scholarly journals Germination temperatures and treatments to overcome dormancy in Belamcanda chinensis seeds1

2017 ◽  
Vol 47 (4) ◽  
pp. 377-383
Author(s):  
Girlânio Holanda da Silva ◽  
Lenise Santos Baldini ◽  
Camila Aquino Tomaz ◽  
Rubiana Falopa Rossi ◽  
João Nakagawa
Keyword(s):  
Seed Dormancy ◽  
Ornamental Plant ◽  
Medicinal Herb ◽  
Optimal Conditions ◽  
Germination Process ◽  
Belamcanda Chinensis ◽  
China And Japan

ABSTRACT Belamcanda chinensis is an ornamental plant cultivated as a medicinal herb in its countries of origin: China and Japan. It is propagated by rhizomes and seeds, but little is known on the optimal conditions for its germination. This study aimed to assess germination temperatures and treatments to overcome its seed dormancy. Two experiments were conducted: the first evaluated the effects of constant temperatures of 20 ºC, 25 ºC and 30 ºC (in the dark) and 20-30 ºC with light (8-h photoperiod), while the second one involved the removal of combinations from the seed tegument structure (with and without tegument), with pre-hydration at 7 ºC, 30 ºC or no pre-hydration, in addition to an extra treatment without tegument or pre-hydration. Alternating the temperature results in better effects on the variables evaluated, while, at constant temperatures, there is little or no germination. The removal of the outer tegument structure and from seeds pre-hydrated at 30 ºC accelerates the germination process.

scholarly journals ARATICUM ACCESSIONS: EFFECT OF GIBBERELLIC ACID CONCENTRATIONS AND SOAKING TIMES ON SEED DORMANCY OVERCOMING1

2021 ◽  
Vol 34 (3) ◽  
pp. 614-620
Author(s):  
EDVAN COSTA DA SILVA ◽  
FABÍOLA VILLA ◽  
DANIEL FERNANDES DA SILVA ◽  
JEAN CARLO POSSENTI ◽  
LUCIANA SABINI DA SILVA ◽  
...  
Keyword(s):  
Experimental Design ◽  
Gibberellic Acid ◽  
Seed Dormancy ◽  
Physiological Process ◽  
Superior Performance ◽  
High Concentration ◽  
Physiological Aspect ◽  
Germination Process

ABSTRACT The germination process of the Annona sylvatica A.St.-Hil becomes difficult because the seeds have physical and physiological numbness. Although, the objective was to evaluate the effect the gibberellic acid can have in overcoming this physiological process. So that, aimed to evaluate the effect of the gibberellic acid in the overcoming dormancy of araticum seeds. Two different projects were developed simultaneously (plants germination in the laboratory and emergence of seedlings in seed). At the laboratory, the experimental design used was completely casualized in factorial scheme 4 x 4. Evaluating the physiological aspect of the germination and vigor. The germination of the seeds presented superior performance when they were immersed in 1200 mg.L-1 of GA3, in 24 h of imbibition, reaching 67% of germination. In the emergence of seedlings in seed, the experimental design used was to randomize blocks in factorial scheme 4 x 5 (four accesses x five periods of immersion). After 110 days, evaluating physiological aspects of emergence and vigor. The emergence varied between 32 to 45% (accesses A1 and A3) in a period of 15 to 24 h (accesses A1 and A3 or A4). High concentration and longer period of soaking in gibberellic acid promote a bigger germination of the araticum seeds. There is a difference between the accesses of the species, necessary to evaluate before being collected, and in the present study the accesses A3 is promising for harvest.

Overcoming Dormancy and Influence of Light on the Physiological Quality of Senna cana (Fabaceae) Seeds

2019 ◽  
pp. 1-9
Author(s):  
Jordânia X. Medeiros ◽  
Ana L. P. Feliciano ◽  
Valderez P. Matos ◽  
Girlânio H. Silva ◽  
Yana S. Lopes ◽  
...  
Keyword(s):  
Seed Germination ◽  
Seed Dormancy ◽  
Native Species ◽  
Red Light ◽  
Distilled Water ◽  
Light Regimes ◽  
Germination Process ◽  
Physiological Quality ◽  
Mean Germination Time

Environmental factors affect the germination process, like the presence of seed coat and the quality of light; these informations are still scarce for many native species from Brazil, especially for Senna cana, which there are no adequate standards and methodologies to be used in germination tests. The aim of this research was to recommend adequate pre-germinative treatment(s) to overcome seed dormancy, and determine the degree of influence of different light regimes in seed germination of S. cana. Two experiments were carried out: T1-evaluation of different methods of dormancy overcoming (intact seeds (control), T2-imbibition of the intact seeds for 24 hours (in distilled water), T3-scarified seeds with sandpaper n° 100 in the hilum opposite region, T4-scarified seeds with sandpaper n° 100 in the region the hilo opposite region and imbibition in water (in distilled water) for 24 hours; T5-imbibition in water at 80°C); 2-Influence of light quality on seed germination and vigor (white light, red light, far red light and absence of light). The evaluated parameters were: first germination count, percentage of germination, IVG (Germination speed index), MGT (Mean germination time). Treatments were compared by Tukey at 5% probability. The best method for overcoming seed dormancy was mechanical scarification with sandpaper nº 100. The germination of the seeds of S. cana can be classified as indifferent to the luminosity, despite germinative response be greater under white and red light.

