1. Towards a sustainable energy future : evaluating Arundo donax L. in continuous anaerobic digestion for biogas productionKarlo Špelić, Mario Panjicko, Gregor Drago Zupančič, Anamarija Lončar, Ivan Brandić, Ivana Tomić, Ana Matin, Tajana Krička, Vanja Jurišić, 2024, izvirni znanstveni članek Opis: Abstract
In response to the EU's REPowerEU initiative (COM (2022) 108) which encourages an increase in biogas production by 20% in member states by 2030 to boost energy independence, it has become essential to identify sustainable alternatives to traditional feedstocks for biogas production, especially in the EU Member states where there is still high dependence on corn silage as the main raw material in biogas plants. While corn silage, predominantly used in the European biogas plants today, serves primarily for the livestock sector, alternative sources need to be explored. Therefore, this study aimed to evaluate the potential of Arundo donax, a perennial energy crop, as an alternative feedstock in a continuous anaerobic process. The biogas yield and its quality, characterized by CH4, CO2, H2S and O2 content, were determined during a continuous process with A. donax, compared with two mixed feedstocks of A. donax and corn silage over a 5‐month period in a continuous anaerobic digestion process. The results revealed that A. donax exhibits a biogas yield and methane content comparable to corn silage, indicating its potential as a viable and sustainable alternative feedstock for biogas production.
Ključne besede: Arundo donax L., biogas quality, continuous anaerobic digestion, corn silage, perennial energy crops, sustainable biogas production
Objavljeno v RUNG: 18.03.2025; Ogledov: 160; Prenosov: 0
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2. Real-time monitoring of Arundo donax response to saline stress through the application of in vivo sensing technologyJanni Michela, Claudia Cocozza, Federico Brilli, Sara Pignattelli, Filippo Vurro, Nicola Coppede, Manuele Bettelli, Davide Calestani, Francesco Loreto, Andrea Zappettini, 2021, izvirni znanstveni članek Opis: One of the main impacts of climate change on agriculture production is the dramatic increase of saline (Na+) content in substrate, that will impair crop performance and productivity. Here we demonstrate how the application of smart technologies such as an in vivo sensor, termed bioristor, allows to continuously monitor in real-time the dynamic changes of ion concentration in the sap of Arundo donax L. (common name giant reed or giant cane), when exposed to a progressive salinity stress. Data collected in vivo by bioristor sensors inserted at two different heights into A. donax stems enabled us to detect the early phases of stress response upon increasing salinity. Indeed, the continuous time-series of data recorded by the bioristor returned a specific signal which correlated with Na+ content in leaves of Na-stressed plants, opening a new perspective for its application as a tool for in vivo plant phenotyping and selection of genotypes more suitable for the exploitation of saline soils.
Ključne besede: Arundo donax, saline stress, vivo sensing technology
Objavljeno v RUNG: 17.12.2021; Ogledov: 2937; Prenosov: 21
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3. The excess of phosphorus in soil reduces physiological performances over time but enhances prompt recovery of salt-stressed Arundo donax plantsClaudia Cocozza, Federico Brilli, Sara Pignattelli, Susanna Pollastri, Cecilia Brunetti, Cristina Gonnelli, Roberto Tognetti, Mauro Centritto, Francesco Loreto, 2020, izvirni znanstveni članek Opis: Arundo donax L. is an invasive grass species with high tolerance to a wide range of environmental stresses. The
response of potted A. donax plants to soil stress characterized by prolonged exposure (43 days) to salinity (+Na),
to high concentration of phosphorus (+P), and to the combination of high Na and P (+NaP) followed by 14 days
of recovery under optimal nutrient solution, was investigated along the entire time-course of the experiment.
After an exposure of 43 days, salinity induced a progressive decline in stomatal conductance that hampered A.
donax growth through diffusional limitations to photosynthesis and, when combined with high P, reduced the
electron transport rate. Isoprene emission from A. donax leaves was stimulated as Na+ concentration raised in
leaves. Prolonged growth in P-enriched substrate did not significantly affect A. donax performance, but decreased
isoprene emission from leaves. Prolonged exposure of A. donax to + NaP increased the leaf level of
H2O2, stimulated the production of carbohydrates, phenylpropanoids, zeaxanthin and increased the de-epoxidation
state of the xanthophylls. This might have resulted in a higher stress tolerance that allowed a fast and full
recovery following stress relief. Moreover, the high amount of ABA-glucose ester accumulated in leaves of A.
donax exposed to + NaP might have favored stomata re-opening further sustaining the observed prompt recovery
of photosynthesis. Therefore, prolonged exposure to high P exacerbated the negative effects of salt stress
in A. donax plants photosynthetic performances, but enhanced activation of physiological mechanisms that allowed
a prompt and full recovery after stress.
Ključne besede: Arundo donax
Phosphorus
Salinity
Stress tolerance
Biomass production
Objavljeno v RUNG: 20.04.2020; Ogledov: 4214; Prenosov: 0
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