Pollen viability and the preliminary study of pollen preservation method of Amorphophallus koratensis Gagnep. (Araceae), the potential exotic ornamental plant

Alpinia spp. play an important ecological role as a source of nectar in the understory of tropical and subtropical forests, where many of these species are common. The perennial species Alpinia purpurata (Vieill.) K. Schum. is native to the tropical rainforests of Asia and has been used as an ornamental cut plant due to its lush inflorescences and post-harvest durability. The internal and external morphology, floral biology, and reproductive system of four A. purpurata cultivars were investigated in order to contribute to studies of genetic improvement of the species. The inflorescence of A. purpurata is terminal, globose, and has flowers protected by colorful and showy bracts. The white flowers are tubular bisexual. The floral anthesis of the four cultivars lasted 9 to 12 h and pollen viability was above 80% throughout the pre-flowering period in all cultivars evaluated. During anthesis, stigma and anther crest were receptive due to the presence of stigmatic fluid. Fruiting of the cultivars was observed after hand cross-pollination, whereas no fruiting was recorded in treatments involving spontaneous self-pollination, hand self-pollination or geitonogamy. Natural pollination induced low fruiting, suggesting low pollinator availability in the studied area. The obligatory xenogamy of A. purpurata is a facilitator for the development of new hybrids for the ornamental plant market.

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Reproductive strategy in the Ranunculus auricomus complex (ranunculaceae)

Acta Societatis Botanicorum Poloniae ◽

10.5586/asbp.1996.029 ◽

2014 ◽

Vol 65 (1-2) ◽

pp. 167-170 ◽

Cited By ~ 17

Author(s):

Romana Izmaiłow

Keyword(s):

Reproductive Strategy ◽

Pollen Viability ◽

Pollen Grains ◽

Morphological Characters ◽

Mode Of Reproduction ◽

Individual Level ◽

Level Number ◽

Preliminary Study ◽

The Individual ◽

Plant Pollen

A preliminary study of reproductive strategy was carried out on plants representing four cytotypes of the <em>Ranunculus auricomus</em> complex. Diploid plants reproduce sexually, triploids, tetraploids and hexaploids have an apomictic mode of reproduction (apospory combined with pseudogamy). Some morphological characters of the plants connected with reproduction were analyzed at various phases and compared in two successive seasons. The following characters were estimated at the individual level: number of ovules and primary pollen grains per plant, pollen viability, pollen-ovule ratio, number of achenes per plant and their germinability, seed-ovule ratio. Most of data characteristic of reproductive strategy were calculated according to the formulae proposed by Urbańska (1989, 1990). Apomictic cytotypes have both a significantly lower pollen viability and seed-ovule ratio (the lowest values in triploids) than sexual diploids.

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The infection of pollen by zoosporic fungi in tropical soils and its impact on pollen preservation: A preliminary study

Nova Hedwigia ◽

10.1127/0029-5035/2011/0092-0233 ◽

2011 ◽

Vol 92 (1) ◽

pp. 233-244 ◽

Cited By ~ 7

Author(s):

Wongkot Phuphumirat ◽

Frank H. Gleason ◽

Souwalak Phongpaichit ◽

Dallas C. Mildenhall

Keyword(s):

Tropical Soils ◽

Zoosporic Fungi ◽

Preliminary Study ◽

Pollen Preservation

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The Ultrastructure of Metastatic Human Mammary Carcinoma After Prolonged Estrogen Therapy

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010006091x ◽

1967 ◽

Vol 25 ◽

pp. 180-181

Author(s):

John H.L. Watson ◽

John L. Swedo ◽

R.W. Talley

Keyword(s):

