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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Breaking of seed dormancy in Iris suaveolens Boiss. et Reuter under in vitro conditions

100%
Hajyzadeh M., Yildirim M. U., Mokhtarzadeh S., Sarihan E. O., Khawar K. M.
Acta Scientiarum Polonorum. Hortorum Cultus
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2019
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tom 18
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nr 4
Iris species have great economic importance for their use in ornamental and pharmaceutical industry. Flora of Turkey reports about 43 local taxons of which 16 are endemic. Iris suaveolens Boiss. et Reuter is an endemic species with high seed dormancy and has high tolerance to cold and drought. This study focused on seed dormancy break of I. suaveolens under in vitro conditions. In the first experiment, the seeds were given stratification treatment on MS medium containing different concentrations of BAP with or without NAA. The 2nd experiment reports effects of alternative combinations of cold (at 4°C, 24 h dark) – warm (16 h light photoperiod) conditions on medium containing different concentrations of plant growth regulators on agar solidified MS medium. Both experiments showed about 8.33% seed germination against 64.5% seed viability as confirmed by tetrazolium test. All germinating seeds were abnormal and very weak. In the third experiment, 10 minutes acid scarified seeds cultured at 24°C in 16 h light photo period on MS medium achieved 60.0% germination. Similar treatment under cold + dark condition was inhibitory and failed to show identical results. This underlines the importance of acid scarification, photoperiod and warm treatments of I. suaveolens seeds to break seed dormancy. All germinated seeds showed normal growth and development under field conditions.
2

Effect of gibberellins, kinetin and spermine on dormancy breaking and germination of common ash [Fraxinus excelsior L.] seed

86%
Lewandowska U., Szczotka Z.
Acta Physiologiae Plantarum
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1992
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tom 14
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nr 4
3
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Effects of dormancy breaking in stored seeds on germinability and seedling emergence of Tilia platyphyllos

72%
Tylkowski T.
Dendrobiology
|
2006
|
tom 56
79-84
Fruits of large-leaved lime dried to 10% may be stored for 16 years in sealed containers at –3°C without loosing seed viability. Dormancy of seeds, extracted from hard fruit coats, may be released after chemical scarification in concentrated sulphuric acid for 10 minutes, followed-by stratification without any medium (chilling) at the temperature of 3°C, for 20–24 weeks, i.e. until the first seeds start to germinate. After such pretreatment, during the germination test conducted at alternating temperatures 3~15°C (16 + 8 hours/day) seeds germinate near 90% in several weeks. For seedling production scarified and stratified seeds should be sown in early spring into trays under a plastic tunnel which ensures a high percentage of seedlings emergence. Sowing of the pretreated seeds in spring in a open nursery gives poor results.
4
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Dormancy breaking, germination, and seedling emergence from seeds of Crataegus submollis

72%
Bujarska-Borkowska B.
Dendrobiology
|
2007
|
tom 58
9-15
Effects of several stratification variants on seed dormancy breaking were compared in Crataegus submollis Sarg. (hairy cockspur-thorn or Quebec hawthorn). Ripe seeds were collected (in October), cleaned, and dried to a moisture content of 7–12%. Seed dormancy in this species was broken most effectively by warm-cold stratification of nutlets, in a substrate or without any substrate, at 15~25°/3°C or 20~30°/3°C, i.e. with a cyclically alternating warm stage (16+8 hrs or 24+24 hrs/cycle) lasting 16–20 weeks, followed the cold stage lasting ca. 20 weeks, i.e. till the appearance of the first germinating seeds. After stratification, emergence rate is equally high (ca 50%) at cyclically alternating temperatures of 3~15°C and 3~20°C (16+8 hrs). Chemical scarification of nutlets in 96% sulphuric acid for 3 hrs, followed by warm-cold stratification at 20~30°/3°C, with a short, 4-week warm stage, also ensures a high emergence rate (58%). Seed desiccation (in nutlets) slowly to a moisture content of 10–12%, after stratification in a substrate or without any substrate as well as after scarification, results in a reduced emergence rate, especially if seeds are dried to the lower moisture content. Seed storage (in nutlets after drying to a moisture content of 10%) for 10 years at –3°C, does not decrease the emergence rate (93%) after stratification at 20~30°/3°C in a substrate, with a cyclically alternating warm stage (24+24 h) lasting 16 weeks.
5
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Activity of phosphofructokinase and phosphoenolopyruvate carboxylase in Norway maple (Acer platanoides L.) seeds during dormancy breaking

