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Ludwig‐Müller, Jutta

doi:10.1023/a:1010746806891

Cited by 280 publications

(58 citation statements)

References 89 publications

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“…Of the 2 auxins, exogenous IBA generally resulted in the greatest basal callus formation. As a more potent rhizogenic auxin than IAA (Nordström et al, 1991;Epstein and Ludwig-Müller, 1993;Ludwig-Müller, 2000;George et al, 2008), IBA also resulted in significantly larger mean root diameters when supplied in the absence of kinetin or in the presence of TIBA (which inhibits IAA efflux) (Christie and Leopold, 1965;Geldner et al, 2001). Since auxin stimulates cell growth (George et al, 2008) and retards root elongation (Woodward and Bartel, 2005), these results indicate that the exogenous IBA was converted to IAA in situ, and, at least in the tested clone, it may serve as a source of IAA, as noted for other plant species (Woodward and Bartel, 2005).…”

Section: Discussionmentioning

confidence: 99%

The choice of auxin analogue for in vitro root induction influences post-induction root development in Eucalyptus grandis

Nakhooda¹,

Watt

Mycock³

2014

Turk J Agric For

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Section: Discussionmentioning

confidence: 99%

The choice of auxin analogue for in vitro root induction influences post-induction root development in Eucalyptus grandis

Nakhooda¹,

Watt

Mycock³

2014

Turk J Agric For

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“…Since combination of different auxins resulted in better response in olive which shows difficult rooting (Grigoriadou et al, 2002), this experiment is designed to study the effect of different auxins solely or in combination with each other. Many investigators have reported that IBA has a better effect on promoting adventitious root formation in comparison to IAA (Stephan and Hamzah, 1988;Riov, 1993;De Klerk et al, 1999;Ludwig-Muller, 2000). It is more stable and less sensitive to the auxin degrading enzymes (Nordstrom et al, 1991;Epstein and Ludwig-Muller, 1993;Riov, 1993).…”

Section: Discussionmentioning

confidence: 99%

Micropropagation of GF 677 Rootstock

Aghaye¹,

Yadollahi²

2012

JAS

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The aim of this investigation was to study micropropagation of Almond GF rootstock on in vitro. Explants were cultured in MS medium containing 5 concentrations of 6-Benzylaminoporine (BAP) 0.1, 0.6, 1, 1.5 and 2 mg 1 -1 along with control treatment. Each treatment includes 5 replications. After 5 weeks of culture, the results showed that the number and length of shoots in treatment containing 1 mg 1 -1 BAP was more than the other treatments and control. The number of shoot that was obtained in treatment of 1 mg 1 -1 BAP was 2.98 (Table 1). The lowest number of shoot was 0.4 due to control treatment. For rooting, explants with 3-5 cm length were transferred to different rooting treatments ( Table 2). The results revealed that the best rooting was obtained with treatment 3 mg 1 -1 IBA. Number and length of roots were 2.167 and 11.53, respectively. Also results showed that putting explants in dark for 1 week is more effective than light.

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“…Indole-3-butyric acid (IBA) is a naturally occurring auxin that is converted to the more abundant auxin indole-3-acetic acid (IAA) in several plant species (reviewed in Ref. 16). Because even-but not odd-chain length IAA derivatives have auxin activity (17), the mechanism of this conversion probably parallels fatty acid ␤-oxidation.…”

mentioning

confidence: 99%

chy1, an Arabidopsis Mutant with Impaired β-Oxidation, Is Defective in a Peroxisomal β-Hydroxyisobutyryl-CoA Hydrolase

Zolman

Monroe-Augustus

Thompson

et al. 2001

Journal of Biological Chemistry

145

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The Arabidopsis chy1 mutant is resistant to indole-3-butyric acid, a naturally occurring form of the plant hormone auxin. Because the mutant also has defects in peroxisomal ␤-oxidation, this resistance presumably results from a reduced conversion of indole-3-butyric acid to indole-3-acetic acid. We have cloned CHY1, which appears to encode a peroxisomal protein 43% identical to a mammalian valine catabolic enzyme that hydrolyzes ␤-hydroxyisobutyryl-CoA. We demonstrated that a human ␤-hydroxyisobutyryl-CoA hydrolase functionally complements chy1 when redirected from the mitochondria to the peroxisomes. We expressed CHY1 as a glutathione S-transferase (GST) fusion protein and demonstrated that purified GST-CHY1 hydrolyzes ␤-hydroxyisobutyryl-CoA. Mutagenesis studies showed that a glutamate that is catalytically essential in homologous enoyl-CoA hydratases was also essential in CHY1. Mutating a residue that is differentially conserved between hydrolases and hydratases established that this position is relevant to the catalytic distinction between the enzyme classes. It is likely that CHY1 acts in peroxisomal valine catabolism and that accumulation of a toxic intermediate, methacrylyl-CoA, causes the altered ␤-oxidation phenotypes of the chy1 mutant. Our results support the hypothesis that the energy-intensive sequence unique to valine catabolism, where an intermediate CoA ester is hydrolyzed and a new CoA ester is formed two steps later, avoids methacrylyl-CoA accumulation.

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Cited by 280 publications

References 89 publications

The choice of auxin analogue for in vitro root induction influences post-induction root development in Eucalyptus grandis

The choice of auxin analogue for in vitro root induction influences post-induction root development in Eucalyptus grandis

Micropropagation of GF 677 Rootstock

chy1, an Arabidopsis Mutant with Impaired β-Oxidation, Is Defective in a Peroxisomal β-Hydroxyisobutyryl-CoA Hydrolase

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