Effects of chlorosubstituted indoleacetic acids on root growth, ethylene and ATP formation

Stenlid, Göran; Engvild, Kjeld C.

doi:10.1111/j.1399-3054.1987.tb06118.x

Cited by 12 publications

(4 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In earlier reports, though small increase in ethylene with increasing IAA concentrations (Bucher and Pilet 1983;Stenlid and Engwild 1987). Nevertheless, if inhibition of root elongation by IAA is mediated through ethylene, it should produce similar eVects of ACC on the substrate that leads to increase of ethylene and hence inhibition of root elongation (Eliasson et al 1989) and this could not be observed in this study.…”

Section: Discussioncontrasting

confidence: 65%

Characterization of 1-aminocyclopropane-1-carboxylate (ACC) deaminase containing Methylobacterium oryzae and interactions with auxins and ACC regulation of ethylene in canola (Brassica campestris)

Madhaiyan

Prabakaran

2007

Planta

120

View full text Add to dashboard Cite

The possible interaction of the plant hormones auxin and ethylene and the role of 1-aminocyclopropane-1-carboxylate (ACC) deaminase containing bacteria on ethylene production in canola (Brassica campestris) in the presence of inhibitory concentrations of growth regulators were investigated. The effects of auxin (indole-3-acetic acid and 2,4-dichlorophenoxy acetic acid), auxin transport inhibitor 2-(p-chlorophenoxy)-2-methylpropionic acid, ethylene precursor 1-aminocyclopropane-1-carboxylate and ethylene synthesis inhibitor L-alpha-(2-aminoethoxyvinyl)glycine hydrochloride on root elongation were concentration dependent. Exogenous addition of growth regulators influences the enzyme activities of ethylene production and we have presented here evidences that support the hypothesis that inhibitory effects of auxin on root elongation are independent of ethylene. Additionally, we have proved that inoculation of ACC deaminase containing Methylobacterium oryzae sequester ACC exuded from roots and hydrolyze them lowering the concentration of ACC in root exudates. However, the inhibitory actions of exogenous additions of auxins could not be ameliorated by bacterial inoculation that reduces ethylene concentration in canola seedlings.

show abstract

Section: Discussioncontrasting

confidence: 65%

Characterization of 1-aminocyclopropane-1-carboxylate (ACC) deaminase containing Methylobacterium oryzae and interactions with auxins and ACC regulation of ethylene in canola (Brassica campestris)

Madhaiyan

Prabakaran

2007

Planta

120

View full text Add to dashboard Cite

show abstract

“…5-CI-IAA is of moderate activity, whereas 5-Br-IAA is less active (B6ttger, Engvild & Soil, 1978). However, 7-CI-IAA shows anti-auxin activity (Stenlid & Engvild;1987). The role of 4-CI-IAA in the plant is not clear and little is known about its metabolism or the possibility to replace IAA.…”

Section: Introductionmentioning

confidence: 99%

Structural studies on monohalogenated derivatives of the phytohormone indole-3-acetic acid (auxin)

