Iranian Journal of Seed Research最新文献

{"title":"Effect of Seed Aging and Water Potential on Seed Germination and Biochemical Indices of Fenugreek (Trigonella foenum-graecum) at Different Temperatures","authors":"Hasan Teimori, H. Balouchi, A. Moradi, E. Soltani","doi":"10.29252/YUJS.5.2.105","DOIUrl":"https://doi.org/10.29252/YUJS.5.2.105","url":null,"abstract":"Introduction: Seed germination is one of the most important and complex stages in the plant life cycle and is affected by many hereditary and environmental factors. Various factors affect germination and seedling establishment. Among these factors are the characteristics of the maternal plant (nutrition, genetics), seed treatment stage at harvest time as well as environmental factors (temperature, water potential, and ventilation and soil compaction). In addition, under the influence of seed loss during storage, seed vigor, which is known as the first component of seed quality, decreases. The aim of this study was to investigate germination and biochemichal responses of the aged seeds of Fenugreek to different temperature and humidity ranges. Materials and Methods: This experiment was conducted as a factorial based on a completely randomized design with four replications in the Laboratory of Seed Science and Technology, Faculty of Agriculture, Yasouj University in 2016. The experimental treatments consisted of nine levels of temperature (5, 10, 15, 20, 25, 30, 35, 40 and 45 degrees Celsius), water potential comprised seven levels (zero (control), -0.2, -0.4, -0.6, -0.8, -1 and -1.2 MPa) and seed aging at two levels (no aged (control) and aged seed). Results: In this experiment, the effect of seed aging, water potential and their interactions in each environment on germination indices (germination percentage and germination rate, length and weight vigor index) and biochemical indices (soluble sugar, proline, soluble protein and catalase enzymes) of Fenugreek seeds were significant. The results showed that in the aged seeds, the germination percentage and rate and seedling vigor index tended to decrease with water potential reduction at temperatures below and above 20 degrees Celsius, whereas the amount of biochemical components of the seeds (soluble sugar, soluble protein, proline, and catalase enzyme) increased. Conclusion: In general, germination and biochemical indices of seeds of Fenugreek are sensitive to water potentials, aging, and seed germination temperatures, respectively. In case of reduction in osmotic potential, the germination temperature less than 20 °C resulted in increased germination resistance of fenugreek seeds to a more negative water potential.","PeriodicalId":14578,"journal":{"name":"Iranian Journal of Seed Research","volume":"123 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86760950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Stratification and Its Combination with Gibberellic Acid on Seed Dormancy Breaking of Echinophora platyloba","authors":"A. A. Sourki, Z. Hosseni, S. Fallah","doi":"10.29252/YUJS.5.2.91","DOIUrl":"https://doi.org/10.29252/YUJS.5.2.91","url":null,"abstract":"Extended Abstract Introduction: Seeds are a good option when it comes to propagation and protection programs of medicinal plants. Although seed dormancy is an adaptive strategy for wild medicinal plants, it is considered as an undesirable trait in their domestication and cultivation, representing a problem to be solved. Echinophora platyloba seeds have dormancy despite their remarkable medicinal properties. Materials and Methods: In order to break seed dormancy, three separate experiments, namely stratification, hormonal treatment and their combination were conducted. For stratification, 10 samples were placed in a wet bed at 5 °C for 2, 4, 6, 8, 10, 12, 14 and 16 weeks and were compared, using a completely randomized design with three replications. For hormonal treatment, the seeds were placed in GA concentrations of 0, 500 and 1000 ppm for 24 hours and were then transferred to germination conditions. However, since the dormancy breaking did not occur, this experiment was not pursued any more. For combined application of hormone and stratification, seeds were placed at above-mentioned concentrations of gibberellin for 24 hours at 20 °C and then gibberellin solutions were removed and the seeds were transmitted to 5 °C and were compared for 2, 4, 6, 8 weeks with a CRD factorial experiment with three replications. The first factor was concentration of gibberellin in three levels and the second factor was the duration of stratification in 4 levels. Results: Stratification had a positive effect on seed dormancy breake and 16-week chilling led to highest germination percentage and rate and vigor indices. The combined application of hormonal treatments accelerated dormancy release and improved seed germination characteristics, which peaked in 8 weeks. 