Regulation of Root Traits for Internal Aeration and Tolerance to Soil Waterlogging-Flooding Stress

Yamauchi, Takaki; Colmer, Timothy D.; Pedersen, Ole; Nakazono, Mikio

doi:10.1104/pp.17.01157

Cited by 227 publications

(206 citation statements)

References 102 publications

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“…Among the differentially expressed genes between S3/S2 and S1 pith cells, ethylene signalling pathway genes were significantly up‐regulated (Figures b,c and a). As expected, genes related to Ca 2+ , G‐protein and phospholipase C signalling pathways and ROS burst, which function as the downstream targets of the ethylene pathway (Rajhi et al ., ; Yamauchi et al ., ), were also found to be enhanced in the S3/S2 cells (Figures d,e and a). H 2 O 2 was indeed detected in the pith cells during the cavity formation (Figure c,d).…”

Section: Discussionmentioning

confidence: 73%

“…H 2 O 2 was indeed detected in the pith cells during the cavity formation (Figure c,d). A number of studies have reported that ethylene, ROS and Ca 2+ signalling plays important roles in the parenchymal cell death during the aerenchyma formation in rice (Yamauchi et al ., , ), wheat (Yamauchi et al ., ) and maize (Yamauchi et al ., ). For example, Rajhi et al .…”

Section: Discussionmentioning

confidence: 99%

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Morphological dissection and cellular and transcriptome characterizations of bamboo pith cavity formation reveal a pivotal role of genes related to programmed cell death

Guo

Sun

et al. 2018

Plant Biotechnology Journal

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Summary Pith cavity formation is critical for bamboo to overcome the bending force during its fast growth; however, the underlying molecular mechanisms remain largely unknown. Multiple approaches, including anatomical dissection, mathematical modelling and transcriptome profiling, were employed in this study to investigate the biology of pith cavity formation in bamboo Pseudosasa japonica . We found that the corruption of pith tissue occurred sequentially and asymmetrically from the top‐centre of the internode down to the bottom, which might be caused by the combined effects of asymmetrical radial and axial tensile forces during shoot‐wall cell elongation and spiral growth of bamboo internodes. Programmed cell death ( PCD ) in pitch manifested by TUNEL positive nuclei, DNA cleavage and degraded organelles, and potentially regulated by ethylene and calcium signalling pathway, ROS burst, cell wall modification, proteolysis and nutrient recycle genes, might be responsible for pith tissue corruption of Ps. japonica . Although similar physiological changes and transcriptome profiles were found in different bamboo species, different formation rates of pith cavity were observed, which might be caused by different pith cells across the internode that were negatively correlated with the culm diameter. These findings provided a systematical view on the formation of bamboo pith cavity and revealed that PCD plays an important role in the bamboo pith cavity formation.

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Section: Discussionmentioning

confidence: 73%

Section: Discussionmentioning

confidence: 99%

Morphological dissection and cellular and transcriptome characterizations of bamboo pith cavity formation reveal a pivotal role of genes related to programmed cell death

Guo

Sun

et al. 2018

Plant Biotechnology Journal

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“…However, the signalling network involved is unknown (Colmer et al, ; Yamauchi et al, ). The increased resistance to radial movement of O 2 is associated with deposition of suberin and/or lignin in the hypodermal or exodermal cell walls in roots of rice (Kotula et al, ; Watanabe, Nishiuchi, Kulichikhin, & Nakazono, ) and other species (Kotula, Schreiber, Colmer, & Nakazono, ; Soukup, Armstrong, Schreiber, Franke, & Votrubová, ; Watanabe et al, ; Yamauchi et al, ), although induction of a ROL barrier can occur within 2 days and the changes involved are more subtle than those detectable using histochemical stains (Shiono et al, ). Similar to the lack of any clear histochemical difference for roots of rice with a functional ROL barrier induced by 2 days in stagnant agar medium as compared with aerated controls (Shiono et al, ), in the present study, the staining for suberin of root cross sections at 50 mm behind the root apex, a position with ROL barrier induction (Figure ), also did not show any marked differences for suberin in the hypodermal or exodermal layer (Figure ).…”

Section: Discussionmentioning

confidence: 99%

Rice acclimation to soil flooding: Low concentrations of organic acids can trigger a barrier to radial oxygen loss in roots

