Stem cell fate in hypoxic root apical meristems is influenced by phytoglobin expression

Mira, Mohamed M.; El‐Khateeb, Eman; Gaafar, Reda M.; Igamberdiev, Abir U.; Hill, Robert D.; Stasolla, Claudio

doi:10.1093/jxb/erz410

Cited by 15 publications

(16 citation statements)

References 41 publications

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“…Thus, the QC serves as a reservoir of cells able to restore root growth in the case of significant damage. Mitotic activation of the QC occurs following root cap cutting ( Jiang et al , 2003 ; Ivanov et al , 2011 ; Bystrova et al , 2015 ), chilling stress ( Clowes and Stewart, 1967 ; Barlow and Rathfelder, 1985 ), flooding-induced hypoxia ( Mira et al , 2020 ), lead-induced toxicity stress ( Kozhevnikova et al , 2007 ), and heat exposure ( Clowes and Wadekar, 1989 ; Kidner et al , 2000 ; Heyman et al , 2013 ).…”

Section: Specific Cellular Stress Responses In the Root Stem Cell Nichementioning

confidence: 99%

Mechanisms of stress response in the root stem cell niche

Ubogoeva

Zemlyanskaya

et al. 2021

Journal of Experimental Botany

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As plants are sessile organisms unable to escape from environmental hazards, they need to adapt for survival. The stem cell niche in the root apical meristem is particularly sensitive to DNA damage induced by environmental stresses such as chilling, flooding, wounding, UV, and irradiation. DNA damage has been proven to cause stem cell death, with stele stem cells being the most vulnerable. Stress also induces the division of quiescent center cells. Both reactions disturb the structure and activity of the root stem cell niche temporally; however, this preserves root meristem integrity and functioning long-term. Plants have evolved many mechanisms that ensure stem cell niche maintenance, recovery, and acclimation, allowing them to survive in a changing environment. Here, we give an overview of the cellular and molecular aspects of stress responses in the root stem cell niche.

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Section: Specific Cellular Stress Responses In the Root Stem Cell Nichementioning

confidence: 99%

Mechanisms of stress response in the root stem cell niche

Ubogoeva

Zemlyanskaya

et al. 2021

Journal of Experimental Botany

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“…The color was developed with the reaction of α,α′‐dipyridyl with FeCl 3 , was recorded at 525 nm (Mira et al. , 2020). The measurement method for GSH and GSSG is dependent on the reactivity of 5‐5′‐dithiobis‐(2‐nitrobenzoic acid) with GSH, in the formation of 5‐thionitrobenzoic acid, with an absorbance at 412 nm.…”

Section: Methodsmentioning

confidence: 99%

“…Finally, the reduced/oxidized ASC and glutathione levels were assessed according to the calibration curves (Mira et al. , 2020).…”

Section: Methodsmentioning

confidence: 99%

Nuclear transport factor GmNTF2B‐1 enhances soybean drought tolerance by interacting with oxidoreductase GmOXR17 to reduce reactive oxygen species content

Chen

Tang

et al. 2021

The Plant Journal

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SUMMARY Drought is a critical abiotic stressor that modulates soybean yield. Drought stress drastically enhances reactive oxygen species (ROS) formation, and maintaining ROS content above a cytostatic level but below a cytotoxic level is essential for normal biology processes in plants. At present, most of the known ROS‐scavenging systems are in the cytoplasm, and the mechanism of ROS regulation in the nucleus remains unclear. GmNTF2B‐1 is a member of the IV subgroup in the nucleus transporter family. Its expression is localized to the roots and is stimulated by drought stress. In this study, the overexpression of GmNTF2B‐1 was found to improve the drought tolerance of transgenic soybean by influencing the ROS content in plants. An oxidoreductase, GmOXR17, was identified to interact with GmNTF2B‐1 in the nucleus through the yeast two‐hybrid, coimmunoprecipitation and bimolecular fluorescence complementation assays. The drought tolerance of GmOXR17 transgenic soybean was similar to that of GmNTF2B‐1. GmNTF2B‐1 was expressed in both cytoplasm and nucleus, and GmOXR17 transferred from the cytoplasm to the nucleus under drought stress. The overexpression of GmNTF2B‐1 enhanced the nuclear entry of GmOXR17, and the overexpression of GmNTF2B‐1 or GmOXR17 could decrease the H2O2 content and oxidation level in the nucleus. In conclusion, the interaction between GmNTF2B‐1 and GmOXR17 may enhance the nuclear entry of GmOXR17, thereby enhancing nuclear ROS scavenging to improve the drought resistance of soybean.

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“…Activation of depolarization-activated outward-rectifying potassium channels can improve potassium retention and confer hypoxia stress tolerance in barley [ 64 ]. In maize, waterlogging exerts severe impacts on the roots rather than the shoots [ 65 ], limiting root function due to hypoxia perturbed auxin flow/distribution, which is required to establish a quiescent center, and suppressing phytoglobins that can stabilize root performance under low oxygen conditions [ 66 ]. In addition, an improvement in root architecture and enhancement of chlorophyll biosynthesis through overexpression of ZmCAO1 enhanced maize tolerance to waterlogging [ 67 ].…”

Section: Morphophysiological Changes Of Plants During Floodingmentioning

confidence: 99%

The Role of Phytohormones in Plant Response to Flooding

Wang

Komatsu

2022

IJMS

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Climatic variations influence the morphological, physiological, biological, and biochemical states of plants. Plant responses to abiotic stress include biochemical adjustments, regulation of proteins, molecular mechanisms, and alteration of post-translational modifications, as well as signal transduction. Among the various abiotic stresses, flooding stress adversely affects the growth of plants, including various economically important crops. Biochemical and biological techniques, including proteomic techniques, provide a thorough understanding of the molecular mechanisms during flooding conditions. In particular, plants can cope with flooding conditions by embracing an orchestrated set of morphological adaptations and physiological adjustments that are regulated by an elaborate hormonal signaling network. With the help of these findings, the main objective is to identify plant responses to flooding and utilize that information for the development of flood-tolerant plants. This review provides an insight into the role of phytohormones in plant response mechanisms to flooding stress, as well as different mitigation strategies that can be successfully administered to improve plant growth during stress exposure. Ultimately, this review will expedite marker-assisted genetic enhancement studies in crops for developing high-yield lines or varieties with flood tolerance.

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Stem cell fate in hypoxic root apical meristems is influenced by phytoglobin expression

Abstract: Overexpression of phytoglobin retains stem cell fate specification and function in hypoxic root apical meristems

Cited by 15 publications

References 41 publications

Mechanisms of stress response in the root stem cell niche

Mechanisms of stress response in the root stem cell niche

Nuclear transport factor GmNTF2B‐1 enhances soybean drought tolerance by interacting with oxidoreductase GmOXR17 to reduce reactive oxygen species content

The Role of Phytohormones in Plant Response to Flooding

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