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Article Dans Une Revue Plant and Soil Année : 2020

Specific root respiration of three plant species as influenced by storage time and conditions

Respiration racinaire spécifique de trois espèces végétales influencée par la durée et les conditions de stockage

Résumé

Aims: Specific root respiration (RRS) is a key root trait, determining i.e. nutrient foraging and uptake efficiencies. However, a considerable uncertainty exists regarding the effects of storage time and conditions on RRS measurements. Methods: Fine root CO2 efflux rates of three plant types (tree seedling Carpinus betulus, legume Pisum sativum, grass Lolium perenne) were measured as depending on storage time (30–1440 min post-rinsing) and conditions (i.e. attached to plant, warm and cold water storage, and storage under dry conditions). Results: Short-term storage conditions (30 min) had a significant effect on measured RRS rates, in specific, RRS rates of all three species were significantly lower under dry storage. Irrespective of plant species or temperature, storage of excised roots in water did not affect RRS for 300 min,. RRS measurements remained stable for 1 day if roots were stored cold. Conclusions: Our results have important implications on measurement routines of RRS—a generally understudied root trait. Henceforth it seems reasonable to collect roots in the field and transport them, hydrated but even uncooled, to the laboratory for subsequent measurements for at least 300 min post-rinsing. Introduction

Domaines

Botanique
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Origine : Publication financée par une institution

Dates et versions

hal-02919400 , version 1 (27-04-2022)

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Zana Lak, Hans Sandén, Mathias Mayer, Boris Rewald. Specific root respiration of three plant species as influenced by storage time and conditions. Plant and Soil, 2020, 453 (1-2), pp.615-626. ⟨10.1007/s11104-020-04619-9⟩. ⟨hal-02919400⟩
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