A Phase Approach Towards Floral Formation in Lychee

Huang, H.B.; Chen, H.B.

doi:10.17660/actahortic.2005.665.20

Cited by 21 publications

(8 citation statements)

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“…two ecological groups: 'cultivars of high chilling requirements' and 'cultivars of low chilling requirements', based on the quantitative nature of temperature requirements for successful floral induction [15]. Although this study was conducted under field conditions with wide temperature fluctuations, the exposure time (7 to 13 weeks) to low temperature required by the litchi cultivars were quite close to findings made by other authors under glasshouse conditions.…”

Section: Table IIIsupporting

confidence: 75%

“…Consequently, 'Tai So' and 'Yook Ho Pow' started to initiate floral panicles earlier (mid-June) than the other cultivars (late June onwards). Other research studies have also reported that litchi cultivars differ in their chilling requirements prior to flowering [12][13][14][15]. In Thailand, litchi cultivars are subdivided into two groups: lowland cultivars, which do not require a long period of cool temperature to flower, and upland cultivars, which need longer periods of cool temperature [13].…”

Section: Flowering Behaviour Of Studied Cultivarsmentioning

confidence: 99%

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Phenotypic and molecular diversity of litchi cultivars in Mauritius

Madhou¹,

Bahorun²,

Hormaza³

2010

Fruits

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-Introduction. Litchi has gained considerable economic importance in Mauritius as it is highly prized on the local and export markets for its size, colour and flavour, although no characterisation work has been performed so far. Materials and methods. In order to optimise litchi germplasm management in Mauritius, we evaluated 34 litchi accessions from three different agroclimatic regions. Phenotypic and morphological characters, and microsatellite markers were studied. Results and discussion. Phenological observations conducted over four consecutive fruiting cycles (2003/2004 to 2006/2007) showed that accessions could be grouped into early-and late-flowering cultivars, which initiated floral panicles from June to July and July to August, respectively. The harvesting season of litchi lasted from mid-November to mid-January with early-maturing cultivars being ready for harvest in the first month of the season. Phenological characters and fruit characterisation showed that the newly-introduced cultivar 'Yook Ho Pow' had a high commercial potential. Molecular studies using twelve pairs of SSR primers showed that, despite phenotypic variations among 'Tai So' genotypes in different locations (such as percentage of chicken-tongued seeds and leaflet size), the SSR profiles of leaf samples from all the studied 'Tai So' accessions were identical, suggesting that phenotypic differences could probably be attributed to environmental conditions rather than to genetic variations. Molecular characterisation revealed different cases of synonymies and homonymies in the genotypes studied. La saison de récolte du litchi a duré de la mi-novembre à mi-janvier, les varié-tés précoces ayant été récoltables dès le premier mois de la campagne. Les caractères phéno-logiques et la caractérisation des fruits a montré que le cultivar nouvellement introduit 'Yook Ho Pow' avait un fort potentiel commercial. Des études moléculaires utilisant douze paires d'amorces de RSS ont montré que, malgré les variations phénotypiques chez les génotypes de 'Tai So' dans différents environnements (tels que le pourcentage de noyaux 'langue de poulet' ou la taille du foliole), les profils de RSS des échantillons de feuilles de toutes les accessions de 'Tai So' étudiées étaient identiques ; cela suggèrerait que les différences phénotypiques observées pourraient être attribuables aux conditions environnementales plutôt qu'à des variations génétiques. La caractérisation moléculaire a révélé différents cas de synonymies et homonymies dans les génotypes étudiés.Mauritius / Sapindaceae / Litchi chinensis / caractère agronomique / microsatellite / phénologie / RSS

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Section: Table IIIsupporting

confidence: 75%

Section: Flowering Behaviour Of Studied Cultivarsmentioning

confidence: 99%

Phenotypic and molecular diversity of litchi cultivars in Mauritius

Madhou¹,

Bahorun²,

Hormaza³

2010

Fruits

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“…In the following spring, the apical buds will break and elongate as the air temperature and soil moisture rise. Next, the axillary or apical panicle primordia will emerge and become visible as “whitish millets” [ 3 ]. At this millet stage, floral buds are considered to be mixed buds containing axillary or apical panicle primordia, leaf primordia and rudimentary leaves.…”