8-week stratification treatment at 5 °C with 1000 ppm gibberellic acid was the best treatment for overcoming dormancy in Echinophora-platyloba seeds. Conclusion: It seems that seed dormancy of Echinophora seeds is physiological, which successfully broke by moist chilling and simultaneous application of stratification and gibberellin. Although Gibberellin had no effect on dormancy break, it reduced the need for stratification. Their combined application showed synergistic effects on dormancy release.","PeriodicalId":14578,"journal":{"name":"Iranian Journal of Seed Research","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78117029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Growth Promoting Bacteria and Salicylic Acid on Melon (Cucumis melo) Seed Germination and Seedling Growth under Salt Stress","authors":"H. N. Nasrabadi, M. Moradi, Mohammad Nasser Modoodi","doi":"10.29252/YUJS.5.2.139","DOIUrl":"https://doi.org/10.29252/YUJS.5.2.139","url":null,"abstract":"Introduction: Using plant growth regulators is one of the methods which can improve plant growth against environmental stresses such as salinity. Salicylic acid plays an important role in the regulation of physiological processes, including germination. Nowadays, the use of growth promoting bacteria is on the rise as it promotes seed vigor, uniformity, germination percentage and brings about better seedling establishment. Growth promoting bacteria can be effective in increasing plant resistance to adverse environmental conditions, which is due to the fact that these bacteria facilitate production of plant hormones such as auxin, GA and cytokinins, and bring about the stabilization of nitrogen or phosphorus availability and other nutrients Materials and Methods: This experiment was conducted as factorial in a completely randomized design with three replications. Salicylic acid factor (SA) was selected at two levels (0 and 1 mM). The bacterial treatments included Azotobacter (AZ), Azospirilum (AZP), complex of Azotobacter and Azospirillum (AZ + AZP), and without inoculation (C) and salinity treatment (S) was considered at five levels (0, 50, 100, 150 and 200 mM). Results: The results showed that none of the treatments had a significant effect on germination percentage. Radicle and plumule length, seed vigor index and seedling fresh weight significantly increased at 50 mM NaCl. Generally speaking, the elongation of plant organs when treated with low concentrations of salts may induce osmotic adjustment activity in plants, which may improve growth. Salicylic acid treatment significantly increased germination rate, Radicle and plumule length and seed vigor index. AZ and AZ+AZP increased germination parameters significantly, compared with the control. Generally speaking, the combination of salicylic acid with AZ better improved germination factors, in comparison to AZP and AZ+AZP. These results are indicative of the synergistic relationship between growth promoting bacteria and salicylic acid. Conclusion: Based on the results, pre-treatment of melon seeds with 1 mM salicylic acid and Azotobacter is suggested to improve seed germination and seedling establishment under salinity stress.","PeriodicalId":14578,"journal":{"name":"Iranian Journal of Seed Research","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74863889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Efficiency of Chemical and Mechanical Priming in Breaking Seed Dormancy and Germination Traits of Malva (Malva neglcta)","authors":"F. Mondani, A. Jalilian, Atusa Olfati","doi":"10.29252/YUJS.5.1.55","DOIUrl":"https://doi.org/10.29252/YUJS.5.1.55","url":null,"abstract":"Introduction : Malva ( Malva neglecta ) is one of perennial plants of the Malvaceae family. One of the most important mechanisms for survival of the plants is dormancy, rest or distance in germination and growth; in this case, despite favorable conditions for germination, the seed remains at rest for an indefinite period of time. Seed dormancy is a consistent feature in some seeds, especially weed seeds to optimize distribution of germination over time. Seed dormancy has a very important role in ecological management. The cause of the physical dormancy lies in skin cells outside tier structure that is impermeable to water. In physical dormancy, the seed coat is so hard that it does not allow the embryo to grow during germination. The chemical dormancy of the plants seeds is caused by the presence of inhibitor substances in the outer shell of many fruits and seeds and may also be due to an Enamel layer that blocks the exchange of oxygen. It goes without saying that understanding the ecology of weed germination and dormancy can contribute to long-term management. Therefore, this study was conducted to determine the effects of breaking seed dormancy and the impact of chemical and mechanical treatments on the germination of the Mallow seeds . Materials and Methods: In order to recognize the effects of chemical and mechanical treatments on breaking seed dormancy and some of the Malva ( Malva neglcta ) seeds mechanically scratched with scarification increased. Therefore, seed dormancy is due to hard coated seeds. The seed coat is as one physical barrier against growth of embryo or radicle that inhibits absorption of water and gas exchanges.","PeriodicalId":14578,"journal":{"name":"Iranian Journal of Seed Research","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76152401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of Foliar Application of Salicylic Acid and Spermine on Maternal Plant under Drought Stress on Germination Indices of Purple Coneflower (Echinacea purpurea)","authors":"Hakimeh