Induction of agricultural weed seed germination by smoke and smoke-derived karrikin (KAR1), with a particular reference to Avena fatua L.

Kępczyński, Jan

doi:10.1007/s11738-018-2663-2

Cited by 28 publications

(24 citation statements)

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“…In addition, the regulatory mechanisms of dormancy status and the germination potential of a seed are postulated to also comprise the other plant hormones, including ethylene, auxins, jasmonates, and brassinosteroids (Linkies and Leubner-Metzger 2012;Corbineau et al 2014). Ethylene has been reported to break primary and secondary dormancy (Kępczyński andKępczyńska 1997, 2003;Corbineau et al 2014). Several studies have shown the correlation between ethylene production and/or action and the ability to germinate (Kępczyński and Kępczyńska 1997;Matilla and Matilla-Vázquez 2008;Corbineau et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Involvement of ethylene biosynthesis and perception during germination of dormant Avena fatua L. caryopses induced by KAR1 or GA3

Ruduś

Cembrowska-Lech

Jaworska

et al. 2018

Planta

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Main conclusion Germination of primary dormant wild oat caused by KAR 1 or GA 3 is associated with ACC accumulation and increased ethylene production shortly before radicle protrusion as a result of the non-transcriptional and transcriptional activation of ACS and ACO enzymes, respectively. Response to both compounds involves the modulation of ethylene sensitivity through ethylene receptor genes. Harvested Avena fatua caryopses are primary dormant and, therefore, germinated poorly at 20 °C. Karrikin 1 (KAR 1), which action probably requires endogenous gibberellins (GAs), and gibberellin A 3 (GA 3) was found to induce dormant caryopses to germinate. The stimulatory effects were accompanied by the activation of the ethylene biosynthesis pathway and depended on undisturbed ethylene perception. KAR 1 and GA 3 promoted 1-aminocyclopropane-1-carboxylic acid (ACC) accumulation during coleorhizae emergence and ethylene production shortly prior to the radicle protrusion, which resulted from the enhanced activity of two ethylene biosynthesis enzymes, ACC synthase (ACS) and ACC oxidase (ACO). The inhibitor of ACS adversely affected beneficial impacts of both KAR 1 and GA 3 on A. fatua caryopses germination, while the inhibitor of ACO more efficiently impeded the GA 3 effect. The inhibitors of ethylene action markedly lowered germination in response to KAR 1 and GA 3. Gene expression studies preceded by the identification of several genes related to ethylene biosynthesis (AfACS6, AfACO1, and AfACO5) and perception (AfERS1b, AfERS1c, AfERS2, AfETR2, AfETR3, and AfETR4) provided further evidence for the engagement of ethylene in KAR 1 and GA 3 induced germination of A. fatua caryopses. Both AfACO1 and AfACO5 were upregulated, whereas AfACS6 remained unaffected by the treatment. This suggests the existence of different regulatory mechanisms of enzymatic activity, transcriptional for ACO and non-transcriptional for ACS. During imbibition in water, AfERS1b was stronger expressed than other receptor genes. In the presence of KAR 1 or GA 3 , the expression of AfETR3 was substantially induced. Differential expression of ethylene receptor genes implies the modulation of caryopses sensitivity adjusted to ethylene availability and suggests the functional diversification of individual receptors.

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Section: Introductionmentioning

confidence: 99%

Involvement of ethylene biosynthesis and perception during germination of dormant Avena fatua L. caryopses induced by KAR1 or GA3

Ruduś

Cembrowska-Lech

Jaworska

et al. 2018

Planta

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“…However, the stimulatory effects of KAR 1 were suppressed in the presence of 2, 5‐norbornadiene (NBD: competitive and reversible inhibitor of ethylene reception) and 1‐methylcyclopropene (1‐MCP: a non‐reversible ethylene inhibitor), thus indicating the necessity of ethylene for the release of dormancy. Application of ethylene after NBD treatment again restored the germination potential in A. fatua caryopses (Kępczyński ). However, treatment of the dormant caryopses with ethylene biosynthetic inhibitors like α‐aminoisobutyric acid and aminoethoxyvinylglycine did not affect the activity of KAR 1 to a notable extent (Kępczyński and Van Staden ).…”

Section: Introductionmentioning

confidence: 92%

“…Along with paclobutrazol, other inhibitors of GA anabolism like ancymidol and flurprimidol also antagonized the germination‐promoting effects of KAR 1 , and this inhibition was released on treatment with GA 3 (Kępczyński et al ). Recent data also revealed that KAR 1 works in synchronization with GA 3 to degrade ABA to phaseic acid in order to induce dormancy release in the seeds of A. fatua (Kępczyński ).…”

Section: Introductionmentioning

confidence: 99%

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The karrikin ‘calisthenics’: Can compounds derived from smoke help in stress tolerance?

