Drought stress triggers differential survival and functional trait responses in the establishment of <i>Arnica montana</i> seedlings

Stanik, Nils; Lampei, Christian; Rosenthal, Gert

doi:10.1111/plb.13306

Cited by 3 publications

(1 citation statement)

References 61 publications

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“…Large variations between provenances may be mainly due to the genotypes, as all the experiments were conducted under same environmental conditions and they received similar treatments. Furthermore, decreases in biomass were reported by many studies as a response of seedlings to drought (Ludewig et al, 2018;Stanik et al, 2021). Thus, in terms of biomass production, the best genotype was found from slightly dry zone and sensitive genotypes were observed in seedlings from moderately and severely dry zones.…”

Section: Water Regime Water Use Effi Ciency*1000mentioning

confidence: 88%

Water stress responses of Saba senegalensis provenances during the seedling stage

Diawara¹,

Savadogo²,

Ouédraogo³

et al. 2023

Bois for. trop.

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Saba senegalensis is a multi-purpose liana from sub-Saharan Africa that is under threat from over-exploitation of its fruits and from land degradation and erratic rainfall affecting its regeneration. This research aims to assess survival, growth and dry matter distribution in the responses to water regimes of S. senegalensis seedlings of nine provenances from slightly, moderately and severely dry zones in Burkina Faso. The study parameters were provenance, water regimes and duration of drought stress. A total of 567 seedlings (63 per provenance) were grown using a factorial design. Five months after germination, three water regimes were applied: high, medium and low soil water content, corresponding respectively to 100, 75 and 50% of soil pot capacity. The experiments lasted for 6, 9 and 12 months after water stress began. Survival rates, growth parameters, biomass production, stress tolerance and stress sensitivity indexes were calculated and the data analyzed using a linear mixed model. Drought stress reduced seedling survival and biomass production, while the relative growth rate in collar diameter increased. Concerning the duration of drought stress, the relative growth rate of seedlings in collar diameter decreased and the shoot-to-root ratio increased. After six months under stress, the seedlings had invested more in roots, whereas after nine and twelve months the reverse trend was observed. Furthermore, seedlings from the slightly dry zone produced more biomass when watered under a low soil water content regime, and were more drought-tolerant than those from severely and moderately dry zones. This could indicate that the seedlings originating from these zones are well adapted to growth under severe water stress. For S. senegalensis domestication programs, seedlings originating from the slightly dry zones can be successfully propagated in agroforestry systems where water is a limiting factor.

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Section: Water Regime Water Use Effi Ciency*1000mentioning

confidence: 88%

Water stress responses of Saba senegalensis provenances during the seedling stage

Diawara¹,

Savadogo²,

Ouédraogo³

et al. 2023

Bois for. trop.

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Disturbance and biomass removal enhance population reinforcement of a plant species of European conservation concern

Streitberger

Borgmann

Drung

et al. 2022

Plant Ecology & Diversity

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Characterizing Root Morphological Traits in 65 Genotypes of Foxtail Millet (Setaria italica L.) from Four Different Ecological Regions in China

et al. 2022

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As an indispensable grain crop, foxtail millet (Setaria italica L.) is becoming a functional food in China because of its abundant nutrients. However, low rainfall and uneven precipitation limit its growth and production, especially in northwest China. Understanding the root phenotypic characteristics of foxtail millet is critical for utilizing its root characteristics to breed new millet varieties with improved resource-use efficiency and better adaptation to harsh environments. The present study characterized the variability of the root morphological traits at the seedling stage of 65 millet genotypes selected from four ecological regions across seven provinces in China. The plants were assessed after 21 days of growth in the germination pouches, and 48 root and shoot traits were measured. The results showed a large variation among the genotypes in the growth and functional traits. Among the measured traits, root dry mass, maximal root length, root surface area, and root tissue density contributed the most to the principal components. Root surface area ratio and root volume ratio were significantly correlated with root length ratio, respectively, while root length density and root weight density were negatively correlated with root diameter (p < 0.01). Shoot dry mass, root number, root length, root dry mass, and total dry mass were closely correlated with each other. Root length and root surface area in each 5-cm sections decreased from the top to the bottom along the root system. Among the four ecological regions, genotypes from the early maturing area of northwest China had the greatest root length, shoot dry mass, root dry mass, and root density, while those from the early maturing area of northwest China generally had the largest root system, with about 2.2 times more root length and dry weight than those from the early maturing area of northeast China (the shortest root system). The genotypic variability in root traits and correlations among shoot and root traits form a basis for breeding new millet cultivars.

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Drought stress triggers differential survival and functional trait responses in the establishment of Arnica montana seedlings

Abstract: unster, M€ unster, GermanyOpen access funding enabled and organized by ProjektDEAL.

Cited by 3 publications

References 61 publications

Water stress responses of Saba senegalensis provenances during the seedling stage

Water stress responses of Saba senegalensis provenances during the seedling stage

Disturbance and biomass removal enhance population reinforcement of a plant species of European conservation concern

Characterizing Root Morphological Traits in 65 Genotypes of Foxtail Millet (Setaria italica L.) from Four Different Ecological Regions in China

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