Sequential induction of auxin efflux and influx carriers regulates lateral root emergence
نویسندگان
چکیده
منابع مشابه
Sequential induction of auxin efflux and influx carriers regulates lateral root emergence
In Arabidopsis, lateral roots originate from pericycle cells deep within the primary root. New lateral root primordia (LRP) have to emerge through several overlaying tissues. Here, we report that auxin produced in new LRP is transported towards the outer tissues where it triggers cell separation by inducing both the auxin influx carrier LAX3 and cell-wall enzymes. LAX3 is expressed in just two ...
متن کاملLateral root emergence in Arabidopsis is dependent on transcription factor LBD29 regulating auxin influx carrier LAX3
Lateral root primordia (LRP) originate from pericycle stem cells located deep within parental root tissues. LRP emerge through overlying root tissues by inducing auxin-dependent cell separation and hydraulic changes in adjacent cells. The auxin inducible auxin influx carrier LAX3 plays a key role concentrating this signal in cells overlying LRP. Delimiting LAX3 expression to two adjacent cell f...
متن کاملShoot-supplied ammonium targets the root auxin influx carrier AUX1 and inhibits lateral root emergence in Arabidopsis.
Deposition of ammonium (NH₄+) from the atmosphere is a substantial environmental problem. While toxicity resulting from root exposure to NH₄+ is well studied, little is known about how shoot-supplied ammonium (SSA) affects root growth. In this study, we show that SSA significantly affects lateral root (LR) development. We show that SSA inhibits lateral root primordium (LRP) emergence, but not L...
متن کاملEthylene inhibits lateral root development, increases IAA transport and expression of PIN3 and PIN7 auxin efflux carriers.
We used genetic and molecular approaches to identify mechanisms by which the gaseous plant hormone ethylene reduces lateral root formation and enhances polar transport of the hormone auxin. Arabidopsis thaliana mutants, aux1, lax3, pin3 and pin7, which are defective in auxin influx and efflux proteins, were less sensitive to the inhibition of lateral root formation and stimulation of auxin tran...
متن کاملLateral root emergence in Arabidopsis is dependent on transcription factor LBD29 regulation of auxin influx carrier LAX3.
Lateral root primordia (LRP) originate from pericycle stem cells located deep within parental root tissues. LRP emerge through overlying root tissues by inducing auxin-dependent cell separation and hydraulic changes in adjacent cells. The auxin-inducible auxin influx carrier LAX3 plays a key role concentrating this signal in cells overlying LRP. Delimiting LAX3 expression to two adjacent cell f...
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ژورنال
عنوان ژورنال: Molecular Systems Biology
سال: 2013
ISSN: 1744-4292,1744-4292
DOI: 10.1038/msb.2013.43