Seedling adaptive characteristics of Phragmites australis to nutrient heterogeneity under salt stress using a split-root approach

Guan, Bo; Gao, Nan; Chen, Min; Cagle, Grace A.; Hou, Aixin; Tian, Xiaohong

doi:10.1007/s00027-021-00811-w

Cited by 7 publications

(5 citation statements)

References 44 publications

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“…For seedlings, increasing salinity resulted in decreased growth rate, but the growth of rhizome-derived plants was optimum at 5 g L −1 salinity. Moreover, high soil nutrient heterogeneity can increase the negative effect of salinity on plant growth, as found in the study under controlled conditions [216]. In another study, 1.5 g L −1 NaCl did not result in growth inhibition, but all plants died at 35 g L −1 salinity [217].…”

Section: Phargmites Australismentioning

confidence: 62%

Halophytic Clonal Plant Species: Important Functional Aspects for Existence in Heterogeneous Saline Habitats

Ievinsh

2023

Plants

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Plant modularity-related traits are important ecological determinants of vegetation composition, dynamics, and resilience. While simple changes in plant biomass resulting from salt treatments are usually considered a sufficient indicator for resistance vs. susceptibility to salinity, plants with a clonal growth pattern show complex responses to changes in environmental conditions. Due to physiological integration, clonal plants often have adaptive advantages in highly heterogeneous or disturbed habitats. Although halophytes native to various heterogeneous habitats have been extensively studied, no special attention has been paid to the peculiarities of salt tolerance mechanisms of clonal halophytes. Therefore, the aim of the present review is to identify probable and possible halophytic plant species belonging to different types of clonal growth and to analyze available scientific information on responses to salinity in these species. Examples, including halophytes with different types of clonal growth, will be analyzed, such as based on differences in the degree of physiological integration, ramet persistence, rate of clonal expansion, salinity-induced clonality, etc.

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Section: Phargmites Australismentioning

confidence: 62%

Halophytic Clonal Plant Species: Important Functional Aspects for Existence in Heterogeneous Saline Habitats

Ievinsh

2023

Plants

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“…Although more research is needed to identify what limits native species plasticity, one possible explanation is that native P. australis need to limit unsustainable phenotypic responses to maintain resistance to some other abiotic and biotic stresses (Power et al., 2019; Valladares et al., 2007), such as salt pressure and predation pressure from native herbivores. For example, salt pressure was found to constrain the growth plasticity of native P. australis in response to N heterogeneity (Guan et al., 2021). Moreover, under herbivory pressure, native plant species should maintain a stable anti‐herbivore defence with low trait plasticity in response to variation in soil nutrient availability (Dawson et al., 2004; Shan et al., 2022).…”

Section: Discussionmentioning

confidence: 99%

Root plasticity benefits a global invasive species in eutrophic coastal wetlands

Liu,

Zhang,

et al. 2023

Functional Ecology

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Invasive species usually benefit more than native species from increases in nutrient availability. Phenotypic plasticity in above‐ground traits has often been used to explain the superiority of invasive species in response to increased nutrient availability. However, it remains largely unclear whether and how root trait plasticity predicts the ascendancy of invasive plants following nutrient enrichment. Using a 3‐year field nitrogen (N) enrichment experiment, we evaluated the effect of N enrichment on the root traits and growth performance of a globally invasive cordgrass, Spartina alterniflora, and a co‐occurring native plant, Phragmites australis. We found that S. alterniflora exhibited high plasticity in root traits in response to N enrichment, whereas the root traits of P. australis largely remained unresponsive to fertilization. Specifically, in response to N enrichment, S. alterniflora decreased soil exploitation with a lower length ratio of lateral to adventitious roots. However, the root traits of S. alterniflora shifted to be more acquisitive under N enrichment with higher root N concentrations and lower root tissue density. Moreover, there were a series of anatomical adjustments in the adventitious roots of S. alterniflora in response to N enrichment, such as a thicker diameter, lower living cortex‐to‐stele ratio and higher xylem‐to‐root area ratio. These plastic adjustments in root traits jointly resulted in fast nutrient uptake and transportation in S. alterniflora, boosting its above‐ground productivity under fertile N conditions. Our study demonstrated that greater plasticity in root traits enables a globally successful invasive species to take advantages of increased nutrient availability, potentially increasing its invasiveness. We suggest that consideration of root traits can improve our understanding of below‐ground mechanisms underlying invasion under global nutrient enrichment. Read the free Plain Language Summary for this article on the Journal blog.