72%
Krawiarz K., Szczotka Z.
Dendrobiology
|
2002
|
tom 47
We analysed changes in the activity of phosphofructokinase (PFK) and phosphoenolopyruvate carboxylase (PEPC), and in the glucose and sucrose contents of Norway maple seeds stratified at 3°C (dormancy broken) or treated at temperature 15°C (dormancy not broken). We found that changes in the activity of enzymes are not linear, and 2-3 stages may be distinguished. Dormancy breaking and seed germination is associated with a high activity of PFK and PEPC, and a high glucose level in embryo axes.
6
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Functional analysis of ABI5 and RGL2 in dormancy breaking of Acer platanoides L. seeds

58%
Staszak A., Guzicka M., Maslowska S., Pawlowski T. A.
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
|
2013
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tom 94
|
nr 3
7
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Dormancy breaking in Savin juniper [Juniperus sabina L.] seeds

58%
Tylkowski T.
Acta Societatis Botanicorum Poloniae
|
2010
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tom 79
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nr 1
27-29
Savin juniper (Juniperus sabina L.) is a relict shrub in Poland with only one natural stand in Pieniny Mts. Se- eds require warm followed by cold stratification to overcome dormancy. Application of temperature regime at 20°/3°C layout, for 14 and 17 weeks respectively, is more effective than stratification at 15°/3°C. Interruption of warm stratification phase after 7 weeks and seeds drying at room temperature for 3-days with warm stratification follow-on resulted in increasing of germination capacity from 25% to approximately 45%. Germinated seeds pricked to substrate into containers gave seedlings 3 cm high when cultivated under plastic tunnel in the first vegetation season.
8

Influence of temperature and abscisic and gibberellic acids on polyamine biosynthesis in European beech (Fagus sylvatica L.) seeds during dormancy breaking

58%
Krawiarz K., Szczotka Z.
Acta Biologica Cracoviensia. Series Botanica
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2008
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tom 50
|
nr 1
The effects of the exogenous growth regulators abscisic and gibberellic acids (ABA and GA3) on the activity of arginine (ADC) and ornithine decarboxylases (ODC) during dormancy breaking were studied in beech seed. During cold-stratification at 3°C, ADC and ODC activity increased rapidly starting from week 7 in embryo axes and week 8 in cotyledons. At 15°C, ADC activity was higher than ODC activity in embryo axes until week 7 and in cotyledons until week 8. Exogenous growth regulators clearly affected ADC and ODC activity. In embryo axes, ADC activity reached its maximum under the influence of GA3 between weeks 4 and 8. In the control variant (water temp. 3°C), enzymatic activity was moderately high, peaking in week 9 when a high proportion of seeds already showed germinability. In cotyledons the influence of GA3 on ADC activity was noticeable particularly during the first and last weeks. In the control variant the pattern of changes in the activity of this enzyme was similar but at a much lower level. ABA in both organs clearly inhibited ADC activity, but particularly at the end of the experiment. ODC activity in all variants of the experiment was higher in embryo axes than in cotyledons. The dynamics of change in ODC activity were similar to the changes in ADC activity in embryo axes and in cotyledons.
9

Wplyw krotkiego dzialania goracej wody, chemicznej skaryfikacji i kwasu giberelinowego na kielkowanie nasion slazowca pensylwanskiego [Sida hermaphrodita [L.] RUSBY]

