Involvement of G1-to-S transition and AhAUX-dependent auxin transport in abscisic acid-induced inhibition of lateral root primodia initiation in Arachis hypogaea L

Guo, Dongliang; Liang, Jianhua; Qiao, Yunfeng; Yan, Youchen; Li, Ling; Dai, Yanhong

doi:10.1016/j.jplph.2012.03.014

Cited by 21 publications

(14 citation statements)

References 52 publications

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“…It is possible that GA may have an AR phase-dependent effect, being inhibitory to root induction and stimulatory to formation. ABA also acts as an inhibitor of lateral root development in Arachis hypogaea by blocking cell cycle progression (Guo et al, 2012). Inhibition of adventitious root formation step by ABA was also reported in deep water rice (Steffens et al, 2006).…”

Section: Phytohormonal Balances: the Seesaw Of Promotion Versus Reprementioning

confidence: 99%

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When stress and development go hand in hand: main hormonal controls of adventitious rooting in cuttings

Costa¹,

Almeida²,

Ruedell³

et al. 2013

Front. Plant Sci.

313

280

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Adventitious rooting (AR) is a multifactorial response leading to new roots at the base of stem cuttings, and the establishment of a complete and autonomous plant. AR has two main phases: (a) induction, with a requirement for higher auxin concentration; (b) formation, inhibited by high auxin and in which anatomical changes take place. The first stages of this process in severed organs necessarily include wounding and water stress responses which may trigger hormonal changes that contribute to reprogram target cells that are competent to respond to rooting stimuli. At severance, the roles of jasmonate and abscisic acid are critical for wound response and perhaps sink strength establishment, although their negative roles on the cell cycle may inhibit root induction. Strigolactones may also inhibit AR. A reduced concentration of cytokinins in cuttings results from the separation of the root system, whose tips are a relevant source of these root induction inhibitors. The combined increased accumulation of basipetally transported auxins from the shoot apex at the cutting base is often sufficient for AR in easy-to-root species. The role of peroxidases and phenolic compounds in auxin catabolism may be critical at these early stages right after wounding. The events leading to AR strongly depend on mother plant nutritional status, both in terms of minerals and carbohydrates, as well as on sink establishment at cutting bases. Auxins play a central role in AR. Auxin transporters control auxin canalization to target cells. There, auxins act primarily through selective proteolysis and cell wall loosening, via their receptor proteins TIR1 (transport inhibitor response 1) and ABP1 (Auxin-Binding Protein 1). A complex microRNA circuitry is involved in the control of auxin response factors essential for gene expression in AR. After root establishment, new hormonal controls take place, with auxins being required at lower concentrations for root meristem maintenance and cytokinins needed for root tissue differentiation.

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Section: Phytohormonal Balances: the Seesaw Of Promotion Versus Reprementioning

confidence: 99%

“…A-type cyclins (CYCA) are present in S–M, whereas B-type cyclin (CYCB) act in G2–M transition and during M period (De Veylder et al, 2007). G1–S transition may be blocked by abscisic acid, causing inhibition of lateral root primordia initiation in peanut (Guo et al, 2012). …”

Section: Cell Cycle and Division – New Meristemsmentioning

confidence: 99%

When stress and development go hand in hand: main hormonal controls of adventitious rooting in cuttings

Costa¹,

Almeida²,

Ruedell³

et al. 2013

Front. Plant Sci.

313

280

View full text Add to dashboard Cite

show abstract

“…ABA acts as an auxin antagonist during LR initiation (Signora et al, 2001; De Smet et al, 2003; Fukaki and Tasaka, 2009; Guo et al, 2009). Besides the direct role in LR initiation, ABA mediates the balance between cytokinin and auxin and thus also indirectly inhibits LR formation (Shkolnik-Inbar and Bar-Zvi, 2010; Guo et al, 2012). Ethylene mediates auxin responses to inhibit LR formation (Růžička et al, 2007; Vandenbussche and Van Der Straeten, 2007; Negi et al, 2008, 2010; Lewis et al, 2011; Muday et al, 2012).…”