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“…Therefore, our study further improved the zonation method of a tidal flat on the basis of the principle of tidal correction [44], as shown in Figure 3. The specific steps of tidal correction in the coastal wetlands of the LRE are as follows: (1) our study calculated the tidal information at the scene center time of the RS images using the tide gauge data (see Table 1); the tide levels (h) of RS images received on 29 May 2021 and 20 October 2021 were 1.449 m and 1.265 m, respectively and the tide level difference (∆h) between the two images was 0.185 m. (2) The shoreline of the study area was divided into three sections due to the intricate terrains of the coastal wetlands in the LRE, as shown in Figure 4. Our study selected the instantaneous waterline (29 May 2021) as the baseline of the tide correction model, set the vertical line from the baseline to another instantaneous waterline every 300 m as the division line, and then calculated the average length of the division line in each shoreline to obtain the distance of two instantaneous waterlines in the same region (∆l).…”

Section: Tidal Flat Zonationmentioning

confidence: 99%

“…As the most vulnerable and economically important ecosystem in the world, coastal wetlands can provide sufficient nutrients and organic matter for marine animals and salt marsh plants living on a tidal flat, also playing a crucial role in ecological protection, biodiversity maintenance, flood prevention, and water purification [1][2][3]. One of the most active micro-geomorphology units of the tidal flat, tidal creeks are widely distributed in the coastal wetlands and connect to a bay or an estuary to transport nutrients, deliver sediments, and help in vegetation colonization and diffusion [4,5].…”

Section: Introductionmentioning

confidence: 99%

Morphological Characteristics and Hydrological Connectivity Evaluation of Tidal Creeks in Coastal Wetlands

Chen

Zhang

Jiang

2022

Land

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Tidal creeks play a critical role in delivering water, suspended sediments, and nutrients to coastal wetlands, so it is important to understand the characteristics of the tidal creek system to guide the development and sustainable utilization of coastal wetlands. Using the coastal wetlands of the Liao River Estuary (LRE) as a study area, this study accurately divided the tidal flat based on the principle of tidal correction, extracted the linear features of tidal creeks using high-resolution remote sensing (RS) data, and then classified the tidal creeks on a tidal flat using the tidal creek ordering algorithm. Our study aimed to quantify the morphological characteristics of tidal creeks and qualitatively evaluate the parameters of the tidal creek network in the study area. The study results show obvious spatial heterogeneity in the order and the average length of tidal creeks in the coastal wetlands of the LRE. With the increase in the order of tidal creeks, the average length of tidal creeks increased exponentially and the number of tidal creeks decreased exponentially in the study area. The total density of tidal creeks was related to the beach surface elevation gradient, and the density and frequency of tidal creeks reduced substantially with an increase in the order of tidal creeks. The sinuosity ratio of tidal creeks declined sharply with a fall in the beach surface elevation gradient. The average bifurcation ratio of tidal creeks in the upper intertidal zone was higher than that in other zones, indicating that the tidal creeks in the upper intertidal zone were erratic. In addition, the hydrological connectivity of the tidal creek network in the upper intertidal zone and the development of the tidal creek system in the supratidal zone were the highest in the LRE. The study results help understand the spatial variations in tidal creek morphology under the influence of tidal hydrodynamics.

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Seedling adaptive characteristics of Phragmites australis to nutrient heterogeneity under salt stress using a split-root approach

Cited by 7 publications

References 44 publications

Halophytic Clonal Plant Species: Important Functional Aspects for Existence in Heterogeneous Saline Habitats

Halophytic Clonal Plant Species: Important Functional Aspects for Existence in Heterogeneous Saline Habitats

Root plasticity benefits a global invasive species in eutrophic coastal wetlands

Morphological Characteristics and Hydrological Connectivity Evaluation of Tidal Creeks in Coastal Wetlands

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