POTENCIAIS HÍDRICOS E TEORES DE ÁGUA NA GERMINAÇÃO DE SEMENTES E CRESCIMENTO INICIAL DE MILHETO

2016 ◽  
Vol 15 (3) ◽  
pp. 619
Author(s):  
TATHIANA ELISA MASETTO ◽  
ELISÂNGELA LEITE VARGAS ◽  
SILVANA DE PAULA QUINTÃO SCALON
Keyword(s):  
Seed Germination ◽  
Moisture Content ◽  
Water Content ◽  
Pearl Millet ◽  
Water Availability ◽  
Pennisetum Glaucum ◽  
Germination Percentage ◽  
Initial Growth ◽  
Water Potentials ◽  
Water Contents

RESUMO – O processo germinativo se inicia com a absorção de água pelas sementes e é influenciado pela disponibilidade hídrica e pelo teor de água das sementes. Objetivou-se avaliar os efeitos de diferentes potenciais hídricos e de teores de água das sementes na germinação e crescimento de plântulas de milheto. Foram utilizadas sementes com teores de água de 14,1%; 16,1%; 20,8% e 21,9% posicionadas em caixas plásticas do tipo “gerbox” sobre duas folhas de papel toalha para germinação previamente umedecidas com 10 mL de soluções de polietilenoglicol (PEG 6000) nos potenciais hídricos de 0,0; -0,1; -0,2; -0,3; -0,4 e -0,6 MPa. As sementes foram mantidas em câmara de germinação a 25 °C sob luz branca constante. O delineamento experimental foi o inteiramente casualizado, em esquema fatorial 4 x 5, utilizando-se quatro repetições de 50 sementes cada. As sementes foram avaliadas quanto à primeira contagem, germinação, comprimento da raiz, comprimento da parte aérea, comprimento total, massa fresca e seca de plântulas. A redução dos potenciais hídricos associada aos teores de água das sementes afeta negativamente a germinação e o crescimento das plântulas de milheto, principalmente em sementes com o teor de água de 14,1%. As sementes com os teores de água acima de 16,1% são menos suscetíveis à redução das disponibilidades hídricas do substrato a partir do potencial de -0,1 MPa.Palavras-chave: Pennisetum glaucum, polietilenoglicol, teor de água de sementes.WATER POTENTIAL AND MOISTURE CONTENT ON SEED GERMINATION AND INITIAL GROWTH OF PEARL MILLETABSTRACT – The germination process starts with water absorption by seeds and is influenced by the water availability and seeds moisture content. This work aimed to evaluate the effects of different substrate water potentials and the water contents of the seeds on seed germination of pearl millet. The treatments comprised pearl millet seeds with 14.1%, 16.1%, 20.8% and 21.9% moisture content and submitted to the water availability in the substrate of 0.0 (control); -0.1; -0.2; -0.3; -0.4 and -0.6 MPa. Seeds were sowed in two germination papers and positioned inside plastic boxes of the “gerbox” type and maintained at 25ºC. A completely randomized design in a factorial scheme 4 x 5 was used, with four replications of 50 seeds per treatment. The seeds were evaluated through the first counting, germination percentage, aerial part, root length, total length and fresh and dry mass of seedlings. The reduction of the water potentials associated to the seed water contents affected negatively the seeds germination and seedlings growth of pearl millet, especially in seeds with 14.1% water content. The seeds with water content above 16.1% were less sensitive to the decrease in the water availability of the substrate from -0.1 MPa.Keywords: Pennisetum glaucum, polyethylene glycol, seeds water content.

