Ethylene Upregulates Auxin Biosynthesis in Arabidopsis Seedlings to Enhance Inhibition of Root Cell Elongation[W]

By R. Swarup, P. Perry, D. Hagenbeek, D. Van Der Straeten, Gerrit T. S. Beemster, G. Sandberg, R. Bhalerao, K. Ljung, Malcolm J. Bennett. The Plant Cell Online, 2007

601 citations recorded by the source corpus.

Ethylene represents an important regulatory signal for root development. Genetic studies in Arabidopsis thaliana have demonstrated that ethylene inhibition of root growth involves another hormone signal, auxin. This study investigated why auxin was required by ethylene to regulate root growth. We initially observed that ethylene positively controls auxin biosynthesis in the root apex. We subsequently demonstrated that ethylene-regulated root growth is dependent on (1) the transport of auxin from the root apex via the lateral root cap and (2) auxin responses occurring in multiple elongation zone tissues. Detailed growth studies revealed that the ability of the ethylene precursor 1-aminocyclopropane-1-carboxylic acid to inhibit root cell elongation was significantly enhanced in the presence of auxin. We conclude that by upregulating auxin biosynthesis, ethylene facilitates its ability to inhibit root cell expansion.

Subfields: Plant Science

View Paper: https://www.semanticscholar.org/paper/1db22cb381aad5a09784d310c67b6d5d29310b34

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Citations in the corpus

TAA1-mediated auxin biosynthesis is essential for hormone crosstalk and plant development. (2008, background): “Local Activation of Auxin Biosynthesis Mediates Tissue-Specific Ethylene Responses Several mechanistic models for the ethylene-auxin crosstalk in roots have been proposed (Ruzicka et al., 2007; Stepanova et al., 2007; Swarup et al., 2007).”
Acquisition of phosphorus and nitrogen in the rhizosphere and plant growth promotion by microorganisms (2009, background): “It appears that ethylene triggers the accumulation of auxin in the root apex (Stepanova et al. 2005) and that the transport of auxin from the apex to the elongation zone of roots is required for ethylene to inhibit root growth (Swarup et al. 2007).”
Recent advances in ethylene research. (2009, background): “, 2006), root formation (Swarup et al., 2007; Ivanchenko et al., 2008; Negi et al., 2008), response to pathogens (reviewed by Kevin et al.”
Rhizobacterial mediation of plant hormone status (2010, background): “Although ethylene is usually regarded as an inhibitor of primary root elongation (Swarup et al., 2007) and lateral root formation (Negi et al.”
Ethylene Regulates Root Growth through Effects on Auxin Biosynthesis and Transport-Dependent Auxin Distribution[W] (2007, unknown): “In addition, transactivation studies (Swarup et al., 2007) speciﬁed that inhibition of the auxin response by accumulation of AXR3 in the cortex and the epidermis is sufﬁcient to determine the auxin and ethylene insensitivities of the root growth.”
Rhizosphere engineering: Enhancing sustainable plant ecosystem productivity (2017, unknown): “For example, ethylene controls root formation by regulating auxin transport within the root tip (Swarup et al., 2007), and stimulates the expression of auxin biosynthesis genes, and of AUX1 (auxin transporter protein 1) and PIN2 (PIN FORMED2 auxin transporter), resulting in an increased basipetal…”
Comprehending crystalline β-carotene accumulation by comparing engineered cell models and the natural carotenoid-rich system of citrus (2011, unknown): “Several previous studies have shown that ethylene inhibits root growth by up-regulating auxin biosynthesis and interfering with its transport process (Stepanova et al., 2005, 2007; Růzicka et al., 2007; Swarup et al., 2007; Negi et al., 2008).”
Auxin: the looping star in plant development. (2008, background): “The effect of ethylene on root development is likely to proceed via upregulation of auxin biosynthesis as well as modulation of auxin transport (102, 115).”