Strigolactones regulate shoot elongation by mediating gibberellin metabolism and signaling in rice (Oryza sativa L.)

Zou, Xiao; Wang, Qi; Chen, Peisai; Yin, Changxi; Lin, Yongjun

doi:10.1016/j.jplph.2019.04.003

Cited by 25 publications

(14 citation statements)

References 55 publications

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“…SLs strongly interact with auxin signaling to regulate secondary growth, and play a positive role in the pathway downstream of auxin. For example, the positive effect of auxin on cambium was reduced in the max mutants [115]. Altogether, auxin, as a major regulator of the synthesis of SLs, antagonizes the function of SLs by enhancing the transport of auxin [165][166][167].…”

Section: Sl or Kar Crosstalk With Auxinmentioning

confidence: 96%

“…SL promotes stem secondary growth by affecting cambial cell division and inducing specific genes. For instance, expression of the MAX2 gene under a cambium-specific (WOX4) promoter could restore the secondary growth defect of the max2 mutant [115]. More recently, a study reported that SL is required for shoot elongation by its mediation of gibberellin metabolism and signaling in rice [116].…”

Section: Shoot Branchingmentioning

confidence: 99%

“…At the same time, it also leads to the accumulation of auxin in the cells of the primary root meristem, which promotes the growth of the taproot, mainly due to an increase in cell length and a decrease in cell diameter [33]. Furthermore, auxin is involved in the regulation of secondary growth and root hair elongation both upstream and downstream of SL, respectively [115,162].…”

Section: Sl or Kar Crosstalk With Auxinmentioning

confidence: 99%

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Comparing and Contrasting the Multiple Roles of Butenolide Plant Growth Regulators: Strigolactones and Karrikins in Plant Development and Adaptation to Abiotic Stresses

Tao

Lian

Wang

2019

IJMS

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Strigolactones (SLs) and karrikins (KARs) are both butenolide molecules that play essential roles in plant growth and development. SLs are phytohormones, with SLs having known functions within the plant they are produced in, while KARs are found in smoke emitted from burning plant matter and affect seeds and seedlings in areas of wildfire. It has been suggested that SL and KAR signaling may share similar mechanisms. The α/β hydrolases DWARF14 (D14) and KARRIKIN INSENSITIVE 2 (KAI2), which act as receptors of SL and KAR, respectively, both interact with the F-box protein MORE AXILLARY GROWTH 2 (MAX2) in order to target SUPPRESSOR OF MAX2 1 (SMAX1)-LIKE/D53 family members for degradation via the 26S proteasome. Recent reports suggest that SLs and/or KARs are also involved in regulating plant responses and adaptation to various abiotic stresses, particularly nutrient deficiency, drought, salinity, and chilling. There is also crosstalk with other hormone signaling pathways, including auxin, gibberellic acid (GA), abscisic acid (ABA), cytokinin (CK), and ethylene (ET), under normal and abiotic stress conditions. This review briefly covers the biosynthetic and signaling pathways of SLs and KARs, compares their functions in plant growth and development, and reviews the effects of any crosstalk between SLs or KARs and other plant hormones at various stages of plant development. We also focus on the distinct responses, adaptations, and regulatory mechanisms related to SLs and/or KARs in response to various abiotic stresses. The review closes with discussion on ways to gain additional insights into the SL and KAR pathways and the crosstalk between these related phytohormones.factors through interactions between the phytohormone regulatory networks via the perception and signal transduction originating at various receptors [20][21][22][23].Strigolactones (SLs) were originally isolated from root exudates of cotton and as seed germination stimulants from plants in the Orobanchaceae family that parasitize plant roots (Striga, Phelipanche, and Orobanche spp.) [24][25][26]. SLs normally control seed germination and seedling development [27], shoot branching [28-32], root architecture [33], and leaf senescence [34]. SLs also promote beneficial symbiotic relationships between host plants and mycorrhizal fungi [35,36]. The biosynthesis and signaling of SLs are regulated by various abiotic stress factors [37][38][39][40], including the recently reported SL involvement in responding to nutrient deprivation, drought, chilling and salinity [38,[40][41][42][43][44][45][46][47][48][49][50]. Such studies provide new insights into the novel roles SL signaling plays in the regulation of plant adaptation to adverse environmental conditions [51][52][53][54].Karrikins (KARs) are found in smoke released from the heating or combustion of plant material, after which they can stimulate the germination of dormant seeds [55][56][57][58]. KARs are also involved in the inhibition of hypocotyl elongation and in the promotion of cotyledon expansion and...

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Section: Sl or Kar Crosstalk With Auxinmentioning

confidence: 96%

Section: Shoot Branchingmentioning

confidence: 99%

Section: Sl or Kar Crosstalk With Auxinmentioning

confidence: 99%

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Comparing and Contrasting the Multiple Roles of Butenolide Plant Growth Regulators: Strigolactones and Karrikins in Plant Development and Adaptation to Abiotic Stresses

Tao

Lian

Wang

2019

IJMS

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“…Several studies have proposed a number of quantitative trait loci (QTLs) controlling tiller number in rice, and mapped to almost all rice chromosomes (10–11) using different sorts of mapping populations, including doubled haploid (DH) lines [ 27 ]. Many genes have been identified; however, only a few genes have been cloned and functionally characterized [ 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 ]. A mapping population derived from a cross between indica and japonica would offer the best cross combination to investigate QTLs associated with rice plant architecture, due to the morphological difference between indica and japonica subspecies.…”

