Adventitious lateral rooting: the plasticity of root system architecture

Ge, Yachao; Fang, Xing; Liu, Wu; Sheng, Lihong; Xu, Lin

doi:10.1111/ppl.12741

Cited by 27 publications

(17 citation statements)

References 32 publications

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“…In A. thaliana , AR initiation is also controlled by auxin, which includes four main cell fate transition steps [61,62]. The first step involves the activation of WUSCHEL-RELATED HOMEOBOX11 and 12 ( WOX11/12 ) by auxin and results in the formation of root founder cells from regeneration-competent cells [61,63,64]. The second step is the activations of WOX5/7 and LATERAL ORGAN BOUNDARIES DOMAIN16 ( LBD16 ) by WOX11/12 and leads to the formation of root primordium cells from root founder cells [61,65,66].…”

Section: Key Genes To Be Identified In Auxin-mediated Ar Formationmentioning

confidence: 99%

Auxin-Induced Adventitious Root Formation in Nodal Cuttings of Camellia sinensis

Wei

Ruan

Wang

et al. 2019

IJMS

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Adventitious root (AR) formation is essential for the successful propagation of Camellia sinensis and auxins play promotive effects on this process. Nowadays, the mechanism of auxin-induced AR formation in tea cuttings is widely studied. However, a lack of global view of the underlying mechanism has largely inhibited further studies. In this paper, recent advances including endogenous hormone changes, nitric oxide (NO) and hydrogen peroxide (H2O2) signals, secondary metabolism, cell wall reconstruction, and mechanisms involved in auxin signaling are reviewed. A further time course analysis of transcriptome changes in tea cuttings during AR formation is also suggested to deepen our understanding. The purpose of this paper is to offer an overview on the most recent developments especially on those key aspects affected by auxins and that play important roles in AR formation in tea plants.

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Section: Key Genes To Be Identified In Auxin-mediated Ar Formationmentioning

confidence: 99%

Auxin-Induced Adventitious Root Formation in Nodal Cuttings of Camellia sinensis

Wei

Ruan

Wang

et al. 2019

IJMS

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“…Depending on the molecular pathway and tissue of origin, secondary roots can be either lateral roots (LRs) or lateral adventitious roots. If side roots are derived from non-root tissue, they are called adventitious roots [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Nature and Nurture: Genotype-Dependent Differential Responses of Root Architecture to Agar and Soil Environments

Kerstens

Hesen

Yalamanchili

et al. 2021

Genes

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Root development is crucial for plant growth and therefore a key factor in plant performance and food production. Arabidopsis thaliana is the most commonly used system to study root system architecture (RSA). Growing plants on agar-based media has always been routine practice, but this approach poorly reflects the natural situation, which fact in recent years has led to a dramatic shift toward studying RSA in soil. Here, we directly compare RSA responses to agar-based medium (plates) and potting soil (rhizotrons) for a set of redundant loss-of-function plethora (plt) CRISPR mutants with variable degrees of secondary root defects. We demonstrate that plt3plt7 and plt3plt5plt7 plants, which produce only a handful of emerged secondary roots, can be distinguished from other genotypes based on both RSA shape and individual traits on plates and rhizotrons. However, in rhizotrons the secondary root density and the total contribution of the side root system to the RSA is increased in these two mutants, effectively rendering their phenotypes less distinct compared to WT. On the other hand, plt3, plt3plt5, and plt5plt7 mutants showed an opposite effect by having reduced secondary root density in rhizotrons. This leads us to believe that plate versus rhizotron responses are genotype dependent, and these differential responses were also observed in unrelated mutants short-root and scarecrow. Our study demonstrates that the type of growth system affects the RSA differently across genotypes, hence the optimal choice of growth conditions to analyze RSA phenotype is not predetermined.

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“…Therefore, root morphology is the primary trait that in uences plant resource acquisition. To maximize access to soil nutrients, LRs are formed from the primary roots (PRs) and adventitious roots (ARs) to expand the total length and surface area of the actively absorbing root system (Nibau et al, 2008;Ge et al, 2019). LRs are initiated through activation of pericycle cells at the xylem poles (Casimiro et al, 2003), and the development of LRs is known to be a result of the interaction between the plant itself and environmental stimuli (Postma et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Effect of Exogenous Abscisic acid (ABA) on the Morphology, Phytohormones, and Related Gene Expression of Developing Lateral Roots in ‘Qingzhen 1’

Zhang

Tahir

et al. 2021

Preprint

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Lateral roots (LRs) are critical for plant stress tolerance and productivity. Understanding how hormones and genes interact in a fluctuating environment to coordinate LR development is a major challenge. Abscisic acid (ABA) is the primary stress-responsive hormone and mediates LR development in various plant species. However, the effect of exogenous ABA on LR development has not been elucidated in apple. In this study, ‘Qingzhen 1’ was treated with exogenous 5 µM ABA for 20 days to investigate the regulation mechanism of ABA on LR development. Morphological observations advocated that ABA inhibited both LR and shoot development in ‘Qingzhen 1’ apple plants, where the root number was 16.94%, the root length was 30.32%, the plant height was 10.88%, and the stem thickness was 8.08% lower than those in the control plants. Meanwhile, the endogenous ABA concentration was significantly increased, but the indole-3-acetic acid (IAA), zeatin riboside (ZR), and jasmonic acid (JA) concentrations were significantly decreased with ABA treatment. Furthermore, the expression levels of ABA-related genes (MdCYP707A2, MdABI1, MdAREB2, and MdABF3) were significantly upregulated, while the expression levels of auxin-related genes (MdYUCCA3, MdYUCCA8, MdPIN1 MdPIN2, MdPIN3, and MdARF19), root development-related genes (MdWOX5 and MdWOX11), and cell cycle-related genes (MdCYCD1;1 and MdCYCD3;1) were significantly downregulated at the early stage of ABA treatment, which act together on the inhibition of LR development. Taken together, the changes in hormone levels and gene expression resulted in inhibited LR development of apple plants in response to ABA.

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Adventitious lateral rooting: the plasticity of root system architecture

Cited by 27 publications

References 32 publications

Auxin-Induced Adventitious Root Formation in Nodal Cuttings of Camellia sinensis

Auxin-Induced Adventitious Root Formation in Nodal Cuttings of Camellia sinensis

Nature and Nurture: Genotype-Dependent Differential Responses of Root Architecture to Agar and Soil Environments

Effect of Exogenous Abscisic acid (ABA) on the Morphology, Phytohormones, and Related Gene Expression of Developing Lateral Roots in ‘Qingzhen 1’

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