Diurnal Fluctuations in Ethylene Formation in Chenopodium rubrum

Macháčková, Ivana; Chauvaux, N.; Dewitte, Walter; Onckelen, H. Van

doi:10.1104/pp.113.3.981

Cited by 46 publications

(23 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When ACC is supplied in high amounts to Arabidopsis seedlings that were transferred to continuous dark, we observed a gradual decrease in ethylene production, contrasting with the situation in continuous light. This response was highly similar to the one observed in C. rubrum (Machackova et al, 1997). In our experiments, the decrease in ethylene emanation coincided with a decrease in transcripts of putative ACOs.…”

Section: Discussion Light and The Circadian Clock Control Transcript supporting

confidence: 65%

“…Controls at the levels of formation of both ACC and ethylene have been reported, respectively catalyzed by ACS and ACO. Depending on the species and on the environmental conditions either one of these steps can be of crucial importance (Kathiresan et al, 1996(Kathiresan et al, , 1998Machackova et al, 1997;Finlayson et al, 1999).…”

Section: Discussion Light and The Circadian Clock Control Transcript mentioning

confidence: 99%

“…In Sorghum bicolor, ethylene peaks during the day (Finlayson et al, 1998). In Chenopodium rubrum, ACC levels showed circadian fluctuation (Machackova et al, 1997). Cotton (Gossypium hirsutum) and Stellaria longipes also have rhythmic ethylene emanation.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Circadian Rhythms of Ethylene Emission in Arabidopsis

et al. 2004

View full text Add to dashboard Cite

Ethylene controls multiple physiological processes in plants, including cell elongation. Consequently, ethylene synthesis is regulated by internal and external signals. We show that a light-entrained circadian clock regulates ethylene release from unstressed, wild-type Arabidopsis (Arabidopsis thaliana) seedlings, with a peak in the mid-subjective day. The circadian clock drives the expression of multiple ACC SYNTHASE genes, resulting in peak RNA levels at the phase of maximal ethylene synthesis. Ethylene production levels are tightly correlated with ACC SYNTHASE 8 steady-state transcript levels. The expression of this gene is controlled by light, by the circadian clock, and by negative feedback regulation through ethylene signaling. In addition, ethylene production is controlled by the TIMING OF CAB EXPRESSION 1 and CIRCADIAN CLOCK ASSOCIATED 1 genes, which are critical for all circadian rhythms yet tested in Arabidopsis. Mutation of ethylene signaling pathways did not alter the phase or period of circadian rhythms. Mutants with altered ethylene production or signaling also retained normal rhythmicity of leaf movement. We conclude that circadian rhythms of ethylene production are not critical for rhythmic growth.Since the discovery of ethylene production in plants in the 1930s, researchers have tried to elucidate mechanisms governing ethylene formation. A major breakthrough was the completion of the enzymatic pathway for ethylene biosynthesis 50 years later (for review, see Yang and Hoffman, 1984). Shortly thereafter, the first genes encoding ethylene biosynthetic enzymes were cloned (Sato and Theologis, 1989;Van Der Straeten et al., 1990;Hamilton et al., 1991;Spanu et al., 1991). With the use of tomato (Lycopersicon esculentum) and especially Arabidopsis (Arabidopsis thaliana) as model plants, molecular biological and genetic analysis has shed light on many physiological processes involving ethylene (Abeles et al., 1992;Somerville and Meyerowitz, 2002). In higher plants, the enzymes for ethylene biosynthesis are encoded by gene families. The members of these families are differentially responsive to various ethylene-inducing factors, including wounding, fruit ripening, pathogen infections, auxins, and cytokinins (for review, see Fluhr and Mattoo, 1996).In Arabidopsis, there are 12 genes in the family of enzymes that produces the ethylene precursor 1-amino-cyclopropane-1-carboxylic acid (ACC), one of which, ACC SYNTHASE 3 (ACS3), is a pseudogene (Yamagami et al., 2003;Tsuchisaka and Theologis, 2004). ACS1 is not functional as an ACS (Liang et al., 1992). ACS10 and ACS12 do not function as ACSs either, but as aminotransferases (Yamagami et al., 2003). Many of the ACS genes are regulated on the transcriptional level. ACS2 transcription in leaves is switched off when tissues mature (Rodrigues-Pousada et al., 1993; in this paper the gene was designated ACS1). ACS4 can be induced by auxins (Abel et al., 1995). ACS5 is regulated by cytokinins that cause stabilization of the protein (Chae et al., 2003). ACS6 is induce...