scholarly journals POTENCIAIS HÍDRICOS E TEORES DE ÁGUA NA GERMINAÇÃO DE SEMENTES E CRESCIMENTO INICIAL DE MILHETO

2017 ◽  
Vol 15 (3) ◽  
pp. 619
Author(s):  
TATHIANA ELISA MASETTO ◽  
ELISÂNGELA LEITE VARGAS ◽  
SILVANA DE PAULA QUINTÃO SCALON
Keyword(s):  
Seed Germination ◽  
Moisture Content ◽  
Water Content ◽  
Pearl Millet ◽  
Pennisetum Glaucum ◽  
Dry Mass ◽  
Germination Percentage ◽  
Initial Growth ◽  
Water Potentials ◽  
Randomized Design

RESUMO – O processo germinativo se inicia com a absorção de água pelas sementes e é influenciado peladisponibilidade hídrica e pelo teor de água das sementes. Objetivou-se avaliar os efeitos de diferentes potenciais hídricose de teores de água das sementes na germinação e crescimento de plântulas de milheto. Foram utilizadas sementes comteores de água de 14,1%; 16,1%; 20,8% e 21,9% posicionadas em caixas plásticas do tipo “gerbox” sobre duas folhasde papel toalha para germinação previamente umedecidas com 10 mL de soluções de polietilenoglicol (PEG 6000) nospotenciais hídricos de 0,0; -0,1; -0,2; -0,3; -0,4 e -0,6 MPa. As sementes foram mantidas em câmara de germinação a25 °C sob luz branca constante. O delineamento experimental foi o inteiramente casualizado, em esquema fatorial 4x 5, utilizando-se quatro repetições de 50 sementes cada. As sementes foram avaliadas quanto à primeira contagem,germinação, comprimento da raiz, comprimento da parte aérea, comprimento total, massa fresca e seca de plântulas.A redução dos potenciais hídricos associada aos teores de água das sementes afeta negativamente a germinação e ocrescimento das plântulas de milheto, principalmente em sementes com o teor de água de 14,1%. As sementes com osteores de água acima de 16,1% são menos suscetíveis à redução das disponibilidades hídricas do substrato a partir dopotencial de -0,1 MPa.Palavras-chave: Pennisetum glaucum, polietilenoglicol, teor de água de sementes.WATER POTENTIAL AND MOISTURE CONTENT ON SEED GERMINATION AND INITIAL GROWTH OF PEARL MILLETABSTRACT – The germination process starts with water absorption by seeds and is influenced by the water availabilityand seeds moisture content. This work aimed to evaluate the effects of different substrate water potentials and the watercontents of the seeds on seed germination of pearl millet. The treatments comprised pearl millet seeds with 14.1%,16.1%, 20.8% and 21.9% moisture content and submitted to the water availability in the substrate of 0.0 (control); -0.1;-0.2; -0.3; -0.4 and -0.6 MPa. Seeds were sowed in two germination papers and positioned inside plastic boxes of the“gerbox” type and maintained at 25ºC. A completely randomized design in a factorial scheme 4 x 5 was used, with fourreplications of 50 seeds per treatment. The seeds were evaluated through the first counting, germination percentage,aerial part, root length, total length and fresh and dry mass of seedlings. The reduction of the water potentials associatedto the seed water contents affected negatively the seeds germination and seedlings growth of pearl millet, especially inseeds with 14.1% water content. The seeds with water content above 16.1% were less sensitive to the decrease in thewater availability of the substrate from -0.1 MPa.Keywords: Pennisetum glaucum, polyethylene glycol, seeds water content.

scholarly journals Germination of Styrax camporum Pohl. seeds in response to substrate types, moisture contents and the seed morphology

2013 ◽  
Vol 85 (1) ◽  
pp. 295-306 ◽  
Author(s):  
Edson Simão ◽  
Adriana T. Nakamura ◽  
Massanori Takaki
Keyword(s):  
Seed Germination ◽  
Moisture Content ◽  
Riparian Forest ◽  
Field Capacity ◽  
Germination Percentage ◽  
Seed Morphology ◽  
Moisture Contents ◽  
Water Potentials ◽  
Time Periods ◽  
Substrate Types

