scholarly journals Water immersion and one-year storage influence seed germination of Copernicia alba palm tree from a neotropical wetland

2021 ◽  
Author(s):  
Vanessa Couto Soares ◽  
L. Felipe Daibes ◽  
Geraldo A. Damasceno-Junior ◽  
Liana Baptista De Lima
Keyword(s):  
Seed Germination ◽  
Room Temperature ◽  
Ex Situ Conservation ◽  
Water Immersion ◽  
Hot Water ◽  
Ex Situ ◽  
Palm Tree ◽  
Laboratory Conditions ◽  
One Year ◽  
Water Treatments

Abstract Copernicia alba (Morong ex Morong & Britton) is a palm tree native to tropical and subtropical climates, commonly named “carandá”, that often forms monodominant populations in the Pantanal wetland in Brazil. Currently, the knowledge of the seed germination behavior of C. alba is still limited, as well as seed viability in ex-situ conservation under laboratory conditions. Hence, this study investigated the effect of water treatments and a one-year storage period (at 19°C under a relative humidity of 45%) on its germination. We subjected fresh and stored seeds to immersion in water at room temperature (~25°C) for 24, 48, and 72 h; and hot water (~75°C) for 5 min and 10 min. The results showed that seeds do not have primary dormancy, with fresh seeds germinating 84% in the control. Additionally, fresh seeds had a significant increase in germination percentage (reaching 100%) and faster germination times after immersion in water for 48 and 72 h. On the other hand, hot water treatments decreased germination for both fresh and stored seeds. One year of storage reduced the germination capacity by almost 50%. We concluded that seeds of C. alba may be easily germinated under laboratory conditions for seedling production, and water immersion at room temperature can improve the germination of fresh seeds. However, long-term seed storage and hot-water treatments may jeopardize germination. Future studies should further investigate ex-situ conservation of seed of C. alba under extended periods, considering seed desiccation and alternative storage conditions, to improve seed conservation techniques .

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.

Ex situ conservation of Aconitum heterophyllum Wall.—an endangered medicinal plant of the Himalaya through mass propagation and its effect on growth and alkaloid content

2005 ◽  
Vol 3 (2) ◽  
pp. 127-135 ◽  
Author(s):  
Subedar Pandey ◽  
Rekha Kushwaha ◽  
Om Prakash ◽  
Amita Bhattacharya ◽  
P.S. Ahuja
Keyword(s):  
Ex Situ Conservation ◽  
Natural Habitat ◽  
Hot Water ◽  
Alkaloid Content ◽  
Ex Situ ◽  
Endangered Medicinal Plant ◽  
Aconitum Heterophyllum ◽  
Total Alkaloid Content ◽  
The Himalaya

The endangered alpine plant Aconitum heterophyllum was conserved under ex situ conditions (greenhouse and open) of Palampur by overcoming seed dormancy and plant establishment through hot water treatment (40–60 °C for 30–120 s) of seeds. High seed germination (88 and 76%) was obtained when seeds were treated with hot water at 45 and 50 °C for 90 s. Correlation studies also revealed that treatment enhanced vegetative growth and reproductive yield of the plants. The total alkaloid content of the roots and rhizomes of the plants growing under ex situ conditions was lower than the ones collected from the natural habitat in the 1-year-old plants. However, in the 2-year-old plants, it was almost at par with the ones collected from nature. The life cycle of the plants growing under ex situ conditions also did not vary largely from the plants growing under in situ conditions. Therefore, the present study indicates the successful adaptation of A. heterophyllum plants in conditions other than their natural habitat and hence its potential for sustainable commercialization.

scholarly journals Seed longevity, viability and germination of four weed-ruderal Asteraceae species of ethnobotanic value

2021 ◽  
Vol 99 (2) ◽  
pp. 279-290
Author(s):  
Andrea Mariel Jiménez-Vázquez ◽  
Alejandro Flores-Palacios ◽  
Alejandro Flores-Morales ◽  
Irene Perea-Arango ◽  
María del Carmen Gutiérrez ◽  
...  
Keyword(s):  
Room Temperature ◽  
Storage Temperature ◽  
Seed Viability ◽  
Biological Properties ◽  
Seed Longevity ◽  
Ex Situ ◽  
Cold Temperatures ◽  
Design Production ◽  
One Year ◽  
Germination Experiments

