scholarly journals Effects of sulphuric acid and hot water treatments on seed germination of tamarind (Tamarindus indica L)

2003 ◽  
Vol 2 (9) ◽  
pp. 276-279 ◽  
Author(s):  
Muhammad S. ◽  
A. Amusa N.
Keyword(s):  
Seed Germination ◽  
Sulphuric Acid ◽  
Hot Water ◽  
Tamarindus Indica ◽  
Water Treatments

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 Morphological Characteristics and Seed Germination Improvement of Two Ecotypes of Astragalus armatus Willd. subsp. armatus in Algeria

2018 ◽  
Vol 51 (4) ◽  
pp. 96-107 ◽  
Author(s):  
A. Kheloufi ◽  
L.M. Mansouri ◽  
B. Bouafia ◽  
Y. Khamari ◽  
H. Kheloufi ◽  
...  
Keyword(s):  
Seed Germination ◽  
Sulphuric Acid ◽  
Morphological Characteristics ◽  
Germination Percentage ◽  
Hot Water ◽  
Climate Data ◽  
Intraspecific Variations ◽  
Arid Steppe ◽  
Mean Germination Time ◽  
Different Populations

Abstract Astragalus armatus Willd. subsp. armatus is an endemic shrub of the Northern Africa. Its cultivation and domestication are very limited because of difficulty with seed germination and establishment. In this study, we investigated some plant morphological characteristics in real time and in situ (leaves, fruit and seeds) of different ecotypes of A. armatus, collected from two sites in Algeria (Arid Steppe of Aïn Naga and Condorcet Mountain), which elevation and climate data are very different. Moreover, the role played by the seed coat in seed dormancy of these two different populations was tested by the effects of the pretreatment and its duration on the performance of seed germination, by considering the final germination percentage (FGP) and the mean germination time (MGT). These parameters are estimated for 10 days in Petri dishes and stored in darkness at (25°C). Pre-sowing treatments included immersion in concentrated sulphuric acid for 30, 60 and 90 min, and immersion in hot water (100°C) for 10 min. Statistical analysis showed that the treatment and the ecotypes effects on both FGP and MGT were highly significant (p< 0.0001). Untreated seeds of both ecotypes of A. armatus failed to germinate (except for a few of Condorcet Mountain ecotypes). For both populations, the most effective treatment was immersion in sulphuric acid for 60 min for the ecotype of Arid Steppe of Aïn Naga, and only 30 min for Condorcet Mountain. An excellent germinative strength is characterized by a higher FGP and a reduced MGT. The morphological characteristic and seed germination could be attributed to intraspecific variations resulting from the natural selection of the same species.

Role of the lens in controlling water uptake in seeds of twoFabaceae(Papilionoideae) species treated with sulphuric acid and hot water

2009 ◽  
Vol 19 (2) ◽  
pp. 73-80 ◽  
Author(s):  
Xiao Wen Hu ◽  
Yan Rong Wang ◽  
Yan Pei Wu ◽  
Carol C. Baskin
Keyword(s):  
Sulphuric Acid ◽  
Water Uptake ◽  
Water Entry ◽  
Primary Site ◽  
Hot Water ◽  
Sesbania Sesban ◽  
Dormancy Breaking ◽  
Physical Dormancy ◽  
Water Treatments

AbstractAlthough many studies have been conducted on seeds with a water-impermeable seed or fruit coat (physical dormancy), the primary site of water entry into these seeds after dormancy-breaking treatments is still controversial. Thus, the role of lens, hilum, micropyle and extrahilar regions in water uptake of seeds treated to break physical dormancy was examined inVigna oblongifoliaandSesbania sesban(Fabaceae) following pretreatment with sulphuric acid and hot water. Morphology of seed surfaces in treated versus non-treated seeds of both species was examined with scanning electron microscopy. Most seeds ofV. oblongifoliafirst cracked in the hilum when pretreated with sulphuric acid, but they cracked in both the hilum and extrahilar regions when pretreated with hot water. However, inS. sesbanseeds, a crack formed only in the lens following either acid scarification or hot-water treatments, and the seeds imbibed water only through the lens. These results indicate that the primary site of water entry into seeds following physical dormancy break can vary with species and treatments. Slow, early imbibitionviathe hilum, and subsequent rapid imbibitionviathe lens, may not be detected unless seeds are monitored for several days. Time allowed for imbibition studies may, at least in part, explain various interpretations about the role of the lens in physical dormancy reported in the literature.

scholarly journals The Effects of Pre-germination Treatments on Seed Germination and Growth of Wild Guavas in the Kingdom of Eswatini, Southern Africa