Nigović¹,

Kojić‐Prodić²,

Antolić³

et al. 1996

Acta Crystallogr Sect B

View full text Add to dashboard Cite

The physiological properties of the phytohormone (auxin) indole-3-acetic acid (IAA) and its ring substituted derivatives have so far been rationalized by a number of contradictory hypotheses based on incomplete structural data deduced mainly by inspection of molecular models. In order to give more evidence for structure–activity relationships of monohalogenated IAA's, the molecular structures of the natural auxin 4-CI-IAA as well as 5-CI-IAA, 6-CI-IAA, 7-CI-IAA and 5-Br-IAA have been compared, as revealed by X-ray analysis, and molecular mechanics and dynamics. The influence of the substitution site and the size of the halogen atom and bioactivity is discussed. The typical structural feature of the molecules studied is the slight distortion of part of the indole nucleus around C7: bond length C6—C7 1.368 (6) Å and C6—C7—C71 117.6 (3)° (average values of five structures and seven molecules). The conformations of monohalogenated indole-3-acetic acid molecules, characteristic for auxins, are defined by rotations about two bonds only: one describes the relative orientation of a side chain towards the indole moiety and the second the orientation of the carboxylic group. The results of X-ray structure analysis, and molecular mechanics and dynamics revealed the folded shape of the molecules in all compounds studied. Ab initio calculations showed that the planar conformation can be adopted as well. Crystal data at 297 K for 4-CI-IAA, 6-CI-IAA, 7-CI-IAA and 5-Br-IAA, and at 220 K for 5-CI-IAA, using Mo Kα radiation (λ = 0.71073 Å), and CuKα (λ = 1.5418 Å) for 6-CI-IAA, are as follows: 4-CI-IAA, C10H8ClNO2, Mr = 209.63, monoclinic, P21/c, a = 7.313 (4), b = 17.156 (4), c = 7.640 (4) Å, β = 92.71 (5)°, V = 957.5 (1) Å3, Z = 4, Dx = 1.454 g cm−3, μ = 3.7 cm−1, F(000) = 432, R = 0.037, wR = 0.039 for 1040 symmetry-independent [I ≥ 3σ(I)] reflections; 5-CI-IAA, C10H8ClNO2, monoclinic, P21/c, a = 19.141 (4), b = 5.154 (2), c = 10.323 (3) Å, β = 116.23 (2)°, V = 913.5 (1) Å3, Z = 4, Dx = 1.524 g cm−3, μ = 3.8 cm−1, F(000) = 432, R = 0.039, wR = 0.042 for 1184 symmetry-independent [I≥ 3σ(I)] reflections; 6-CI-IAA, C10H8ClNO2, orthorhombic, Pbca, a = 61.08 (1), b = 12.115 (7), c = 7.674 (5) Å, V = 5679 (5) Å3, Z = 24, Dx = 1.471 g cm−3, μ = 33.9 cm−1, F(000) = 2592, R = 0.052, wR = 0.052 for 3030 symmetry-independent [I ≥ σ(I)] reflections; 7-CI-IAA, C10H8ClNO2, monoclinic, P21/c, a = 20.244 (5), b = 4.829 (2), c = 10.728 (4) Å, β = 116.30 (1)°, V = 940 (1) Å3, Z = 4, Dx = 1.481 g cm−3, μ = 3.7 cm−1, F(000) = 432, R = 0.042, wR = 0.029 for 889 symmetry-independent [I ≥ 3σ(I)] reflections; 5-Br-IAA, C10H8BrNO2, Mr = 254.08, triclinic, P{\bar 1}, a = 5.645 (3), b = 9.713 (4), c = 10.019 (4) Å, α = 116.02 (3), β = 92.67 (5), γ = 100.12 (4)°, V = 481.2 (5) Å3, Z = 2, Dx = 1.754 g cm−3, μ = 42.0 cm−1, F(000) = 252, R = 0.029, wR = 0.020 for 1865 symmetry-independent [I ≥ 3σ(I)] reflections.

show abstract

“…The first known ubiquitously occurring auxin is indole-3-acetic acid (IAA), but various other analogues such as 4-Cl-IAA have also been identified in certain species. This halogenated compound is characterized by very high auxin-like activity (REINECKE et al 1995), demonstrated in the growth of excised tissue (KATEKAR and GEISSLER 1982), rooting in mung bean (STENLID et al 1987), parthenocarpy and epinasty in tomato (SELL et al 1953) and the synthesis/induction of specific enzymes in detached pea cotyledons (HIRASAWA 1989, AHMAD and HAYAT 1999, AHMAD et al 2001a). In addition, acceleration of the rate of photosynthesis resulting in enhancement of the economic yield has also been reported (AHMAD et al 2001b).…”

Section: Introductionmentioning

confidence: 99%

Comparative effects of 4-Cl-IAA and kinetin on photosynthesis, nitrogen metabolism and yield of black cumin (Nigella sativa L.)

Shah¹

2011

Acta Botanica Croatica

View full text Add to dashboard Cite

The leaves of 40-day old plants of black cumin (Nigella sativa L.) were sprayed with 10 -7 , 10 -6 , 10 -5 M 4-Cl-IAA, and 10 -6 , 10 -5 and 10 -4 M kinetin. Both the hormones improved vegetative growth, photosynthetic efficiency and seed yield of the test plants as compared to deionized water (control). However, 10 -6 M 4-Cl-IAA was most prominent in its effect, generating 42, 30, 40, 41 and 51% higher values for carbonic anhydrase, nitrate reductase, net photosynthetic rate, leaf protein content and dry mass respectively, as compared to the control in 70-day old plants. Similarly, capsule number and seed yield per plant were elevated by 41 and 43% over the untreated control at harvest (130 days after sowing) following the same treatment. Overall, the auxin showed a higher efficiency than kinetin in all treatment concentrations.

show abstract

Effects of chlorosubstituted indoleacetic acids on root growth, ethylene and ATP formation

Cited by 12 publications

References 15 publications

Characterization of 1-aminocyclopropane-1-carboxylate (ACC) deaminase containing Methylobacterium oryzae and interactions with auxins and ACC regulation of ethylene in canola (Brassica campestris)

Characterization of 1-aminocyclopropane-1-carboxylate (ACC) deaminase containing Methylobacterium oryzae and interactions with auxins and ACC regulation of ethylene in canola (Brassica campestris)

Structural studies on monohalogenated derivatives of the phytohormone indole-3-acetic acid (auxin)

Comparative effects of 4-Cl-IAA and kinetin on photosynthesis, nitrogen metabolism and yield of black cumin (Nigella sativa L.)

Contact Info

Product

Resources

About