Effects of alkaline stress on organic acid metabolism in roots of grape hybrid rootstocks

Guo, Shuai; Niu, Yanjie; Zhai, Heng; Han, Ning; Du, Yuanpeng

doi:10.1016/j.scienta.2017.09.051

Cited by 37 publications

(29 citation statements)

References 14 publications

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“…The activity of phosphoenolpyruvate carboxylase was regulated by phosphoenolpyruvate carboxylase kinases, which were substantially upregulated by NaHCO 3 stress (Xiang et al, 2019). A relative study also showed that proton pump H + -ATPase may play an important role in organic acid secretion from roots under NaHCO 3 stress (Guo et al, 2018). A study on tomato indicated that both the roots and leaves of plants maintained the ion balance by enhancing the synthesis of organic acids such as citrate, formate, lactate, acetate, succinate, malate and oxalate under salt and alkali stress.…”

Section: Maintaining Intracellular Ph Stability Through Secreting and Synthesizing Organic Acidsmentioning

confidence: 94%

Response Mechanisms of Plants Under Saline-Alkali Stress

2021

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As two coexisting abiotic stresses, salt stress and alkali stress have severely restricted the development of global agriculture. Clarifying the plant resistance mechanism and determining how to improve plant tolerance to salt stress and alkali stress have been popular research topics. At present, most related studies have focused mainly on salt stress, and salt-alkali mixed stress studies are relatively scarce. However, in nature, high concentrations of salt and high pH often occur simultaneously, and their synergistic effects can be more harmful to plant growth and development than the effects of either stress alone. Therefore, it is of great practical importance for the sustainable development of agriculture to study plant resistance mechanisms under saline-alkali mixed stress, screen new saline-alkali stress tolerance genes, and explore new plant salt-alkali tolerance strategies. Herein, we summarized how plants actively respond to saline-alkali stress through morphological adaptation, physiological adaptation and molecular regulation.

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Section: Maintaining Intracellular Ph Stability Through Secreting and Synthesizing Organic Acidsmentioning

confidence: 94%

Response Mechanisms of Plants Under Saline-Alkali Stress

2021

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“…Additionally, the amount of root exudates have been shown to vary between plant species and cultivars under different growing conditions [20][21][22]24]. This indicates that the sensitive oat cultivar may secrete more exudates than resistance oat cultivar in response to environmental stress [49], which may cost more plants energy and led to restricted plant growth [23,24]. Therefore, if root exudates can be used as an indicator of plant health, these compounds not only identify tolerant cultivars but may also be a suitable strategy for increasing crop productivity in saline-alkaline soils.…”

Section: The Relationship Between Oat Morphologies and Root Exudates mentioning

confidence: 99%

Response of oat morphologies, root exudates, and rhizosphere fungal communities to amendments in a saline-alkaline environment

Yang

et al. 2020

PLoS ONE

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The application of organic amendments to saline-alkaline soil has been recommended as an agricultural strategy to improve crop productivity and soil health. However, there has been limited research on how organic soil amendment strategies affect the health of oats and their associated rhizosphere fungal communities in saline-alkaline conditions. Thus, the objectives of this study were to understand the effects of oat cultivars with contrasting saline-alkaline tolerances and different amendments on plant morphologies, root exudates (soluble sugars and organic acids), and rhizosphere fungal communities in a saline-alkaline environment. Experiments were conducted on a saline-alkaline tolerant cultivar, Baiyan2, and a saline-alkaline sensitive cultivar, Caoyou1, under four different organic amendment strategies: 1. control (no amendment application), 2. bio-fertilizer application, 3. rotten straw application, and 4. a co-application of bio-fertilizer and rotten straw. Results showed that plant morphological characters of Baiyan2 were better than Caoyou1, and that soluble sugar and organic acid levels in the rhizosphere of Baiyan2 were significantly lower than Caoyou1. Compared to the control, oat root and plant development was significantly improved by the combined bio-fertilizer and rotten straw amendment. Bio-fertilizer application promoted malic and citric acid levels, contributing to a higher total organic acid level, and significantly increased the abundance of Rhizopus arrhizus and decreased the abundance of the fungal pathogens Alternaria, Cladosporium, Sarocladium and Heydenia of Ascomycota in both oat cultivars. All amendment treatments containing rotten straw, except the combined amendment in Baiyan2, significantly increased the relative abundance of Ascomycota (specifically Gibberella, Talaromyces, Fusarium, and Bipolaris) and decreased the relative abundance of R. arrhizus by reducing soluble sugar and organic acid levels. For the combined amendment in Baiyan2, there were no significant changes in Gibberella and Rhizopus between the control and amendment treatment. Our results suggest that co-application of bio-fertilizer and rotten straw, combined with a tolerant oat cultivar, is an effective method to increase crop productivity and enhance soil health in a saline-alkaline environment.

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“…Our current study revealed that a large proportion of differently expressed metabolizes were acids, implying the potential involvement of acids in plant protection. Acids can enhance plant stress resistance and stabilize intracellular pH [39]. We found that many acids were accumulated in the aboveground part of S. salsa.…”

Section: Discussionmentioning

confidence: 83%

Metabolic Differences Between Suaeda Salsa and Puccinellia Tenuiflora Under Saline-alkali Stress

Chen

Huansong

Wei

et al. 2021

Preprint

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Background: Salinization of soil is an urgent problem that restricts agroforestry production and environment protection. Substantial accumulation of metal ion or high alkaline alters plant metabolites and may even cause plant death. In order to explore the differences in the response strategies between Suaeda salsa (S. salsa) and Puccinellia tenuiflora (P. tenuiflora), two main constructive species that survive in saline-alkali soil, their metabolic differences were characterized.Result: Metabolomics was conducted to study the role of metabolic differences between S. salsa and P. tenuiflora under saline-alkali stress. A total of 68 significantly different metabolites were identified by GC-MS, including 9 sugars, 13 amino acids, 8 alcohols, and 34 acids. A more detailed analysis indicated that P. tenuiflora utilizes sugars more effectively and may be salt-alkali tolerant via sugar consumption while S. salsa mainly utilizes amino acids, alcohols, and acids to resist salt-alkali stress. Measurement of phenolic compounds showed that more C6C3C6-compounds were accumulated in P. tenuiflora while more C6C1-compounds, phenolic compounds that can be used to defense stress as signaling molecules, were accumulated in S. salsa.Conclusion: Our observations suggest that S. salsa resists the toxicity of saline-alkali stress using aboveground organs and P. tenuiflora eliminates the poison of saline-alkali via roots. S. salsa has a stronger ability of habitat transformation and can provide better habitat for other plants.

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Effects of alkaline stress on organic acid metabolism in roots of grape hybrid rootstocks

Cited by 37 publications

References 14 publications

Response Mechanisms of Plants Under Saline-Alkali Stress

Response Mechanisms of Plants Under Saline-Alkali Stress

Response of oat morphologies, root exudates, and rhizosphere fungal communities to amendments in a saline-alkaline environment

Metabolic Differences Between Suaeda Salsa and Puccinellia Tenuiflora Under Saline-alkali Stress

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