This study evaluated the contributions of Styrax camporum seed morphology (size of seeds, presence or absence of endocarp attached to the seed), different substrates (filter paper, vermiculite, sand and the soils of cerrado s. str., cerradão and a riparian forest), different water potentials (0, -0.1, -0.2, -0.3, -0.4 and -0.5 MPa), light and temperature to seed germination. Seed size did not affect the germination percentage when seeds were sown on vermiculite. Seeds were affected by small variations in the moisture content of the tested substrates, showing a significant decrease in germination under water potentials lower than -0.1 MPa, close to the field capacity of cerrado s. str. soils. At the temperatures of 15 and 20°C, a significant decrease in germination was observed. Thus, the availability of water in cerrado soils associated to temperature modulate the distribution of germination in this species. Seed morphology contributes to the maintenance of seeds in the soil, and the lack of synchrony in seed germination spreads the distribution of germination in time. These peculiarities allow the emergency of seedlings at different time periods and establishment conditions, an adaptative response of S. camporum to the cerrado environment.

scholarly journals Soluble sugars and germination of Annona emarginata (Schltdl.) H. Rainer seeds submitted to immersion in GA3 up to different water contents

2014 ◽  
Vol 36 (spe1) ◽  
pp. 281-287 ◽  
Author(s):  
Juliana Iassia Gimenez ◽  
Gisela Ferreira ◽  
Jaqueline Malagutti Corsato
Keyword(s):  
Seed Germination ◽  
Plant Growth ◽  
Water Content ◽  
Plant Growth Regulator ◽  
Soluble Sugars ◽  
Germination Percentage ◽  
Initial Water Content ◽  
Germination Test ◽  
Initial Water ◽  
Water Contents

The objective of this study was to evaluate the effect of different water contents achieved by Annona emarginata (Schltdl.) H. Rainer seeds during immersion in GA3 solutions, in variation of soluble sugars levels and germination. Seeds with 10% of initial water content were submitted to imbibition in GA3 solutions with concentrations of 0; 250; 500; 750 and 1000 mg L-1 and when they reached the water content of 15%, 20%, 25%, 30% and 35%, the quantification of soluble sugars levels and germination test were performed. Seeds immersed up to they reach 15% of water with GA3 and immersed up to the water acquisition of 20% without GA3, presented higher soluble sugars levels and germination percentage, which were decreased when the seeds reached 30% and 35% of water, independently of the presence of the plant growth regulator. It was conclude that different water contents reached by the seeds in immersion treatments with GA3 affect the soluble sugars levels and germination percentage of Annona emarginata seeds. Thus, in treatments with Annona emarginata, the seeds must remain immersed in water without GA3 up to they reach 20% of water, as higher water contents (35%) reduce the soluble sugars levels and the seed germination percentage.

scholarly journals Drying and storage of Eugenia involucrata DC. seeds

2003 ◽  
Vol 60 (3) ◽  
pp. 471-475 ◽  
Author(s):  
Angela Maria Maluf ◽  
Denise Augusta Camargo Bilia ◽  
Claudio José Barbedo
Keyword(s):  
Moisture Content ◽  
Water Content ◽  
Cold Storage ◽  
Native Species ◽  
Plastic Bags ◽  
Physiological Quality ◽  
Drying Rates ◽  
And Storage ◽  
Water Contents

The physiological quality of seeds of native species is important to produce healthy saplings and therefore guarantee the success of programs to recover disturbed vegetation. This reinforces the necessity for investigating the physiological quality of those seeds. To evaluate the effects of different drying rates on the germination, moisture content and storability of Eugenia involucrata diaspores, mature fruits collected at Mogi Guaçu, SP, Brazil had their epi- and mesocarps removed by washing and were dried at 30, 40 or 50ºC until their water content was reduced from 57% (fresh diaspores) to 13% (final drying), totaling six drying levels. In a second experiment, diaspores had their moisture content reduced from 57% to 49%, at 30ºC, totaling six drying levels (0h, 1h, 2h, 3h, 4h and 5h), and were kept for 180 days in plastic bags under cold storage. The drying rate had no effect on tolerance to desiccation by E. involucrata diaspores; water contents lower than 51% decreased both germinability and storability. Diaspores can be stored for up to 180 days as long as their water content is reduced to 53% and they are kept inside plastic bags under cold storage.

