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Allocation of Nutrients and Leaf Turnover Rate in Poplar under Ambient and Enriched Ozone Exposure and Soil Nutrient Manipulation.
Paoletti, Elena; Pagano, Mario; Zhang, Lu; Badea, Ovidiu; Hoshika, Yasutomo.
Afiliação
  • Paoletti E; IRET-CNR, Via Madonna del Piano 10, Sesto Fiorentino, 50019 Florence, Italy.
  • Pagano M; IRET-CNR, Via Madonna del Piano 10, Sesto Fiorentino, 50019 Florence, Italy.
  • Zhang L; College of Landscape and Architecture, Zhejiang A&F University, 666 Wusu Street, Hangzhou 311300, China.
  • Badea O; National Institute for Research and Development in Forestry 'Marin Dracea', 128, Eroilor Bvd., 077190 Voluntari, Romania.
  • Hoshika Y; Faculty of Silviculture and Forest Engineering, Transilvania University, 1, Ludwig van Beethoven Street, 500123 Brasov, Romania.
Biology (Basel) ; 13(4)2024 Mar 31.
Article em En | MEDLINE | ID: mdl-38666844
ABSTRACT
An excess of ozone (O3) is currently stressing plant ecosystems and may negatively affect the nutrient use of plants. Plants may modify leaf turnover rates and nutrient allocation at the organ level to counteract O3 damage. We investigated leaf turnover rate and allocation of primary (C, N, P, K) and secondary macronutrients (Ca, S, Mg) under various O3 treatments (ambient concentration, AA, with a daily hourly average of 35 ppb; 1.5 × AA; 2.0 × AA) and fertilization levels (N 0 and 80 kg N ha-1 y-1; P 0 and 80 kg N ha-1 y-1) in an O3-sensitive poplar clone (Oxford Populus maximowiczii Henry × P. berolinensis Dippel) in a Free-Air Controlled Exposure (FACE) experiment. The results indicated that both fertilization and O3 had a significant impact on the nutrient content. Specifically, fertilization and O3 increased foliar C and N contents (+5.8% and +34.2%, respectively) and root Ca and Mg contents (+46.3% and +70.2%, respectively). Plants are known to increase the content of certain elements to mitigate the damage caused by high levels of O3. The leaf turnover rate was accelerated as a result of increased O3 exposure, indicating that O3 plays a main role in influencing this physiological parameter. A PCA result showed that O3 fumigation affected the overall allocation of primary and secondary elements depending on the organ (leaves, stems, roots). As a conclusion, such different patterns of element allocation in plant leaves in response to elevated O3 levels can have significant ecological implications.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2024 Tipo de documento: Article