia; Huang, Xiaojing; Wang, Jin; Lv, Xiulan; Liang, Dong

doi:10.2991/ifeesm-17.2018.230

Cited by 4 publications

(4 citation statements)

References 6 publications

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“…The electric conductivity was measured as described previously [33]. Fresh leaves were obtained from the same part of the seedlings, 0.5 g weighed, 20 ml of distilled water added, and completely submerged in the solution.…”

Section: Oxidative Stress and Electrical Conductivity Measurementmentioning

confidence: 99%

Genome-wide analysis of Myo-inositol oxygenase gene family in tomato reveals their involvement in ascorbic acid accumulation

et al. 2020

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Background: Ascorbic acid (Vitamin C, AsA) is an antioxidant metabolite involved in plant development and environmental stimuli. AsA biosynthesis has been well studied in plants, and MIOX is a critical enzyme in plants AsA biosynthesis pathway. However, Myo-inositol oxygenase (MIOX) gene family members and their involvement in AsA biosynthesis and response to abiotic stress remain unclear. Results: In this study, five tomato genes encoding MIOX proteins and possessing MIOX motifs were identified. Structural analysis and distribution mapping showed that 5 MIOX genes contain different intron/exon patterns and unevenly distributed among four chromosomes. Besides, expression analyses indicated the remarkable expression of SlMIOX genes in different plant tissues. Furthermore, transgenic lines were obtained by over-expression of the MIOX4 gene in tomato. The overexpression lines showed a significant increase in total ascorbate in leaves and red fruits compared to control. Expression analysis revealed that increased accumulation of AsA in MIOX4 overexpression lines is possible as a consequence of the multiple genes involved in AsA biosynthesis. Myo inositol (MI) feeding in leaf and fruit implied that the Myo-inositol pathway improved the AsA biosynthesis in leaves and fruits. MIOX4 overexpression lines exhibited a better light response, abiotic stress tolerance, and AsA biosynthesis capacity. Conclusions: These results showed that MIOX4 transgenic lines contribute to AsA biosynthesis, evident as better light response and improved oxidative stress tolerance. This study provides the first comprehensive analysis of the MIOX gene family and their involvement in ascorbate biosynthesis in tomato.

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Section: Oxidative Stress and Electrical Conductivity Measurementmentioning

confidence: 99%

Genome-wide analysis of Myo-inositol oxygenase gene family in tomato reveals their involvement in ascorbic acid accumulation

et al. 2020

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show abstract

“…The electric conductivity was measured as described previously [19]. Fresh leaves were obtained from the same part of the seedlings, 0.5g weighed, 20ml of distilled water added and completely submerged in the solution.…”

Section: Oxidative Stressand Electrical Conductivity Measurementmentioning

confidence: 99%

Genome-wide analysis of Myo-inositol oxygenase gene family in tomato reveals their involvement in ascorbic acid accumulation

Munir

Mumtaz

Ahiakpa

et al. 2019

Preprint

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Background Ascorbic acid (Vitamin C, AsA) is an antioxidant metabolite involved in plant development and environmental stimuli. AsA biosynthesis has been well studied in plants and MIOX is a critical enzyme in plants AsA biosynthesis pathway. However, myo-inositol oxygenase (MIOX) gene family members and their involvement in AsA biosynthesis and response to abiotic stress remain unclear. Results In this study, five tomato genes encoding MIOX proteins and possessing MIOX motifs were identified. Structural analysis and distribution mapping showed that 5 MIOX genes contain different intron/exon patterns and unevenly distributed among four chromosomes. In addition, expression analyses indicated the remarkable expression of SlMIOX genes in different plant tissues. Furthermore, transgenic lines were obtained by over-expression of MIOX4 gene in tomato. The overexpression lines showed a significant increase in total ascorbate in leaves and red fruits compared to control. Expression analysis revealed that increased accumulation of AsA in MIOX4 overexpression lines is possible as a consequence of the multiple genes involved in AsA biosynthesis. Myo inositol (MI) feeding in leaf and fruit implied that AsA biosynthesis was mainly improved by Myo-inositol pathway in leaves and fruits. MIOX4 overexpression lines exhibited a betterlight response, abiotic stress tolerance, and AsA biosynthesis capacity. Conclusions These results showed that MIOX4 transgenic lines contribute to AsA biosynthesis, evident as better light response and improved oxidative stress tolerance. This study provides the first comprehensive analysis of MIOX gene family and their involvement in ascorbate biosynthesis in tomato.

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“…Furthermore, melatonin therapy did not inhibit the accumulation of MDA with water stress even though the values declined with a rise in concentration. MDA levels were greater in drought-stressed kiwifruit seedlings that did not receive melatonin, and lower in seedlings that got melatonin pretreatment in other investigations [XIA et al 2018]. The explanation underlying water stress devastating impact is the massive creation of reactive oxygen species (ROS) and malondialdehyde (MDA) over cell tolerance abilities [ARNAO, HERNÁNDEZ-RUIZ 2007].…”

Section: Discussionmentioning

confidence: 99%

Journal of Water and Land Development

Hassan,

Gaballah,

Ogbaga

et al. 2022

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Drought is regarded as one of the environmental constraints threatening agriculture worldwide. Melatonin is a pleiotropic molecule prevalent in plants capable of promoting plant endogenous resilience to many environmental challenges including drought. Banana is an important staple food consumed in developing countries especially in Africa. In this research, we studied the role of melatonin in the growth of bananas subjected to drought under the Egyptian semi-arid conditions. To achieve this objective, a field experiment on banana (Musa spp., cv. Williams) mother plants and first ratoon was conducted on a private farm for two seasons -2019 and 2020. Three irrigation treatments, 100, 90 and 80% irrigation water requirements (IWR) were used in conjunction with four concentrations of melatonin as a foliar spray (0 µmol, 40 µmol, 60 µmol, and 80 µmol) to determine the effect of both treatments on banana plant performance under drought. The results showed that there was a substantial difference between treatments, with the foliar application of melatonin at 80 µmol concentration improving most of the yield attributes, relative water content, total chlorophyll and proline with water deficit. However, the foliar application of the molecule lowered the biochemical characteristics mostly at 80% IWR under the Egyptian semi-arid conditions. Overall, there was a concentration-dependent response with regards to IWR for the two seasons 2019 and 2020.

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Physiological Effects of Exogenous Melatonin on Leaves of Kiwifruit Seedlings under Drought Stress

Cited by 4 publications

References 6 publications

Genome-wide analysis of Myo-inositol oxygenase gene family in tomato reveals their involvement in ascorbic acid accumulation

Genome-wide analysis of Myo-inositol oxygenase gene family in tomato reveals their involvement in ascorbic acid accumulation

Genome-wide analysis of Myo-inositol oxygenase gene family in tomato reveals their involvement in ascorbic acid accumulation

Journal of Water and Land Development

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