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

Autor: Maria K. Paulmann, Grit Kunert, Aart J. E. van Bel, Linus Wegner, Alexandra C. U. Furch, Matthias R. Zimmermann
Jazyk: angličtina
Rok vydání: 2021
Předmět:
0106 biological sciences
0301 basic medicine
Conformational change
Medicago sativa
01 natural sciences
lcsh:Chemistry
Trifolium pratense
Dispersion (optics)
Pisum sativum
lcsh:QH301-705.5
Spectroscopy
Legume
Plant Proteins
systemic signalling
biology
Chemistry
Temperature
food and beverages
Fabaceae
General Medicine
Computer Science Applications
Vicia faba
Phloem
Catalysis
Article
Pisum
Inorganic Chemistry
03 medical and health sciences
Forisome
Species Specificity
Critical threshold
sieve-tube occlusion
Physical and Theoretical Chemistry
Molecular Biology
Organic Chemistry
Peas
biology.organism_classification
electrophysiology
Electrophysiological Phenomena
Plant Leaves
030104 developmental biology
lcsh:Biology (General)
lcsh:QD1-999
Biophysics
Calcium
010606 plant biology & botany
forisome
Zdroj: International Journal of Molecular Sciences
Volume 22
Issue 2
International Journal of Molecular Sciences, Vol 22, Iss 492, p 492 (2021)
ISSN: 1422-0067
DOI: 10.3390/ijms22020492
Popis: 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&mdash
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)&mdash
overlapping action (APs), and variation potentials (VPs)&mdash
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.
Databáze: OpenAIRE
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