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Loss of two families of SPX domain-containing proteins required for vacuolar polyphosphate accumulation coincides with the transition to phosphate storage in green plants

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Molecular Plant 2021年第5期14卷 838-846页

作者： Long Wang Xianqing Jia Yuxin Zhang Lei Xu Benoit Menand Hongyu Zhao Houqing Zeng liam dolan Yiyong Zhu Keke Yi Key Laboratory of Plant Nutrition and Fertilizers Ministry of Agriculture and Rural AffairsInstitute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081China Jiangsu Provincial Key Lab for Organic Solid Waste Utilization National Engineering Research Center for Organic-based FertilizersJiangsu Collaborative Innovation Center for Solid Organic Waste Resource UtilizationNanjing Agricultural UniversityNanjing 210095China Aix Marseille Univ CEACNRSBIAMLuminy Plant Genetics and Biophysics TeamMarseille 13009France College of Life and Environmental Sciences Hangzhou Normal UniversityHangzhou 311121China Gregor Mendel Institute of Molecular Plant Biology GmbH Dr.Bohr-Gasse 31030 ViennaAustria

Phosphorus is an essential nutrient for *** is stored as inorganic phosphate(Pi)in the vacuoles of land plants but as inorganic polyphosphate(polyP)in chlorophyte *** it is recognized that the SPX-Major Facilitator Superfamily(MFS)and VPE proteins are responsible for Pi influx and efflux,respectively,across the tonoplast in land plants,the mechanisms that underlie polyP homeostasis and the transition of phosphorus storage forms during the evolution of green plants remain *** this study,we showed that CrPTCI,encoding a protein with both SPX and SLC(permease solute carrier 13)domains for Pi transport,and CrVTC4,encoding a protein with both SPX and vacuolar transporter chaperone(VTC)domains for polyP synthesis,are required for vacuolar polyP accumulation in the chlorophyte Chlamydomonas *** analysis showed that the SPX-SLC,SPX-VTC,and SPX-MFS proteins were present in the common ancestor of green plants(Viridiplantae).The SPX-SLC and SPX-VTC proteins are conserved among species that store phosphorus as vacuolar polyP and absent from genomes of plants that store phosphorus as vacuolar *** contrast,SPX-MFS genes are present in the genomes of streptophytes that store phosphorus as Pi in the *** results suggest that loss of SPX-SLC and SPX-VTC genes and functional conservation of SPX-MFS proteins during the evolution of streptophytes accompanied the change from ancestral polyP storage to Pi storage.

关键词： Chlamydomonas polyphosphate SPX-SLC SPX-VTC vacuolar phosphate plant evolution

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A Transcriptome Atlas of Physcomitrella patens Provides Insights into the Evolution and Development of Land Plants

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Molecular Plant 2016年第2期9卷 205-220页

作者： Carlos Ortiz-Ramirez Marcela Hernandez-Coronado Anna Thamm Bruno Catarino Mingyi Wang liam dolan Jose A.Feijo Jorg D. Becker Instituto Gulbenklan de Ciencia Rua da Quinta Grande 6 2780-156 Oeiras Portugal Department of Plant Sciences University of Oxford South Parks Road Oxford OX1 3RB UK Division of Plant Biology The Samuel Roberts Noble Foundation Ardmore OK 73401 USA Department of Cell Biology and Molecular Genetics University of Maryland 0118 BioSclence Research Building College Park MD 20742-5815 USA These authors contributed equally to this article

Identifying the genetic mechanisms that underpin the evolution of new organ and tissue systems is an aim of evolutionary developmental biology. Comparative functional genetic studies between angiosperms and bryophytes can define those genetic changes that were responsible for developmental innovations. Here, we report the generation of a transcriptome atlas covering most phases in the life cycle of the model bryo- phyte Physcomitrella patens, including detailed sporophyte developmental progression. We identified a comprehensive set of sporophyte-specific transcription factors, and found that many of these genes have homologs in angiosperms that function in developmental processes such as flowering and shoot branching. Deletion of the PpTCP5 transcription factor results in development of supernumerary sporangia attached to a single seta, suggesting that it negatively regulates branching in the moss sporophyte. Given that TCP genes repress branching in angiosperms, we suggest that this activity is ancient. Finally, compar- ison of P. patens and Arabidopsis thaliana transcriptomes led us to the identification of a conserved core of transcription factors expressed in tip-growing cells. We identified modifications in the expression patterns of these genes that could account for developmental differences between P. patens tip-growing cells and A. thaliana pollen tubes and root hairs.

关键词： land plant evolution Physcomitrella patens transcriptome atlas TCP branching tip growth

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