Section: Introductionmentioning

confidence: 99%

Novel QTL Associated with Shoot Branching Identified in Doubled Haploid Rice (Oryza sativa L.) under Low Nitrogen Cultivation

Kwon

Kabange

Lee

et al. 2021

Genes

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Shoot branching is considered as an important trait for the architecture of plants and contributes to their growth and productivity. In cereal crops, such as rice, shoot branching is controlled by many factors, including phytohormones signaling networks, operating either in synergy or antagonizing each other. In rice, shoot branching indicates the ability to produce more tillers that are essential for achieving high productivity and yield potential. In the present study, we evaluated the growth and development, and yield components of a doubled haploid population derived from a cross between 93-11 (P1, indica) and Milyang352 (P2, japonica), grown under normal nitrogen and low nitrogen cultivation open field conditions. The results of the phenotypic evaluation indicated that parental lines 93-11 (P1, a high tillering indica cultivar) and Milyang352 (P2, a low tillering japonica cultivar) showed distinctive phenotypic responses, also reflected in their derived population. In addition, the linkage mapping and quantitative trait locus (QTL) analysis detected three QTLs associated with tiller number on chromosome 2 (qTNN2-1, 130 cM, logarithm of the odds (LOD) 4.14, PVE 14.5%; and qTNL2-1, 134 cM, LOD: 6.05, PVE: 20.5%) and chromosome 4 (qTN4-1, 134 cM, LOD 3.92, PVE 14.5%), with qTNL2-1 having the highest phenotypic variation explained, and the only QTL associated with tiller number under low nitrogen cultivation conditions, using Kompetitive Allele-Specific PCR (KASP) and Fluidigm markers. The additive effect (1.81) of qTNL2-1 indicates that the allele from 93-11 (P1) contributed to the observed phenotypic variation for tiller number under low nitrogen cultivation. The breakthrough is that the majority of the candidate genes harbored by the QTLs qTNL2-1 and qTNN4-1 (here associated with the control of shoot branching under low and normal nitrogen cultivation, respectively), were also proposed to be involved in plant stress signaling or response mechanisms, with regard to their annotations and previous reports. Therefore, put together, these results would suggest that a possible crosstalk exists between the control of plant growth and development and the stress response in rice.

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“…In recent years, amounts of genes related to plant height have been characterized and identi ed in rice, where most of them are involved in plant hormone metabolism and signal transduction, such as gibberellin (GA), brassinolide (BR), strigolactone (SL) and abscisic acid (ABA) (Zou et al 2019;Zhang et al 2020a). The OsKO2 gene encodes a kaurene oxidase that catalyzes the early steps of GA biosynthesis.…”

Section: Introductionmentioning

confidence: 99%

The miR528-D3 module regulates plant height in rice by modulating the gibberellin and abscisic acid metabolisms

Liu¹,

Zhao²,

Wang³

et al. 2021

Preprint

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Background Plant height, as one of the important agronomic traits of rice, is closely related to yield. In recent years, plant height-related genes have been characterized and identified, among which the D3 gene is one of the target genes of miR528, and regulates rice plant height and tillering mainly by affecting strigolactone (SL) signal transduction. However, it remains unknown whether the miR528 and D3 interaction functions in controlling plant height, and the underlying regulatory mechanism in rice. Results In this study, we found that the plant height, internode length, and cell length of internodes of d3 mutants and miR528-overexpressing (OE-miR528) lines were greatly shorter than WT, D3-overexpressing (OE-D3), and miR528 target mimicry (OE-MIM528) transgenic plants. Knockout of D3 gene (d3 mutants) or miR528-overexpressing (OE-miR528) triggers a substantial reduction of gibberellin (GA) content, but a significant increase of abscisic acid (ABA) accumulation than in WT. The d3 and OE-miR528 transgenic plants were much more sensitive to GA, but less sensitive to ABA than WT. Moreover, the expression level of GA biosynthesis-related key genes, including OsCPS1, OsCPS2, OsKO2 and OsKAO was remarkably higher in OE-D3 plants, while the NECD2 expression, a key gene involved in ABA biosynthesis, was significantly higher in d3 mutants than in WT and OE-D3 plants. Conclusion The results indicate that the miR528-D3 module negatively regulates plant height in rice by modulating the GA and ABA homeostasis, thereby further affecting the elongation of internodes, and resulting in lower plant height, which adds a new regulatory role to the D3-mediated plant height controlling in rice.

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Strigolactones regulate shoot elongation by mediating gibberellin metabolism and signaling in rice (Oryza sativa L.)

Cited by 25 publications

References 55 publications

Comparing and Contrasting the Multiple Roles of Butenolide Plant Growth Regulators: Strigolactones and Karrikins in Plant Development and Adaptation to Abiotic Stresses

Comparing and Contrasting the Multiple Roles of Butenolide Plant Growth Regulators: Strigolactones and Karrikins in Plant Development and Adaptation to Abiotic Stresses

Novel QTL Associated with Shoot Branching Identified in Doubled Haploid Rice (Oryza sativa L.) under Low Nitrogen Cultivation

The miR528-D3 module regulates plant height in rice by modulating the gibberellin and abscisic acid metabolisms

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