2020 ◽  
pp. 28-36
Author(s):  
Thulani Sikhondze ◽  
Kwanele A. Nxumalo ◽  
Michael T. Masarirambi ◽  
Paul K. Wahome ◽  
Mathole G. Zwane
Keyword(s):  
Seed Germination ◽  
Sulphuric Acid ◽  
Growth And Development ◽  
Seed Priming ◽  
Psidium Guajava ◽  
Germination Percentage ◽  
Hot Water ◽  
Distilled Water ◽  
Ecological Zones ◽  
Poor Seed

Dormancy is a condition where seeds will not germinate even when the environmental conditions (water, temperature and aeration) are permissive for germination. Wild guavas (Psidium guajava L.) are very popular in all agro-ecological zones of Eswatini. Farmers have shown an interest towards guava cultivation but have to cope with the shortage of quality propagation material. The demand is not fulfilled because of unavailability of superior seedling rootstocks, which might be due to poor seed germination and seedling growth. Nevertheless, it has been reported that guava seeds exhibited seed dormancy, which affects their growth and development. The experiment was carried out to study effects of different pre-germination methods on seed germination of guava. The study was conducted at the University of Eswatini, Luyengo Campus. The objective of the study was to get maximum germination of guava seeds in as short a time as possible. Four methods were used i.e.,  soaking in distilled water for five days at room temperature, soaking in hot water at 80ºC for three minutes, subjecting seeds to heat at 80ºC in oven for six minutes and soaking in 20% dilute sulphuric acid for three minutes. All these treatments significantly decreased days to germination of seeds compared with the control. Among the methods, treatment of guava seeds with 20% dilute sulphuric acid for three minutes was judged best with maximum germination percentage (93.3%); lowest germination mean time was observed in seeds soaked in distilled water (31 days). Highest plant height (44 mm) and highest stem girth of (3.37 mm) were recorded from seeds soaked in sulphuric acid after 150 days of sowing. Seeds without any pre-germination treatment showed poor germination (26.7%). On the basis of the findings, it can be recommended that propagators use sulphuric acid in seed priming for higher germination, growth and development.

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 Effects of Different Pretreatment Methods on Germination of Wheat (Triticum aestivum, Poaceae)

2019 ◽  
pp. 1-5
Author(s):  
J. J. Cheboi ◽  
G. Mungabe
Keyword(s):  
Triticum Aestivum ◽  
Seed Germination ◽  
Yield Loss ◽  
Cold Water ◽  
Triticum Aestivum L ◽  
Germination Percentage ◽  
Hot Water ◽  
Breaking Dormancy ◽  
Water Treatments ◽  
Wheat Seeds

Seed dormancy in wheat (Triticum aestivum L.) is a major problem attributing to yield loss. It is a complex evolutionary trait that temporarily prevents seed germination, thus allowing seedling growth at a favorable season. This experiment was conducted to determine the effect of different pre-treatments on germination. The pre-germination treatments included mechanical scarification, soaking seeds in hot water at 100°C for 5 minutes, cold water for 24 hours and untreated (control). Two hundred seeds were used for each treatment. Seeds treated with cold and hot water commenced germination after 4 days and achieved 84%, 78.5% respectively germination within 10 days which was significantly different (P < 0.05) from other treatments, especially the untreated seeds which had the lowest germination of 30%, and commenced first germination after 10 days. The results showed significant differences (P < 0.05) in germination percentage and germination time. Results obtained in this experiment indicate that the pre-germination treatment of Farasi wheat seeds by using cold and hot water treatments can enhance germination of the seeds by breaking dormancy.

Alfa fibers for Cereplast bio-composites reinforcement: Effects of chemical and biological treatments on the mechanical properties

2021 ◽  
pp. 096739112110060
Author(s):  
Mouna Werchefani ◽  
Catherine Lacoste ◽  
Hafedh Belguith ◽  
Chedly Bradai
Keyword(s):  
Charpy Impact ◽  
Impact Testing ◽  
Hot Water ◽  
Cellulose Content ◽  
Twin Screw ◽  
Electron Microscopy Analysis ◽  
Alfa Fibers ◽  
Charpy Impact Testing ◽  
Water Treatments ◽  
The Impact

The present work is a comparative study of the impact of Alfa fiber modifications on the Cereplast composites mechanical behavior. Various treatments have been employed, including mechanical, soda, saltwater-retting, hot-water treatments and enzymatic treatment using xylanase. Chemical and morphological analyses were carried out in order to determine the changes of the biochemical composition and the dimensions of fibers. Cereplast composites reinforced with Alfa fibers were fabricated using a twin-screw extrusion followed by an injection molding technique with a fiber load of 20 wt. %. Resulting materials were assessed by means of tensile, flexural and Charpy impact testing. Scanning Electron Microscopy analysis was carried out to investigate the interfacial properties of the composites. The results have shown a significant enhancement of mechanical strengths and rigidities for the xylanase-treated fiber composites, owing to the increase of cellulose content, the enhancement of defibrillation level and the improvement of matrix-fiber adhesion. The data proved that the technology of enzymes can be used as a powerful and eco-friendly approach to modify fiber surfaces and to increase their potential of reinforcement.

