Cell cycle inhibition by sodium butyrate in legume root meristems

Tramontano, William A.; Scanlon, Christine

doi:10.1016/0031-9422(95)00619-2

Cited by 8 publications

(1 citation statement)

References 13 publications

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“…Butyric acid and its derivatives are now widely being used to suppress gut parasitism by bacteria in agricultural/industrial animal production [ 77 , 78 ]. In isotope tracking experiments, Tramontano and Scanlon [ 79 ] showed that root meristem cells absorbed butyric and propionic acids and transported these compounds to the cell nucleus where the root cell responded by slowing cell division. Lanzagorta, de la Torre and Aller [ 80 ] found the 2 mM concentration of butyrate reversibly slowed the cell cycle of Allium cepa root tip meristem cells.…”

Section: Mechanisms For Microbe Entry Into Rootsmentioning

confidence: 99%

Rhizophagy Cycle: An Oxidative Process in Plants for Nutrient Extraction from Symbiotic Microbes

et al. 2018

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In this paper, we describe a mechanism for the transfer of nutrients from symbiotic microbes (bacteria and fungi) to host plant roots that we term the ‘rhizophagy cycle.’ In the rhizophagy cycle, microbes alternate between a root intracellular endophytic phase and a free-living soil phase. Microbes acquire soil nutrients in the free-living soil phase; nutrients are extracted through exposure to host-produced reactive oxygen in the intracellular endophytic phase. We conducted experiments on several seed-vectored microbes in several host species. We found that initially the symbiotic microbes grow on the rhizoplane in the exudate zone adjacent the root meristem. Microbes enter root tip meristem cells—locating within the periplasmic spaces between cell wall and plasma membrane. In the periplasmic spaces of root cells, microbes convert to wall-less protoplast forms. As root cells mature, microbes continue to be subjected to reactive oxygen (superoxide) produced by NADPH oxidases (NOX) on the root cell plasma membranes. Reactive oxygen degrades some of the intracellular microbes, also likely inducing electrolyte leakage from microbes—effectively extracting nutrients from microbes. Surviving bacteria in root epidermal cells trigger root hair elongation and as hairs elongate bacteria exit at the hair tips, reforming cell walls and cell shapes as microbes emerge into the rhizosphere where they may obtain additional nutrients. Precisely what nutrients are transferred through rhizophagy or how important this process is for nutrient acquisition is still unknown.

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