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<p>Flooding alters nutrient uptake by plants, but less is known about its effects after the stress period. The aim of this work was to analyze the effects of flooding depth on N and P concentrations in leaves, stems and roots of young willows during flooding and in the post-flooding recovery period. Two commercial willow genotypes (<i>Salix matsudana x S. alba</i>) named Agronales (abbreviated clone A) and Carapachay (clone C) were grown in pots in a greenhouse. Two experiments were performed: (1) Plants under control (non-flooded) conditions vs. plants under partial submergence (50% of the stem covered by water); (2) Plants under non-flooded conditions vs. plants under total submergence. Nutrient concentration and growth were analyzed after 21 days of flooding and 28 days of post-flooding recovery. Under total submergence, willows showed a quiescence response, while in the partial submergence experiment there was active acclimation by developing hypertrophied lenticels and adventitious roots that allowed growth to continue. Clone C was able to maintain the N and P concentrations more stable under flooding conditions than clone A. Clone A significantly increased N: P ratio of leaves under partial submergence conditions in the post-flooding period, while clone C did not. This genotypic variation opens the possibility to explore the longer-term consequences of these changes in the growth and nutrient homeostasis of willow plantations.</p>

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Effects of water submergence depth on nitrogen and phosphorus accumulation and partitioning in young willow plants during flooding and post-stress recovery

  • 期刊论文

  • 发表日期：

    2025年10月4日

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  • Irina Mozo,
  • Melisa Luquet,
  • Virginia M. C. Luquez

摘要

Flooding alters nutrient uptake by plants, but less is known about its effects after the stress period. The aim of this work was to analyze the effects of flooding depth on N and P concentrations in leaves, stems and roots of young willows during flooding and in the post-flooding recovery period. Two commercial willow genotypes (Salix matsudana x S. alba) named Agronales (abbreviated clone A) and Carapachay (clone C) were grown in pots in a greenhouse. Two experiments were performed: (1) Plants under control (non-flooded) conditions vs. plants under partial submergence (50% of the stem covered by water); (2) Plants under non-flooded conditions vs. plants under total submergence. Nutrient concentration and growth were analyzed after 21 days of flooding and 28 days of post-flooding recovery. Under total submergence, willows showed a quiescence response, while in the partial submergence experiment there was active acclimation by developing hypertrophied lenticels and adventitious roots that allowed growth to continue. Clone C was able to maintain the N and P concentrations more stable under flooding conditions than clone A. Clone A significantly increased N: P ratio of leaves under partial submergence conditions in the post-flooding period, while clone C did not. This genotypic variation opens the possibility to explore the longer-term consequences of these changes in the growth and nutrient homeostasis of willow plantations.