Mammary Carcinoma ◽

Osmium Tetroxide ◽

Estrogen Therapy ◽

Ultrastructural Level ◽

Uranyl Acetate ◽

Human Mammary Carcinoma ◽

Surgical Biopsy ◽

Lead Hydroxide ◽

Preliminary Study ◽

Hormonal Therapies

A preliminary study of human mammary carcinoma on the ultrastructural level is reported for a metastatic, subcutaneous nodule, obtained as a surgical biopsy. The patient's tumor had responded favorably to a series of hormonal therapies, including androgens, estrogens, progestins, and corticoids for recurring nodules over eight years. The pertinent nodule was removed from the region of the gluteal maximus, two weeks following stilbestrol therapy. It was about 1.5 cms in diameter, and was located within the dermis. Pieces from it were fixed immediately in cold fixatives: phosphate buffered osmium tetroxide, glutaraldehyde, and paraformaldehyde. Embedment in each case was in Vestopal W. Contrasting was done with combinations of uranyl acetate and lead hydroxide.

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Fine structure of early degenerating myofibers in the tibialis anterior of young ‘MDX’ mouse

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010010367x ◽

1988 ◽

Vol 46 ◽

pp. 322-323

Author(s):

H.D. Geissinger ◽

C.K. McDonald-Taylor

Keyword(s):

Fine Structure ◽

Muscle Regeneration ◽

Tibialis Anterior ◽

Genetic Defect ◽

Mdx Mouse ◽

Mdx Mice ◽

Histopathological Changes ◽

Electron Microscopic ◽

Dystrophic Mouse ◽

Preliminary Study

A new strain of mice, which had arisen by mutation from a dystrophic mouse colony was designated ‘mdx’, because the genetic defect, which manifests itself in brief periods of muscle destruction followed by episodes of muscle regeneration appears to be X-linked. Further studies of histopathological changes in muscle from ‘mdx’ mice at the light microscopic or electron microscopic levels have been published, but only one preliminary study has been on the tibialis anterior (TA) of ‘mdx’ mice less than four weeks old. Lesions in the ‘mdx’ mice vary between different muscles, and centronucleation of fibers in all muscles studied so far appears to be especially prominent in older mice. Lesions in young ‘mdx’ mice have not been studied extensively, and the results appear to be at variance with one another. The degenerative and regenerative aspects of the lesions in the TA of 23 to 26-day-old ‘mdx’ mice appear to vary quantitatively.

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Ultrastructural observations of the aorta of calves implanted with a mechanical left ventricular assist device

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100161734 ◽

1990 ◽

Vol 48 (3) ◽

pp. 834-835

Author(s):

J P Cassella ◽

V Salih ◽

T R Graham

Keyword(s):

Left Ventricular Assist Device ◽

Ventricular Assist Device ◽

Left Ventricular ◽

Aortic Tissue ◽

Assist Device ◽

Ventricular Assist ◽

Transmission Electron ◽

Left Ventricular Assist ◽

Preliminary Study

Left ventricular assist systems are being developed for eventual long term or permanent implantation as an alternative to heart transplantation in patients unsuitable for or denied the transplant option. Evaluation of the effects of these devices upon normal physiology is required. A preliminary study was conducted to evaluate the morphology of aortic tissue from calves implanted with a pneumatic Left Ventricular Assist device-LVAD. Two 3 month old heifer calves (calf 1 and calf 2) were electively explanted after 128 days and 47 days respectively. Descending thoracic aortic tissue from both animals was removed immediately post mortem and placed into karnovsky’s fixative. The tissue was subsequently processed for transmission electron microscopy (TEM). Some aortic tissue was fixed in neutral buffered formalin and processed for routine light microscopy.

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A preliminary study on the potential of front face fluorescence spectroscopy for the discrimination of Moroccan virgin olive oils and the prediction of their quality

Analytical Methods ◽

10.1039/d0ay01746a ◽

2021 ◽

Author(s):

Hicham Zaroual ◽

El Mestafa El Hadrami ◽

Romdhane Karoui

Keyword(s):

Fluorescence Spectroscopy ◽

Olive Oil ◽

Virgin Olive Oil ◽

Front Face ◽

Virgin Olive Oils ◽

Olive Oils ◽

Preliminary Study

This study examines the feasibility of using front face fluorescence spectroscopy (FFFS) to authenticate 41 virgin olive oil (VOO) samples collected from 5 regions in Morocco during 2 consecutive crop seasons.

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