scholarly journals Morphological and germination response variability in seeds of wild yellow gentian (Gentiana lutea L.) accessions from northwest Spain

Botany ◽  
2012 ◽  
Vol 90 (8) ◽  
pp. 731-742 ◽  
Author(s):  
Félix Pérez-García ◽  
Federico Varela ◽  
M. Elena González-Benito
Keyword(s):  
Seed Germination ◽  
Water Content ◽  
Germination Rate ◽  
Seed Mass ◽  
Germination Percentage ◽  
Gentiana Lutea ◽  
Moist Chilling ◽  
Mean Germination Time ◽  
Wild Accessions ◽  
Seed Water Content

Gentiana lutea L. (yellow gentian, Gentianaceae) is an important medicinal plant under protection as endangered species in most European countries. The aim of this work was to evaluate variation in seed mass, seed water content, and seed germination among 56 wild accessions of G. lutea. The effect of gibberellic acid (GA3), putrescine, moist chilling, and level of ripeness of seeds on subsequent germination was also investigated. Seeds of G. lutea showed physiological dormancy (final germination percentages ranged from 0% to 11%, depending on the accession) and GA3 enhanced seed germination drastically in all the accessions. The highest germination (99%) of GA3-treated seeds was reached at 15 °C. Final germination percentage and germination rate (as expressed by mean germination time), as well as seed mass and seed water content, varied significantly among accessions. In general, 1 year moist chilling did not significantly enhance G. lutea seed germination. For most accessions, no significant differences were found between fully ripe seeds and less ripe seeds for seed water content, seed mass, and seed germination. Applications of GA3 were always most effective than those of putrescine for increasing seed germination.

scholarly journals Hasil, Kualitas Fisik Polong dan Biji Beberapa Genotipe Kacang Tanah menurut Ragam Lengas Tanah pada Fase Generatif

2018 ◽  
Vol 46 (1) ◽  
pp. 71 ◽  
Author(s):  
Agustina Asri Rahmianna ◽  
Dan Joko Purnomo
Keyword(s):  
Drought Stress ◽  
Moisture Content ◽  
Water Content ◽  
Soil Water ◽  
Water Availability ◽  
Relative Water Content ◽  
Pod Yield ◽  
Relative Water ◽  
Leaf Relative Water Content ◽  
Generative Stage

Drought stress during generative stage affected pod yield, yield components, seed and pod qualities of groundnut (Arachis hypogaea L.). The reseach was carried out to assess the effect of drought stress at various soil water availabilities during generative stage on pod yield, pod and seed physical qualities. The experiment was conducted at Muneng Experimental Farm, Probolinggo District during July-October 2012. Five genotypes were arranged in a RCB design, with 3 replicates. The replications were nested into four treatments of soil water availability (0-100, 0-85, 0-70,0-55 days after sowing/DAS). The pods were harvested at 102 days after sowing. The result showed that the shorter the water availability, the lower the leaf relative water content, pod and seed water contents, number of mature pods, seed size, and intact seeds weight. Pod yield reduced when water was available upto 55 DAS only. Turangga variety had the highest pod yield (1.626 ton ha-1) with low pod and seed physical qualities. GH-51 yielded in 1.076 ton ha-1 with superior pod and seed physical qualities. Despite of its lowest pod yield (0.964 ton ha-1), J-11 produced the same pod and seed physical qualities as GH 51 did. ICGV 86590 was superior on its pod yield (1.338 ton ha-1) with low pod and seed physical qualities. Kancil variety did not perform any superiority.<br /><br />Keywords: intact seeds, leaf relative water content, pod moisture content, seed moisture content

scholarly journals Solid Matrix Priming Hastens Canterbury Bells Seed Germination