Colmer

Kotula

Malik

et al. 2019

Plant Cell & Environment

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Waterlogged soils contain monocarboxylic acids produced by anaerobic microorganisms. These “organic acids” can accumulate to phytotoxic levels and promote development of a barrier to radial O2 loss (ROL) in roots of some wetland species. Environmental cues triggering root ROL barrier induction, a feature that together with tissue gas‐filled porosity facilitates internal aeration, are important to elucidate for knowledge of plant stress physiology. We tested the hypothesis that comparatively low, non‐toxic, concentrations of acetic, propionic, butyric, and/or hexanoic acids might induce root ROL barrier formation in rice. Each organic acid, individually, triggered the ROL barrier in roots but with no effect (acetic or butyric acids) or with only slight effects (propionic or hexanoic acids) on root extension. Transcripts of four genes related to suberin biosynthesis were increased by some of the organic acid treatments. Respiration in root tissues was not, or moderately, inhibited. Beyond a narrow concentration range, however, respiration declined exponentially and the order (least to greatest) for EC50 (effective concentration for 50% inhibition) was butyric, propionic, acetic, then hexanoic acid. An understanding of the environmental cue for root ROL barrier induction should enhance future work to elucidate the molecular regulation of this root trait contributing to plant flooding tolerance.

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“…When gas exchange with the atmosphere is limited, the constitutive production of ethylene ensures a robust early signal of coming limitations in O 2 as well as CO 2 . In waterlogged to completely submerged plants, increases in ethylene drive changes in the anatomy and morphology of root systems that enhance tissue aeration, including the enhancement of root aerenchyma in a number of species (Yamauchi et al, 2018). Once O 2 levels fall beyond an undetermined cellular threshold, transcriptional activators of the group VII subclass of Ethylene Responsive Factors (ERF-VIIs) that are constitutively synthesized become stabilized, as reviewed in detail by Giuntoli and Perata (2018).…”

Section: Oxygen: Both Metabolic Necessity and Developmental Cuementioning

confidence: 99%

“…New research from Eysholdt-Derzsó and Sauter (2017) demonstrates that auxin-mediated upward bending of Arabidopsis roots under hypoxia is limited by the ERF-VII RAP2.12, revealing that they antagonize the establishment of an auxin gradient. Partially flooded semiaquatic plants typically develop highly porous adventitious roots that develop on stems of dicots or at the stem node of monocots (Yamauchi et al, 2018). These roots need to be near to the air-water interface to be well aerated.…”

Section: Oxygen: Both Metabolic Necessity and Developmental Cuementioning

confidence: 99%

The Dynamic Plant: Capture, Transformation, and Management of Energy

Bailey‐Serres¹,

Pierik²,

Ruban³

et al. 2018

Plant Physiology

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Plants are exquisite in their capacity to convert photons of light through photosynthetic carbon dioxide (CO 2 ) fixation into carbohydrate resources that are assimilated and partitioned from photosynthetic source to sink tissues. The chemical energy gained from photosynthesis includes ATP and NADPH that along with sugars are vital to biosynthetic processes, cell proliferation, biomass production, and reproductive fitness. As in all eukaryotes, plants are dependent upon dioxygen (O 2 ) for efficient production of ATP through aerobic respiration by mitochondria. Therefore, O 2 is crucial for the efficient catabolism of carbohydrates, lipids, and protein into chemical energy in leaves in the light and darkness, as well as in sink tissues. In this Focus Issue, numerous reviews and research articles explore the integration of light, O 2 , and energy metabolism from the cellular to the whole-plant level. The articles analyze molecular, biochemical, physiological, and developmental mechanisms that contribute to the plant's energy balance. A recurrent theme is the integration of light, O 2 , and sugar sensing with signal transduction and gene regulation, resulting in metabolic and developmental plasticity that maximizes available energy for growth. This knowledge expands opportunities to enhance photosynthetic efficiency and finetune energy allocation to maximize yields of crops.

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Regulation of Root Traits for Internal Aeration and Tolerance to Soil Waterlogging-Flooding Stress

Cited by 227 publications

References 102 publications

Morphological dissection and cellular and transcriptome characterizations of bamboo pith cavity formation reveal a pivotal role of genes related to programmed cell death

Morphological dissection and cellular and transcriptome characterizations of bamboo pith cavity formation reveal a pivotal role of genes related to programmed cell death

Rice acclimation to soil flooding: Low concentrations of organic acids can trigger a barrier to radial oxygen loss in roots

The Dynamic Plant: Capture, Transformation, and Management of Energy

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