Dataset Information

Species-Specific and Distance-Dependent Dispersive Behaviour of Forisomes in Different Legume Species.

ABSTRACT: Forisomes are giant fusiform protein complexes composed of sieve element occlusion (SEO) protein monomers, exclusively found in sieve elements (SEs) of legumes. Forisomes block the phloem mass flow by a Ca²⁺-induced conformational change (swelling and rounding). We studied the forisome reactivity in four different legume species-Medicago sativa, Pisum sativum, Trifolium pratense and Vicia faba. Depending on the species, we found direct relationships between SE diameter, forisome surface area and distance from the leaf tip, all indicative of a developmentally tuned regulation of SE diameter and forisome size. Heat-induced forisome dispersion occurred later with increasing distance from the stimulus site. T. pratense and V. faba dispersion occurred faster for forisomes with a smaller surface area. Near the stimulus site, electro potential waves (EPWs)-overlapping action (APs), and variation potentials (VPs)-were linked with high full-dispersion rates of forisomes. Distance-associated reduction of forisome reactivity was assigned to the disintegration of EPWs into APs, VPs and system potentials (SPs). Overall, APs and SPs alone were unable to induce forisome dispersion and only VPs above a critical threshold were capable of inducing forisome reactions.

SUBMITTER: Paulmann MK

PROVIDER: S-EPMC7825422 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature

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Publications

Species-Specific and Distance-Dependent Dispersive Behaviour of Forisomes in Different Legume Species.

Paulmann Maria K MK Zimmermann Matthias R MR Wegner Linus L van Bel Aart J E AJE Kunert Grit G Furch Alexandra C U ACU

International journal of molecular sciences 20210106 2

Forisomes are giant fusiform protein complexes composed of sieve element occlusion (SEO) protein monomers, exclusively found in sieve elements (SEs) of legumes. Forisomes block the phloem mass flow by a Ca2+-induced conformational change (swelling and rounding). We studied the forisome reactivity in four different legume species-Medicago sativa, Pisum sativum, Trifolium pratense and Vicia faba. Depending on the species, we found direct relationships between ...[more]

PMID: 33419062

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Dataset Information

Species-Specific and Distance-Dependent Dispersive Behaviour of Forisomes in Different Legume Species.

Publications

Species-Specific and Distance-Dependent Dispersive Behaviour of Forisomes in Different Legume Species.

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