Low Temperature Requirements for Floral Induction in Lychee

Chen, H.B.; Huang, He

doi:10.17660/actahortic.2005.665.21

Cited by 40 publications

(22 citation statements)

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“…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%

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: 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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“…Litchi is an evergreen fruit tree commercially cultivated in southern Asia, South Africa, and Australia. Floral initiation in litchi is triggered by low temperatures and enhanced by drought in autumn and winter [1][2][3]. Litchi trees grown in controlled growth chambers with stably low temperature can produce large and high-quality panicles.…”

Section: Introductionmentioning

confidence: 99%

Genome-Wide Transcriptomic Analysis Reveals a Regulatory Network of Oxidative Stress-Induced Flowering Signals Produced in Litchi Leaves

Lü

et al. 2020

Genes

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Litchi is an important subtropical fruit tree that requires an appropriately low temperature to trigger floral initiation. Our previous studies have shown that reactive oxygen species (ROS) are involved in litchi flowering. To identify oxidative stress-induced flowering related genes in leaves, 'Nuomici' potted trees were grown at medium low-temperature conditions (18/13 • C for day/night, medium-temperature). The trees were treated with the ROS generator methyl viologen dichloride hydrate (MV) as the MV-generated ROS treatment (MM, medium-temperature plus MV) and water as the control treatment (M, medium-temperature plus water). Sixteen RNA-sequencing libraries were constructed, and each library generated more than 5,000,000 clean reads. A total of 517 differentially expressed genes (DEGs) were obtained. Among those DEGs, plant hormone biosynthesis and signal transduction genes, ROS-specific transcription factors, such as AP2/ERF and WRKY genes, stress response genes, and flowering-related genes FLOWERING LOCUS T1 (FT1) and FLOWERING LOCUS T2 (FT2) were significantly enriched. Then, as a confirmatory experiment, the potted trees were uniformly sprayed with MV, N,N'-dimethylthiourea (DMTU, ROS scavenger) plus MV, and water at medium-temperature. The results showed that the MV-generated ROS promoted flowering and changed related gene expression, but these effects were repressed by DMTU treatment. The results of our studies indicate that ROS could promote flowering and partly bypass chilling for litchi flowering.

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“…Litchi is an evergreen fruit tree commercially cultivated in southern Asia, South Africa, and Australia. Floral initiation in litchi is triggered by low temperatures and enhanced by drought in autumn and winter (Menzel and Simpson 1988, Chen and Huang 2005, Zhou et al 2014. Litchi trees grown in controlled growth chambers with stably low temperature can produce big and high quality panicles (Lu et al 2017).…”

mentioning

confidence: 99%

Comparative proteomics of phloem exudates reveals long-distance signals potentially involved in Litchi chinensis flowering

Huang¹,

Chen²,

Hu³

et al. 2020

Biol. plant.

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It is well known that phloem is essential for transporting proteins as long-distance signals. In this study, a proteomic approach was carried out to identify proteins accumulated in phloem exudates at the pre-floral induction (PFId) stage, at the floral induction (FId) stage, and at the floral initiation (FIn) stage. As a result, 45 phloem exudate proteins were detected. Six proteins were found at all three stages. Sixteen proteins were specific to the PFId stage, 14 proteins were specific to the FId and FIn stages. From the enriched gene ontology (GO)-terms related to transport, signaling, hormone, and development, 12 transport-related, 5 signaling-related, 10 hormone-related, and 9 development-related proteins were identified. It was found that arginine glycine glycine repeats nuclear RNA binding protein A (RGGA) was specific to the FId stage whereas heat shock protein 90-7, plasma membrane intrinsic protein 1-4, and the homolog protein encoded by At4g27190 were specific to the FIn stage. The relative abundances of sporulation protein F10D13.7 and ATP-dependent binding casette transporter G family member 37 were higher at the FId stage than at the PFId stage, and that of enolase 2 was higher at the FIn stage than at the PFId stage, suggesting that these phloem exudate proteins might act as long-distance signals involved in the transition from vegetative growth to reproductive growth in litchi. This study contributes to the comparative proteomic analysis of plant phloem sap, which will provide insights into proteins involved in floral induction as well as inter-organ communication during development in litchi.

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Low Temperature Requirements for Floral Induction in Lychee

Cited by 40 publications

References 0 publications

Phenotypic and molecular diversity of litchi cultivars in Mauritius

Phenotypic and molecular diversity of litchi cultivars in Mauritius

Genome-Wide Transcriptomic Analysis Reveals a Regulatory Network of Oxidative Stress-Induced Flowering Signals Produced in Litchi Leaves

Comparative proteomics of phloem exudates reveals long-distance signals potentially involved in Litchi chinensis flowering

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