Salt-alkali tolerance during germination and establishment of Leymus chinensis in the Songnen Grassland of China

Lin, Jixiang; Yu, Dawei; Shi, Yujie; Sheng, Houcai; Li, Cong; Wang, Yingnan; Mu, Chunsheng; Li, Xiaoyü

doi:10.1016/j.ecoleng.2016.07.011

Cited by 33 publications

(22 citation statements)

References 20 publications

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“…NaCl solution of 200 mM had no serious effects on germination and seedling growth of the two species. L. chinensis is usually treated as a salt tolerant species (Lin et al, ; Ma et al, ), and M. sativa was more tolerant to salt than L. chinensis at the germination and early seedling stages in our study. Other than their use in forage production, growing salt‐resistant forage species for 1 to 3 years could also result in sufficient amelioration in sodic soils (Qadir et al, ).…”

Section: Discussionsupporting

confidence: 57%

“…In our study, we used the legume species Medicago sativa and the grass Leymus chinensis , both of which are high quality forages with similar germination tolerance to salinity (Farissi, Bouizgaren, Faghire, Bargaz, & Ghoulam, ; Lin et al, ). L. chinensis is a moderately salt‐tolerant glycophytic grass, and the dominant species in natural communities in the Songnen grassland, where more than 90% the area is affected by increased salinity to varying degrees (Ma, Yang, Liang, & Ooi, ).…”

Section: Introductionmentioning

confidence: 99%

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Nitrogen addition can improve seedling establishment of N‐sensitive species in degraded saline soils

et al. 2018

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Salinization is an important cause of land degradation globally, and these soils are usually nutrient deficient, which inhibits plant establishment and growth. Medicago sativa and Leymus chinensis are important legume and grass forage species, respectively, in China and are frequently used in pasture establishment. We aimed to test whether nitrogen (N) addition can increase the salt tolerance of these two glycophytes and whether the two species inhibit each other at the germination and seedling emergence stages. M. sativa and L. chinensis seeds were germinated separately or together in 0‐, 100‐, and 200‐mM NaCl solutions with supplemental 0‐, 20‐, or 40‐mM N solutions. N addition increased germination percentage and rate, shoot length, and seedling N concentration under moderate NaCl conditions for L. chinensis but had no effect on Na+ concentrations. Conversely, N addition stimulated Na+ uptake in M. sativa, but it had little effect on germination parameters, with salt suppressing N uptake. The presence of M. sativa stimulated L. chinensis germination percentage in mixed treatments. Our results suggest that proper N application may aid establishment of N‐sensitive species L. chinensis in grass–legume mixtures in degraded saline soils, through both direct influence as a nutritional and/or osmotic resource and indirect effect by increasing salt sequestration by M. sativa. N application had little effect on establishment of the N‐fixing species M. sativa.

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Section: Discussionsupporting

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Nitrogen addition can improve seedling establishment of N‐sensitive species in degraded saline soils

et al. 2018

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“…In northeastern China, the most remarkable feature is that the soil consists mainly of alkaline salts (e.g., NaHCO 3 and Na 2 CO 3 ), and alkaline meadows cover more than 70% of the land area [4]. Previous studies have demonstrated that alkaline salt stress and neutral salt (e.g., NaCl and Na 2 SO 4 ) stress are actually two entirely different stress types [5][6][7]. Alkaline stress not only has the same inhibitory effects as saline stress but also has the unique influence of high pH, which inhibits ion uptake and disrupts the ionic balance of plant cells [8,9].…”

