scholarly journals Intraspecific variation in seed germination and storage behaviour of Cordia tree species of subtropical montane forests of Argentina: Implications for ex situ conservation

2019 ◽  
Vol 123 ◽  
pp. 393-399 ◽  
Author(s):  
G. Galíndez ◽  
T. Ledesma ◽  
A. Álvarez ◽  
V. Pastrana-Ignes ◽  
T. Bertuzzi ◽  
...  
Keyword(s):  
Seed Germination ◽  
Intraspecific Variation ◽  
Tree Species ◽  
Ex Situ Conservation ◽  
Ex Situ ◽  
Montane Forests ◽  
And Storage

scholarly journals The reproductive biology of Calligonum L. in relation to ex situ conservation in a botanical garden

2011 ◽  
Vol 63 (3) ◽  
pp. 799-809 ◽  
Author(s):  
Kang Xiaoshan ◽  
Pan Borong ◽  
Duan Shimin ◽  
Shi Wei ◽  
Zhang Yongzhi
Keyword(s):  
Seed Germination ◽  
Ex Situ Conservation ◽  
Flowering Phenology ◽  
Botanical Garden ◽  
Breeding Systems ◽  
Ex Situ ◽  
Germplasm Resources ◽  
Botanic Garden ◽  
Theoretical Support ◽  
Germplasm Resource

In this study, we observed the flowering phenology, breeding system, pollination and seed germination of four species of Calligonum (C. calliphysa, C. rubicundum, C. densum and C. ebinuricum) in the Turpan Eremophytes Botanic Garden, China. Our results showed that the species had overlapping flowering phenologies and were pollinated by similar pollination agents. Their breeding systems were self-compatible, and with signs of outbreeding, but not of hybridization with each other; the main isolation mechanism was post-zygotic isolation and they also had high seed germination rates. Therefore, they are suited to ex situ conservation in the Turpan Eremophytes Botanic Garden, and can supply sufficient seeds for renewal populations and the conservation of germplasm resources. Furthermore, these results provide theoretical support for the construction of a national germplasm resource garden of Calligonum, and for the introduction to the garden of other eremophyteplants and their conservation.

Population Assessment of An Endemic Tree, Croton Scabiosus Bedd. (Euphorbiaceae)

2017 ◽  
Vol 24 (4) ◽  
pp. 209-216
Author(s):  
S. Salamma ◽  
A. Narayanaswamy ◽  
M. Naik ◽  
D. Veeranjaneyulu ◽  
M.V. Babu ◽  
...  
Keyword(s):  
Tree Species ◽  
Random Sampling ◽  
Andhra Pradesh ◽  
Ex Situ Conservation ◽  
Adult Population ◽  
Ex Situ ◽  
Eastern Ghats ◽  
Population Assessment ◽  
Conservation Measures

The population of Croton scabiosus, an endemic tree species of southern Eastern Ghats of Andhra Pradesh, India was assessed through random sampling in 15 localities spread over 8 locations. In sampled 37.5 h area, a total of 8737 mature individuals of Croton scabiosus was recorded. Of the 8 locations, Sanipaya sub population was found stable and considered elite owing to the maximum number of mature individuals, girth and height. In spite of good adult population, low number of seedlings and saplings of the species across the native terrain indicates its poor germination and recruitment warranting both in situ and ex situ conservation measures.

Seed storage and germination studies of Garcinia talbotii Raizada ex Santapau seeds - an endemic tree from Western Ghats of India

2016 ◽  
Vol 23 (2) ◽  
pp. 73-78
Author(s):  
T. Sabu ◽  
P.S. Shameer ◽  
Chitra Rajeswary ◽  
N. Mohanan ◽  
C. Anilkumar
Keyword(s):  
Ex Situ Conservation ◽  
Storage Temperature ◽  
Seed Viability ◽  
Seed Storage ◽  
Ex Situ ◽  
Hermetic Storage ◽  
Western Ghats Of India ◽  
Relationship Of ◽  
The Relationship ◽  
And Storage

Seeds of Garcinia talbotii remained viable hardly for two weeks in open room conditions. As part of ex-situ conservation of Garcinia talbotii, seeds longevity was studied since seeds are the main propagule. For this, the relationship of seed viability with respect to different moisture content and storage temperature were analyzed. Seed storage behaviour is also investigated. Being recalcitrant, seeds are desiccation sensitive as well as chilling sensitive. During hermetic storage of seeds at 300C /70 % RH seeds retained viability about 6 months.

