The success of an invasive Poaceae explained by drought resilience but not by higher competitive ability

Leal, Rodrigo Pedro; Silveira, Márcio José; Petsch, Danielle Katharine; Mormul, Roger Paulo; Thomaz, Sidinei Magela

doi:10.1016/j.envexpbot.2021.104717

Cited by 23 publications

(19 citation statements)

References 58 publications

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“…The magnitude of self-DNA inhibition observed in our experiment is also consistent with that previously observed at similar concentration levels for different plant species [ 1 , 4 , 18 ]. At the lowest concentration level (2 ng/µL), only the S. italica seedlings were significantly inhibited by self-DNA, thus providing support to the general hypothesis of a higher susceptibility of cultivated species, compared to invasive weeds, towards environmental stress factors [ 24 , 25 , 26 , 27 , 28 ]. Accordingly, S. pumila DNA at 10 ng/µL, besides inhibiting conspecific seedlings, also showed a marginal inhibitory effect on congeneric ( S. italica ) seedlings, although in this latter case, the treatment vs. control comparison produced a borderline p -value.…”

Section: Discussionsupporting

confidence: 54%

“…Duran-Flores and Heil [ 18 ] confirmed the species-specificity of self-DNA, showing that common bean ( Phaseolus vulgaris ) root growth was strongly inhibited by self-DNA, weakly inhibited by congeneric DNA ( Phaseolus lunatus ), but substantially unaffected by heterologous DNA from acacia ( Acacia farnesiana ), indicating that the species-specificity of the self-DNA effect still holds at the infrageneric level. Along this line, we tested the species-specificity of self-DNA inhibition in congeneric species with the novelty of investigating a cultivated ( Setaria italica ) and a weedy, invasive species ( Setaria pumila ), with the latter expected to be more resistant to environmental stressors [ 24 , 25 , 26 , 27 , 28 ]. In our cross-factorial experiment, the absence of detectable effects of S. salar DNA and a marginal effect of heterospecific DNA from B. napus on Setaria rootlets are fully consistent with the above-mentioned previous findings, confirming the absence of inhibition in the case of species exposed to DNA from phylogenetically distant species, while still showing a weak, marginal concentration-dependent inhibition exerted by heterologous plant DNA at a supra-familiar phylogenetic distance [ 1 , 4 , 18 ].…”

Section: Discussionmentioning

confidence: 99%

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Self-DNA Early Exposure in Cultivated and Weedy Setaria Triggers ROS Degradation Signaling Pathways and Root Growth Inhibition

Ronchi

Foscari

Zaina

et al. 2023

Plants

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The accumulation of fragmented extracellular DNA reduces conspecific seed germination and plantlet growth in a concentration-dependent manner. This self-DNA inhibition was repeatedly reported, but the underlying mechanisms are not fully clarified. We investigated the species-specificity of self-DNA inhibition in cultivated vs. weed congeneric species (respectively, Setaria italica and S. pumila) and carried out a targeted real-time qPCR analysis under the hypothesis that self-DNA elicits molecular pathways that are responsive to abiotic stressors. The results of a cross-factorial experiment on root elongation of seedlings exposed to self-DNA, congeneric DNA, and heterospecific DNA from Brassica napus and Salmon salar confirmed a significantly higher inhibition by self-DNA as compared to non-self-treatments, with the latter showing a magnitude of the effect consistent with the phylogenetic distance between the DNA source and the target species. Targeted gene expression analysis highlighted an early activation of genes involved in ROS degradation and management (FSD2, ALDH22A1, CSD3, MPK17), as well as deactivation of scaffolding molecules acting as negative regulators of stress signaling pathways (WD40-155). While being the first exploration of early response to self-DNA inhibition at molecular level on C4 model plants, our study highlights the need for further investigation of the relationships between DNA exposure and stress signaling pathways by discussing potential applications for species-specific weed control in agriculture.

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Section: Discussionsupporting

confidence: 54%

Section: Discussionmentioning

confidence: 99%

Self-DNA Early Exposure in Cultivated and Weedy Setaria Triggers ROS Degradation Signaling Pathways and Root Growth Inhibition

Ronchi

Foscari

Zaina

et al. 2023

Plants

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“…The current study highlighted that while the invasion success of I. cylindrica was significantly higher under drought and drought + N‐addition treatments in comparison to the control plots, the invasion success was marginally significant between the N‐addition and control plots. These results indicate that the invasive species I. cylindrica recovers from stressful conditions associated with drought more efficiently than the native one, which can be part of its resilience to drought (Leal et al, 2022 ), suggests that I. cylindrica has rapid phenotypic plasticity to adapt to new and heterogeneous habitats (Ni et al, 2021 ), in addition to its wide environmental tolerance (MacDonald, 2004 ) and high growth rate under different growing conditions (Ni et al, 2021 ). These findings suggest that if drought becomes more frequent, I. cylindrica is more likely to invade and impact grassland ecosystems.…”

