scholarly journals The pattern of germination of teak mistletoe seeds in relation with parasitism

2021 ◽  
Vol 918 (1) ◽  
pp. 012034
Author(s):  
Z Muttaqin ◽  
W B Sri ◽  
W Basuki ◽  
I Z Siregar ◽  
Corryanti
Keyword(s):  
Life Cycle ◽  
Seed Germination ◽  
Germination Percentage ◽  
Standing Tree ◽  
Research Results ◽  
Germination Process ◽  
Tree Stem ◽  
Bird Feces

Abstract The objectives of this research are to test the initial viability and germination pattern of teak mistletoe seeds, namely Dendrophthoe pentandra and Macrosolen tetragonus in associated with parasitism. Research results showed that the pattern of D. pentandra germination was different from that of M. tetragonus. The germination process of D. pentandra showed incomplete development of germination morphology, marked by an absence of development or growth of hypocotyl and cotyledon. Parasitism was more dominant in D. pentandra, supported by the fact that the sum of mean germination day (RH) in the stem of teak seedling was faster (17.54±2.77 days), as compared with that of M. tetragonus (35.13±1.76 days), although mortality of M. tetragonus seedlings was very low (±3%), whereas that of D. pentandra was fairly high (±34%). It was related to the life cycle of M. tetragonus, which was longer than that of D. pentandra. In the attachment of seeds in the standing tree stems, it was proven that the germination percentage (%K) of D. pentandra (38.5%) was higher than that of M. tetragonus (11.1%). Seed germination of D. pentandra from bird feces also showed that %K (46.4%) was higher than seed attachment in tree stem, including M. tetragonus. It was supposed that there was a correlation between the easiness of germination and parasitism character in teak mistletoes. It was considered that parasitism of D. pentandra was more prominent than that of M. tetragonus in a teak host.

scholarly journals From the Outside to the Inside: New Insights on the Main Factors that Guide the Germination Process

2020 ◽  
Author(s):  
Chiara Longo ◽  
Soyanni Holness ◽  
Veronica De Angelis ◽  
Andrea Lepri ◽  
Sara Occhigrossi ◽  
...  
Keyword(s):  
Life Cycle ◽  
Seed Germination ◽  
Seedling Growth ◽  
Fine Tuning ◽  
Control Network ◽  
Control Seed ◽  
Germination Process ◽  
Main Factors ◽  
External Signals ◽  
Developmental Switch

The transition from a dormant to a germinating seed represents a crucial developmental switch in the life cycle of a plant. Subsequent transition from a germinating seed to an autotrophic organism also requires a robust and multi-layered control. Seed germination and seedling growth are multistep processes, involving both internal and external signals, which lead to a fine-tuning control network.

scholarly journals Vanadium stimulates growth and flower production in tomato without affecting seed germination

2021 ◽  
Vol 49 (4) ◽  
pp. 12400
Author(s):  
Atonaltzin GARCÍA-JIMÉNEZ ◽  
Libia I. TREJO-TÉLLEZ ◽  
María G. PERALTA SÁNCHEZ ◽  
Adriana CONTRERAS-OLIVA ◽  
Fernando C. GÓMEZ-MERINO
Keyword(s):  
Seed Germination ◽  
Germination Percentage ◽  
Beneficial Element ◽  
Horticultural Crops ◽  
Solanum Lycopersicum L ◽  
Germination Process ◽  
Dry Biomass ◽  
Cultivated Species ◽  
Number Of Leaves ◽  
Treatment Application

Vanadium (V) is easily absorbed by plants and has been proposed as a novel beneficial element and inorganic biostimulant, since at low doses it can enhance plant metabolism. However, its effects on the biology of cultivated species have not been fully explored. Therefore, we evaluated the effect of V on tomato (Solanum lycopersicum L.) during seed germination and initial seedling growth. We tested 0, 5, 10, and 15 µM V in seeds during the germination process and in 37-day-old plants over four weeks. The application of V did not alter seed germination percentage. Plant height increased with the application of 5 µM V at 21 days after treatment application (DAT), while root volume increased with the application of 10 µM V at 28 DAT. Stem diameter, number of leaves, and number of flower buds showed the highest values with 10 µM V, while 5 µM V produced higher means in number of leaves as well as fresh and dry biomass weight of flowers. However, the fresh and dry biomass of leaves, stems, and roots decreased significantly with the application of 15 µM V. The total concentrations of amino acids and sugars in leaves, stems, and roots decreased in the treatments with V. We conclude that V is a beneficial element with high potential to be used in the biostimulation of horticultural crops such as tomato.

scholarly journals Optimal temperature for germination and seedling development of cowpea seeds

2020 ◽  
Vol 14 (2) ◽  
Author(s):  
Juliane Rafaele Alves Barros ◽  
Francislene Angelotti ◽  
Jéssica De Oliveira Santos ◽  
Rodrigo Moura e Silva ◽  
Barbara França Dantas ◽  
...  
Keyword(s):  
Seed Germination ◽  
Germination Percentage ◽  
Seedling Development ◽  
Optimal Temperature ◽  
Cowpea Cultivars ◽  
Cowpea Seeds ◽  
Germination Process ◽  
Germination Speed ◽  
Increasing Temperature ◽  
Climatic Elements