scholarly journals Seed germination in Cerrado species

2008 ◽  
Vol 20 (3) ◽  
pp. 167-181 ◽  
Author(s):  
Lilian B. P. Zaidan ◽  
Rosana C. Carreira
Keyword(s):  
Seed Germination ◽  
Sulphuric Acid ◽  
Tree Species ◽  
Light Sensitivity ◽  
Dormancy Breaking ◽  
Shrub Species ◽  
Different Temperatures ◽  
Light Effects ◽  
And Storage ◽  
Herb Species

The aim of this review is to comment on the available data about germination of seeds from herb, shrub and tree species of the Cerrado after the publication of the review written by Felippe and Silva in 1984. Studies on seed germination of herbaceous species focused mainly on the responses of seeds to light, different ranges of temperature and storage in the soil. The majority of seeds from herb species germinate between 20°C and 30°C, and are photoblastic. Alternate temperatures favored germination in some seeds, but changed light sensitivity of the achenes of Bidens gardneri. Seeds of most of the shrub species of Melastomataceae are positive photoblastic; among the Velloziaceae, germination in the dark was observed in some species. Other shrub species show dormancy caused by impermeability of the seed tegument, as described for seeds of some species of Bauhinia. Their dormancy is broken by chemical scarification using sulphuric acid. Seeds of Heteropterys pteropetala are sensitive to very high temperatures, similar to those registered during burnings. Some species were considered to have allelopathic effects and could inhibit the germination of seeds of other species and the establishment of plantlets. Seeds of most tree species do not require light to germinate and the focus of the studies were on methods of dormancy breaking. Sulphuric acid and incisions in the tegument proved to be the most efficient methods to break dormancy. In general, the studies are limited to three major aspects: responses to light, effects of different temperatures and dormancy breaking. More studies are necessary to understand the physiological and biochemical aspects of reserve compounds and their mobilization during germination, as well as the effects of fire in these seeds.

scholarly journals PRESENT STATUS AND EX-SITU CONSERVATION OF MORINGA CONCANENSIS IN INDIAN DESERT

2020 ◽  
Vol 11 (2) ◽  
Author(s):  
C.S. Purohit ◽  
R. N. Kulloli ◽  
Suresh Kumar
Keyword(s):  
Seed Germination ◽  
Present Status ◽  
Ex Situ Conservation ◽  
Ex Situ ◽  
Desert Plant ◽  
Seedling Mortality ◽  
Indian Desert ◽  
Plant Parts

Moringa concanensis Nimmo. ex Dalz. & Gibs. is rare economic important plant distributed in Indian desert. Plant parts are used for different medicinal purposes. Present study was conducted to assess its status in nature as well as different seed germination treatment for its ex-situ conservation. Study revealed that germination was 100% in coco-peat media while, it was 97.56% in polythene bags. Seedling mortality was more (39.46%) in coco-peat media. After transplantation seedlings showed 82% survival in field.

scholarly journals Seed germination of Carex lainzii Luceño, E. Rico & T. Romero: An endemic Spanish endangered species

2019 ◽  
Vol 20 (3) ◽  
pp. 704-711
Author(s):  
KAROLINE APARECIDA FELIX RIBEIRO ◽  
CRISTIAN MADEIRA DE MEDEIROS ◽  
JOSÉ ÁNGEL SÁNCHEZ-AGUDO ◽  
JOSÉ SÁNCHEZ-SÁNCHEZ
Keyword(s):  
Seed Germination ◽  
Endangered Species ◽  
Ex Situ Conservation ◽  
Seed Viability ◽  
Potassium Nitrate ◽  
Ex Situ ◽  
Cold Stratification ◽  
Different Temperatures ◽  
Two Populations

Abstract. Ribeiro KAF, Madeira de Medeiros C, Agudo JAS, Sánchez JS. 2019. Seed germination of Carex lainzii Luceño, E. Rico & T. Romero: An endemic Spanish endangered species. Biodiversitas 20: xxxx. Strategies to halt the decline of biodiversity include: in-situ and ex-situ conservation, the latter already considered at the global level essential in conservation programs. The results of the germinative responses of Carex lainzii Luceño, E. Rico & T. Romero (Cyperaceae), an endemic Spanish endangered species, are presented in this work, to different trials carried out in the laboratory with seeds harvested in the two known populations of that community. Treatments with and without 0.2% potassium nitrate (KNO3) were tested for four, six and eight months in cold stratification at 5 °C in two germination chambers at different temperatures (22/10 °C and 27/15 °C with a photoperiod of 12/12 hours). The results indicate that there is a large difference in germination rates between the two populations. The use of KNO3 did not increase germination rates in any case, but differences were found between periods of cold stratification, with six months being the most effective. On the other hand, the germination rates of both populations remain low (17.58% and 2%) compared to the obtained rate of seed viability. With this first approach to the understanding of the germination requirements of C. lainzii, it becomes clear that new essays are needed to obtain better results, in order to effectively implement the protection plans of C. lainzii populations.

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