58%
Dolinski R., Kociuba W., Kramek A.
Zeszyty Problemowe Postępów Nauk Rolniczych
|
2007
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tom 517
|
nr 1
139-147
Seeds of Virginia mallow freshly harvested and after 6, 12 and 18 months of storage were tested. Two experiments were conducted. In one of them, seeds were soaked for 5, 10 and 20 seconds into the hot water (50-100°C), quickly cooled and sown onto the water-wetted filter paper in Petri dishes. In the other, seeds were immersed for 10, 20 and 30 minutes in concentrated sulphuric acid and after washing out, sown onto the filter paper wetted with water or gibberellic acid solution (1 mmol). Hard seeds of Virginia mallow stopped their dormancy due to hot water treatment. Fresh seeds improved their germination after treatment with water at 100-70°C. After one-year storage, seeds also positively reacted towards 60°C, as well as to 50°C after a year and a half. One-and-half-year-old seeds after treatment with 70°C for 20 seconds showed the best germination (90.5%). Positive influence of chemical scarification on seed germination was observed for all testing dates. Fresh seeds increased their germination after 30 minutes of sulphuric acid treatment from 4.5% to 31.3%, the oldest ones - from 44% up to 91.5%. The influence of gibberellic acid depended on seed coat permeability. Control seeds did not increase the germination due to GA₃. Germination of scarified seeds increased by 0.5-9.7%; the oldest seeds reacted most strongly to the growth hormone.
10

Adenine nucleotides and energy charge during dormancy breaking in embryo axes od Acer platanoides and Fagus sylvatica seeds

58%
Krawiarz K., Szczotka Z.
Acta Physiologiae Plantarum
|
2005
|
tom 27
|
nr 4A
We analysed changes in AMP, ADP, and ATP concentrations and adenylate energy charge in Norway maple (Acer platanoides L.) and European beech (Fagus sylvatica L.) seeds during dormancy breaking (at 3 °C) and in the control variant at 15 °C. Values of the studied indicators in stratified beech seeds were generally higher at 15 °C, at least until germination (+3 °C). By contrast, in maple seeds, the values recorded during dormancy breaking by cold stratification were much higher than at 15 °C. Three peaks (usually in weeks 3, 6, and 8) were observed in maple seeds at 3 °C, but not at 15 °C. Among adenine nucleotides, AMP reached the highest levels in both species in both variants of the experiment.
11

Proteins and polyamines during dormancy breaking of European beech [Fagus sylvatica L.] seeds

58%
Szczotka Z., Pawlowski T., Krawiarz K.
Acta Physiologiae Plantarum
|
2003
|
tom 25
|
nr 4
12

Wczesne przerywanie okresu spoczynku bulw w aspekcie szybkiej diagnostyki wirusowej nowych odmian ziemniaka

51%
Wrobel S.
Progress in Plant Protection
|
2008
|
tom 48
|
nr 2
552-555
13

Wpływ temperatury na fazy fenologiczne i jakość kwiatostanów lilaka podczas pędzenia listopadowego

51%
Jedrzejuk A., Lukaszewska A.
Zeszyty Problemowe Postępów Nauk Rolniczych
|
2008
|
tom 525
Celem niniejszej pracy było określenie wpływu różnych temperatur na długość cyklu pędzenia oraz jakość kwiatostanów lilaka pospolitego ‘Mme Florent Stepman’ w terminie listopadowym. Krzewy pędzono w dwóch temperaturach: 15°C przez cały cykl pędzenia oraz w wysokich temperaturach, standardowych dla tego terminu. Wysokość temperatury miała istotny wpływ na długość trwania poszczególnych faz fenologicznych oraz jakość kwiatostanów u lilaka. Pędzenie w 15°C trwało 49 dni w porównaniu z pędzeniem standardowym trwającym średnio 23 dni. W tej kombinacji faza pęcznienia pąka kwiatostanowego rozpoczęła się 26. dnia pędzenia. Kwiatostany z krzewów pędzonych w 15°C były bardziej dekoracyjne od kwiatostanów z krzewów pędzonych w temperaturach standardowych. Wyniki doświadczeń zdają się zaprzeczać powszechnie panującemu przekonaniu, że dla przełamania spoczynku bezwzględnego w listopadzie konieczne jest stosowanie bardzo wysokich temperatur początkowych. Temperatura 15°C pozwala pobudzić pąki do wzrostu, choć trwa to 3 tygodnie dłużej niż po zastosowaniu wysokich temperatur.
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