The Five "Classical" Plant Hormones.

Kende, Hans; Zeevaart, Jan A. D.

doi:10.1105/tpc.9.7.1197

Cited by 476 publications

(294 citation statements)

References 101 publications

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“…Auxins, cytokinins, gibberellins, abscisic acid and ethylene are the five classical groups of plant hormones (Kende and Zeevaart, 1997). Ideas about hormone function have evolved from numerous experiments in which the application of the hormones have shown to affect cell division in the vascular cambium, cell expansion and control of differentiation into different types of cambial derivates (Mellerowicz et al, 2001).…”

Section: The Plant Hormone Auxinmentioning

confidence: 99%

Auxin Control in the Formation of Adventitious Roots

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Pamfil

Bellini

2011

Not Bot Hort Agrobot Cluj

139

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Adventitious rooting is a complex process and a key step in the vegetative propagation of economically important woody, horticultural and agricultural species, playing an important role in the successful production of elite clones. The formation of adventitious roots is a quantitative genetic trait regulated by both environmental and endogenous factors. Among phytohormones, auxin plays an essential role in regulating roots development and it has been shown to be intimately involved in the process of adventitious rooting. Great progress has been made in elucidating the auxin-induced genes and auxin signaling pathway, especially in auxin response Aux/IAA and Auxin Response Factor gene families. Although some important aspects of adventitious and lateral rooting signaling have been revealed, the intricate signaling network remains poorly understood. This review summarizes some of the current knowledge on the physiological aspects of adventitious root formation and highlights the recent progress made in the identification of putative molecular players involved in the control of adventitious rooting. Despite much has been discovered regarding the effects and regulation of auxins on plant growth since the Darwin experiments, there is much that remains unknown.

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Section: The Plant Hormone Auxinmentioning

confidence: 99%

Auxin Control in the Formation of Adventitious Roots

Pop

Pamfil

Bellini

2011

Not Bot Hort Agrobot Cluj

139

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“…In higher plants, ethylene is produced from methionine via S-adenosyl-L-methionine and 1-aminocyclopropane-1-carboxylate (Met4SAM4ACC4ethylene) [18,19,45]. The last two steps of this biosynthetic pathway are catalysed by ACC synthase and ACC oxydase, respectively.…”

Section: Induction Of Isr Is Not Accompanied By Local Changes In Ethymentioning

confidence: 99%

Rhizobacteria-mediated induced systemic resistance (ISR) in Arabidopsis requires sensitivity to jasmonate and ethylene but is not accompanied by an increase in their production

Pieterse

Pelt

Ton

et al. 2000

Physiological and Molecular Plant Pathology

218

118

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Plants develop an enhanced defensive capacity against a broad spectrum of plant pathogens after colonization of the roots by selected strains of nonpathogenic biocontrol bacteria. In Arabidopsis thaliana, this induced systemic resistance (ISR) functions independently of salicylic acid but requires an intact response to the plant hormones jasmonic acid (JA) and ethylene. To further investigate the roles of JA and ethylene in the ISR signalling pathway, the levels of these signalling molecules were determined in A. thaliana upon induction of ISR by Pseudomonas¯uorescens WCS417r and subsequent challenge inoculation with Pseudomonas syringae pv. tomato DC3000. Upon treatment of the roots with ISR-inducing WCS417r bacteria, neither the JA content, nor the level of ethylene evolution was altered in systemically resistant leaves. In®ltration of leaves with WCS417r triggered the JA-and ethylene-dependent ISR pathway, but did not cause local changes in the production of either of these signalling molecules. These results indicate that rhizobacteria-mediated ISR is not based on the induction of changes in the biosynthesis of either JA or ethylene. However, in ISR-expressing plants the capacity to convert 1-aminocyclopropane-1-carboxylate (ACC) to ethylene was signi®cantly enhanced, providing a greater potential to produce ethylene upon pathogen attack.*

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“…Auxins regulate and stimulate cell elongation and division (Kende, Zeevaart, 1997). However, high tissue auxins concentration leads to adverse effects in plants resulting in plant tissue decay and plant death.…”

Section: Introductionmentioning

confidence: 99%

The effects of phenoxy herbicide MCPA on non-target vegetation in spring wheat (Triticum aestivum L.) culture

Žaltauskaitė¹,

Kišonaitė²

2014

biologija

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The presentation was made at the 8th international conference "The Vital Nature Sign" on 15-17 May, 2014 The study examined the non-target effects of phenoxy herbicide MCPA (4-chloro-2-methyl-phenoxy acid) on the morphological and physiological characteristics of spring wheat (Triticum aestivum L.) under field conditions. The experiment was conducted in 4 mesocoms plots (0.1 a) from May to August 2012. The plants were sprayed directly with herbicide spray solutions equivalent of recommended field application rate. The mea sured endpoints were as follows: height of the shoots, length of the roots, dry biomass, concentrations of chlorophyll a, b, caro tenoids, malondialdehyde (MDA). The yield of wheat and residues of MCPA in wheat tissues and soil were also estimated. It was observed that herbicide slightly reduced spring wheat stem height (by 9%, p < 0.05), increased root length (p > 0.05). Dry weight of spring wheat stems and roots decreased by 14% (p < 0.05) and 17% (p > 0.05), respectively. The herbicide did not evoke significant effect on the content of photosynthetic pigments and MDA in plant tissues. MCPA herbicide residues were observed only in soil and stems of spring wheat and were 0.97 μg/kg and 0.047 mg/ kg, respectively.

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The Five "Classical" Plant Hormones.

Cited by 476 publications

References 101 publications

Auxin Control in the Formation of Adventitious Roots

Auxin Control in the Formation of Adventitious Roots

Rhizobacteria-mediated induced systemic resistance (ISR) in Arabidopsis requires sensitivity to jasmonate and ethylene but is not accompanied by an increase in their production

The effects of phenoxy herbicide MCPA on non-target vegetation in spring wheat (Triticum aestivum L.) culture

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