Anatomical development of the pericarp and seed of Oncidium flexuosum Sims (ORCHIDACEAE)

Mayer, Juliana Lischka Sampaio; Carmello-Guerreiro, Sandra Maria; Appezzato‐da‐Glória, Beatriz

doi:10.1016/j.flora.2011.01.009

Cited by 24 publications

(26 citation statements)

References 34 publications

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“…Fluorescence was also observed in the carapax. The same conclusion was drawn by Mayer et al (2011) after staining with the classic lipid indicator Sudan IV. Thus, there is some controversy as to the exact chemical nature of the testa, and it could very well vary among the many members of the orchid family.…”

supporting

confidence: 68%

Composition of Cypripedium calceolus (Orchidaceae) seeds analyzed by attenuated total reflectance IR spectroscopy: In search of understanding longevity in the ground

Barsberg

Rasmussen

Kodahl

2013

American J of Botany

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supporting

confidence: 68%

Composition of Cypripedium calceolus (Orchidaceae) seeds analyzed by attenuated total reflectance IR spectroscopy: In search of understanding longevity in the ground

Barsberg

Rasmussen

Kodahl

2013

American J of Botany

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“…Epiphytic orchids often have trichomes or elaters (Cribb 1999). The intra-ovarian and endocarpic trichomes have scarcely been studied in Orchidaceae; they have only been described in Aeridiinae (Hallé 1986), some Angraecinae (Freudenstein and Rasmussen 1999), and one member of Oncidiinae Oncidium flexuosum (Mayer et al 2011). The vascularization of the pistil is another issue incipiently discussed in Orchidaceae.…”

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

“…The measurements were performed using the NIS-Element AR 3.1. We follow the proposals for the terminology used in anatomical descriptions by Swamy (1948), Lavarack (1971), Walker (1975), Sterling (1974Sterling ( , 1977Sterling ( , 1978, Clifford and Owens (1990), Zhang and O'Neill (1993), Stern et al (1993), Gasser and Robinson-Beers (1993), Kocyan and Endress (2001), Rasmussen and Johansen (2006), Tsai et al (2008), Endress (2011), and Mayer et al (2011).…”

Section: Anatomical Studymentioning

confidence: 99%

“…The intra-ovarian trichomes appeared on the placenta of ovules with poorly differentiated cells located in the midovary region of Vanda. To describe the type of trichomes, we considered the theories proposed by some authors that indicate that the development of the ovary occurs after fertilization (Clifford and Owens 1990;Zhang and O'Neill 1993;Tsai et al 2008;Mayer et al 2011). In addition, Zhang and O'Neill (1993) described the development of hair cells emerging from the endocarp after pollination during the development of the fruit.…”

Section: Pistilmentioning

confidence: 99%

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Variation and evolutionary transformation of some characters of the pollinarium and pistil in Epidendroideae (Orchidaceae)

2019

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We studied the variation in the pollinarium and pistil of Epidendroideae and reconstructed the ancestral states of the characters (pollinia number, pollinium orientation, pollinium with suture, and pollinium texture). The pollinarium is complete (formed by pollinium, caudicle, stipe, and viscidium) in Vandeae, Epidendreae, and Cymbidieae, but the caudicle is absent in some Aeridinae and the viscidium in Laeliinae and Pleurothallidinae. Neottieae, Arethuseae, Sobralieae, Epidendreae, and Xerorchideae included some genera having sessile pollinia. The more frequent state in the family is to have two pollinia, followed by four, eight, and six pollinia. The pistil is unilocular, although it seems to have experienced reversals several times within Epidendroideae because intermediate states were observed (e.g. Vanda and Angraecum). In these cases, a prolongation of the placental tissue is developed that in Huntleya and Peristeria make contact but do not fuse. Most members of the subfamily have pistil composed of three carpels divided into six emerging valves, but only three are fertile. In Cattleya and Sophronitis the sterile valves are much reduced and the pistil seems to have only three valves. We have generated useful and valuable information to understand the evolution of the reproductive organs in Epidendroideae. Probably, these transformations in the pollinarium and pistil have co-evolved in tandem with pollinators to make the pollination more efficient. Our results suggest that the common ancestor of Epidendroideae had a complete pollinarium, formed probably of four juxtaposed granular pollinia without suture, bearing caudicle, tegular stipe and viscidium, but several early transformations occurred during the Epidendroideae diversification.

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“…Although a number of researches have revealed that the harvesting time of seeds can significantly influence seed germination in vitro in many wild orchids [12][13][14][15], it is still difficult to determine the opportune harvesting time for distant hybrid seeds of Chinese orchids and no study has elucidated the reason for this. Orchids always produce large amounts of tiny seeds, with undifferentiated embryos containing some lipid droplets and proteins, and each capsule can contain up to four million seeds [16][17][18]. It is very difficult to identify the quality of developing hybrid seeds with the naked eye.…”

Section: Introductionmentioning

confidence: 99%

Embryo development and corresponding factors affecting in vitro germination of Cymbidium faberi × C. sinense hybrid seeds

Li¹,

JianZhong²,

Sun³

et al. 2016

ARCH BIOL SCI BELGRA

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A better understanding of embryo development would provide insights into seed quality and subsequent germination events in the interspecific hybridization of Cymbidium faberi 'Jiepeimei' × C. sinense 'Qijianheimo'. At the mature stage, 26.1% of the ovules were abnormal. Most of the hybrid embryos could develop normally. Abortions mainly occurred at the zygote (9.5%) and 2-4-celled embryo (15.1%) stages. No germination was observed at 90 and 105 days after pollination (DAP), when the embryo was at the early globular stage, with abundant organelles but no storage materials. During 110-130 DAP, the globular embryo was formed and the starch grains began to accumulate in plastids. The hybrid seeds collected at 120 DAP showed initiation of germination. Germination significantly increased at 135 DAP and was maximal at 150 DAP, during which period the hybrid embryos developed into the late globular stage. The storage materials, i.e. lipid and protein bodies, began to accumulate and the filamentary structures derived from suspensor cells still persisted. After the seeds matured (160 DAP), the germination percentage declined sharply. Safranin staining revealed that the outer seed coat was totally cuticularized and the inner seed coat appeared as a cuticle layer enclosing the embryo proper tightly, which may be the main factor inhibiting the subsequent germination of hybrid seeds. In conclusion, 150 DAP should be the opportune time for the in vitro germination of C. faberi 'Jiepeimei' × C. sinense 'Qijianheimo' hybrid seeds.

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Anatomical development of the pericarp and seed of Oncidium flexuosum Sims (ORCHIDACEAE)

Cited by 24 publications

References 34 publications

Composition of Cypripedium calceolus (Orchidaceae) seeds analyzed by attenuated total reflectance IR spectroscopy: In search of understanding longevity in the ground

Composition of Cypripedium calceolus (Orchidaceae) seeds analyzed by attenuated total reflectance IR spectroscopy: In search of understanding longevity in the ground

Variation and evolutionary transformation of some characters of the pollinarium and pistil in Epidendroideae (Orchidaceae)

Embryo development and corresponding factors affecting in vitro germination of Cymbidium faberi × C. sinense hybrid seeds

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