scholarly journals The rare and endangered orchid Cypripedium calceolus L. in Croatia - refound in Gorski Kotar (West Croatia) after 126 years

2020 ◽  
Vol 29 (1) ◽  
pp. 55-62
Author(s):  
Marta Justić ◽  
◽  
Marija Bučar ◽  
Petra Vizec ◽  
Ana Vukres ◽  
...  
Keyword(s):  
Endangered Orchid ◽  
Rare And Endangered ◽  
Cypripedium Calceolus

scholarly journals Proliferation of Protocorm-Like Bodies of Dendrobium mannii and Dendrobium mirbelianum in Chitosan-containing Media In Vitro

2016 ◽  
Vol 2 (3) ◽  
pp. 22-28 ◽  
Author(s):  
Syifaur Rahmah ◽  
Ni Made Armini Wiendi ◽  
Willy B. Suwarno ◽  
Krisantini Krisantini
Keyword(s):  
Adverse Effects ◽  
Fresh Weight ◽  
Orchid Species ◽  
Endangered Orchid ◽  
Micro Propagation ◽  
Rare And Endangered

Dendrobium mannii and Dendrobium mirbelianum were rare and endangered orchid species. In vitro micro propagation could be used to conserve and proliferate these species. The aims of this study were to determine the effects of chitosan on proliferation of the protocorm-like-bodies (PLBs) of in vitro grown Dendrobium mannii and D. mirbelianum. Chitosan has been reported as an important component to promote orchid growth in vitro. In this study chitosan was included in the in-vitro media at the concentrations of 0, 1, 2, 3, and 4 mg.L-1. The highest PLBs formation, clump diameter, and fresh weight on D. mannii were obtained from explants cultured on medium supplemented with 1 mg.L-1 chitosan. After 14 weeks of culture, fresh weight, clump diameter and average number of PLBs of D.mannii were 29.52 %, 33.00 % and 35.88% greater at chitosan (1 mg.L-1) compared to control media.  D. mirbelianum treated with low chitosan concentrations (1 and 2 mg.L-1) had 65.71% more leaves than those without chitosan treatment. Chitosan, however, had an adverse effects on growth of both species at  4 mg.L-1. Medium contain 4 mg.L-1 chitosan induced PLBs proliferation of D.mannii, but inhibited PLBs proliferation of D.mirbelianum.  These results suggested that chitosan had important roles in PLB proliferation and could be used for the propagation of D. mannii PLBs in vitro. Keywords: rare orchid species, in-vitro

scholarly journals Conservation and reintroduction of the rare and endangered orchid Paphiopedilum armeniacum

2021 ◽  
Vol 7 (1) ◽  
pp. 1903817
Author(s):  
Meina Wang ◽  
Suzhen Li ◽  
Lijun Chen ◽  
Jian Li ◽  
Liqiang Li ◽  
...  
Keyword(s):  
Endangered Orchid ◽  
Rare And Endangered

scholarly journals Effects of forest stand structure on population of endangered orchid species Cypripedium calceolus L

2021 ◽  
pp. 126089
Author(s):  
Kacper Foremnik ◽  
Wojciech Krawczyk ◽  
Bartłomiej Surmacz ◽  
Marek Malicki ◽  
Tomasz Suchan ◽  
...  
Keyword(s):  
Stand Structure ◽  
Forest Stand ◽  
Orchid Species ◽  
Endangered Orchid ◽  
Forest Stand Structure ◽  
Cypripedium Calceolus

Rhizoctonia fungi enhance the growth of the endangered orchid Cymbidium goeringii

Botany ◽  
2010 ◽  
Vol 88 (1) ◽  
pp. 20-29 ◽  
Author(s):  
Jianrong Wu ◽  
Huancheng Ma ◽  
Mei Lü ◽  
Sufen Han ◽  
Youyong Zhu ◽  
...  
Keyword(s):  
Ornamental Plants ◽  
Natural Populations ◽  
Fungal Strains ◽  
Endangered Orchid ◽  
Commercial Cultivation ◽  
The Family ◽  
Cymbidium Goeringii ◽  
Rare And Endangered ◽  
Number Of Leaves ◽  
Taxonomic Groups

Orchids are among the most prized ornamental plants in many societies throughout the world. As a result, consumer demands have created a significant pressure on wild populations of many species, including Cymbidium goeringii Rchb. f., a rare terrestrial orchid endemic in China, Korea, and Japan. To help conserve natural populations of C. goeringii, we recently started investigating methods to cultivate these orchids. Here we fulfilled Koch’s postulates and demonstrated that fungal strains isolated from the roots of natural Cymbidium plants increased fresh mass, plant height, number of leaves, and root length of C. goeringii, and that the two fungal strains originally isolated from C. goeringii showed overall greater effects on growth than two other strains from other Cymbidium species. Internal transcribed spacer sequence analyses revealed that the four fungal strains likely represented at least two new taxonomic groups, both belonging to the family Ceratobasidiaceae of the Rhizoctonia fungi. Our study demonstrated that these fungal strains could potentially help the commercial cultivation of the increasingly rare and endangered orchid C. goeringii.

Cryobanking of Amphibian Genetic Recourses in Russia: Past and Future

2019 ◽  
Vol 26 (6) ◽  
pp. 319-324
Author(s):  
Victor K. Uteshev ◽  
Edith N. Gakhova ◽  
Ludmila I. Kramarova ◽  
Natalia V. Shishova ◽  
Svetlana A. Kaurova ◽  
...  
Keyword(s):  
Genetic Material ◽  
Reproductive Technologies ◽  
Cell Biophysics ◽  
Amphibian Species ◽  
Modern Biology ◽  
Rare And Endangered Species ◽  
Long Term Storage ◽  
Current State ◽  
Rare And Endangered ◽  
Academy Of Sciences

In modern biology, a search for efficient and safe ways of long-term storage of animal genomes is vital for the survival of rare and endangered species. To date, the only reliable method of prolonging the preservation of genome is deep freezing of somatic and reproductive cells, including spermatozoa. Here we overview the current state of reproductive technologies and present the cryopresevation strategies of genetic material of selected amphibian species. These strategies were developed at the Institute of Cell Biophysics, Russian Academy of Sciences, Pushchino, Russia. Cryopreservation could help managing the threatened populations of amphibian species through genome storage and mediate the production of healthy animals from the stored material.

The steppe-meadows of the order Galietalia veri Mirkin et Naumova 1986 in the South Urals

2003 ◽  
pp. 62-80 ◽  
Author(s):  
S. M. Yamalov ◽  
A. A. Filinov ◽  
A. I. Solomeshch
Keyword(s):  
South Urals ◽  
The South ◽  
Nature Protection ◽  
Rare And Endangered ◽  
Steppe Meadow

The five new steppe-meadow associations are des­cribed in the South Urals. They refer to the class Molinio-Arrhenatheretea R. Tx. 1937 em. R. Tx. 1970, ord. Galietalia veri Mirkin et Naumova 1986, all. Trifolion montani Naumova 1986, and the suball. Trifolienion montani Mirkin et Naumova 1986. The communities of these associations are typical of their richness in species, including such rare and endangered ones as Dianthus acicularis, Stipa korshinskyi, Stipa sareptana, Stipa zalesski, Stipa pennata, Stipa da­syphylla, Tulipa biebersteiniana etc., the fact which makes for their significant value for nature protection purposes.

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