scholarly journals The complete chloroplast genome of Chinese medicinal herb Belamcanda chinensis (L.) Redouté (Iridaceae)

2021 ◽  
Vol 6 (2) ◽  
pp. 331-332
Author(s):  
Cuicui Li ◽  
Saiwen Hu ◽  
Yining Ding ◽  
Guangyao Bi ◽  
Chun Su ◽  
...  
Keyword(s):  
Chloroplast Genome ◽  
Medicinal Herb ◽  
Chinese Medicinal Herb ◽  
Complete Chloroplast Genome ◽  
Belamcanda Chinensis

scholarly journals Comparative metabolites profiling of Polygonatum cyrtonema Hua seed during sand storage and germination

2020 ◽  
Author(s):  
Qing Jin ◽  
Jinfeng Tong ◽  
Wenwu Zhang ◽  
Long Xia ◽  
Xiaoyun Zhu ◽  
...  
Keyword(s):  
Seed Germination ◽  
Seed Dormancy ◽  
Seed Coat ◽  
Metabolic Pathways ◽  
Vital Role ◽  
Metabolic Pathway Analysis ◽  
Germination Process ◽  
Breaking Seed Dormancy ◽  
Metabolic Activities ◽  
Storage Times

Abstract Background: The seeds of Polygonatum cyrtonema Hua have dormancy phenomenon. Previous studies have shown that sand storage factors effects of the seed dormancy of P. cyrtonema Hua seeds and enhance the seed germination process. Subsequently, metabolic activities and different changes during the sand storage and germination process of P. cyrtonema Hua seed has not been heavily researched.Results: In this study the changes in the metabolites of P. cyrtonema Hua seeds at different sand storage times and germination stages, we used untargeted metabolomics to determine them. Most of the sugar and glycoside contents in seed coat increased after 30 d on the other hand, in peeled seeds increased at 30 d and decreased at 60 d after sand storage treatment. The content of proline and benzoic acid decreased in the seed coat after sand storage. PCA, OPLS-DA and HCA showed that the contents of most metabolites increased after 7 d and decreased after 14 d of seed germination. The process of 7 d to 14 d was the key stage of seed germination of P. cyrtonema Hua. Differential metabolic pathway analysis showed that seed germination was controlled by multiple metabolic pathways. Metabolic correlation revealed the interdependence between seed germination metabolites and metabolic pathways. Conclusion: Sand storage can significantly increase the rate of seed germination and play a vital role in seed dormancy of P. cyrtonema Hua. There was inherent differences in metabolites during different storage time and germination stages in P. cyrtonema Hua. Our work provides a first glimpse of the metabolome in seed germination of P. cyrtonema Hua, and provides a valuable informations for revealing the mechanism of breaking seed dormancy.

scholarly journals Pre-germination Treatments, Quality of Light and Temperature on Syagrus coronata (Mart.) Becc. Seeds Germination

2018 ◽  
Vol 10 (5) ◽  
pp. 268
Author(s):  
Jorge M. P. Porto ◽  
Viviane L. Oliveira ◽  
Michele L. Souza ◽  
Rafaeli A. V. Souza ◽  
Adriana Soares ◽  
...  
Keyword(s):  
Seed Dormancy ◽  
Negative Impact ◽  
Complete Removal ◽  
Dormancy Breaking ◽  
Physical Dormancy ◽  
Indolebutyric Acid ◽  
Palm Trees ◽  
Germination Process ◽  
Different Temperatures ◽  
Process Solutions

Studies show that most species of palm trees present seed dormancy. This characteristic hinders the production of seedlings, due to the long period for germination and the unevenness of the seedlings. The specie Syagrus coronata, despite being widely used as food and economic resources, presents also seed dormancy, which hinders its propagation. Thus, this work aimed at evaluating the germination of S. coronata seeds using different methods of dormancy breaking and also, under different qualities of light and temperature. To do so, the seed endocarps were scarified by friction, puncture and complete removal of the endocarp, and the pre-soaking of seeds at different concentrations (50, 100, 200 and 400 mg L-1) of gibberellic acid (GA3) and indolebutyric acid (IBA). We also evaluated the effect of germination in seeds exposed to different conditions of light (white, red, far red, blue and dark) and to different temperatures (25, 30, 35 and 20-30 °C). The data show that the act of rubbing the endocarp optimizes the seed germination process. Solutions containing growth regulators in the pre-soaking of seeds have a negative impact on germination. And the absence of light and the constant temperature of 25 °C are the most suitable for germination. The results indicate that S. coronata seeds have physical dormancy, and, despite obtaining greater germination in the dark, they are neutral photoblastic.

