Physiological Integration of Nutrients in Interconnected <i>Zoysia matrella</i> Ramets Grown under Heterogeneous Nutrient Conditions

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  • Sugiura Souichirou
    Department of Landscape Architecture, Graduate School of Agriculture, Tokyo University of Agriculture
  • Takahashi Shimpei
    Department of Landscape Architecture Science, Tokyo University of Agriculture

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  • Physiological Integration of Nutrients in Interconnected Zoysia matrella Ramets Grown under Heterogeneous Nutrient Conditions

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Abstract

<p>To better understand physiological integration of nutrients in interconnected ramets of Zoysia matrella (L.) Merr., the clonal stolon ramets were grown in three separate pots: basal (BR), intermediate (IR), and apical ramets (AR). Additionally, a stolon from the IR was grown without touching the soil (SNTS). Once ramets were well established, two experimental groups were set up, where stolons were kept connected to the other ramets (Intact), or were cut (Severed). Liquid fertilizer was applied to IR, and tap water to BR and AR, intermittently over a period of 49 days. In the results, the dry weights (DWs) of leaves and roots in Intact AR were significantly higher, 2.1 and 1.8 times, respectively, than those in Severed AR. Furthermore, SNTS DW of intact stolons was significantly higher (2.2 times) than that of severed ones. However, BR leaves, stolons, and roots DWs were not significantly different between those of severed and intact plants. We conclude that fertilization on interconnected Z. matrella ramets effectively increases the biomass (dry weight) of both the apical portions of ramets and newly developed stolons. This phenomenon is an important strategy to enhance the low-nutrient tolerance.</p>

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