SPX1 is an important component in the phosphorus signalling network of common bean regulating root growth and phosphorus homeostasis

Yao, Zhufang; Liang, Chaojie; Zhang, Qing; Chen, Zhijian; Xiao, Bi-Xian; Tian, Jichun; Liao, Hong

doi:10.1093/jxb/eru183

Cited by 54 publications

(36 citation statements)

References 52 publications

(106 reference statements)

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“…Furthermore, overexpression of GmEXPB2 , a soybean β‐expansin gene, significantly promoted root elongation and subsequent increased plant growth and P uptake under low P growth conditions (Guo et al ). Finally, overexpression of a common bean gene, PvSPX1 , resulted in increased root P accumulation and modified morphology of transgenic bean hairy roots (Yao et al ).…”

Section: Molecular Mechanisms Of Root Architecture Modification Relatmentioning

confidence: 99%

Improving crop nutrient efficiency through root architecture modifications

Zeng

Liao

2015

JIPB

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208

121

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Improving crop nutrient efficiency becomes an essential consideration for environmentally friendly and sustainable agriculture. Plant growth and development is dependent on 17 essential nutrient elements, among them, nitrogen (N) and phosphorus (P) are the two most important mineral nutrients. Hence it is not surprising that low N and/or low P availability in soils severely constrains crop growth and productivity, and thereby have become high priority targets for improving nutrient efficiency in crops. Root exploration largely determines the ability of plants to acquire mineral nutrients from soils. Therefore, root architecture, the 3-dimensional configuration of the plant's root system in the soil, is of great importance for improving crop nutrient efficiency. Furthermore, the symbiotic associations between host plants and arbuscular mycorrhiza fungi/rhizobial bacteria, are additional important strategies to enhance nutrient acquisition. In this review, we summarize the recent advances in the current understanding of crop species control of root architecture alterations in response to nutrient availability and root/microbe symbioses, through gene or QTL regulation, which results in enhanced nutrient acquisition.

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Section: Molecular Mechanisms Of Root Architecture Modification Relatmentioning

confidence: 99%

Improving crop nutrient efficiency through root architecture modifications

Zeng

Liao

2015

JIPB

Self Cite

208

121

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“…In recent years, many Pi starvation responsive genes and proteins have been identified and functionally characterized, which has filled in large gaps in our sketch of plant Pi signaling and regulatory networks [ 5 , 9 , 11 ]. In the center of the Pi signaling network lie several important regulators, such as phosphate starvation response 1 ( PHR1 ) and WRKY transcription factors, proteins containing the SYG1/PHO81/XPR1 domain (SPX), and the ubiquitin-like modifier E3 ligase [ 20 , 21 , 22 , 23 , 24 , 25 ]. Downstream responses include a set of genes directly involved in morphological and physiological responses to Pi starvation, such as purple acid phosphatase ( PAP ) genes functioning in extracellular organic P remobilization, phosphate transporter ( Pht ) genes involved in Pi acquisition, and expansin ( EXP ) genes that participate in alteration of root morphology and architecture [ 26 , 27 , 28 , 29 , 30 ].…”

Section: Introductionmentioning

confidence: 99%

Genome Wide Transcriptome Analysis Reveals Complex Regulatory Mechanisms Underlying Phosphate Homeostasis in Soybean Nodules