Section: Introductionmentioning

confidence: 99%

De novo transcriptome assembly for rudimentary leaves in Litchi chinesis Sonn. and identification of differentially expressed genes in response to reactive oxygen species

Kim

Zhong

et al. 2014

BMC Genomics

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BackgroundLitchi is an evergreen woody tree widely cultivated in subtropical and tropical regions. Defective flowering is a major challenge for litchi production in time of climate change and global warming. Previous studies have shown that high temperature conditions encourage the growth of rudimentary leaves in panicles and suppress litchi flowering, while reactive oxygen species (ROS) generated by methyl viologen dichloride hydrate (MV) promote flowering and abortion of rudimentary leaves. To understand the molecular function of the ROS-induced abortion of rudimentary leaves in litchi, we sequenced and de novo assembled the litchi transcriptome.ResultsOur assembly encompassed 82,036 unigenes with a mean size of 710 bp, and over 58% (47,596) of unigenes showed significant similarities to known sequences in GenBank non-redundant (nr) protein database. 5,865 unigenes were found to be differentially expressed between ROS-treated and un-treated rudimentary leaves, and genes encoding signaling components of plant hormones such as ABA and ethylene were significantly enriched.ConclusionOur transcriptome data represents the comprehensive collection of expressed sequence tags (ESTs) of litchi leaves, which is a vital resource for future studies on the genomics of litchi and other closely related species. The identified differentially expressed genes also provided potential candidates for functional analysis of genes involved in litchi flowering underlying the control of rudimentary leaves in the panicles.Electronic supplementary materialThe online version of this article (doi:10.1186/1471-2164-15-805) contains supplementary material, which is available to authorized users.

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“…1). Samples were collected at five stages of floral formation according to Huang and Chen (2005). After the terminal shoots had just matured, the AMs of 'Sanyuehong' were collected on 15 Sept. 2015 as prefloral induction stage (PFId).…”

Section: Methodsmentioning

confidence: 99%

Litchi Flowering is Regulated by Expression of Short Vegetative Phase Genes

Hu¹,

Kim²,

Chen³

et al. 2018

J. Amer. Soc. Hort. Sci.

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Short vegetative phase (SVP), a MADS-domain transcription factor, was shown to act as a repressor of flowering in arabidopsis (Arabidopsis thaliana). Although the role of SVPs in flowering is well characterized in the model plant arabidopsis, little is known in evergreen woody litchi (Litchi chinensis). In this study, three litchi SVP homologs (LcSVP1, LcSVP2, and LcSVP3) were cloned, and the bioinformatic analysis of the LcSVPs was carried out to identify their molecular characteristics. Their expression patterns in the apical meristem (AM) during the transition from vegetative to reproductive phase were studied under natural flowering inductive conditions. Also, brassinosteroid (BR) treatment under low temperature conditions was performed to elucidate the role of LcSVPs in the BR-regulated flowering. The results showed that LcSVPs belonged to the MADS superfamily. LcSVP relative expression levels in AMs of the early- and late-flowering cultivars showed decreasing trends with the transition from vegetative to reproductive growth. Under low temperature condition, relative expression levels of LcSVP1, LcSVP2, and LcSVP3 in AMs or panicle primordia showed decreasing trends, whereas those in the AMs of the BR-treated trees remained at relatively high levels. Relative expression analysis of the litchi homolog, flowering locus t 1 (LcFT1), showed that the BR-treated leaves had lower relative expression level than nontreated control leaves. The findings suggest that LcSVPs act as repressors involved in flowering in natural conditions and the BR-regulated flowering.

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A Phase Approach Towards Floral Formation in Lychee

Cited by 21 publications

References 0 publications

Phenotypic and molecular diversity of litchi cultivars in Mauritius

Phenotypic and molecular diversity of litchi cultivars in Mauritius

De novo transcriptome assembly for rudimentary leaves in Litchi chinesis Sonn. and identification of differentially expressed genes in response to reactive oxygen species

Litchi Flowering is Regulated by Expression of Short Vegetative Phase Genes

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