WHEN STRESS AND DEVELOPMENT GO HAND IN HAND: MAIN HORMONAL CONTROLS OF ADVENTITIOUS ROOTING IN CUTTINGS
Adventitious rooting (AR) is a multifactorial response leading to new roots at the base of stem cuttings, and the establishment of a complete and autonomous plant. AR has two main phases: a) induction, with a requirement for higher auxin concentration; b) formation, inhibited by high auxin and in wh...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2013-05-01
|
| Series: | Frontiers in Plant Science |
| Subjects: | |
| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fpls.2013.00133/full |
| _version_ | 1818011428644192256 |
|---|---|
| author | Cibele Tesser Da Costa Marcia Rodrigues De Almeida Carolina Michels Ruedell Joseli eSchwambach Felipe Dos Santos Maraschin Arthur Germano Fett-Neto |
| author_facet | Cibele Tesser Da Costa Marcia Rodrigues De Almeida Carolina Michels Ruedell Joseli eSchwambach Felipe Dos Santos Maraschin Arthur Germano Fett-Neto |
| author_sort | Cibele Tesser Da Costa |
| collection | DOAJ |
| description | Adventitious rooting (AR) is a multifactorial response leading to new roots at the base of stem cuttings, and the establishment of a complete and autonomous plant. AR has two main phases: a) induction, with a requirement for higher auxin concentration; b) formation, inhibited by high auxin and in which anatomical changes take place. The first stages of this process in severed organs necessarily include wounding and water stress responses which may trigger hormonal changes that contribute to reprogram target cells that are competent to respond to rooting stimuli. At severance, the roles of jasmonate and abscisic acid are critical for wound response and perhaps sink strength establishment, although their negative roles on the cell cycle may inhibit root induction. Strigolactones may also inhibit AR. A reduced cytokinin concentration in cuttings results from the separation of the root system, whose tips are a relevant source of these root induction inhibitors. The combined increased accumulation of basipetally transported auxins from the shoot apex at the cutting base is often sufficient for AR in easy-to-root species. The role of peroxidases and phenolic compounds in auxin catabolism may be critical at these early stages right after wounding. The events leading to AR strongly depend on mother plant nutritional status, both in terms of minerals and carbohydrates, as well as on sink establishment at cutting bases. Auxins play a central role in AR. Auxin transporters control auxin canalization to target cells. There, auxins act primarily through selective proteolysis and cell wall loosening, via their receptor proteins TIR1 and ABP1. A complex microRNA circuitry is involved in the control of auxin response factors essential for gene expression in AR. After root establishment, new hormonal controls take place, with auxins being required at lower concentrations for root meristem maintenance and cytokinins needed for root tissue differentiation. |
| first_indexed | 2024-04-14T06:07:39Z |
| format | Article |
| id | doaj.art-7ccf552804194d99b0394f472f5e446d |
| institution | Directory Open Access Journal |
| issn | 1664-462X |
| language | English |
| last_indexed | 2024-04-14T06:07:39Z |
| publishDate | 2013-05-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Plant Science |
| spelling | doaj.art-7ccf552804194d99b0394f472f5e446d2022-12-22T02:08:28ZengFrontiers Media S.A.Frontiers in Plant Science1664-462X2013-05-01410.3389/fpls.2013.0013345174WHEN STRESS AND DEVELOPMENT GO HAND IN HAND: MAIN HORMONAL CONTROLS OF ADVENTITIOUS ROOTING IN CUTTINGSCibele Tesser Da Costa0Marcia Rodrigues De Almeida1Carolina Michels Ruedell2Joseli eSchwambach3Felipe Dos Santos Maraschin4Arthur Germano Fett-Neto5Federal University of Rio Grande do Sul (UFRGS)Federal University of Rio Grande do Sul (UFRGS)Federal University of Rio Grande do Sul (UFRGS)University of Caxias do SulFederal University of Rio Grande do Sul (UFRGS)Federal University of Rio Grande do Sul (UFRGS)Adventitious rooting (AR) is a multifactorial response leading to new roots at the base