2002 ◽  
Vol 12 (2) ◽  
pp. 268-270 ◽  
Author(s):  
Theresa L. Bosma ◽  
Janet C. Cole ◽  
Kenneth E. Conway ◽  
John M. Dole
Keyword(s):  
Seed Germination ◽  
Germination Percentage ◽  
Solid Matrix ◽  
Curvilinear Relationship ◽  
Calcined Clay ◽  
Water Potentials

Canterbury bells (Campanula medium `Champion Blue') seeds were primed using calcined clay at 68 °F (20 °C) for 1, 3, or 5 days at water potentials (Ψ) of -25, -20, -18, or -16 bars (-2.5, -2.0, -1.8, or -1.6 MPa). Germination was fastest (3.0 to 3.1 days) after priming with a Ψ of -18 or -16 bars for 5 days. Seeds primed for 3 or 5 days with moisture present germinated faster than nonprimed seeds, but time to 50% germination (T50) was longer when seeds were primed for 1 day regardless of Ψ compared to nonprimed seed. Germination uniformity decreased (time from 10% to 90% germination, T10-90, increased) as Ψ increased. Although a curvilinear relationship existed between T10-90 and priming duration, T10-90 did not differ between nonprimed seeds and seeds in any priming treatment except those primed for 3 days with 20% moisture (-16 bars). Priming did not affect total germination percentage (97%).

scholarly journals Effect of Coconut Water on Pre-Sowing Treatments Additive on Seed Germination and Initial Seedlings Growth Performance of Kamagong (Diospyros discolor)

2020 ◽  
pp. 58-71
Author(s):  
Marne G. Origenes ◽  
Renato L. Lapitan
Keyword(s):  
Seed Germination ◽  
Growth Performance ◽  
Germination Percentage ◽  
Mean Value ◽  
Coconut Water ◽  
Leaf Width ◽  
Indigenous Species ◽  
Initial Growth ◽  
Seedling Height ◽  
Number Of Leaves

Mabolo (Diospyros discolor), which is an indigenous species locally known as Kamagong, is popularly called “iron-wood”. With over-exploitation, these species are now threatened and are becoming extinct. Hence, it is the only way to conserved and save this economically valuable species by using nursery techniques with appropriate pre-sowing treatments. Therefore, the present study was attempted to evaluate the effect of coconut water on pre-sowing treatments additive on seed germination and initial growth performance of Kamagong (D. discolor). The seeds were extracted and subjected to the following treatments for 12 hours: Soaking in 100% water which is the control (T1), soaking with 50% of coconut water and 50% water (T2), and soaking in 100% coconut water (T3). The results showed that T3 had the highest germination mean value (78.33%), mean seedling height (11.80 cm) and mean number of leaves (2.04). By contrast, T2 (50% coconut water + 50% water) obtained the least germination mean value (76.67%), mean seedling height (11.63 cm) and mean number of leaves (2.00). However, there were no significant differences in the germination percentage, seedling height and number of leaves among all treatments at (p ≤ 0.05). The seeds subjected to T2 and T3 were significantly (p ≤ 0.05) better than seeds subjected to T1, having a mean root collar diameter (RCD) value of 3.98 mm, 3.75 mm and 3.48 mm, respectively. In terms of leaf measurements, the seedlings subjected to T2 and T3 had the highest leaf width value of 5.18 cm and 4.97 cm, respectively, whereas the seedlings subjected to T1 had the significantly lowest leaf width of 4.88 cm. Moreover, there was no significant effect among all treatments in terms of leaf and root length. Furthermore, it was observed in the study that fungal pathogens should also be taken into account as the pathogens are associated with the reduction of the germination percentage of the D. discolor seeds. Also, the study found out that seeds treated with 50% and 100% coconut water positively influenced the germination and initial seedling growth performance of D. discolor.

