Plant Growth Substances

Arteca, Richard N.

doi:10.1007/978-1-4757-2451-6

Cited by 169 publications

(72 citation statements)

References 311 publications

(421 reference statements)

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“…Pb causes the imbalance of minerals K, Ca, Mg, Mn, Zn, Cu and Fe within the tissues by physically blocking the access of these ions to the absorption sites of roots (Godbold and Kettner, 1991). On the other hand, a number of studies have shown that plant hormones in general, and auxins in particular, can significantly affect the uptake and further transport of nutrients within plants by regulating the sink action of developing tissues (Arteca, 1996;San-Francisco et al, 2005). Brummer and Parish (1983) hypothesized that an ionic gradient of the differential transmembrane, due to auxininduced transport processes, resulted in changes in permeability of various ions.…”

Section: Discussionmentioning

confidence: 99%

Effect of indole-3-acetic acid on lead accumulation in maize (Zea mays L.) seedlings and the relevant antioxidant response

Wang

Shan

Wen

et al. 2007

Environmental and Experimental Botany

107

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The effect of indole-3-acetic acid (IAA) on lead (Pb) accumulation in maize (Zea mays L. cv. TY2) seedlings, and the responses of maize to Pb, IAA or Pb + IAA stress were investigated under hydroponic conditions. Exogenous IAA significantly increased Pb accumulation in roots, but significantly decreased Pb accumulation in shoots over the culture period of 5 days. Increased Pb uptake in maize roots partly took place through calcium and potassium channels, and also depended upon membrane potential. Lipid peroxidation in terms of malondialdehyde (MDA) content was enhanced, indicating that Pb and/or IAA caused oxidative stress in maize seedlings. Under stress conditions the antioxidant defense mechanism was activated. Some antioxidant enzymes such as superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) were up-regulated compared to the control. Pb, IAA or Pb + IAA treatments resulted in a general reduction of macro-and micronutrient contents, especially of K, Ca and Mn. Compared to a single Pb or IAA treatment, treatment with a combination of Pb + IAA induced more severe oxidative stress on maize roots and shoots as inferred from the higher observed MDA and lower nutrient contents. A Fourier transform infrared (FTIR) spectroscopic study indicated that Pb reacted with the carboxylic acid group of the IAA pyrrole cycle.

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Section: Discussionmentioning

confidence: 99%

Effect of indole-3-acetic acid on lead accumulation in maize (Zea mays L.) seedlings and the relevant antioxidant response

Wang

Shan

Wen

et al. 2007

Environmental and Experimental Botany

107

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“…In his book "The Power of Movement in Plants," he described how the effects of light on movement of canary grass coleoptiles were mediated by a chemical signal (Darwin and Darwin, 1880). It took another 60 years of research to show that this chemical signal is indole-3-acetic acid, the major naturally occurring auxin in plants (Haagen-Smit et al, 1946;Mauseth, 1991;Raven et al, 1992;Salisbury and Ross, 1992;Arteca, 1996). After this discovery, auxin research advanced rapidly along multiple trajectories.…”

Section: Introductionmentioning

confidence: 99%

SCF^TIR1/AFB-Based Auxin Perception: Mechanism and Role in Plant Growth and Development

2015

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Auxin regulates a vast array of growth and developmental processes throughout the life cycle of plants. Auxin responses are highly context dependent and can involve changes in cell division, cell expansion, and cell fate. The complexity of the auxin response is illustrated by the recent finding that the auxin-responsive gene set differs significantly between different cell types in the root. Auxin regulation of transcription involves a core pathway consisting of the TIR1/AFB F-box proteins, the Aux/IAA transcriptional repressors, and the ARF transcription factors. Auxin is perceived by a transient coreceptor complex consisting of a TIR1/AFB protein and an Aux/IAA protein. Auxin binding to the coreceptor results in degradation of the Aux/ IAAs and derepression of ARF-based transcription. Although the basic outlines of this pathway are now well established, it remains unclear how specificity of the pathway is conferred. However, recent results, focusing on the ways that these three families of proteins interact, are starting to provide important clues.

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“…When exposed to cycloheximide 10 −5 M their endogenous cytokinin level was so low, that higher levels of exogenously applied cytokinins were required to alleviate the harmful effect of the antibiotic. It also might be possible that the exogenous cytokinins have higher stability and are more effective in leaf regeneration than the endogenous ones (Arteca 1996;Naik et al 2002). Increasing chlorophyll content was observed in cucumber seedlings after benzyladenine treatment (Kuroda et al 2000).…”

Section: Discussionmentioning

confidence: 99%

Changes in photosynthetic apparatus of mustard (Sinapis alba) cotyledons following cycloheximide and kinetin treatments

2008

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Biochemical and accompanying structural characteristics of the photosynthetic process were studied in mustard seedlings cultivated on medium with increasing concentrations of cycloheximide alone as well as in combination with various kinetin concentrations. After 7 days of cultivation the contents of total chlorophyll, carotenoids and content of Rubisco in mustard cotyledons were determined. The content of chlorophyll pigments and carotenoids decreased in dependence of cycloheximide concentration. Following antibiotic treatment the content of both Rubisco subunits markedly decreased. In addition cycloheximide caused disturbance in mesophyll organization and chloroplast ultrastructure. Kinetin applied with cycloheximide increased the amount of photosynthetic pigments as well as of Rubisco, compared to the cycloheximide alone. In the seedlings treated with cycloheximide+kinetin the structure of leaf mesophyll and chloroplast membrane system was similar to control. Our results indicate that kinetin diminished the negative effects of cycloheximide on photosynthetic pigments and Rubisco as well as on the structural traits of the cotyledons.

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Plant Growth Substances

Cited by 169 publications

References 311 publications

Effect of indole-3-acetic acid on lead accumulation in maize (Zea mays L.) seedlings and the relevant antioxidant response

Effect of indole-3-acetic acid on lead accumulation in maize (Zea mays L.) seedlings and the relevant antioxidant response

SCF^TIR1/AFB-Based Auxin Perception: Mechanism and Role in Plant Growth and Development

Changes in photosynthetic apparatus of mustard (Sinapis alba) cotyledons following cycloheximide and kinetin treatments

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Plant Growth Substances

Cited by 169 publications

References 311 publications

Effect of indole-3-acetic acid on lead accumulation in maize (Zea mays L.) seedlings and the relevant antioxidant response

Effect of indole-3-acetic acid on lead accumulation in maize (Zea mays L.) seedlings and the relevant antioxidant response

SCFTIR1/AFB-Based Auxin Perception: Mechanism and Role in Plant Growth and Development

Changes in photosynthetic apparatus of mustard (Sinapis alba) cotyledons following cycloheximide and kinetin treatments

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SCF^TIR1/AFB-Based Auxin Perception: Mechanism and Role in Plant Growth and Development