Temperature is one of the climatic elements that affect most the germination process and seedling development. Thus, the objective of this study was to evaluate the germination and seedling development of cowpea cultivars under increasing temperature. The seeds of the cultivars Acauã, Carijó, Guariba, Gurguéia, Itaim, Juruá, Pajeú, Potengi, Pujante, Rouxinol, Tapahium, and Tumucumaque were kept in germination chamber at temperatures of 20, 25, 30, 35 and 40°C, with photoperiod of 12 h. Cowpea seeds have optimal germination performance and seedling development at temperatures in the range of 30.49 - 35.48°C. The cultivars presented germination percentage above 91% under 40°C, however, the seedling were abnormal. The temperature of 20°C provided germination above 96%, but with a longer period to germinate. The temperature range between 30 - 35°C favored the germination speed index, average time, and seed germination speed, with optimum temperatures varying between the cultivars. The highest rate of normal seedlings was observed at temperatures between 25 and 35°C.

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 Mobilization of reserves and germination of seeds of Erythrina velutina Willd. (Leguminosae - Papilionoideae) under different osmotic potentials

2012 ◽  
Vol 34 (4) ◽  
pp. 580-588 ◽  
Author(s):  
Renata Conduru Ribeiro Reis ◽  
Bárbara França Dantas ◽  
Claudinéia Regina Pelacani
Keyword(s):  
Water Stress ◽  
Seed Germination ◽  
Osmotic Potential ◽  
Soluble Sugars ◽  
Germination Percentage ◽  
Uniformity Coefficient ◽  
Carbon And Nitrogen ◽  
Germination Process ◽  
Mean Time ◽  
Osmotic Potentials

Some environmental factors, including water availability, may influence seed germination. This study investigated the germination of E. velutina seeds submitted to different osmotic potentials and mobilization of reserves during water-stress. Scarified seeds were arranged in paper rolls and soaked in solutions of Polyethylene Glycol (PEG) prepared in osmotic potentials 0.0, -0.2, -0.4, -0.6, and -0.8 MPa and kept into a seed germinator, at 25 °C, and 12/12 h photoperiod (L/D), during 10 days. The percentage, mean time, mean speed, germination speed index; as well as the germination uniformity coefficient were assessed. During germination process the total soluble sugars, reducing sugars, soluble protein, and total amino acids were quantified in the cotyledon, hypocotyl and radicle of soaked seeds and cotyledons of quiescent seeds (control). There was influence of osmotic potential on E. velutina seed germination. The germination percentage remained at high levels until -0.6 MPa and above this osmotic potential there has been no germination. The mobilization of stored reserves of carbon and nitrogen in E. velutina seeds was also influenced by water-stress. There was sensitiveness between -0.2 and -0.6 MPa; however, the degradation and the mobilization of reserves was slower when the osmotic potential decreased.

scholarly journals Seed Germination and Initial Growth of Quinoa Seedlings Under Water and Salt Stress

2019 ◽  
Vol 11 (15) ◽  
pp. 153 ◽  
Author(s):  
Geovana Facco Barbieri ◽  
Raquel Stefanello ◽  
Janine Farias Menegaes ◽  
Janete Denardi Munareto ◽  
Ubirajara Russi Nunes
Keyword(s):  
Seed Germination ◽  
Osmotic Potential ◽  
Chenopodium Quinoa ◽  
Dry Mass ◽  
Germination Percentage ◽  
Initial Growth ◽  
Peg 6000 ◽  
Germination Process ◽  
Seedling Length ◽  
Osmotic Potentials

Excessive amounts of salts and soil water deficiency interfere on seed germination and the full development of several crops. The objective of this research was to evaluate the effect of water stress and salinity on the germination process and initial growth of quinoa (Chenopodium quinoa Willd.) seedlings. In the first experiment, two quinoa seed lots with different physiological conditions were distributed on paper soaked in aqueous solution containing polyethylene glycol PEG-6000 in osmotic potentials corresponding to 0.0; -0.1; -0.2; -0.3 and -0.4 MPa and held at 20 °C under 8 hours of light exposition. In the second experiment, solutions of sodium chloride (NaCl), potassium chloride (KCl), calcium chloride (CaCl2) and magnesium chloride (MgCl2) were used to simulate the effect of salinity using the osmotic potentials, temperature and light conditions previously described. Assessed parameters were the germination percentage, first count, length and dry mass of seedlings. There was a reduction in quinoa germination percentage, first seed count and seedling length as the osmotic potential decreased in CaCl2, NaCl, KCl, MgCl2 and PEG-6000 solutions. The quinoa seeds exhibited higher tolerance to NaCl and KCl salts in the germination process and initial seedling growth. The progressive reduction of the osmotic potential induced by salts NaCl, KCl, CaCl2, MgCl2 and PEG-6000 negatively affects seed germination and initial growth of quinoa seedlings.

scholarly journals Solanum betaceum in vitro seed germination and seedling development in response to pregerminative treatments