Section: Different Root-types In Arabidopsis Thalianamentioning

confidence: 99%

Hypocotyl adventitious root organogenesis differs from lateral root development

2014

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Wound-induced adventitious root (AR) formation is a requirement for plant survival upon root damage inflicted by pathogen attack, but also during the regeneration of plant stem cuttings for clonal propagation of elite plant varieties. Yet, adventitious rooting also takes place without wounding. This happens for example in etiolated Arabidopsis thaliana hypocotyls, in which AR initiate upon de-etiolation or in tomato seedlings, in which AR initiate upon flooding or high water availability. In the hypocotyl AR originate from a cell layer reminiscent to the pericycle in the primary root (PR) and the initiated AR share histological and developmental characteristics with lateral roots (LRs). In contrast to the PR however, the hypocotyl is a determinate structure with an established final number of cells. This points to differences between the induction of hypocotyl AR and LR on the PR, as the latter grows indeterminately. The induction of AR on the hypocotyl takes place in environmental conditions that differ from those that control LR formation. Hence, AR formation depends on differentially regulated gene products. Similarly to AR induction in stem cuttings, the capacity to induce hypocotyl AR is genotype-dependent and the plant growth regulator auxin is a key regulator controlling the rooting response. The hormones cytokinins, ethylene, jasmonic acid, and strigolactones in general reduce the root-inducing capacity. The involvement of this many regulators indicates that a tight control and fine-tuning of the initiation and emergence of AR exists. Recently, several genetic factors, specific to hypocotyl adventitious rooting in A. thaliana, have been uncovered. These factors reveal a dedicated signaling network that drives AR formation in the Arabidopsis hypocotyl. Here we provide an overview of the environmental and genetic factors controlling hypocotyl-born AR and we summarize how AR formation and the regulating factors of this organogenesis are distinct from LR induction.

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“…23 Other hormones like ethylene, ABA, cytokinin, gibberellic acids, brassinosteroids and SLs act during LR formation via interference with auxin synthesis, transport and sensitivity indicating auxin as a central player in LR formation. [24][25][26][27][28][29][30][31][32][33] Adventitious roots (ARs) are post-embryonic roots known to originate from hypocotyl, stem, leaf petiole and non-pericycle tissues of old roots. In young stem, AR commonly arise from the interfascicular parenchyma while in older stem they appear from vascular rays near the cambium.…”

Section: Introductionmentioning

confidence: 99%

Nitric oxide mediates strigolactone signaling in auxin and ethylene-sensitive lateral root formation in sunflower seedlings

Bharti

Bhatla²

2015

Plant Signaling & Behavior

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Strigolactones (SLs) play significant role in shaping root architecture whereby auxin-SL crosstalk has been observed in SL-mediated responses of primary root elongation, lateral root formation and adventitious root (AR) initiation. Whereas GR24 (a synthetic strigolactone) inhibits LR and AR formation, the effect of SL biosynthesis inhibitor (fluridone) is just the opposite (root proliferation). Naphthylphthalamic acid (NPA) leads to LR proliferation but completely inhibits AR development. The diffusive distribution of PIN1 in the provascular cells in the differentiating zone of the roots in response to GR24, fluridone or NPA treatments further indicates the involvement of localized auxin accumulation in LR development responses. Inhibition of LR formation by GR24 treatment coincides with inhibition of ACC synthase activity. Profuse LR development by fluridone and NPA treatments correlates with enhanced [Ca 2C ] cyt in the apical region and differentiating zones of LR, indicating a critical role of [Ca 2C ] in LR development in response to the coordinated action of auxins, ethylene and SLs. Significant enhancement of carotenoid cleavage dioxygenase (CCD) activity (enzyme responsible for SL biosynthesis) in tissue homogenates in presence of cPTIO (NO scavenger) indicates the role of endogenous NO as a negative modulator of CCD activity. Differences in the spatial distribution of NO in the primary and lateral roots further highlight the involvement of NO in SL-modulated root morphogenesis in sunflower seedlings. Present work provides new report on the negative modulation of SL biosynthesis through modulation of CCD activity by endogenous nitric oxide during SL-modulated LR development.

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Involvement of G1-to-S transition and AhAUX-dependent auxin transport in abscisic acid-induced inhibition of lateral root primodia initiation in Arachis hypogaea L

Cited by 21 publications

References 52 publications

When stress and development go hand in hand: main hormonal controls of adventitious rooting in cuttings

When stress and development go hand in hand: main hormonal controls of adventitious rooting in cuttings

Hypocotyl adventitious root organogenesis differs from lateral root development

Nitric oxide mediates strigolactone signaling in auxin and ethylene-sensitive lateral root formation in sunflower seedlings

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