Water Use Characteristics of Two Dominant Species in the Mega-Dunes of the Badain Jaran Desert

Qin, Jie; Si, Jing; Jia, Baoping; Zhao, Chunyan; Zhou, Dongmeng; He, Xiuping; Wang, Chunlin; Zhu, Xinglin

doi:10.3390/w14010053

Cited by 5 publications

(6 citation statements)

References 42 publications

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“…Despite the harsh conditions, desert ecosystems often comprise multizonal vegetation, and species that have typical characteristic of adaptation to drought, which is the main property determining desert productivity [ 9 , 27 ]. Among these species, Artemisia ordosica is one of the most dominant subshrubs and is distributed widely in the sandy areas of northwest China, such as Inner Mongolia, Ningxia, Shaanxi, Gansu, and other provinces [ 28 , 29 , 30 ]. Artemisia ordosica can adapt well to water stress conditions and has developed the typical morphological and physiological characteristics of adaptation to drought and sand burial [ 29 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

Improved Tolerance of Artemisia ordosica to Drought Stress via Dark Septate Endophyte (DSE) Symbiosis

Zhang

et al. 2022

JoF

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Dark septate endophytes (DSEs) usually colonize plant roots, especially in stress environments. However, their relationship with plants ranges from beneficial to harmful and has remained largely uncharacterized. In the present study, 14 DSE species grouped into 11 genera were isolated from the roots of a desert plant, Artemisia ordosica, which is widely distributed in northwest China. Three dominant DSE species—Paraphoma chrysanthemicola (Pc), Alternaria chartarum (Ac), and Acrocalymma vagum (Av)—were selected and tested for their resistance to drought in vitro. Furthermore, we characterized the responses of A. ordosica under drought conditions in relation to the presence of these DSEs following inoculation. The results showed that all three strains grew well under in vitro drought stress, and the biomass of Ac and Av was significantly higher than that of the unstressed control. The effects of DSE inoculation on the growth of A. ordosica under drought stress varied according to the different DSE species but were generally beneficial. Under drought stress, Av and Pc promoted plant growth, antioxidant enzyme activity, and root development of the hosts. The Ac strain conferred obvious positive effects on the antioxidant enzyme activity of the hosts. In general, Av and Pc demonstrated better application potential for improving the drought resistance of A. ordosica.

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Section: Introductionmentioning

confidence: 99%

Improved Tolerance of Artemisia ordosica to Drought Stress via Dark Septate Endophyte (DSE) Symbiosis

Zhang

et al. 2022

JoF

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“…In this scenario, deep soil water absorbed by the roots of Z. xanthoxylum is released into the upper soil layers, wherein it can be utilized by the shallow branching roots of F. bungeana . In addition, Artemisia ordosica , which grows in the same dune habitat, utilizes soil water at depths down to 120 cm ( Qin et al., 2022 ), thereby to a certain extent, drawing upon the water sources of F. bungeana . Consequently, there may exist a certain degree of competition between F. bungeana and A. ordosica for limited resources.…”

Section: Discussionmentioning

confidence: 99%

“…Comparatively, deeper soil is influenced to a far lesser extent by environmental factors, and consequently, the levels of soil moisture in these deeper layers tend to be higher and less prone to fluctuate than those in shallower soils ( Wang et al., 2017 ). From the perspective of the water potential gradient, we determined that water in the wet sand layers of mega-dunes is derived from groundwater, which migrates upward by evaporation as a thin film of water ( Chen et al., 2004 ; Chen et al., 2014 ), thereby leading to a greater isotopic enrichment of the surface soil water ( Qin et al., 2022 ). This process tends to run counter to the idea that local precipitation can infiltrate through mega-dunes to recharge lakes or groundwater ( Zhao et al., 2011 ; Ma et al., 2016 ).…”

Section: Discussionmentioning

confidence: 99%

Water use strategies of Ferula bungeana on mega-dunes in the Badain Jaran Desert

Qin

Si²,

Jia³

et al. 2022

Front. Plant Sci.

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In desert ecosystems, ephemeral plants have developed specialized water use strategies in response to long-term natural water stress. To examine the water use strategies of desert ephemeral plants under natural extreme drought conditions, we investigated the water absorption sources, water potential, hydraulic conductivity, and water use efficiency of Ferula bungeana at different elevations on the slopes of mega-dunes in the Badain Jaran Desert, Inner Mongolia, during a period of extreme drought. We found that the water utilized by F. bungeana was mostly absorbed from the 0–60 cm soil layers (80.47 ± 4.28%). With progression of the growing season, the source of water changed from the 0–30 cm soil layer to the 30-60 cm layer. The water potentials of the leaves, stems, and roots of F. bungeana were found to be characterized by clear diurnal and monthly variation, which were restricted by water availability and the hydraulic conductivity of different parts of the plant. The root hydraulic conductivity of F. bungeana was found to be considerably greater than that of the canopy, both of which showed significant diurnal and monthly variation. The water use efficiency of F. bungeana under extreme drought conditions was relatively high, particularly during the early and late stages of the growing season. Variations in water availability led to the regulation of water uptake and an adjustment of internal water conduction, which modified plant water use efficiency. These observations tend to indicate that the water use strategies of F. bungeana are mainly associated with the growth stage of plants, whereas the distribution pattern of plants on mega-dunes appeared to have comparatively little influence. Our findings on the water use of ephemeral plants highlight the adaptive mechanisms of these plants in desert habitats and provide a theoretical basis for selecting plants suitable for the restoration and reconstruction of desert ecosystems.

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“…In the context of dominant natural species' response to soil water dynamics in extreme dry shifting desert regions, Qin et al [7] compared the differences in the water use characteristics between two dominant species of the Badain Jaran Desert mega-dunes-Zygophyllum xanthoxylum and Artemisia ordosica-by investigating 2 H and 18 O in plant xylem and soil water and 13 C in plant leaves. The results confirmed that the differences in water use between the two studied species were mainly related to their root distribution characteristics.…”

Section: Summary Of the Special Issuementioning

confidence: 99%

Special Issue: Soil Hydrological Processes in Desert Regions: Soil Water Dynamics, Driving Factors, and Practices

Zhao

Zhang

et al. 2022

Water

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Water Use Characteristics of Two Dominant Species in the Mega-Dunes of the Badain Jaran Desert

Cited by 5 publications

References 42 publications

Improved Tolerance of Artemisia ordosica to Drought Stress via Dark Septate Endophyte (DSE) Symbiosis

Improved Tolerance of Artemisia ordosica to Drought Stress via Dark Septate Endophyte (DSE) Symbiosis

Water use strategies of Ferula bungeana on mega-dunes in the Badain Jaran Desert

Special Issue: Soil Hydrological Processes in Desert Regions: Soil Water Dynamics, Driving Factors, and Practices

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