Приказ основних података о документу

dc.creatorŽivanović, Branka D.
dc.creatorDanilović Luković, Jelena
dc.creatorKorac, Aleksandra
dc.creatorStanić, Marina
dc.creatorSpasić, Slađana
dc.creatorGalland, Paul
dc.date.accessioned2022-04-05T15:31:44Z
dc.date.available2022-04-05T15:31:44Z
dc.date.issued2021
dc.identifier.issn0033-183X
dc.identifier.urihttp://rimsi.imsi.bg.ac.rs/handle/123456789/1399
dc.description.abstractThe growing zone (GZ) of the unicellular coenocytic sporangiophore of Phycomyces blakesleeanus represents the site of stimulus reception (light, gravity, gas) and stimulus response, i.e., local modulations of the elongation growth, which may result, in dependence of the stimulus direction, in tropic bending. Until now, evidence for a possible participation of the columella in sensory reception is absent. We confirm with light microscopy earlier studies that show that the GZ and the columella are not separated by a membrane or cell wall, but rather form a spatial continuum that allows free exchange of cytoplasm and organelle transport. Evidence is presented that the columella is responsive to external stimuli. Columellae, from which spores and sporangial cell wall had been removed, respond to exogenous auxin with a local depolarization of the membrane potential and an increased growth rate of the GZ. In contrast, auxin applied to the GZ causes a decrease of the growth rate irrespective of the presence or absence of sporangia. The response pattern is specific and relevant for the sensory reception of Phycomyces, because the light-insensitive mutant C148carAmadC, which lacks the RAS-GAP protein MADC, displays abnormal IAA sensitivity and membrane depolarization. We argue that the traditional concept of the GZ as the only stimulus-sensitive zone should be abandoned in favor of a model in which GZ and columella operate as a single entity capable to orchestrate a multitude of stimulus inputs, including auxin, to modulate the membrane potential and elongation growth of the GZ.en
dc.publisherSpringer Wien, Wien
dc.relationDeutsche ForschungsgemeinschaftGerman Research Foundation (DFG) [GA 173/13-1]
dc.relationinfo:eu-repo/grantAgreement/MESTD/inst-2020/200053/RS//
dc.relationinfo:eu-repo/grantAgreement/MESTD/inst-2020/200178/RS//
dc.rightsrestrictedAccess
dc.sourceProtoplasma
dc.subjectVacuolesen
dc.subjectTransition zoneen
dc.subjectSporangiumen
dc.subjectMicroelectrodesen
dc.subjectLight microscopyen
dc.subjectGrowing zoneen
dc.titleSignal transduction in Phycomyces sporangiophores: columella as a novel sensory organelle mediating auxin-modulated growth rate and membrane potentialen
dc.typearticle
dc.rights.licenseARR
dc.citation.rankM21~
dc.identifier.doi10.1007/s00709-021-01709-y
dc.identifier.pmid34595603
dc.identifier.scopus2-s2.0-85116151223
dc.identifier.wos000702236700001
dc.type.versionpublishedVersion


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Приказ основних података о документу