Xue

Zhuang

Zhu

et al. 2018

IJMS

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Phosphorus (P) deficiency is a major limitation for legume crop production. Although overall adaptations of plant roots to P deficiency have been extensively studied, only fragmentary information is available in regard to root nodule responses to P deficiency. In this study, genome wide transcriptome analysis was conducted using RNA-seq analysis in soybean nodules grown under P-sufficient (500 μM KH2PO4) and P-deficient (25 μM KH2PO4) conditions to investigate molecular mechanisms underlying soybean (Glycine max) nodule adaptation to phosphate (Pi) starvation. Phosphorus deficiency significantly decreased soybean nodule growth and nitrogenase activity. Nodule Pi concentrations declined by 49% in response to P deficiency, but this was well below the 87% and 88% decreases observed in shoots and roots, respectively. Nodule transcript profiling revealed that a total of 2055 genes exhibited differential expression patterns between Pi sufficient and deficient conditions. A set of (differentially expressed genes) DEGs appeared to be involved in maintaining Pi homeostasis in soybean nodules, including eight Pi transporters (PTs), eight genes coding proteins containing the SYG1/PHO81/XPR1 domain (SPXs), and 16 purple acid phosphatases (PAPs). The results suggest that a complex transcriptional regulatory network participates in soybean nodule adaption to Pi starvation, most notable a Pi signaling pathway, are involved in maintaining Pi homeostasis in nodules.

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“…Considerable information has been gathered on the components of the Pi starvation signaling pathway that has been well reviewed in the past decade (Chiou and Lin, 2011; Wu et al, 2013; Zhang et al, 2014; Baker et al, 2015); increasing studies have established the importance of SPX domain-containing proteins in Pi homeostasis and Pi signaling. To date, the identification and characterization of SPX members has been completed in many plant species including Arabidopsis (Duan et al, 2008), soybeans (Yao et al, 2014a), common beans (Yao et al, 2014b), and rice (Wang et al, 2009, 2014; Liu et al, 2010; Shi et al, 2014). …”

Section: Introductionmentioning

confidence: 99%

Genome-Wide Identification and Characterization of SPX Domain-Containing Members and Their Responses to Phosphate Deficiency in Brassica napus

Yang

Ding

et al. 2017

Front. Plant Sci.

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The importance of SPX domain-encoding proteins to phosphate (Pi) homeostasis and signaling pathways has been well-documented in rice and Arabidopsis. However, global information and responses of SPX members to P stress in allotetraploid Brassica napus, one of the world’s major oil crops that is sensitive to P deficiency, remain undefined. We identified a total of 69 SPX domain-containing genes in the B. napus genome. Based on the domain organizations, these genes were classified into four distinct subfamilies—SPX (11), SPX-EXS (43), SPX-MFS (8), and SPX-RING (7)—that represented clear orthologous relationships to their family members in Arabidopsis. A cis-element analysis indicated that 2 ∼ 4 P1BS elements were enriched in the promoter of SPX subfamily genes except BnaSPX4s. RNA-Seq analysis showed that BnaSPX genes were differentially expressed in response to Pi deficiency. Furthermore, quantitative real-time reverse transcription PCR revealed that nine SPX subfamily genes were significantly induced by Pi starvation and recovered rapidly after Pi refeeding. A functional analysis of two paralogous BnaSPX1 genes in transgenic Arabidopsis indicated their functional divergence during long-term evolution. This comprehensive study on the abundance, molecular characterization and responses to Pi deficiency of BnaSPX genes provides insights into the structural and functional diversities of these family members in B. napus and provides a solid foundation for future functional studies of BnaSPX genes.Highlight: The genome-wide identification and characterization of SPX genes in B. napus and their responses to Pi deficiency provide comprehensive insights into the structural and functional diversities of the family members in B. napus and their potential in Pi homeostasis and signaling responsiveness to Pi stress.

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SPX1 is an important component in the phosphorus signalling network of common bean regulating root growth and phosphorus homeostasis

Abstract: SummaryPvSPX1 was found to be a positive regulator in the P signalling network of common bean, and is downstream of PvPHR1.

Cited by 54 publications

References 52 publications

Improving crop nutrient efficiency through root architecture modifications

Improving crop nutrient efficiency through root architecture modifications

Genome Wide Transcriptome Analysis Reveals Complex Regulatory Mechanisms Underlying Phosphate Homeostasis in Soybean Nodules

Genome-Wide Identification and Characterization of SPX Domain-Containing Members and Their Responses to Phosphate Deficiency in Brassica napus

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