EXO modifies sucrose and trehalose responses and connects the extracellular carbon status to growth
Plants have the capacity to adapt growth to changing environmental conditions. This implies the modulation of metabolism according to the availability of carbon (C). Particular interest in the response to the C availability is based on the increasing atmospheric levels of CO2. Several regulatory pat...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2013-06-01
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| Series: | Frontiers in Plant Science |
| Subjects: | |
| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fpls.2013.00219/full |
| _version_ | 1818681282938273792 |
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| author | Janina eLisso Florian eSchröder Carsten eMüssig |
| author_facet | Janina eLisso Florian eSchröder Carsten eMüssig |
| author_sort | Janina eLisso |
| collection | DOAJ |
| description | Plants have the capacity to adapt growth to changing environmental conditions. This implies the modulation of metabolism according to the availability of carbon (C). Particular interest in the response to the C availability is based on the increasing atmospheric levels of CO2. Several regulatory pathways that link the C status to growth have emerged. The extracellular EXO protein is essential for cell expansion and promotes shoot and root growth. Homologous proteins were identified in evolutionarily distant green plants. We show here that the EXO protein connects growth with C responses. The exo mutant displayed altered responses to exogenous sucrose supplemented to the growth medium. Impaired growth of the mutant in synthetic medium was associated with the accumulation of starch and anthocyanins, altered expression of sugar-responsive genes, and increased abscisic acid levels. Thus, EXO modulates several responses related to the C availability. Growth retardation on medium supplemented with 2-deoxy-glucose, mannose, and palatinose was similar to the wild type. Trehalose feeding stimulated root growth and shoot biomass production of exo plants whereas it inhibited growth of the wild type. The phenotypic features of the exo mutant suggest that apoplastic processes coordinate growth and C responses. |
| first_indexed | 2024-12-17T10:00:29Z |
| format | Article |
| id | doaj.art-bebd082cc028430ab65072383b905088 |
| institution | Directory Open Access Journal |
| issn | 1664-462X |
| language | English |
| last_indexed | 2024-12-17T10:00:29Z |
| publishDate | 2013-06-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Plant Science |
| spelling | doaj.art-bebd082cc028430ab65072383b9050882022-12-21T21:53:18ZengFrontiers Media S.A.Frontiers in Plant Science1664-462X2013-06-01410.3389/fpls.2013.0021953014EXO modifies sucrose and trehalose responses and connects the extracellular carbon status to growthJanina eLisso0Florian eSchröder1Carsten eMüssig2MPI MPMPI MPUniversiät PotsdamPlants have the capacity to adapt growth to changing environmental conditions. This implies the modulation of metabolism according to the availability of carbon (C). Particular interest in the response to the C availability is based on the increasing atmospheric levels of CO2. Several regulatory pathways that link the C status to growth have emerged. The extracellular EXO protein is essential for cell expansion and promotes shoot and root growth. Homologous proteins were identified in evolutionarily distant green plants. We show here that the EXO protein connects growth with C responses. The exo mutant displayed altered responses to exogenous sucrose supplemented to the growth medium. Impaired growth of the mutant in synthetic medium was associated with the accumulation of starch and anthocyanins, altered expression of sugar-responsive genes, and increased abscisic acid levels. Thus, EXO modulates several responses related to the C availability. Growth retardation on medium supplemented with 2-deoxy-glucose, mannose, and palatinose was similar to the wild type. Trehalose feeding stimulated root growth and shoot biomass production of exo plants whereas it inhibited growth of the wild type. The phenotypic features of the exo mutant suggest that apoplastic processes coordinate growth and C responses.http://journal.frontiersin.org/Journal/10.3389/fpls.2013.00219/fullGrowthTrehaloseApoplastsugar responseEXO |
| spellingShingle | Janina eLisso Florian eSchröder Carsten eMüssig EXO modifies sucrose and trehalose responses and connects the extracellular carbon status to growth Frontiers in Plant Science Growth Trehalose Apoplast sugar response EXO |
| title | EXO modifies sucrose and trehalose responses and connects the extracellular carbon status to growth |
| title_full | EXO modifies sucrose and trehalose responses and connects the extracellular carbon status to growth |
| title_fullStr | EXO modifies sucrose and trehalose responses and connects the extracellular carbon status to growth |
| title_full_unstemmed | EXO modifies sucrose and trehalose responses and connects the extracellular carbon status to growth |
| title_short | EXO modifies sucrose and trehalose responses and connects the extracellular carbon status to growth |
| title_sort | exo modifies sucrose and trehalose responses and connects the extracellular carbon status to growth |
| topic | Growth Trehalose Apoplast sugar response EXO |
| url | http://journal.frontiersin.org/Journal/10.3389/fpls.2013.00219/full |
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