Section: Introductionmentioning

confidence: 99%

Metabolomics Analysis Reveals the Alkali Tolerance Mechanism in Puccinellia tenuiflora Plants Inoculated with Arbuscular Mycorrhizal Fungi

et al. 2020

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Soil alkalization is a major environmental threat that affects plant distribution and yield in northeastern China. Puccinellia tenuiflora is an alkali-tolerant grass species that is used for salt-alkali grassland restoration. However, little is known about the molecular mechanisms by which arbuscular mycorrhizal fungi (AMF) enhance P. tenuiflora responses to alkali stress. Here, metabolite profiling in P. tenuiflora seedlings with or without arbuscular mycorrhizal fungi (AMF) under alkali stress was conducted using liquid chromatography combined with time-of-flight mass spectrometry (LC/TOF-MS). The results showed that AMF colonization increased seedling biomass under alkali stress. In addition, principal component analysis (PCA) and orthogonal projections to latent structures discriminant analysis (OPLS-DA) demonstrated that non-AM and AM seedlings showed different responses under alkali stress. A heat map analysis showed that the levels of 88 metabolites were significantly changed in non-AM seedlings, but those of only 31 metabolites were significantly changed in AM seedlings. Moreover, the levels of a total of 62 metabolites were significantly changed in P. tenuiflora seedlings after AMF inoculation. The results suggested that AMF inoculation significantly increased amino acid, organic acid, flavonoid and sterol contents to improve osmotic adjustment and maintain cell membrane stability under alkali stress. P. tenuiflora seedlings after AMF inoculation produced more plant hormones (salicylic acid and abscisic acid) than the non-AM seedlings, probably to enhance the antioxidant system and facilitate ion balance under stress conditions. In conclusion, these findings provide new insights into the metabolic mechanisms of P. tenuiflora seedlings with arbuscular mycorrhizal fungi under alkali conditions and clarify the role of AM in the molecular regulation of this species under alkali stress.

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“…Previous researches have demonstrated that salt stress is caused by neutral salts, whereas alkaline stress is induced by alkaline salts [ 10 – 12 ]. By disrupting the ion homeostasis in plant cells, neutral salt stress leads to adverse osmotic conditions and damage caused by ions.…”

Section: Introductionmentioning

confidence: 99%

Ionomic and metabolic responses to neutral salt or alkaline salt stresses in maize (Zea mays L.) seedlings

et al. 2017

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BackgroundSoil salinity and alkalinity present a serious threat to global agriculture. However, most of the studies have focused on neutral salt stress, and the information on the metabolic responses of plants to alkaline salt stress is limited. This investigation aimed at determining the influence of neutral salt and alkaline salt stresses on the content of metal elements and metabolites in maize plant tissues, by using mixtures of various proportions of NaCl, NaHCO3, Na2SO4, and Na2CO3.ResultsWe found that alkaline salt stress suppressed more pronouncedly the photosynthesis and growth of maize plants than salinity stress. Under alkaline salt stress conditions, metal ions formed massive precipitates, which ultimately reduced plant nutrient availability. On the other hand, high neutral salt stress induced metabolic changes in the direction of gluconeogenesis leading to the enhanced formation of sugars as a reaction contributing to the mitigation of osmotic stress. Thus, the active synthesis of sugars in shoots was essential to the development of salt tolerance. However, the alkaline salt stress conditions characterized by elevated pH values suppressed substantially the levels of photosynthesis, N metabolism, glycolysis, and the production of sugars and amino acids.ConclusionsThese results indicate the presence of different defensive mechanisms responsible for the plant responses to neutral salt and alkaline salt stresses. In addition, the increased concentration of organic acids and enhanced metabolic energy might be potential major factors that can contribute to the maintenance intracellular ion balance in maize plants and counteract the negative effects of high pH under alkaline salt stress.

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Salt-alkali tolerance during germination and establishment of Leymus chinensis in the Songnen Grassland of China

Cited by 33 publications

References 20 publications

Nitrogen addition can improve seedling establishment of N‐sensitive species in degraded saline soils

Nitrogen addition can improve seedling establishment of N‐sensitive species in degraded saline soils

Metabolomics Analysis Reveals the Alkali Tolerance Mechanism in Puccinellia tenuiflora Plants Inoculated with Arbuscular Mycorrhizal Fungi

Ionomic and metabolic responses to neutral salt or alkaline salt stresses in maize (Zea mays L.) seedlings

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