Meiotic Defects and Premature Tapetal Degeneration Are Involved in the Low Fertility of Oncidesa Gower Ramsey, an Important Cut-flower Orchid

Hu, C. J.; Lee, Nean; Lee, Yung-I

doi:10.21273/hortsci13011-18

Cited by 4 publications

(7 citation statements)

References 29 publications

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“…Defects in anther and tapetum developments and their impact on male fertility have been documented in a number of mutants in A. thaliana (Zhang et al, 2006; Ito et al, 2007; Yang et al, 2007; Zhu et al, 2008; Kim et al, 2010; Gu et al, 2014), rice (Jung et al, 2005; Li et al, 2006), tomato with the male sterile 10 35 ( ms10 35 ) and 7B-1 male-sterile mutants (Jeong et al, 2014; Omidvar et al, 2017), and natural variants in kiwifruit (Falasca et al, 2013) and orchid (Hu et al, 2018). In slhws-1 , reduction in pollen number and lower pollen viability was associated with enlarged and vacuolated tapetal cells ( Figures 8A, D ) similar to the ones described in the ms10 35 and the rmf-1D mutants (Kim et al, 2010; Jeong et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

Functional Disruption of the Tomato Putative Ortholog of HAWAIIAN SKIRT Results in Facultative Parthenocarpy, Reduced Fertility and Leaf Morphological Defects

et al. 2019

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A number of plant microRNAs have been demonstrated to regulate developmental processes by integrating internal and environmental cues. Recently, the Arabidopsis thaliana F-box protein HAWAIIAN SKIRT (HWS) gene has been described for its role in miRNA biogenesis. We have isolated in a forward genetic screen a tomato (Solanum lycopersicum) line mutated in the putative ortholog of HWS. We show that the tomato hws-1 mutant exhibits reduction in leaflet serration, leaflet fusion, some degree of floral organ fusion, and alteration in miRNA levels, similarly to the original A. thaliana hws-1 mutant. We also describe novel phenotypes for hws such as facultative parthenocarpy, reduction in fertility and flowering delay. In slhws-1, the parthenocarpy trait is influenced by temperature, with higher parthenocarpy rate in warmer environmental conditions. Conversely, slhws-1 is able to produce seeds when grown in cooler environment. We show that the reduction in seed production in the mutant is mainly due to a defective male function and that the levels of several miRNAs are increased, in accordance with previous HWS studies, accounting for the abnormal leaf and floral phenotypes as well as the altered flowering and fruit development processes. This is the first study of HWS in fleshy fruit plant, providing new insights in the function of this gene in fruit development.

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Section: Discussionmentioning

confidence: 99%

Functional Disruption of the Tomato Putative Ortholog of HAWAIIAN SKIRT Results in Facultative Parthenocarpy, Reduced Fertility and Leaf Morphological Defects

et al. 2019

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“…Orchids, including Phalaenopsis, also called the moth orchid, are among the most popular ornamental potted plants currently traded around the world 1 . Other famous genera traded are Cymbidium, the Chinese 'lan' orchid 2 ; Dendrobium 3 ; Paphiopedilum, the famous lady slippers 4 ; Oncidium, the dancing-lady orchids 5 ; and Cattleya 6 , among many others.…”

Section: Introductionmentioning

confidence: 99%

“…To remain competitive, new orchid cultivars must be developed continuously to meet the market demands 5 . Usually, both wild species and commercial cultivars are chosen as parent plants in breeding programs that rely on interspecific hybridization and selection of progenies 1 because sexual reproduction may increase heterosis and diversity of traits 2 , including flower longevity 6 .…”

Section: Introductionmentioning

confidence: 99%

Polyploidy in Orchid Breeding, Advances and Perspectives

Bolaños-Villegas¹,

Chen²

2022

Preprint

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The orchid market is a dynamic horticultural business in which novelty and beauty command high prices. The development of miniature to large and showy flowers, in addition to fragrance, is mainly of interest. Overall organ size might be modified by doubling the chromosome number, which can be accomplished by careful study of meiotic chromosome disjunction in hybrids or species. Meiosis is the process in which diploid (2n) pollen mother cells recombine their DNA sequences and then undergo two rounds of division to give rise to four haploid (n) cells called sporads. Thus, by interfering in chromosome segregation, one can induce the development of diploid recombinant sporads called dyads. These dyads may be used for breeding polyploid progenies with enhanced fertility and large flower size. This review gives an overview of developments in orchid breeding placed in the large context of ploidy breeding in higher plants to facilitate innovation

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“…Orchids, including Phalaenopsis (2n = 2x = 38) [ 1 ] ( Figure 1 A), also called the moth orchid, are among the most popular ornamental potted plants currently traded around the world [ 2 ]. Other famous genera traded are Cymbidium , the Chinese ‘ lan ’ orchid (2n = 2x = 40) [ 3 ] ( Figure 1 B and C); Dendrobium (2n = 2x = 38) [ 4 ] ( Figure 1 D); Paphiopedilum (2n = 2x = 26), the famous lady slippers [ 5 ] ( Figure 1 E); Oncidium (section Oncidium , 2n = 2x = 42), the dancing-lady orchids [ 6 ] ( Figure 1 F); and Cattleya (2n = 2x = 40) [ 7 , 8 ] ( Figure 1 G), among many others.…”

Section: Introductionmentioning

confidence: 99%

“…To remain competitive, new orchid cultivars must be developed continuously to meet the market demands [ 6 ]. Usually, both wild species and commercial cultivars are chosen as parent plants in breeding programs that rely on interspecific hybridization and selection of progenies [ 2 ] because sexual reproduction may increase heterosis (see Table 1 ) and diversity of traits [ 3 ], including flower longevity [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

Advances and Perspectives for Polyploidy Breeding in Orchids

Bolaños-Villegas

Chen

2022

Plants

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The orchid market is a dynamic horticultural business in which novelty and beauty command high prices. The two main interests are the development of flowers, from the miniature to the large and showy, and their fragrance. Overall organ size might be modified by doubling the chromosome number, which can be accomplished by careful study of meiotic chromosome disjunction in hybrids or species. Meiosis is the process in which diploid (2n) pollen mother cells recombine their DNA sequences and then undergo two rounds of division to give rise to four haploid (n) cells. Thus, by interfering in chromosome segregation, one can induce the development of diploid recombinant cells, called unreduced gametes. These unreduced gametes may be used for breeding polyploid progenies with enhanced fertility and large flower size. This review provides an overview of developments in orchid polyploidy breeding placed in the large context of meiotic chromosome segregation in the model plants Arabidopsis thaliana and Brassica napus to facilitate molecular translational research and horticultural innovation.

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Meiotic Defects and Premature Tapetal Degeneration Are Involved in the Low Fertility of Oncidesa Gower Ramsey, an Important Cut-flower Orchid

Cited by 4 publications

References 29 publications

Functional Disruption of the Tomato Putative Ortholog of HAWAIIAN SKIRT Results in Facultative Parthenocarpy, Reduced Fertility and Leaf Morphological Defects

Functional Disruption of the Tomato Putative Ortholog of HAWAIIAN SKIRT Results in Facultative Parthenocarpy, Reduced Fertility and Leaf Morphological Defects

Polyploidy in Orchid Breeding, Advances and Perspectives

Advances and Perspectives for Polyploidy Breeding in Orchids

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