Phosphate Uptake and Allocation – A Closer Look at Arabidopsis thaliana L. and Oryza sativa L.

Młodzińska, Ewa; Zboińska, Magdalena

doi:10.3389/fpls.2016.01198

Cited by 135 publications

(73 citation statements)

References 206 publications

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“…Additionally, the plants tested in the previous study were younger and thus potentially at a different growth stage to the plants used in this study. Phosphate starvation triggers the mobilisation of phosphate from older leaves to sink organs (Młodzińska & Zboińska ), and it is possible that this mobile phosphate modulates the need for phosphate uptake. Signalling by root‐produced miR399* and miR399 to the shoots in older plants may occur as a result of this effect, in order to better communicate the need for phosphate uptake by the roots.…”

Section: Discussionmentioning

confidence: 99%

Long‐distance movement of phosphate starvation‐responsive microRNAs in Arabidopsis

Huen

Rodríguez-Medina

et al. 2017

Plant Biol J

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Plant microRNAs are small RNAs that are important for genetic regulation of processes such as plant development or environmental responses. Specific microRNAs accumulate in the phloem during phosphate starvation, and may act as long-distance signalling molecules. We performed quantitative PCR on Arabidopsis hypocotyl micrograft tissues of wild-type and hen1-6 mutants to assess the mobility of several phosphate starvation-responsive microRNA species. In addition to the previously confirmed mobile species miR399d, the corresponding microRNA* (miR399d*) was identified for the first time as mobile between shoots and roots. Translocation by phosphate-responsive microRNAs miR827 and miR2111a between shoots and roots during phosphate starvation was evident, while their respective microRNA*s were not mobile. The results suggest that long-distance mobility of microRNA species is selective and can occur without the corresponding duplex strand. Movement of miR399d* and root-localised accumulation of miR2111a* opens the potential for persisting microRNA*s to be mobile and functional in novel pathways during phosphate starvation responses.

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Section: Discussionmentioning

confidence: 99%

Long‐distance movement of phosphate starvation‐responsive microRNAs in Arabidopsis

Huen

Rodríguez-Medina

et al. 2017

Plant Biol J

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“…Phosphate uptake and allocation are tightly regulated in plants with highly efficient Pi remobilization (Nagarajan et al, 2011;Nussaume et al, 2011). In rice, studies have shown that several PHT family transporters are involved in redistributing Pi from older leaves to younger tissues (Młodzińska and Zboińska, 2016). Further work should examine whether these PHT transporter genes are posttranscriptionally regulated by rice SR40 and SCL57.…”

Section: Sr Proteins Play Key Roles In Regulating Mineral Homeostasismentioning

confidence: 99%

Alternative Splicing Plays a Critical Role in Maintaining Mineral Nutrient Homeostasis in Rice (Oryza sativa)

et al. 2018

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Alternative splicing (AS) of pre-mRNAs promotes transcriptome and proteome diversity and plays important roles in a wide range of biological processes. However, the role of AS in maintaining mineral nutrient homeostasis in plants is largely unknown. To clarify this role, we obtained whole transcriptome RNA sequencing data from rice (Oryza sativa) roots grown in the presence or absence of several mineral nutrients (Fe, Zn, Cu, Mn, and P). Our systematic analysis revealed 13,291 alternatively spliced genes, representing ∼53.3% of the multiexon genes in the rice genome. As the overlap between differentially expressed genes and differentially alternatively spliced genes is small, a molecular understanding of the plant's response to mineral deficiency is limited by analyzing differentially expressed genes alone. We found that the targets of AS are highly nutrient-specific. To verify the role of AS in mineral nutrition, we characterized mutants in genes encoding Ser/Arg (SR) proteins that function in AS. We identified several SR proteins as critical regulators of Zn, Mn, and P nutrition and showed that three SR protein-encoding genes regulate P uptake and remobilization between leaves and shoots of rice, demonstrating that AS has a key role in regulating mineral nutrient homeostasis in rice.

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“…Plants acquire phosphorus in the inorganic form (Pi) by high affinity transporters (PHTs) and Pi/H + symporters (Mlodzinska and Zboinska, 2016). In Arabidopsis , PHT gene family is divided into four groups (PHT1, PHT2, PHT3, and PHT4) are involved in different functions.…”

Section: Phosphorus (P)mentioning

confidence: 99%

Involvement of Small RNAs in Phosphorus and Sulfur Sensing, Signaling and Stress: Current Update

2017

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Plants require several essential mineral nutrients for their growth and development. These nutrients are required to maintain physiological processes and structural integrity in plants. The root architecture has evolved to absorb nutrients from soil and transport them to other parts of the plant. Nutrient deficiency affects several physiological and biological processes in plants and leads to reduction in crop productivity and yield. To compensate this adversity, plants have developed adaptive mechanisms to enhance the acquisition, conservation, and mobilization of these nutrients under deficient or adverse conditions. In addition, plants have evolved an intricate nexus of complex signaling cascades, which help in nutrient sensing and uptake as well as to maintain nutrient homeostasis. In recent years, small non-coding RNAs such as micro RNAs (miRNAs) and endogenous small interfering RNAs have emerged as important component in regulating plant stress responses. A set of these small RNAs (sRNAs) have been implicated in regulating various processes involved in nutrient uptake, assimilation, and deficiency. In response to phosphorus (P) and sulphur (S) deficiencies, role of sRNAs, miR395 and miR399, have been identified to be instrumental; however, many more miRNAs might be involved in regulating the plant response to these nutrient stresses. These sRNAs modulate expression of target genes in response to P and S deficiencies and regulate their uptake and utilization for proper growth and development of the plant. This review summarizes the current understanding of uptake, sensing, and signaling of P and S and highlights the regulatory role of sRNAs in adaptive responses to these nutrient stresses in plants.

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Phosphate Uptake and Allocation – A Closer Look at Arabidopsis thaliana L. and Oryza sativa L.

Cited by 135 publications

References 206 publications

Long‐distance movement of phosphate starvation‐responsive microRNAs in Arabidopsis

Long‐distance movement of phosphate starvation‐responsive microRNAs in Arabidopsis

Alternative Splicing Plays a Critical Role in Maintaining Mineral Nutrient Homeostasis in Rice (Oryza sativa)

Involvement of Small RNAs in Phosphorus and Sulfur Sensing, Signaling and Stress: Current Update

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