Differential response to heat stress in outer and inner onion bulb scales

Galsurker, Ortal; Doron‐Faigenboim, Adi; Teper‐Bamnolker, Paula; Daus, Avinoam; Lers, Amnon; Eshel, Dani

doi:10.1093/jxb/ery189

Cited by 16 publications

(6 citation statements)

References 81 publications

(99 reference statements)

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“…Several TF families (MYB, WRKY, NAC, and bHLH) were identified by searching plantTFDB. These TFs are known to play a role in molecular regulation in response to biotic as well as abiotic stresses in several plants [ 29 ], including onion under the cold [ 12 ] and heat stress [ 30 ]. InterProScan analysis was performed for functional analysis of transcripts by classifying them into families and predicting domains and important sites.…”

Section: Discussionmentioning

confidence: 99%

Comparative transcriptome analyses in contrasting onion (Allium cepa L.) genotypes for drought stress

et al. 2020

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Onion ( Allium cepa L.) is an important vegetable crop widely grown for diverse culinary and nutraceutical properties. Being a shallow-rooted plant, it is prone to drought. In the present study, transcriptome sequencing of drought-tolerant (1656) and drought-sensitive (1627) onion genotypes was performed to elucidate the molecular basis of differential response to drought stress. A total of 123206 and 139252 transcripts (average transcript length: 690 bases) were generated after assembly for 1656 and 1627, respectively. Differential gene expression analyses revealed upregulation and downregulation of 1189 and 1180 genes, respectively, in 1656, whereas in 1627, upregulation and downregulation of 872 and 1292 genes, respectively, was observed. Genes encoding transcription factors, cytochrome P450, membrane transporters, and flavonoids, and those related to carbohydrate metabolism were found to exhibit a differential expression behavior in the tolerant and susceptible genotypes. The information generated can facilitate a better understanding of molecular mechanisms underlying drought response in onion.

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Section: Discussionmentioning

confidence: 99%

Comparative transcriptome analyses in contrasting onion (Allium cepa L.) genotypes for drought stress

et al. 2020

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“…related to ethylene biosynthesis ( Cools et al, 2011 ). Although there is not yet an onion genome reference assembly, the onion transcriptome has recently been more fully described in several studies using RNA sequencing (RNA-Seq) and de novo transcriptome assembly ( Shon et al, 2016 ; Zhang et al, 2016 , 2018 ; Galsurker et al, 2017 , 2018 , 2020) ; this approach now provides greater power to investigate transcriptome changes with superior genome coverage and sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Transcriptome and phytohormone changes associated with ethylene-induced onion bulb dormancy

Alamar

Anastasiadi

López-Cobollo

et al. 2020

Postharvest Biology and Technology

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Highlights A de novo onion transcriptome was developed to investigate dormancy transition. Continuous ethylene induced a climacteric-like respiration peak in stored onions. Ethylene upregulated ethylene biosynthesis transcripts, ACO1 , in onion baseplates. The ABA biosynthesis gene NCED was upregulated under ethylene supplementation. t ZRP and IPRP are potential markers of onion dormancy status.

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“…The morphology of the onion bulb is composed of scales ordered according to chronological age; the internal scales are younger and the external scales are older [10]. An onion bulb at physiological maturity is formed by one to three dry skins that surround thin, sequential outer scales.…”

Section: Introductionmentioning

confidence: 99%

“…An onion bulb at physiological maturity is formed by one to three dry skins that surround thin, sequential outer scales. These, enclosing several internal and fleshy scales [10,11].…”

Section: Introductionmentioning

confidence: 99%

“…This results in crops with plants at different stages, making it difficult to determine the harvesting time and reducing bulb quality during storage [9]. The quality of the onion bulbs is evaluated basically by the color of the bulb and the contents of sugars, organic acids and phenolic compounds that confer characteristic flavor, aroma and color [10,9,11]. These quality characteristics are influenced by the harvest period.…”

Section: Introductionmentioning

confidence: 99%

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The Harvest Season Changes the Organoleptic Properties of Onion during Storage

Mota

Cruz

Ferreira

et al. 2019

JEAI

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Aims: The objective was to determine the influence of the onion harvest time "Baia Periforme" on post-harvest quality of the bulbs during storage. Study Design: The experiment was conducted in a randomized block design with three treatments, six replicates with two bulbs each. Place and Duration of Study: Departamento de Fitotecnia, Universidade Federal de Viçosa, between June 2017 and July 2018. Methodology: Seedlings, 20 days old, were transplanted into 20 cm spacing between rows and 10 cm between plants. The bulbs were harvested 120 days after transplanting with manual tipping of the pseudo-stem (T1), with 50 (T2) or 75% (T3) of the bulbs popped. The soluble sugars (SS), non-reducing sugars (NRS), reducing sugars (RS), total soluble solids (TSS), titratable acidity of phenolic compounds and alinase activity was determined every 30 days for 90 days. Results: The content of SS, TSS, phenolic compounds and alinase activity increased in the onions of T2, resulting in more sweet and pungent bulbs due to the higher content of acidity and phenolic compounds. Conclusion: The post-harvest quality of onion bulbs "Baia Periforme" was maintained when they were harvested with 50% of bulbs popped.

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Differential response to heat stress in outer and inner onion bulb scales

Abstract: Differential gene expression in the outer and inner scales of onion bulbs in response to heat stress accounts for the fact that only outer scales can form a protective dry brown skin.

Cited by 16 publications

References 81 publications

Comparative transcriptome analyses in contrasting onion (Allium cepa L.) genotypes for drought stress

Comparative transcriptome analyses in contrasting onion (Allium cepa L.) genotypes for drought stress

Transcriptome and phytohormone changes associated with ethylene-induced onion bulb dormancy

The Harvest Season Changes the Organoleptic Properties of Onion during Storage

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