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Auxin signaling gets oxidative to promote root hair growth

Molecular Plant 2024年第5期17卷 696-698页

作者： Victoria Berdion Gabarain Miguel A.Ibeas Hernan Salinas-Grenet Jose M.Estevez Fundación Instituto Leloir&IIBBA-CONICET Av.Patricias Argentinas 435Buenos Aires C1405BWEArgentina Centro de Biotecnología Vegetal Facultad de Ciencias de la VidaUniversidad Andres BelloSantiagoChile anid Millennium Science Initiative ProgramMillennium Nucleus for the Development of Super Adaptable Plants(MN-SAP)SantiagoChile anid Millennium Science Initiative ProgramMillennium Institute for Integrative Biology(iBio)SantiagoChile

Root hairs(RHs)emerge as cylindrical cell protrusions from the root epidermis in a polar manner,and these outgrows increase the rhizosphere space to acquire water and nutrients,anchor the plant,and interact with various soil microorganisms.Auxin is one of the key hormones to promote RH growth,and high levels of auxin are directly promoted by low levels of macronutrients in the soil,such as phosphate(Bhosale et al.,2018)and nitrates(Jia et al.,2023).The nutritional signals for roots,which rapidly change in both time and place within the soil,are tightly linked to signaling pathways that execute swifts on cellular processes to adjust to a challenging environment.Plant rapid alkalinization factors(RALFs)are peptides that are released outside the cell and act as peptide-hormone signals.They attach to the extracellular domains of members of the Catharanthus roseus RECEPTOR-LIKE KINASE 1-LIKE family,specifically FERONIA(FER)in conjunction with its co-receptor LORELEI-LIKE-GPIANCHORED PROTEIN 1.

关键词： soil outside alkali

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Two titans fin ally meet each other under nitrogen deficiencies:FERONIA-TORC1 activation promotes plant growth

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Molecular Plant 2022年第7期15卷 1095-1097页

作者： Javier Martinez Pacheco Jose M.Estevez Fundación Instituto Leloir and IIBBA-CONICET.Av.Patricias Argentinas 435 Buenos Aires C1405BWEArgentina Centro de Biotecnología Vegetal Facultad de Ciencias de la VidaUniversidad Andres BelloSantiagoChile anid-Millennium Science Initiative Program-Millennium Nucleus for the Development of Super Adaptable Plants(MN-SAP) SantiagoChile

Plant growth is determined by well-defined developmental processes that integrate cell-intrinsic factors and external environmental cues,and it is largely dependent on the assimilation of macro-and micro-nutrients from the environment.Between the macro-nutrients,the inorganic nitrogen(e.g.,nitrate and ammonium)and amino acids are essential for plant survival and productivity.Beyond acting as macro-nutrients and structural components of macro-molecules,these nitrogen-containing molecules could also act as signaling molecules to orchestrate diverse genetic programs(Wang et al.,2018).

关键词： activation inorganic nitrate

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The tip of the iceberg:ROP2 directly interacts with SYP121 to regulate root-hair polarization,elongation,and exocytosis

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Molecular Plant 2022年第7期15卷 1084-1086页

作者： Martiniano M.Ricardi Jose M.Estevez Instituto de Fisiología Biología Molecular y Neurociencias(IFIBYNE-UBA-CONICET)and Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresCiudad UniversitariaBuenos Aires C1428EHAArgentina Fundación Instituto Leloir and IIBBA-CONICET.Av.Patricias Argentinas 435 Buenos Aires C1405BWEArgentina Centro de Biotecnología Vegetal Facultad de Ciencias de la VidaUniversidad Andres BelloSantiago 8370146Chile anid-Millennium Science Initiative Program-Millennium Nucleus for the Development of Super Adaptable Plants(MN-SAP) Santiago 8370146Chile

Root hairs(RHs)grow in a polar manner as cylindrical protrusions from the root epidermis.They significantly expand the root volume in the rhizosphere to search for water and nutrients,anchor the plant,and promote interactions with several kinds of microorganisms in the soil.Trichoblasts,the epidermis cell type responsible for RH development,switch from anisotropic cell elongation to tip growth through polarization of the growth machinery to a predefined RH initiation domain(RHID)at the plasma membrane.

关键词： tip polarization cylindrical

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