Banerjee

Tripathi

Roychoudhury

2018

Physiologia Plantarum

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Karrikins (KARs) are unique butenolides derived as a by-product of incomplete combustion during wildfire. Some receptive plant species respond to KARs in the form of accelerated germination. These molecules originate from stress to mediate tolerance against different sub-optimal conditions like oxidative stress, drought and low-light intensity (shade stress). KARs promote seed germination, seedling establishment and ecological diversity by accelerating the abundance of selective communities of plants. The signaling pathway is closely related, yet unique from strigolactones (SLs). Due to the structural relatedness with SLs, KARs have potential roles in mediating abiotic stress tolerance in plants. In addition, the KAR directly/indirectly interact with crucial phytohormones like abscisic acid, gibberellic acid, auxins and ethylene. This article is a summarized update on KAR research in recent times. The exhaustive discussions would be beneficial for understanding the extraordinary strategy devised by nature to protect plants from stress using a molecule which is itself generated out of stress.

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“…At the same time, KAR treatment can increase the expression of the GA 3 oxidase gene in Arabidopsis seeds [99]. Inhibitors of GA synthesis had an inhibitory effect on seed germination induced by smoke [175]. KAR 1 and GA 3 synergistically inhibit ABA activity and release seed dormancy [176].…”

Section: Sl or Kar Crosstalk With Gibberellinmentioning

confidence: 99%

Comparing and Contrasting the Multiple Roles of Butenolide Plant Growth Regulators: Strigolactones and Karrikins in Plant Development and Adaptation to Abiotic Stresses

Tao

Lian

Wang

2019

IJMS

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Strigolactones (SLs) and karrikins (KARs) are both butenolide molecules that play essential roles in plant growth and development. SLs are phytohormones, with SLs having known functions within the plant they are produced in, while KARs are found in smoke emitted from burning plant matter and affect seeds and seedlings in areas of wildfire. It has been suggested that SL and KAR signaling may share similar mechanisms. The α/β hydrolases DWARF14 (D14) and KARRIKIN INSENSITIVE 2 (KAI2), which act as receptors of SL and KAR, respectively, both interact with the F-box protein MORE AXILLARY GROWTH 2 (MAX2) in order to target SUPPRESSOR OF MAX2 1 (SMAX1)-LIKE/D53 family members for degradation via the 26S proteasome. Recent reports suggest that SLs and/or KARs are also involved in regulating plant responses and adaptation to various abiotic stresses, particularly nutrient deficiency, drought, salinity, and chilling. There is also crosstalk with other hormone signaling pathways, including auxin, gibberellic acid (GA), abscisic acid (ABA), cytokinin (CK), and ethylene (ET), under normal and abiotic stress conditions. This review briefly covers the biosynthetic and signaling pathways of SLs and KARs, compares their functions in plant growth and development, and reviews the effects of any crosstalk between SLs or KARs and other plant hormones at various stages of plant development. We also focus on the distinct responses, adaptations, and regulatory mechanisms related to SLs and/or KARs in response to various abiotic stresses. The review closes with discussion on ways to gain additional insights into the SL and KAR pathways and the crosstalk between these related phytohormones.factors through interactions between the phytohormone regulatory networks via the perception and signal transduction originating at various receptors [20][21][22][23].Strigolactones (SLs) were originally isolated from root exudates of cotton and as seed germination stimulants from plants in the Orobanchaceae family that parasitize plant roots (Striga, Phelipanche, and Orobanche spp.) [24][25][26]. SLs normally control seed germination and seedling development [27], shoot branching [28-32], root architecture [33], and leaf senescence [34]. SLs also promote beneficial symbiotic relationships between host plants and mycorrhizal fungi [35,36]. The biosynthesis and signaling of SLs are regulated by various abiotic stress factors [37][38][39][40], including the recently reported SL involvement in responding to nutrient deprivation, drought, chilling and salinity [38,[40][41][42][43][44][45][46][47][48][49][50]. Such studies provide new insights into the novel roles SL signaling plays in the regulation of plant adaptation to adverse environmental conditions [51][52][53][54].Karrikins (KARs) are found in smoke released from the heating or combustion of plant material, after which they can stimulate the germination of dormant seeds [55][56][57][58]. KARs are also involved in the inhibition of hypocotyl elongation and in the promotion of cotyledon expansion and...

show abstract

Induction of agricultural weed seed germination by smoke and smoke-derived karrikin (KAR1), with a particular reference to Avena fatua L.

Cited by 28 publications

References 59 publications

Involvement of ethylene biosynthesis and perception during germination of dormant Avena fatua L. caryopses induced by KAR1 or GA3

Involvement of ethylene biosynthesis and perception during germination of dormant Avena fatua L. caryopses induced by KAR1 or GA3

The karrikin ‘calisthenics’: Can compounds derived from smoke help in stress tolerance?

Comparing and Contrasting the Multiple Roles of Butenolide Plant Growth Regulators: Strigolactones and Karrikins in Plant Development and Adaptation to Abiotic Stresses

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