scholarly journals Accelerating Seed Germination and Juvenile Growth of Sorghum (Sorghum bicolor L. Moench) to Manage Climate Variability through Hydro-Priming

Atmosphere ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 419
Author(s):  
Siaka Dembélé ◽  
Robert B. Zougmoré ◽  
Adama Coulibaly ◽  
John P. A. Lamers ◽  
Jonathan P. Tetteh
Keyword(s):  
Seed Germination ◽  
Climate Variability ◽  
Germination Rate ◽  
Dry Weight ◽  
Seed Priming ◽  
Seedling Development ◽  
Hot Water ◽  
Crop Failure ◽  
Simple Method ◽  
Early Season

Agriculture in Mali, a country in Sahelian West Africa, strongly depends on rainfall and concurrently has a low adaptive capacity, making it consequently one of the most vulnerable regions to climate change worldwide. Since early-season drought limits crop germination, and hence growth, ultimately yield during rain-fed depending on production is commonly experienced nowadays in Mali. Germination and establishment of key crops such as the staple sorghum could be improved by seed priming. The effects of hydro-priming with different water sources (e.g., distilled, tap, rain, river, well water) were evaluated respectively for three priming time durations in tepid e.g., at 25 °C (4, 8, and 12 h) and by hot water at 70 °C (in contrast to 10, 20, and 30 min.) in 2014 and 2015. Seed germination and seedling development of nine sorghum genotypes were monitored. Compared to non-primed seed treatments, hydro-priming significantly [p = 0.01] improved final germination percentage, germination rate index, total seedling length, root length, root vigor index, shoot length, and seedling dry weight. The priming with water from wells and rivers resulted in significant higher seed germination (85%) and seedling development, compared to the three other sources of water. Seed germination rate, uniformity, and speed were enhanced by hydro-priming also. It is argued that hydro-priming is a safe and simple method that effectively improve seed germination and seedling development of sorghum. If used in crop fields, the above most promising genotypes may contribute to managing early season drought and avoid failure of seed germination and crop failure in high climate variability contexts.

Seed germination biology of sweet acacia (Vachellia farnesiana) and response of its seedlings to herbicides

Weed Science ◽  
2021 ◽  
pp. 1-19
Author(s):  
Bhagirath S. Chauhan ◽  
Shane Campbell ◽  
Victor J. Galea
Keyword(s):  
Sodium Chloride ◽  
Seed Germination ◽  
Development Stage ◽  
Hot Water ◽  
Control Treatment ◽  
Similar Species ◽  
Weed Species ◽  
Physical Dormancy ◽  
Seed Biology ◽  
Wide Range

Abstract Sweet acacia [Vachellia farnesiana (L.) Willd.]is a problematic thorny weed species in several parts of Australia. Knowledge of its seed biology could help to formulate weed management decisions for this and other similar species. Experiments were conducted to determine the effect of hot water (scarification), alternating temperatures, light, salt stress, and water stress on seed germination of two populations of V. farnesiana and to evaluate the response of its young seedlings (the most sensitive development stage) to commonly available POST herbicides in Australia. Both populations behaved similarly to all the environmental factors and herbicides; therefore, data were pooled over the populations. Seeds immersed in hot water at 90 C for 10 min provided the highest germination (88%), demonstrating physical dormancy in this species. Seeds germinated at a wide range of alternating day/night temperatures from 20/10 C (35%) to 35/25 C (90%) but no seeds germinated at 15/5 C. Germination was not affected by light, suggesting that seeds are nonphotoblastic and can germinate under a plant canopy or when buried in soil. Germination was not affected by sodium chloride concentrations up to 20 mM and about 50% of seeds could germinate at 160 mM sodium chloride, suggesting its high salt tolerance ability. Germination was only 13% at −0.2 MPa osmotic potential and no seeds germinated at −0.4 MPa, suggesting that V. farnesiana seeds may remain ungerminated until moisture conditions have become conducive for germination. A number of POST herbicides, including 2,4-D + picloram, glufosinate, paraquat and saflufenacil, provided >85% control of biomass of young seedlings compared with the nontreated control treatment. Knowledge gained from this study will help to predict the potential spread of V. farnesiana in other areas and help to integrate herbicide use with other management strategies.

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