Effect of photoperiod and temperature on inflorescence appearance and subsequent development towards flowering in onion raised from sets

Khokhar, K. M.; Hadley, P.; Pearson, Simon

doi:10.1016/j.scienta.2006.12.009

Cited by 20 publications

(25 citation statements)

References 11 publications

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“…Previous work has shown that vernalization is sufficient to induce flowering in onion 19 . Consistent with this, we have found that flowering is induced in onion bulbs stored in the cold (4°C) and dark for 3-4 months ( Supplementary Fig.…”

Section: Resultsmentioning

confidence: 94%

“…In these plants, vernalization results in the upregulation of VRN1 (that encodes a protein similar to the Arabidopsis MADS box transcription factor proteins APETALA1 and FRUITFULL), which in turn downregulates the transcriptional repressor VRN2, allowing FT expression and flowering [16][17][18] . In onion, vernalization is sufficient to induce flowering, although temperature and photoperiod influence the time taken for the inflorescence to appear 19 . Vernalization has not been studied at a molecular level in onion.…”

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confidence: 99%

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FLOWERING LOCUS T genes control onion bulb formation and flowering

et al. 2013

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Onion (Allium cepa L.) is a biennial crop that in temperate regions is planted in the spring and, after a juvenile stage, forms a bulb in response to the lengthening photoperiod of late spring/ summer. The bulb then overwinters and in the next season it flowers and sets seed. FLOWERING LOCUS T (FT) encodes a mobile signaling protein involved in regulating flowering, as well as other aspects of plant development. Here we show that in onions, different FT genes regulate flowering and bulb formation. Flowering is promoted by vernalization and correlates with the upregulation of AcFT2, whereas bulb formation is regulated by two antagonistic FT-like genes. AcFT1 promotes bulb formation, while AcFT4 prevents AcFT1 upregulation and inhibits bulbing in transgenic onions. Long-day photoperiods lead to the downregulation of AcFT4 and the upregulation of AcFT1, and this promotes bulbing. The observation that FT proteins can repress and promote different developmental transitions highlights the evolutionary versatility of FT.

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Section: Resultsmentioning

confidence: 94%

mentioning

confidence: 99%

FLOWERING LOCUS T genes control onion bulb formation and flowering

et al. 2013

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“…This study results revealed that garlic bulbing responded favorably to longer photoperiod and higher temperature. Garlic cultivars variation in bulbing and environmental signals response is observed and is most probably parallel to other Allium species [38][39][40][41][42][43]. In alliaceous crops, bulbing depends on environmental signals, i.e., long photoperiods (lily) and high temperature (onion) [40][41][42][43][44].…”

Section: Effect Of Photoperiod and Temperature On Garlic Plant Growthmentioning

confidence: 99%

Influence of Different Photoperiod and Temperature Regimes on Growth and Bulb Quality of Garlic (Allium sativum L.) Cultivars

et al. 2019

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“…In general, the higher air temperature and lower humidity resulted in greater demand of water for the onion seed crop in latter part of growing period, i.e., during the months of April and May of 2011 and 2010. In fact, it is well known that processes determining the length of crop growth are climate dependent (Khokhar et al, 2007).…”

Section: Climate Conditionsmentioning

confidence: 99%

Onion seed productivity, nutrient use, and quality response to drip fertigation in semi-arid India

Dingre

Pawar

Kale

et al. 2016

Journal of Plant Nutrition

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Crop productivity and nutrient use are mainly water restricted in semiarid regions. This study was conducted to find out whether the onion seed crop productivity could be elevated through drip fertigation. The effects of irrigation and fertigation levels on yield, yield components, quality and nutrient use of onion seed crop (Allium cepa L.) were investigated at MPKV Rahuri, western India on a sandy clay loam soil. Irrigation water applied at evapotranspiration (ETc) levels of 80% (I 1 ), 90% (I 2 ) and 100% (I 3 ) whereas, drip fertigation levels 60 %, 80 %, 100 % and 120 % of recommended dose (120:60:60 nitrogen, phosphorus, potassium (NPK )kg/ha) were investigated. Three-year experiment results showed no significant differences in number of seed/umbel, seed yield/umbel /plant, seed and straw yield ha −1 from the comparison between 100 % ETc and 90 % ETc. In fertigation, 120 and 100 % levels gave significantly higher values of yield components and seed yield than the 80 % and 60 % levels. The quality parameters were decreased with decrease in ETc, but, increased with increase in fertigation levels. Fertilizer use efficiency was highest in 60 % fertigation and then declined with the increase in fertigation levels. Irrigation at 100 % ETc and fertigation @ 120 % resulted into higher nutrient use but the Downloaded by [Nanyang Technological University] at 15:03 14 June 2016 ACCEPTED MANUSCRIPT ACCEPTED MANUSCRIPT2 difference with 90 % ETc and 100 % fertigation was non significant. The 90 % ETc and 100 % fertigation dose (120:60:60 NPK kg/ha) appears a useful practice to increase onion seed productivity under the semi arid climate of western India.

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Effect of photoperiod and temperature on inflorescence appearance and subsequent development towards flowering in onion raised from sets

Cited by 20 publications

References 11 publications

FLOWERING LOCUS T genes control onion bulb formation and flowering

FLOWERING LOCUS T genes control onion bulb formation and flowering

Influence of Different Photoperiod and Temperature Regimes on Growth and Bulb Quality of Garlic (Allium sativum L.) Cultivars

Onion seed productivity, nutrient use, and quality response to drip fertigation in semi-arid India

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