Ethylene in the regulation of major biotechnological processes

Vincent, Celia; Munné‐Bosch, Sergi

doi:10.1016/b978-0-323-85846-5.00014-x

Cited by 2 publications

(3 citation statements)

References 136 publications

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“…For biotechnological purposes subsequent AR formation is fundamental to a successful acclimatization. Studies have shown that ethylene can affect plant development differently, depending on the plant species, tissue type, and hormone supplementation [39,74]. In tomato and cucumber, ethylene also increases AR formation through an auxin-ethylene crosstalk [75][76][77], supporting our results.…”

Section: Inhibition Of Ethylene Biosynthesis and Perception During Sh...supporting

confidence: 88%

“…DNSO has been highly applied for breeding purposes, especially in dicotyledonous species, due to the simplicity and robustness of culture conditions [9]. Ethylene response varies significantly based on the organ, time, and species; thus it is difficult to assign a unique and general role of ethylene in the regulation of biotechnological processes [39]. Therefore, understanding how ethylene regulates DNSO, focusing on woody species, could have important practical applications, such as developing new methods for plant propagation, regeneration and giving relevant insights about recalcitrance in some species.…”

Section: Introductionmentioning

confidence: 99%

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Ethylene Inhibition Reduces De Novo Shoot Organogenesis and Subsequent Plant Development from Leaf Explants of Solanum betaceum Cav.

Neves

Correia

Canhoto

2023

Plants

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In de novo shoot organogenesis (DNSO) plant cells develop into new shoots, without the need of an existing meristem. Generally, this process is triggered by wounding and specific growth regulators, such as auxins and cytokinins. Despite the potential significance of the plant hormone ethylene in DNSO, its effect in regeneration processes of woody species has not been thoroughly investigated. To address this gap, Solanum betaceum Cav. was used as an experimental model to explore the role of this hormone on DNSO and potentially extend the findings to other woody species. In this work it was shown that ethylene positively regulates DNSO from tamarillo leaf explants. Ethylene precursors ACC and ethephon stimulated shoot regeneration by increasing the number of buds and shoots regenerated. In contrast, the inhibition of ethylene biosynthesis or perception by AVG and AgNO3 decreased shoot regeneration. Organogenic callus induced in the presence of ethylene precursors showed an upregulated expression of the auxin efflux carrier gene PIN1, suggesting that ethylene may enhance shoot regeneration by affecting auxin distribution prior to shoot development. Additionally, it was found that the de novo shoot meristems induced in explants in which ethylene biosynthesis and perception was suppressed were unable to further develop into elongated shoots. Overall, these results imply that altering ethylene levels and perception could enhance shoot regeneration efficiency in tamarillo. Moreover, we offer insights into the possible molecular mechanisms involved in ethylene-induced shoot regeneration.

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Section: Inhibition Of Ethylene Biosynthesis and Perception During Sh...supporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Ethylene Inhibition Reduces De Novo Shoot Organogenesis and Subsequent Plant Development from Leaf Explants of Solanum betaceum Cav.

Neves

Correia

Canhoto

2023

Plants

View full text Add to dashboard Cite

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“…This is essential due to the extended nut drop experienced in macadamia, leading to challenges such as multiple harvest periods that incur additional costs and labor-intensive operations [5]. As a natural plant hormone, ethylene plays a crucial role in various physiological processes, which include fruit ripening, senescence, and abscission [6,7]. The fat content of nuts is also correlated with fruit ripening whereby mature crops exhibit a higher ratio of unsaturated fatty acids to saturated fatty acids compared to immature crops [8].…”

Section: Introductionmentioning

confidence: 99%

Impact of Preharvest Ethephon Foliar Spray on the Postharvest Fatty Acid Profile and Dietary Indicators of Macadamia Nuts

Aruwajoye,

Mditshwa,

Magwaza

et al. 2023

Agriculture

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The use of ethephon, designed to stimulate nut detachment, initiates the release of ethylene, a well-established regulator of postharvest shelf-life in various agricultural products. This study aimed to assess the impact of ethephon application on individual fatty acids and dietary indicators in two macadamia nut cultivars, namely ‘788’ and ‘Beaumont,’ during postharvest storage. Nuts that naturally abscised and those detached through ethephon treatment were divided into two groups: the ethylene-treated group (ED) and the control group (CD). Nuts were stored at 25°C and sampled at 0, 36, and 72 days for fatty profile analysis. Our findings indicated a significant increase in stearic acid content in ED nuts (24,622 µg/g) compared to CD nuts (16,764 µg/g) at the end of the storage period for the ‘Beaumont’ cultivar. Additionally, unsaturated fatty acids (USFAs), such as eicosatrienoic acid + erucic acid (C20:3n3+C22:1) and eicosatrienoic acid + alpha-linolenic acid (C20:1 + C18:3n3), were notably reduced. Hierarchical clustering analysis revealed positive correlations between ethylene treatment and saturated fatty acids (SFAs) in both ‘Beaumont’ (0.78) and ‘788’ (0.80) cultivars. This also coincided with an increase in atherogenic indices, thrombogenic index, and saturation index and a decrease in the hypocholesterolemic/hypercholesterolemic ratio and arachidonic acid (C20:4n6) within the ED group of the ‘Beaumont’ cultivar, collectively potentially impacting nutritional quality negatively. Furthermore, our findings indicated that the PUFA:SFA ratio was higher in CD (0.51) compared to ED (0.45) on day 72 for the ‘Beaumont’ cultivar, revealing differences in fatty acid compositions between the two treatment groups. Conversely, for ‘788’, both ED and CD had a PUFA:SFA ratio below 0.45, indicating an increased risk of cardiovascular diseases. These results suggest that ethephon treatment increases SFA levels and reduces USFA levels in the ‘Beaumont’ cultivar, while the response to ethylene varies between the two cultivars. Thus, the study provides insight into the significant role of modifying ethephon treatment methods and careful cultivar selection in the attainment of optimal nutritional value and shelf-life of macadamia nuts.

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Ethylene in the regulation of major biotechnological processes

Cited by 2 publications

References 136 publications

Ethylene Inhibition Reduces De Novo Shoot Organogenesis and Subsequent Plant Development from Leaf Explants of Solanum betaceum Cav.

Ethylene Inhibition Reduces De Novo Shoot Organogenesis and Subsequent Plant Development from Leaf Explants of Solanum betaceum Cav.

Impact of Preharvest Ethephon Foliar Spray on the Postharvest Fatty Acid Profile and Dietary Indicators of Macadamia Nuts

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