of stem cuttings, and the establishment of a complete and autonomous plant. AR has two main phases: a) induction, with a requirement for higher auxin concentration; b) formation, inhibited by high auxin and in which anatomical changes take place. The first stages of this process in severed organs necessarily include wounding and water stress responses which may trigger hormonal changes that contribute to reprogram target cells that are competent to respond to rooting stimuli. At severance, the roles of jasmonate and abscisic acid are critical for wound response and perhaps sink strength establishment, although their negative roles on the cell cycle may inhibit root induction. Strigolactones may also inhibit AR. A reduced cytokinin concentration in cuttings results from the separation of the root system, whose tips are a relevant source of these root induction inhibitors. The combined increased accumulation of basipetally transported auxins from the shoot apex at the cutting base is often sufficient for AR in easy-to-root species. The role of peroxidases and phenolic compounds in auxin catabolism may be critical at these early stages right after wounding. The events leading to AR strongly depend on mother plant nutritional status, both in terms of minerals and carbohydrates, as well as on sink establishment at cutting bases. Auxins play a central role in AR. Auxin transporters control auxin canalization to target cells. There, auxins act primarily through selective proteolysis and cell wall loosening, via their receptor proteins TIR1 and ABP1. A complex microRNA circuitry is involved in the control of auxin response factors essential for gene expression in AR. After root establishment, new hormonal controls take place, with auxins being required at lower concentrations for root meristem maintenance and cytokinins needed for root tissue differentiation.http://journal.frontiersin.org/Journal/10.3389/fpls.2013.00133/fullauxin transportauxin signal transductionAdventitious rootingregulating factorshormonal interactionsmother plant status |
| spellingShingle | Cibele Tesser Da Costa Marcia Rodrigues De Almeida Carolina Michels Ruedell Joseli eSchwambach Felipe Dos Santos Maraschin Arthur Germano Fett-Neto WHEN STRESS AND DEVELOPMENT GO HAND IN HAND: MAIN HORMONAL CONTROLS OF ADVENTITIOUS ROOTING IN CUTTINGS Frontiers in Plant Science auxin transport auxin signal transduction Adventitious rooting regulating factors hormonal interactions mother plant status |
| title | WHEN STRESS AND DEVELOPMENT GO HAND IN HAND: MAIN HORMONAL CONTROLS OF ADVENTITIOUS ROOTING IN CUTTINGS |
| title_full | WHEN STRESS AND DEVELOPMENT GO HAND IN HAND: MAIN HORMONAL CONTROLS OF ADVENTITIOUS ROOTING IN CUTTINGS |
| title_fullStr | WHEN STRESS AND DEVELOPMENT GO HAND IN HAND: MAIN HORMONAL CONTROLS OF ADVENTITIOUS ROOTING IN CUTTINGS |
| title_full_unstemmed | WHEN STRESS AND DEVELOPMENT GO HAND IN HAND: MAIN HORMONAL CONTROLS OF ADVENTITIOUS ROOTING IN CUTTINGS |
| title_short | WHEN STRESS AND DEVELOPMENT GO HAND IN HAND: MAIN HORMONAL CONTROLS OF ADVENTITIOUS ROOTING IN CUTTINGS |
| title_sort | when stress and development go hand in hand main hormonal controls of adventitious rooting in cuttings |
| topic | auxin transport auxin signal transduction Adventitious rooting regulating factors hormonal interactions mother plant status |
| url | http://journal.frontiersin.org/Journal/10.3389/fpls.2013.00133/full |
| work_keys_str_mv | AT cibeletesserdacosta whenstressanddevelopmentgohandinhandmainhormonalcontrolsofadventitiousrootingincuttings AT marciarodriguesdealmeida whenstressanddevelopmentgohandinhandmainhormonalcontrolsofadventitiousrootingincuttings AT carolinamichelsruedell whenstressanddevelopmentgohandinhandmainhormonalcontrolsofadventitiousrootingincuttings AT joselieschwambach whenstressanddevelopmentgohandinhandmainhormonalcontrolsofadventitiousrootingincuttings AT felipedossantosmaraschin whenstressanddevelopmentgohandinhandmainhormonalcontrolsofadventitiousrootingincuttings AT arthurgermanofettneto whenstressanddevelopmentgohandinhandmainhormonalcontrolsofadventitiousrootingincuttings |