show abstract

Section: Discussion Light and The Circadian Clock Control Transcript supporting

confidence: 65%

Section: Discussion Light and The Circadian Clock Control Transcript mentioning

confidence: 99%

See 1 more Smart Citation

Circadian Rhythms of Ethylene Emission in Arabidopsis

et al. 2004

View full text Add to dashboard Cite

show abstract

“…In summary, arbuscular mycorrhizal fungi colonization and symbiosis improve salt resistance in maize due to better nutrient availability, increased potassium/sodium ratios in plant tissues, and better osmotic adjustment 4.5 Plant-growth-promoting rhizobacteria Soil bacteria applied through seed inoculation, which colonize plant roots and enhance plant growth and/or resistance against abiotic stresses, are called plant-growth-promoting rhizobacteria. Increased ethylene in plants is directly related to the concentration of 1-aminocyclopropane-1-carboxylate, produced under stress conditions, in plant tissues (Machackov et al 1997). Recently, it was discovered that several plant-growth-promoting rhizobacteria promote plant growth by lowering endogenous ethylene synthesis in roots through 1-aminocyclopropane-1-carboxylate deaminase activity (Glick et al 1998).…”

Section: Arbuscular Mycorrhizal Fungimentioning

confidence: 99%

Salt stress in maize: effects, resistance mechanisms, and management. A review

Farooq

Hussain

Wakeel

et al. 2015

Agron. Sustain. Dev.

590

383

View full text Add to dashboard Cite

Maize is grown under a wide spectrum of soil and climatic conditions. Maize is moderately sensitive to salt stress; therefore, soil salinity is a serious threat to its production worldwide. Understanding maize response to salt stress and resistance mechanisms and overviewing management options may help to devise strategies for improved maize performance in saline environments. Here, we reviewed the effects, resistance mechanisms, and management of salt stress in maize. Our main conclusions are as follows: (1) germination and stand establishment are more sensitive to salt stress than later developmental stages. (2) High rhizosphere sodium and chloride decrease plant uptake of nitrogen, potassium, calcium, magnesium, and iron. (3) Reduced grain weight and number are responsible for low grain yield in maize under salt stress. Sink limitations and reduced acid invertase activity in developing grains is responsible for poor kernel setting under salt stress. (4) Exclusion of excessive sodium or its compartmentation into vacuoles is an important adaptive strategy for maize under salt stress. (5) Apoplastic acidification, required for cell wall extensibility, is an important indicator of salt resistance, but not essential for better maize growth under salt stress. (6) Upregulation of antioxidant defense genes and β-expansin proteins is important for salt resistance in maize. (7) Arbuscular mycorrhizal fungi improve salt resistance in maize due to better plant nutrient availability. (8) Seed priming is an effective approach for improving maize germination under salt stress. (9) Integration of screening, breeding and ion homeostasis mechanisms into a functional paradigm for the whole plant may help to enhance salt resistance in maize.

show abstract

“…In rice panicles, ethylene evolution was the highest at the milk ripening stage, and decreased thereafter (Saka et al, 1992) . Ethylene evolution from the leaf sheaths of rice (Michiyama and Saka, 1988), Stellaria longipes (Emery et al, 1994(Emery et al, , 1997 and Chenopodium rubrum (Machackova et al, 1997) exhibits diurnal fluctuation with a high level in the day time and low level at night.…”

mentioning

confidence: 99%