The role of root border cells in plant defense

Hawes, Martha C.; Gunawardena, Uvini; Miyasaka, Susan C.; Zhao, Xuezhi

doi:10.1016/s1360-1385(00)01556-9

Cited by 326 publications

(232 citation statements)

References 29 publications

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“…In maize, a Ca 2ϩ -independent protein kinase was also detected in the elongation zone of primary roots (10). Generally, the root tip is a dynamic and specialized tissue that plays a crucial role in sensing water and nutrients and responds by transmitting appropriate signals (34). Root-specific protein kinases, such as SRK2C, may have some important roles in root tissues as a sensor of water and nutrient status in soil.…”

Section: Discussionmentioning

confidence: 99%

SRK2C, a SNF1-related protein kinase 2, improves drought tolerance by controlling stress-responsive gene expression in Arabidopsis thaliana

Umezawa

Yoshida

Maruyama

et al. 2004

Proc. Natl. Acad. Sci. U.S.A.

325

225

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Protein phosphorylation͞dephosphorylation are major signaling events induced by osmotic stress in higher plants. Here, we showed that a SNF1-related protein kinase 2 (SnRK2), SRK2C, is an osmoticstress-activated protein kinase in Arabidopsis thaliana that can significantly impact drought tolerance of Arabidopsis plants. Knockout mutants of SRK2C exhibited drought hypersensitivity in their roots, suggesting that SRK2C is a positive regulator of drought tolerance in Arabidopsis roots. Additionally, transgenic plants with CaMV35S promoter::SRK2C-GFP displayed higher overall drought tolerance than control plants. Whereas stomatal regulation in 35S::SRK2C-GFP plants was not altered, microarray analysis revealed that their drought tolerance coincided with up-regulation of many stress-responsive genes, for example, RD29A, COR15A, and DREB1A͞CBF3. From these results, we concluded that SRK2C is capable of mediating signals initiated during drought stress, resulting in appropriate gene expression. Our present study reveals new insights around signal output from osmotic-stress-activated SnRK2 protein kinase as well as supporting feasibility of manipulating SnRK2 toward improving plant osmotic-stress tolerance.

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Section: Discussionmentioning

confidence: 99%

SRK2C, a SNF1-related protein kinase 2, improves drought tolerance by controlling stress-responsive gene expression in Arabidopsis thaliana

Umezawa

Yoshida

Maruyama

et al. 2004

Proc. Natl. Acad. Sci. U.S.A.

325

225

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“…The incorporation of Rhizoctonia specific mycovirus into genome of cereals also is a promising possibility [94], with special regard to root border cells. These, detached living cells form the "front line" in the soil, the special part of rhizosphere, described as a system first by Hawes [95], where the plant controls the microenvironment with these specially progammed cells [96]. The border cells have indisputably key function in plant defense controlling the dynamics of adjacent microbial populations in the soil to foster beneficial associations and inhibit pathogenic invasion [97], thus these cells are plausible objects of genetic engineering to desing wheat plant with optimum characteristics for root health management.…”

Section: Future Prospectsmentioning

confidence: 99%

Susceptibility of Wheat Varieties to Soil-Borne <i>Rhizoctonia</i> Infection

Oros¹,

Naàr²,

Magyar³

2013

AJPS

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Response of 19 wheat varieties cultivated in Hungary varied within large limits to soil borne Rhizoctonia infection. The most frequent symptom, usually leading to damping off was the root neck necrosis. Four significant factors influencing the susceptibility of wheat comprised 71% of total variation but none of them was dominant. The inhibition of development of survivors in Rhizoctonia infested soil correlated with overall susceptibility of variety concerned. The varieties Emese, Kikelet and Palotás are proved to be less susceptible, but none of the varieties could be certified as tolerant. No relationships were revealed between pathogenicity of 26 Rhizoctonia strains studied and their taxonomic position or origin. The anamorph strains of Athelia, Ceratobasidium, Ceratorhiza and Waitea similar to Thanatephorus anamorphs selectively infected the wheat varieties, but the syndromatic pictures were undistinguishable with unarmed eye. R. solani was proved to be more aggressive against germinating wheat than R. cerealis. Nine significant factors influencing the virulence of Rhizoctonia strains comprised 82% of total variation, and six of them influenced exclusively Thanatephorus anamorphs.

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“…Root border cells play an important role in regulating the root circumstance (Driouich et al, 2007;Wen et al, 2007). Release of Al-binding mucilage by border cells could play a role in protecting root tips from Al-induced cellular damages (Hawes et al, 2000). It has also been shown that border cells have different responses to microorganism infection (Vicré et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Developmental characteristics and response to iron toxicity of root border cells in rice seedlings

Xing

Zhu

Cai

et al. 2008

J. Zhejiang Univ. Sci. B

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Abstract:To investigate the Fe 2+ effects on root tips in rice plant, experiments were carried out using border cells in vitro. The border cells were pre-planted in aeroponic culture and detached from root tips. Most border cells have a long elliptical shape. The number and the viability of border cells in situ reached the maxima of 1600 and 97.5%, respectively, at 20~25 mm root length. This mortality was more pronounced at the first 1~12 h exposure to 250 mg/L Fe 2+ than at the last 12~36 h. After 36 h, the cell viability exposed to 250 mg/L Fe 2+ decreased to nought, whereas it was 46.5% at 0 mg/L Fe

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The role of root border cells in plant defense

Cited by 326 publications

References 29 publications

SRK2C, a SNF1-related protein kinase 2, improves drought tolerance by controlling stress-responsive gene expression in Arabidopsis thaliana

SRK2C, a SNF1-related protein kinase 2, improves drought tolerance by controlling stress-responsive gene expression in Arabidopsis thaliana

Susceptibility of Wheat Varieties to Soil-Borne <i>Rhizoctonia</i> Infection

Developmental characteristics and response to iron toxicity of root border cells in rice seedlings

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The role of root border cells in plant defense

Cited by 326 publications

References 29 publications

SRK2C, a SNF1-related protein kinase 2, improves drought tolerance by controlling stress-responsive gene expression in Arabidopsis thaliana

SRK2C, a SNF1-related protein kinase 2, improves drought tolerance by controlling stress-responsive gene expression in Arabidopsis thaliana

Susceptibility of Wheat Varieties to Soil-Borne &lt;i&gt;Rhizoctonia&lt;/i&gt; Infection

Developmental characteristics and response to iron toxicity of root border cells in rice seedlings

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Susceptibility of Wheat Varieties to Soil-Borne <i>Rhizoctonia</i> Infection