Section: Discussionmentioning

confidence: 94%

“…Another major influence on the natural ecosystem which is increasing with the ongoing global change is the occurrence of invasive species (Bradley et al, 2012 ; Seebens et al, 2015 ). The decrease in ecosystem structure and function through drought events facilitated plant invasion success (Davis et al, 2000 ; Duell et al, 2021 ; Leal et al, 2022 ). For example, during drought events, the biomass production of native species is often reduced, whereas invasive species show high growth rates, especially in nutrient‐poor soils (Pellegrini et al, 2021 ; Sardans et al, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Effect of drought and nutrient availability on invaded plant communities in a semi‐arid ecosystem

Ali

Bucher

2022

Ecology and Evolution

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Ecosystem functions are heavily dependent on the functional composition of the plant community, i.e., the functional traits of plants forming the community. This, on the one hand, depends on plant occurrence, but on the other hand, depends on the intraspecific variability of functional traits of the species, which are influenced by climate and nutrient availability and affected by plant–plant interactions. To illustrate that, we studied the effects of drought and nitrogen addition (+ N), two important abiotic variables which are changing with ongoing global change, as well as their combined effect on the functional responses of grassland communities in semi‐arid environments of Northern Africa comprising of natural and invasive species. We conducted an experiment where we planted three native species and one invasive plant species in artificial communities of five individuals per species per plot. We exposed these communities to four different treatments: a drought treatment, an N‐addition treatment, the combination between drought and N‐addition, as well as a control. To assess the performance of plants within treatments, we measured selected plant functional traits (plant height, specific leaf area [SLA], leaf dry matter content [LDMC], N content of the leaves [Nmass], specific root length [SRL], and root diameter) for all individuals occurring in our plots, and additionally assessed the above and belowground biomass for each plant individual. We found that the invasive species showed a higher performance (higher biomass accumulation, taller plants, higher SLA, Nmass, SRL, and root diameter as well as lower LDMC) than the native species under drought conditions. The invasive species was especially successful with the combined impact of drought + N, which is a likely scenario in ongoing global change for our research area. Thus, plant functional traits might be a key factor for the invasion success of plant species which will be even more pronounced under ongoing global change.

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“…They directly affect native plant communities by causing biodiversity loss, ecosystem change, and reduction in ecosystem services (Wardle et al 2011;Barros et al 2020). Previous studies showed that the success of these species depends on several abiotic and biotic factors (Martin and Coetzee 2014;Leal et al 2022) as well as on biological traits related to their ability to spread such as copious seed production, high germination, survival rates, efficient dispersal and good competitive ability (Wickert et al 2017;Yu et al 2018;El-Barougy et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Assessing the competitive ability of the invader Senna obtusifolia with coexisting natives species under different water stress regimes

et al. 2022

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Invasive species tend to pose a threat to ecosystem biodiversity, functioning, and ecosystem service provision. This study was conducted in Burkina Faso to assess the competitiveness of an invasive species Senna obtusifolia that is a less palatable legume plant in West African Sahelian rangelands. To address the research hypothesis that the recurrent drought in the Sahel results in S. obtusifolia being more competitive in the land invasion, we conducted an interspecific competition involving S. obtusifolia and 3 herbaceous species (Andropogon gayanus, Chamaecrista mimosoides, and Pennisetum pedicellatum) in a greenhouse experiment under four water stress regimes using a replacement series design. The height and biomass of each species were measured throughout four months experiment. In the severe water regime, S. obtusifolia was the most sensitive to water deficit while the 3 other species were found to be resistant. In addition, in all water regimes, the aggressivity index revealed that S. obtusifolia was less competitive than the grass species A. gayanus and P. pedicellatum. Further, the study discovered that drought in the Sahel made S. obtusifolia more vulnerable than the other species. Hence the invasion of Sahelian rangelands by S. obtusifolia could be favored by overgrazing that reduces fodder species' dominance and competitiveness. Good management of sahelian rangelands by controlling grazing could help to reduce S. obtusifolia invasion and provide more fodder for livestock.

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The success of an invasive Poaceae explained by drought resilience but not by higher competitive ability

Cited by 23 publications

References 58 publications

Self-DNA Early Exposure in Cultivated and Weedy Setaria Triggers ROS Degradation Signaling Pathways and Root Growth Inhibition

Self-DNA Early Exposure in Cultivated and Weedy Setaria Triggers ROS Degradation Signaling Pathways and Root Growth Inhibition

Effect of drought and nutrient availability on invaded plant communities in a semi‐arid ecosystem

Assessing the competitive ability of the invader Senna obtusifolia with coexisting natives species under different water stress regimes

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