Indole-3-butyric acid synthesis in ecotypes and mutants of Arabidopsis thaliana under different growth conditions

Ludwig‐Müller, Jutta

doi:10.1016/j.jplph.2005.10.008

Cited by 33 publications

(21 citation statements)

References 61 publications

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“…Earlier investigations revealed that the metabolism and conjugation of IAA in plant tissue was more rapid than that of IBA (Novickienė and Merkys, 1998). It was shown that IBA induced adventitious roots on sterile-grown stem sections of Arabidopsis at concentrations where IAA was still ineffective (Ludwig-Müller, 2007). IBA was also more effective in promoting LR at lower concentrations compared to IAA in Arabidopsis (Zolman et al, 2000).…”

Section: Discussionmentioning

confidence: 99%

“…The role of physiologically active auxin analogues, especially 3-indolylbutyric acid (IBA), in LR induction and development, and in processes involved in the formation of root system architecture is also little known. It is becoming clear that besides the classical auxin IAA, other auxin-like substances, such as IBA, exist in plants (LudwigMüller, 2000;2007). At lower concentrations IBA was also more effective than IAA in promoting lateral root growth in Arabidopsis (Zolman et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

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Analysis of lateral root growth in Arabidopsis in response to physiologically active auxin analogues

Novickienė¹,

Gavelienė²,

Miliuvienė³

et al. 2010

Acta Agronomica Hungarica

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The aim of this work was to investigate the formation and development of lateral roots in model trials on Arabidopsis thaliana L. Heynh wild type (Col-0), the alf4-1 mutant and its allele by applying the physiologically active auxin analogues IBA, IAA, TA-12 and TA-14.Differences were observed between the alf4-1 mutant and its allele phenotype in the formation of lateral roots. The application of auxin analogues was unable to restore the formation of lateral roots in the alf4-1 mutant. In some cases, under the impact of IBA (1 µM), a cluster of xylem cells was activated in the pericycle of the primary roots and lateral root primordia were formed. The auxin analogues induced the growth of primary roots in the alf4-1 allele and the formation and growth of lateral roots. The impact of IBA (1 µM), TA-12 (1 mM) and IAA (1 µM) was particularly evident. The intense formation of lateral roots under the impact of IBA and TA-12 could be related with the ability of these compounds to intensify mitotic activity in the apical meristem cells of the lateral roots. New data were obtained, showing that IBA and other physiologically active auxin analogues can modify the root system architecture of the test-plant Arabidopsis.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of lateral root growth in Arabidopsis in response to physiologically active auxin analogues

Novickienė¹,

Gavelienė²,

Miliuvienė³

et al. 2010

Acta Agronomica Hungarica

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“…Drought stress and abscisic acid application enhance indole-3-butyric acid synthesis in maize. Recently, it was revealed that Indole-3-butyric acid synthetase from Arabidopsis is also drought-inducible (Ludwig-Müller, 2007). Experiments with indole-3-yl-acetic acid and ethylene glycol tetra-acetic acid suggested that calcium and auxin participate in signaling mechanisms of drought-induced proline accumulation (Sadiqov et al, 2002).…”

Section: Plant Growth Regulatorsmentioning

confidence: 99%

Plant drought stress: effects, mechanisms and management

Farooq

Wahid

Kobayashi

et al. 2009

Agron. Sustain. Dev.

3,058

1,622

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-Scarcity of water is a severe environmental constraint to plant productivity. Drought-induced loss in crop yield probably exceeds losses from all other causes, since both the severity and duration of the stress are critical. Here, we have reviewed the effects of drought stress on the growth, phenology, water and nutrient relations, photosynthesis, assimilate partitioning, and respiration in plants. This article also describes the mechanism of drought resistance in plants on a morphological, physiological and molecular basis. Various management strategies have been proposed to cope with drought stress. Drought stress reduces leaf size, stem extension and root proliferation, disturbs plant water relations and reduces water-use efficiency. Plants display a variety of physiological and biochemical responses at cellular and whole-organism levels towards prevailing drought stress, thus making it a complex phenomenon. CO 2 assimilation by leaves is reduced mainly by stomatal closure, membrane damage and disturbed activity of various enzymes, especially those of CO 2 fixation and adenosine triphosphate synthesis. Enhanced metabolite flux through the photorespiratory pathway increases the oxidative load on the tissues as both processes generate reactive oxygen species. Injury caused by reactive oxygen species to biological macromolecules under drought stress is among the major deterrents to growth. Plants display a range of mechanisms to withstand drought stress. The major mechanisms include curtailed water loss by increased diffusive resistance, enhanced water uptake with prolific and deep root systems and its efficient use, and smaller and succulent leaves to reduce the transpirational loss. Among the nutrients, potassium ions help in osmotic adjustment; silicon increases root endodermal silicification and improves the cell water balance. Low-molecular-weight osmolytes, including glycinebetaine, proline and other amino acids, organic acids, and polyols, are crucial to sustain cellular functions under drought. Plant growth substances such as salicylic acid, auxins, gibberrellins, cytokinin and abscisic acid modulate the plant responses towards drought. Polyamines, citrulline and several enzymes act as antioxidants and reduce the adverse effects of water deficit. At molecular levels several drought-responsive genes and transcription factors have been identified, such as the dehydration-responsive element-binding gene, aquaporin, late embryogenesis abundant proteins and dehydrins. Plant drought tolerance can be managed by adopting strategies such as mass screening and breeding, marker-assisted selection and exogenous application of hormones and osmoprotectants to seed or growing plants, as well as engineering for drought resistance. drought response / stomatal oscillation / osmoprotectants / hormones / stress proteins / drought management / CO 2

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“…Currently it is unclear if IBA acts as an auxin by itself or if it is a precursor of IAA and thus acts via IAA (Ludwig-Muller 2007, Schlicht et al 2013. Moreover, the existence of IBA in the model plant Arabidopsis has been questioned (Novak et al 2012), although this might simply be a question of extraction and detection methods.…”

Section: Novel Roles For Abc Transporters In Iba Transport?mentioning

confidence: 99%

A Critical View on ABC Transporters and Their Interacting Partners in Auxin Transport

Geisler

Aryal

Donato

et al. 2017

Plant and Cell Physiology

135

117

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Different subclasses of ATP-binding cassette (ABC) transporters have been implicated in the transport of native variants of the phytohormone auxin. Here, the putative, individual roles of key members belonging to the ABCB, ABCD and ABCG families, respectively, are highlighted and the knowledge of their assumed expression and transport routes is reviewed and compared with their mutant phenotypes. Protein-protein interactions between ABC transporters and regulatory components during auxin transport are summarized and their importance is critically discussed. There is a focus on the functional interaction between members of the ABCB family and the FKBP42, TWISTED DWARF1, acting as a chaperone during plasma membrane trafficking of ABCBs. Further, the mode and relevance of functional ABCB-PIN interactions is diagnostically re-evaluated. A new nomenclature describing precisely the most likely ABCB-PIN interaction scenarios is suggested. Finally, available tools for the detection and prediction of ABC transporter interactomes are summarized and the potential of future ABC transporter interactome maps is highlighted.

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Indole-3-butyric acid synthesis in ecotypes and mutants of Arabidopsis thaliana under different growth conditions

Cited by 33 publications

References 61 publications

Analysis of lateral root growth in Arabidopsis in response to physiologically active auxin analogues

Analysis of lateral root growth in Arabidopsis in response to physiologically active auxin analogues

Plant drought stress: effects, mechanisms and management

A Critical View on ABC Transporters and Their Interacting Partners in Auxin Transport

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