scholarly journals Predicting Seed Germination of Safflower (Carthamus Tinctorius) Cultivars Using Hydrotime Model

2017 ◽  
Vol 50 (1) ◽  
pp. 79-87
Author(s):  
S.A. Tabatabae ◽  
O. Ansari
Keyword(s):  
Seed Germination ◽  
Water Availability ◽  
Germination Percentage ◽  
Carthamus Tinctorius ◽  
Safflower Seed ◽  
Arid Environments ◽  
Crop Establishment ◽  
Hydrotime Model ◽  
Short Time ◽  
Peg 600

Abstract Safflower (Carthamus tinctorius) is a highly branched, herbaceous, thistle-like annual plant. It is commercially cultivated for vegetable oil extracted from the seeds, which is cultivated under arid environments. In such environments, the water needed for germination is available for only a short time and, consequently, successful crop establishment depends not only on rapid and uniform germination of the seedlot, but also on its ability to germinate under low water availability. All of these attributes can be analyzed through the hydrotime model (HT). Safflower seeds were germinated in various polyethylene glycol (PEG 600) solutions to obtain water potentials of 0, -0.2, -0.4, -0.6, and -0.8 Mpa. Results indicated that germination of safflower cultivars decreased significantly with reduction of osmotic potential. The highest germination percentage for Sina (93.06 and 94.02%), Faraman (93.52 and 95.33%), Talaei (94.98 and 93.98%) and Kouseh (93.58 and 95.55%) cultivars were attained from distilled water (0 MPa) and -0.2 MPa, respectively. The hydrotime constant (θH) for Sina, Faraman, Talaei and Kouseh cultivars were 0.93, 0.84, 0.78 and 0.72 MPa d, and the water potential (Ψb(50)) for Sina, Faraman, Talaei and Kouseh cultivars were -0.56, -0.67, -0.64 and -0.77 MPa, respectively. Cumulative germination of safflower seed was higher in Kouseh cultivar, than in Sina, Faraman and Talaei cultivars. Results showed that, hydrotime model is suited to predicting seed germination of safflower seeds. In addition, the information gathered with this work allows us to build mathematical models to predict germination of safflower cultivars in the field under various environments.

Effect of dew-irrigation on seed germination in flax, fenugreek, and fennel

2019 ◽  
Vol 20 (1) ◽  
pp. 269-276
Author(s):  
Saiede Sargol Hosseini ◽  
Hassan Heidari ◽  
Mohammad Eghbal Ghobadi ◽  
Iraj Nosratti
Keyword(s):  
Seed Germination ◽  
Water Availability ◽  
Germination Percentage ◽  
Cold Season ◽  
Control Treatment ◽  
Whole Plant ◽  
The World ◽  
Plant Stage ◽  
Water Stage ◽  
And Control

Abstract Drought limits plants growth. In many parts of the world, crop productions depend on water availability. Seed germination is a sensitive and low water stage in plants. A pot experiment was designed to test the effect of dew-irrigation on seed germination percentage of fennel, flax, and fenugreek. Irrigation treatments included dew-irrigation and control (non-irrigation). Results showed that dew-irrigation increased seed germination compared to control. Treatment of dew-irrigation had seed germination of 92.7%, 78.7% and 63.5% for flax, fenugreek, and fennel, respectively. But none of the seeds of control treatment germinated. Among plants studied, flax which is a cold season plant had the highest percentage of germination by dew-irrigation, and the plants that are the most heat-sensitive, such as fenugreek and fennel, had the lowest germination percentage. Results of this experiment determined that the moisture content in the air is capable to provide the necessary moisture for seed germination of the plants studied. In conclusion, dew-irrigation, due to supply low water, is better to be used at stages with lower water requirement such as germination. The ability of water supply by dew-irrigation at whole plant stage can be studied in the next experiments.

Sign in / Sign up

Export Citation Format

Share Document