Background: A high proportion of Asteraceae species are considered weeds, some of them have recognizable biological properties. To design production protocols and ex situ seed conservation programs is necessary to determine the effect of storage temperature on seed viability and longevity. It is known that cold temperatures maintain seed viability and thus prolong seed longevity. Hypotheses: The seeds of Aldama dentata, Verbesina virgata, Stevia origanoides and Roldana barba-johannis stored at low temperature (5 ºC) will have greater longevity than when stored at room temperature (16.45 ± 1.94 oC) and will decrease their viability as they age. Study site and dates: Seeds of the four Asteraceae were collected (November-December 2015) in The National Park “El Tepozteco”, Morelos, Mexico and in the “Chamilpa” campus of the Universidad Autónoma del Estado de Morelos. Methods: The monthly germination experiments (11) were implemented with seeds stored under both temperatures, germination (%) and mean germination time were registered to estimate seed longevity. The seed viability stored at room temperature was evaluated with the tetrazolium test. Results: Germination and viability decreased with seed age. Along the experiment, seed germination was similar at both storage temperatures. A. dentata and S. origanoides showed the highest germination but A. dentata alone reached the major seed viability. The oldest seeds germinated faster. Conclusions: Seed longevity of all the species exceeded one year. For propagation purposes, it is recommended to use seeds between 8 and 9 months of age, when their germination and viability are the highest.

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 Effect of hot water dip treatment on seedborne pathogens and germination of carrot seeds

2009 ◽  
Vol 62 ◽  
pp. 404-404
Author(s):  
L-H. Cheah ◽  
A.T. Marsh ◽  
D.I. Hedderley
Keyword(s):  
Water Treatment ◽  
Seed Germination ◽  
Potato Dextrose Agar ◽  
Hot Water ◽  
Hot Water Treatment ◽  
Fusarium Spp ◽  
Seedborne Pathogens ◽  
Hot Water Dip ◽  
Water Treatments

The effect of hot water treatment of carrot seeds on seedborne pathogens (Alternaria and Fusarium spp) and seed germination was studied Carrot seeds (no fungicide) were dipped in water at 50C or 52C for 10 20 or 30 min and plated on potato dextrose agar to assess pathogen growth Treated seeds were sown in cell trays to assess germination in a glasshouse The weight of the germinated seedlings was also recorded All hot water treatments significantly (P

scholarly journals Ripening Behavior and Quality of `Brazilian' Bananas following Hot Water Immersion to Disinfest Surface Insects

HortScience ◽  
2004 ◽  
Vol 39 (6) ◽  
pp. 1349-1353 ◽  
Author(s):  
Marisa M. Wall
Keyword(s):  
Exposure Time ◽  
Water Immersion ◽  
Titratable Acidity ◽  
Hot Water ◽  
Soluble Solids ◽  
Banana Fruit ◽  
Control Fruit ◽  
Solids Content ◽  
Water Treatments ◽  
Hot Water Immersion

The fruit quality and ripening response of `Brazilian' bananas (Musa sp., group AAB) were determined following hot water immersion treatments for surface disinfestation. Summer-harvested fruit were exposed to 47, 49, or 51 °C water for 10, 15 and 20 minutes and ripened at 20 °C. The summer experiment established the exposure time and temperature limits for fruit injury. Winter-harvested fruit were immersed in 48, 49, or 50 °C water for 5, 10 and 15 minutes, stored for 12 d at 14 °C, and ripened at 22 °C. The hot water exposure time had a greater effect than the water temperature on banana fruit ripening. Nontreated bananas ripened after 13 to 15 d, and ripening was delayed by 2 to 7 d when fruit were exposed for 15 or 20 minutes to hot water. Hot water treatments did not inhibit pulp softening, but peels tended to be firmer for bananas immersed in 49 to 51 °C water than control fruit. Heat-treated bananas were not different from control fruit in soluble solids content or titratable acidity, however the conversion of starch to sugars was reduced at higher temperatures and exposure times. Bananas exposed for 20 minutes to hot water had delayed respiratory peaks and ethylene production, especially at 51 °C. Mild peel injury was observed on fruit exposed to higher temperatures (49 to 51 °C) for longer durations (15 or 20 minutes).

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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