scholarly journals Morfología de semilla, germinación y desarrollo postemergente de tres especies del género Polianthes L. (Agavaceae)

2017 ◽  
pp. 55
Author(s):  
Héctor Serrano-Casas ◽  
Eloy Solano-Camacho ◽  
Adelaida Ocampo-López
Keyword(s):  
Seed Germination ◽  
Seed Dormancy ◽  
Seed Viability ◽  
Germination Percentage ◽  
Seed Morphology ◽  
Seedling Development ◽  
The Other ◽  
Viability Test ◽  
Other Hand ◽  
Germination Process

The seed germination process and seedling development were studied for Polianthes geminiflorn (Lex.) Rose var. geminiflom, Polianthes sp . and P. longiflom Rose. The seed viability test estimated was from 94 to 100%. In seeds treatment by soaking the seeds in water at 25ºC during three, six and twelve hours, the germination percentage, velocity and germination uniformity were increased like control assay. On the other hand, P geminiflorn var. geminiflora. were more resistent than Polianthes sp. and P.  longiflora. seeds to a treatment of three, six and twelve hours in water a t 40ºC. The three species had epigeal germination and their cotyledon developed a haustorium. None of this species exhibited seed dormancy and they were orthodox. There were significant differences in the first leave length between the three species. The seed morphology, germination behavior and seedlings development were very similar.

scholarly journals Evaluation of Harvesting and Seed Dormancy Overcoming Techniques in Hymenaea courbaril Germination

2020 ◽  
Vol 9 ◽  
pp. 18-29
Author(s):  
Leonardo Regnier
Keyword(s):  
Production Process ◽  
Seed Dormancy ◽  
Native Species ◽  
Seedling Production ◽  
Processing Methods ◽  
Hymenaea Courbaril ◽  
Harvest Technique ◽  
Germination Process ◽  
Production Techniques ◽  
Early Harvest

Hymenaea courbaril is an endangered Brazilian native species. Recently, this species has been used on reforestation programs. So, production techniques that propitiate faster germination are very important. Although, seed dormancy, which could hamper the seedling production process, is not extensively recognized. Thus, this study focused on evaluating the influence of early harvest technique, scarification and pre-imbibition techniques to overcome H. courbaril seed dormancy in two steps. First, evaluating green fruits harvest could influence the germination process, 137 visually healthy seeds from green fruits and 400 seeds from mature fruits were selected. Seeds from green fruits presented similar results to seeds from mature fruits. Probably due to the natural seed tegument rupture. After, the influence of mechanical scarification, pre-imbibition and the combination of both methods were measured. All studied processing methods did not affect significantly any of the germination measurement parameters. Mechanical scarification exhibits similar responses as previous studies showed when using acid scarification. The technique of harvesting green fruits from the treetop seems to be applicable to commercial seedling production. While none of the studied treatments promoted significantly benefits to germination at any of the indexes.

scholarly journals Germinação de sementes armazenadas de Belamcanda chinensis (L.) DC

2018 ◽  
Vol 24 (2) ◽  
pp. 149-154
Author(s):  
Girlânio Holanda Silva ◽  
Lenise Santos Baldini ◽  
Camila Aquino Tomaz ◽  
Rubiana Falopa Rossi ◽  
João Nakagawa
Keyword(s):  
Relative Humidity ◽  
Medicinal Plant ◽  
Moisture Content ◽  
Temperature Control ◽  
Seed Weight ◽  
Primary Root ◽  
Belamcanda Chinensis ◽  
China And Japan ◽  
One Year ◽  
100 Seed Weight

The leopard lily (Belamcanda chinensis) is an exotic ornamental Iridaceae in Brazil and cultivated as a medicinal plant in its countries of origin (China and Japan). It is propagated by rhizomes and seeds; however, the viability of these seeds after storage remains unknown. The aim of this study was to evaluate the germinability of stored B. chinensis seeds. Seeds harvested between March and April 2010, 2011, 2012 and 2013 were separated by year and stored in paper bags in a room without relative humidity and temperature control. Seeds from these four years were analyzed for moisture content, 100-seed weight and germination index. The freshly harvested seeds (2013) and those stored for one year (2012) exhibited 72% and 41% germination, respectively, and 80% and 47% primary root emission at the end of 20 weeks. However, seeds stored for two and three years (2010 and 2011) didnot germinate. B. chinensis seeds remained viable for up to one year of storage.

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