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Changes in the expression of photoperiodic bulbing genes in response to increasing daylength in long-day and short-day onion varieties
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Cheng, Wei, Rashid, Md. Harun Ar and Thomas, Brian (2021) Changes in the expression of photoperiodic bulbing genes in response to increasing daylength in long-day and short-day onion varieties. The Journal of Horticultural Science and Biotechnology, 96 (6). pp. 718-727. doi:10.1080/14620316.2021.1928556 ISSN 2380-4084.
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WRAP-changes-expression-photoperiodic-bulbing-genes-response-increasing-daylength-long-day-short-day-onion-varieties-Thomas-2021.pdf - Accepted Version - Requires a PDF viewer. Download (1022Kb) | Preview |
Official URL: http://dx.doi.org/10.1080/14620316.2021.1928556
Abstract
Onion bulb initiation is photoperiod-dependent. Understanding this is crucial for adapting new varieties for growth at different latitudes, as well as aiding germplasm screening for the choice of current varieties. This study aims to gain further understanding of the molecular mechanisms involved in onion bulbing process based on the parallels with well-characterised functional clock genes in the Arabidopsis flowering pathway. A comprehensive set of diurnal quantitative expression experiments was carried out to investigate the bulbing response in two different onion varieties, namely Renate, a long-day variety and Hojem, a short-day variety under increasing intermediate day-lengths. All onion homologous to Arabidopsis flowering time genes showed clear diurnal expression patterns peaking at different times of the day for both long/short-day onions, indicating their role in daylength dependent bulbing process at molecular level. Under intermediate daylengths, AcFT1 expression level increased with daylengths in both varieties, while AcFT4 was expressed in all daylengths. The two genes showed complementary expression with AcFT4 peaking in the morning and AcFT1 in the evening in longer days. The results indicate that AcFT1 and AcFT4 are negatively co-regulated, but AcFT1 is the predominant regulator of bulb formation in response to daylength.
Item Type: | Journal Article | ||||||||
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Subjects: | Q Science > QK Botany | ||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||||||
SWORD Depositor: | Library Publications Router | ||||||||
Library of Congress Subject Headings (LCSH): | Onions -- Growth, Plant photoperiodism, Bulbs (Plant anatomy), Plant genetic regulation | ||||||||
Journal or Publication Title: | The Journal of Horticultural Science and Biotechnology | ||||||||
Publisher: | Informa UK Limited | ||||||||
ISSN: | 2380-4084 | ||||||||
Official Date: | 2021 | ||||||||
Dates: |
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Volume: | 96 | ||||||||
Number: | 6 | ||||||||
Page Range: | pp. 718-727 | ||||||||
DOI: | 10.1080/14620316.2021.1928556 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Reuse Statement (publisher, data, author rights): | This is an Accepted Manuscript of an article published by Taylor & Francis in The Journal of Horticultural Science and Biotechnology on 20 Jun 2021, available online: http://www.tandfonline.com/10.1080/14620316.2021.1928556 | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Date of first compliant deposit: | 19 August 2021 | ||||||||
Date of first compliant Open Access: | 20 June 2022 |
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