Research progress in nitrogen and phosphorus resorption from senesced leaves and the influence of ontogenetic and environmental factors

doi:10.11686/cyxb2017223

Abstract

Abstract: Nutrient resorption of a plant is a fundamental process in which the nutrients, i.e. nitrogen and phosphorus, in older tissues or organs are partly retranslocated into other vital parts before the tissues or organs senesce and fall. This process can retain nutrients within the plant that would otherwise be lost and enhance the nutrient use, thus reducing the dependence of a plant on soil nutrient availability. Resorption is an important strategy for adaption to adverse environments and for promotion of competitive ability. This review summarizes findings on the effects of environmental factors (i.e. soil fertility and water) and ontogenetic influences (i.e. growth stage and leaf lifespan) on nitrogen (N) and phosphorus (P) resorption from senesced leaves. Nutrient resorption varies among plant life forms or functional groups (e.g. N₂-fixing and non-N₂-fixing). Fertilizer application and irrigation can change nutrient availability in soils, influencing nutrient resorption. Plants sense and absorb nutrients differently at different growth stages, leading to ontogenetic changes in patterns of nutrient resorption. Resorption is not confined to leaves and may occur in other plant organs. In summary, nutrient resorption is influenced by multiple factors including ontogenetic and environmental signals. Improved knowledge about nutrient resorption may help understanding of how plants adapt to adverse environments and provide theoretical knowledge to support the development of more sustainable agricultural production practices.

Key words: nutrient resorption, genetic feature, environmental factor, regulation

LU Jiao-yun, DUAN Bing-hong, YANG Mei, YANG Han, YANG Hui-min. Research progress in nitrogen and phosphorus resorption from senesced leaves and the influence of ontogenetic and environmental factors[J]. Acta Prataculturae Sinica, 2018, 27(4): 178-188.

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