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... BACKGROUND AND AIMS: In anticipation of global climate change, the question of whether shifts in plant community composition (beta-diversity) are predictable from environmental variation is receiving considerable interest. Species strongly associated with local soil environments may be more vulnerable to climate change than species with a broad tolerance of soil conditions. Here we investigate rel ...
Filip Pošćić; Mirella Žanetić; Željka Fiket; Martina Furdek Turk; Nevenka Mikac; Niko Bačić; Mavro Lučić; Marija Romić; Helena Bakić; Maja Jukić Špika; Branimir Urlić; Marko Runjić; Gabriela Vuletin Selak; Elda Vitanović; Tatjana Klepo; Jakša Rošin; Zed Rengel; Slavko Perica
... AIMS: A potential of rare earth elements (including yttrium) (REY) accumulation in olives is increasing due to enhanced use of REY in human activities. REY transfer to extra virgin olive oil (EVOO) is little studied, and characterising the relationships between soil properties and REY concentrations in olive leaves, pomace and EVOO can enhance our understanding of soil-plant interactions. METHODS: ...
... Variations in genotype rankings among screenings for Al tolerance in hydroponics may be related to differences in the composition of the solutions. In the present study, we investigated the involvement of Mg ions in modifying Al rhizotoxicity in soybeans. Root elongation was strongly inhibited by Al in a simple, 800 micromolars CaSO4 solution, but elongation increased noticeably when the solutions ...
... BACKGROUND: Most studies focus on macronutrient of C, N and P and ignore other elements, which restrict our understanding on the strategy of plant nutrient adaption and nutrient cycling. METHODS: We investigated 14 element (C, N, P, S, K, Ca, Mg, Fe, Mn, Zn, Cu, Na, Al, and Ba) concentrations of green and senesced leaves in Quercus variabilis along the altitude in the Baotianman Mountains, China, ...
... BACKGROUND AND AIMS: Tea is a strong accumulator of both aluminium (Al) and fluoride (F). We tested the hypothesis that Al helps detoxify F in tea plants by forming Al-F complexes. METHODS: Tea plants were grown hydroponically with a range of Al and F concentrations and in a soil pot experiment with amendments of NaF and acids. Growth and the uptake of F and Al were determined. Chemical species of ...
... AIM: Highly alkaline soils (pH > 9.0) may adversely affect agricultural crop productivity. Problems encountered include poor structure and nutrient deficiency. Research based on solution cultures suggests that aluminium (Al) phytotoxicity may occur in soils with pH > 9.0, but little research has been undertaken on actual soils under controlled conditions. The nature of the Al species responsible a ...
... To elucidate the mechanism of the high aluminum (Al) resistance of a Myrtaceae tree, Melaleuca cajuputi Powell, we investigated the responses of root tips to Al and compared them with those of an Al-sensitive species, M. bracteata F. Muell. Roots of seedlings of both species were treated with a calcium solution (pH 4.0) containing 0 or 1 mM AlCl₃. After 3 h of Al treatment, inhibition of root elon ...
... AIMS: The aims of this work were to investigate the aluminum (Al) and phosphate (P) interactions in the regulation of root system architecture of Arabidopsis thaliana seedlings and the contribution of auxin signaling in primary and lateral root growth in response to Al toxicity. METHODS: Detailed analyses of root system architecture and cell division were performed in Arabidopsis WT seedlings and ...
... BACKGROUND AND AIMS: Enhanced aluminum (Al) resistance has been observed in dicots over-expressing enzymes involved in organic acid synthesis; however, this approach for improving Al resistance has not been investigated in monocots. Among the cereals, oat (Avena sativa L.) is considered to be Al resistant, but the basis of resistance is not known. METHODS: A hydroponic assay and hematoxylin staini ...
... AIMS: Aluminum-tolerant wheat plants often produce more root exudates such as malate and phosphate than aluminum-sensitive ones under aluminum (Al) stress, which provides environmental differences for microorganism growth in their rhizosphere soils. This study investigated whether soil bacterial community composition and abundance can be affected by wheat plants with different Al tolerance. METHOD ...
... AIMS: We determined the reasons why in nutrient solution increasing Al concentrations >300 μ M inhibited shoot biomass production of Cedrela odorata L., Heliocarpus americanus L., and Tabebuia chrysantha (Jacq.) G. Nicholson while 300 μ M Al stimulated root biomass production of Tabebuia chrysantha. METHODS: Nutrient concentrations in plant tissue after a hydroponic growth experiment were determin ...
... AIMS: In acid tropical forest soils (pH <5.5) increased mobility of aluminum might limit aboveground productivity. Therefore, we evaluated Al phytotoxicity of three native tree species of tropical montane forests in southern Ecuador. METHODS: An hydroponic dose-response experiment was conducted. Seedlings of Cedrela odorata L., Heliocarpus americanus L., and Tabebuia chrysantha (Jacq.) G. Nicholso ...
... AIMS: Cerrado woody species are divided into a small group of aluminum (Al)-accumulating species and the rest of the woody species. Both groups grow well on acidic and Al-rich soils. We found a Cerrado remnant growing on a calcareous soil with high calcium (Ca) and low Al saturations (m%). We checked whether Al deposition differs between leaf veins and leaf blade, and predicted that plants grown o ...
... The effects of AlCl₃ on growth and polyamine levels of rice roots were investigated. When rice roots were treated with AlCl₃, root growth was markedly inhibited. AlCl₃ treatment resulted in a higher putrescine content and lower spermidine and spermine contents in rice roots. d-Argnine and α-methylornithine, inhibitors of putrescine biosynthesis, caused a reduced content of putrescine in rice roots ...
... Decreases in nutrient availability after loss of soil-water saturation are significant constraints to productivity in lowland rainfed rice soils. The effectiveness of soil amendments like lime and straw in ameliorating these constraints are poorly understood. This pot experiment was conducted in Cambodia to investigate changes in soil chemical properties and nutrient uptake by rice after applying ...
... Al stress and ammonium-nitrogen nutrition often coexist in acidic soils due to their low pH and weak nitrification ability. Rice is the most Al-resistant species among small grain cereal crops and prefers NH₄ ⁺ as its major inorganic nitrogen source. This study investigates the effects of NH₄ ⁺ and NO₃ ⁻ on Al toxicity and Al accumulation in rice, and thereby associates rice Al resistance with its ...
... BACKGROUND AND AIMS: Jasmonate (JA) and ethylene are involved in the regulation of the aluminum (Al)-induced growth inhibition. Although it has been reported that JA enhances Al-induced root-growth inhibition, its role in the regulation of growth interplaying with ethylene is still not well understood. In this study, we investigated the mechanism underlying the effect of apple MdMYC2 transcription ...
... AIMS: Aluminium toxicity in acidic soils adversely affects wheat growth. Foliar-applied magnesium (Mg) contributes to mitigating soil acidity stress in wheat, but the mechanisms are unknown. This study explored the mechanism of foliar-Mg mediated enhancement of wheat growth in acidic soil. METHODS: Two contrasting near-isogenic wheat (Triticum aestivum L.) genotypes differing in Al resistance (Al- ...