The role of plant root systems in evolutionary adaptation

Shekhar, Vinay; Stöckle, Dorothee; Thellmann, Martha; Vermeer, Joop E. M.

doi:10.1016/bs.ctdb.2018.11.011

Cited by 30 publications

(28 citation statements)

References 124 publications

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“…As the belowground organ of the plant, root structure is shaped by soil bio-physico-chemical properties [ 29 , 30 ]. Salinity is a major abiotic stress that represses plant growth and crop yields, and the roots of young rice seedlings are highly salt-sensitive organs [ 31 ].…”

Section: Resultsmentioning

confidence: 99%

Salt Stress Promotes Abscisic Acid Accumulation to Affect Cell Proliferation and Expansion of Primary Roots in Rice

Huang

Zhou

et al. 2021

IJMS

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The primary root is the basic component of the root system and plays a key role in early seedling growth in rice. Its growth is easily affected by environmental cues, such as salt stress. Abscisic acid (ABA) plays an essential role in root development, but the molecular mechanism underlying ABA-regulated root growth in response to salt stress remains poorly understood. In this study, we report that salt stress inhibits primary root elongation and promotes primary root swelling. Moreover, salt stress induces the expression of ABA-responsive genes and ABA accumulation in the primary root, revealing that ABA plays an essential role in salt-modulated root growth. Transgenic lines of OsSAPK10-OE and OsABIL2-OE, which constitutively express OsSAPK10 or OsABIL2, with enhanced or attenuated ABA signaling, show increased and decreased sensitivity to salt, correspondingly. Microscopic analysis indicates that salt and ABA inhibits cell proliferation and promotes cell expansion in the root apical meristem. Transcriptome analysis showed that ABA induces the expression of EXPANSIN genes. Further investigations indicate that ABA exerts these effects largely through ABA signaling. Thus, our findings deepen our understanding of the role of ABA in controlling primary root growth in response to salt stress, and this knowledge can be used by breeders to cultivate rice varieties suitable for saline–alkali land.

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Section: Resultsmentioning

confidence: 99%

Salt Stress Promotes Abscisic Acid Accumulation to Affect Cell Proliferation and Expansion of Primary Roots in Rice

Huang

Zhou

et al. 2021

IJMS

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“…In fact, roots play fundamental roles in the plant by foraging underground resources such as minerals and water. They are also known for their enormous plasticity by which they can respond to extrinsic cues via modulating their growth [ 34 ]. Therefore, proper root development features healthy plants, but when root growth is tackled by abiotic constraints, the whole plant development is constrained.…”

Section: Discussionmentioning

confidence: 99%

Class III Peroxidases in Response to Multiple Abiotic Stresses in Arabidopsis thaliana Pyrenean Populations

Eljebbawi

Savelli

Libourel

et al. 2022

IJMS

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Class III peroxidases constitute a plant-specific multigene family, where 73 genes have been identified in Arabidopsis thaliana. These genes are members of the reactive oxygen species (ROS) regulatory network in the whole plant, but more importantly, at the root level. In response to abiotic stresses such as cold, heat, and salinity, their expression is significantly modified. To learn more about their transcriptional regulation, an integrative phenotypic, genomic, and transcriptomic study was executed on the roots of A. thaliana Pyrenean populations. Initially, the root phenotyping highlighted 3 Pyrenean populations to be tolerant to cold (Eaux), heat (Herr), and salt (Grip) stresses. Then, the RNA-seq analyses on these three populations, in addition to Col-0, displayed variations in CIII Prxs expression under stressful treatments and between different genotypes. Consequently, several CIII Prxs were particularly upregulated in the tolerant populations, suggesting novel and specific roles of these genes in plant tolerance against abiotic stresses.

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“…under various external pressures (Shekhar, Stӧckle, Thellmann, & Vermeer, 2019). The plant cell wall (CW) plays essential roles in such processes (Cosgrove, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…In cereals (including the monocot rice), the mechanisms remain unclear. Root systems balance cell proliferation, differentiation and programmed cell death (PCD) when engaging in morphological reconstruction that maintains optimal internal growth under various external pressures (Shekhar, Stӧckle, Thellmann, & Vermeer, 2019). The plant cell wall (CW) plays essential roles in such processes (Cosgrove, 2005).…”

Section: Introductionmentioning

confidence: 99%

OsHyPRP06/R3L1 regulates root system development and salt tolerance via apoplastic ROS homeostasis in rice (Oryza sativa L.)

Zhao

Wang

Chang

et al. 2021

Plant Cell & Environment

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Plant root morphology is constantly reshaped in response to triggers from the soil environment. Such modifications in root system architecture involve changes in the abundance of reactive oxygen species (ROS) in the apoplast and in cell wall (CW) composition. The hybrid proline‐rich proteins (HyPRPs) gene family in higher plants is considered important in the regulation of CW structure. However, the functions of HyPRPs remain to be characterized. We therefore analysed the functions of OsR3L1 (Os04g0554500) in rice. qRT‐PCR and GUS staining revealed that OsR3L1 is expressed in roots. While the r3l1 mutants had a defective root system with fewer adventitious roots (ARs) and lateral roots (LRs) than the wild type, lines overexpressing OsR3L1 (R3L1‐OE) showed more extensive LR formation but with a shorter root length. The expression of OsR3L1 was initiated by the OsMADS25 transcription factor. Moreover, the abundance of OsR3L1 transcripts was increased by NaCl. The R3L1‐OE‐3 line exhibited enhanced salt tolerance, whereas the r3l1–2 mutant showed greater salt sensitivity. The addition of H2O2 increased the levels of OsR3L1 transcripts. Data are presented indicating that OsR3L1 modulates H2O2 accumulation in the apoplast. We conclude that OsR3L1 regulates salt tolerance through regulation of peroxidases and apoplastic H2O2 metabolism.

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The role of plant root systems in evolutionary adaptation

Cited by 30 publications

References 124 publications

Salt Stress Promotes Abscisic Acid Accumulation to Affect Cell Proliferation and Expansion of Primary Roots in Rice

Salt Stress Promotes Abscisic Acid Accumulation to Affect Cell Proliferation and Expansion of Primary Roots in Rice

Class III Peroxidases in Response to Multiple Abiotic Stresses in Arabidopsis thaliana Pyrenean Populations

OsHyPRP06/R3L1 regulates root system development and salt tolerance via apoplastic ROS homeostasis in rice (Oryza sativa L.)

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