Bionatura ◽  
2021 ◽  
Vol 6 (1) ◽  
pp. 1520-1523
Author(s):  
K. S Salazar-Vega ◽  
I. Vaca,
Keyword(s):  
Life Cycle ◽  
Seed Germination ◽  
Woody Plants ◽  
Seedling Emergence ◽  
Germination Percentage ◽  
Seedling Development ◽  
Emergence Time ◽  
Germinated Seeds ◽  
Solanum Betaceum

Germination and seedling development are critical stages in the life cycle of plants. Insufficient seedling emergence and inadequate establishment of woody plants are significant constraints in producing crops such as tamarillo. The application of pregerminative protocols improves the germination percentage, reduces the seedling emergence time, and improves several species in vitro. The present study was conducted to contrast three pregerminative treatments on Solanum betaceum seeds. When evaluating the pregerminative treatments, treatment T3 (imbibition for 24 hours) obtained the best results, showing an average of 21.62 days to germination, 73% germinated seeds, and 2.31 leaves per explant.

scholarly journals ¿Does ingestion by birds affect Pyracantha atalantoides (Rosaceae) seed germination?

2015 ◽  
Vol 7 (2) ◽  
pp. 295-299
Author(s):  
Claudia Marisel Dellafiore ◽  
María José Rosa ◽  
Verónica Scilingo
Keyword(s):  
Seed Germination ◽  
Digestive Tract ◽  
Seed Treatment ◽  
Germination Rate ◽  
Germination Percentage ◽  
Start Speed ◽  
Parent Plant ◽  
Natural Ecosystems ◽  
Pass Through ◽  
Bird Feces

Birds play a fundamental role in many ecosystems because they spread a variety of fruits and seeds through endozoochory. Pyracantha are very attractive for birds, which have contributed to spread this species in natural ecosystems. However, dispersion only is effective if seeds can germinate after passage through of bird digestive tract. Our goal was to assess if birds affect the start, speed and germination rate of P. atalantoides. Germination was compared between seeds from fruit and seed from bird feces. The germination percentage was similar between fruit and feces seeds. However, the seeds pass through the digestive tract delay speed, start and rate of germination. Our results support the idea that the advantage of being consumed by birds may lie more in seed movement away from the parent plant than in any seed treatment itself.

scholarly journals Liquid materials for biomedical research: a highly IT-integrated and automated biobanking solution

2019 ◽  
Vol 43 (6) ◽  
pp. 347-354 ◽  
Author(s):  
Daniela Popp ◽  
Romanus Diekmann ◽  
Lutz Binder ◽  
Abdul R. Asif ◽  
Sara Y. Nussbeck
Keyword(s):  
Life Cycle ◽  
Medical Center ◽  
Research Results ◽  
Long Term Storage ◽  
Medical Centers ◽  
It Systems ◽  
Complete Life Cycle ◽  
The University ◽  
Term Storage

Abstract Various information technology (IT) infrastructures for biobanking, networks of biobanks and biomaterial management are described in the literature. As pre-analytical variables play a major role in the downstream interpretation of clinical as well as research results, their documentation is essential. A description for mainly automated documentation of the complete life-cycle of each biospecimen is lacking so far. Here, the example taken is from the University Medical Center Göttingen (UMG), where the workflow of liquid biomaterials is standardized between the central laboratory and the central biobank. The workflow of liquid biomaterials from sample withdrawal to long-term storage in a biobank was analyzed. Essential data such as time and temperature for processing and freezing can be automatically collected. The proposed solution involves only one major interface between the main IT systems of the laboratory and the biobank. It is key to talk to all the involved stakeholders to ensure a functional and accepted solution. Although IT components differ widely between clinics, the proposed way of documenting the complete life-cycle of each biospecimen can be transferred to other university medical centers. The complete documentation of the life-cycle of each biospecimen ensures a good interpretability of downstream routine as well as research results.

scholarly journals Effect of H2O-Based Low-Pressure Plasma (LPP) Treatment on the Germination of Bambara Groundnut Seeds

Agronomy ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 338
Author(s):  
Naeem Ahmed ◽  
Asad Masood ◽  
Kim S. Siow ◽  
M. F. Mohd Razip Wee ◽  
Rahmat Zaki Auliya ◽  
...  
Keyword(s):  
Food Security ◽  
Seed Germination ◽  
Chemical Modification ◽  
Low Pressure ◽  
Germination Percentage ◽  
Bambara Groundnut ◽  
Pressure Plasma ◽  
Low Pressure Plasma ◽  
Amine Groups

In general, seed germination is improved by low-pressure plasma (LPP) treatment using precursors such as air, nitrogen, argon, or water (H2O). Here, H2O-based LPP treatment using the optimized parameters of 10 W and 10 s improves the germination of Bambara groundnut seeds by 22%. LPP increases the wettability and roughness of the seed hilum while oxidizing the surface with carboxyl and amine groups. In this H2O-based treatment of Bambara groundnut seeds, combinatory etching and chemical modification facilitated the imbibition process and increased the germination percentage. The success of this method has the potential to be scaled up to solve food security with seeds otherwise facing germination-related issues.

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