Darvizheh, M. Zahedi, B. Abbaszadeh, J. Razmjoo","doi":"10.29252/YUJS.5.1.1","DOIUrl":"https://doi.org/10.29252/YUJS.5.1.1","url":null,"abstract":"","PeriodicalId":14578,"journal":{"name":"Iranian Journal of Seed Research","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81441196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Response of Soybean (Williams cv.) Seed Germination to Aqueous Extract of Cocklebur (Xanthium spp.) and Common Lambsquarters (Chenopodium album)","authors":"A. Modhej, R. Farhoudi, Sanaz Edalat","doi":"10.29252/YUJS.5.1.137","DOIUrl":"https://doi.org/10.29252/YUJS.5.1.137","url":null,"abstract":"Introduction: Interference caused through weeds’ and crops’ competition for environmental resources and allelopathy brings about damage in crop species. Allelopathy is defined as a direct or indirect inhibiting or provoking effect of a plant on other plants through the production of chemical compounds introduced into the environment. Although the allelopathic effects of the shoot extracts of Xanthium spp and Chenopodium album on the germination of some crops have already been investigated, very few studies have so far been conducted to evaluate their adverse effects on soybean seedling growth. The aim of this study was to investigate the effect of different concentrations of aqueous extract of cocklebur and lambsquarters on germination and soybean seedling growth indices under Petri and Pot conditions. Materials and Methods: In order to study the allelopathic effects of Cocklebur and Common lambsquarters on germination and seedling growth of soybean, two separate experiments were conducted under petri and pot conditions. In this experiment, the effects of aqueous extract concentrations (25, 50, 75 and 100%) of cocklebur and common lambsquarters were evaluated on seed germination of soybean in a completely randomized design with three replications. In each pot, five soybean seeds were planted with a depth of 2 cm. The extracts were added to the pots for 2 weeks after emergence. Results: Allelopathic effect of common lambsquarters extract concentrations was higher than that of cocklebur in both experiments. Germination percentage (GP) reduction under 25, 50, 75 and 100% concentrations of common lambsquarters was 57, 84, 96.7 and 100%, respectively. GP reduction under the same concentrations of cocklebur was 17, 20, 34 and 54%, respectively. In the pot culture conditions, the root dry weight of soybean decreased with increases in extract concentration, so that the highest root dry weight belonged to the control treatment with 64 mg and the lowest values belonged to the effect of aqueous extract of weed with a concentration of 100%. The results on the EWRC scale showed that the soybean leaflet damages increased as the extract concentrations increased. The highest leaf damages were obtained in 75 and 100% of cocklebur and Chenopodium concentrations. The negative impacts of common lambsquarters were higher than those of cocklebur. Conclusion: In general, the results of this study showed that the effects of different concentrations of the lambsquarters extract on germination and soybean growth of the Williams cultivar were higher under both Petri and pot conditions. The percentage of germination in the concentrations of 25, 50, 75 and 100% of the aqueous extract of cocklebur was 17%, 20%, 34% and 54%, respectively, and in lambsquarters, it decreased by 57%, 84%, 96% and 100%, respectively, compared to the control. On the other hand, spraying the extracts of lambsquarters and cocklebur caused necrosis and drying of soybean leaves. According to the result","PeriodicalId":14578,"journal":{"name":"Iranian Journal of Seed Research","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88785159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Chitosan Nano Particle and Potassium Nitrate on Germination and Some Morpho-physiological Characteristics of Seedlings of Quinoa (Chenopodium quinoa)","authors":"A. Mansouri, H. Omidi","doi":"10.29252/yujs.5.1.147","DOIUrl":"https://doi.org/10.29252/yujs.5.1.147","url":null,"abstract":"","PeriodicalId":14578,"journal":{"name":"Iranian Journal of Seed Research","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90071542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Magnetic Field on Seed Germination of Guizotia abyssinica under Drought Stress Conditions","authors":"S. Hosseini, Mohammad Rafieolhossaini, Partoo Roshandel","doi":"10.29252/YUJS.5.1.33","DOIUrl":"https://doi.org/10.29252/YUJS.5.1.33","url":null,"abstract":"","PeriodicalId":14578,"journal":{"name":"Iranian Journal of Seed Research","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91466832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Germination Characteristics and Seed Activity of Enzymes of Different Landraces of Indian Cheese Maker (Withania coagulans) in Response to Sodium Hypochlorite and Pre-chilling","authors":"M. Ghanbari, S. A. Modarres-Sanavy, A. Mokhtassi‐Bidgoli","doi":"10.29252/yujs.5.1.119","DOIUrl":"https://doi.org/10.29252/yujs.5.1.119","url":null,"abstract":"","PeriodicalId":14578,"journal":{"name":"Iranian Journal of Seed Research","volume":"80 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86938521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Methyl Jasmonate Pre-Treatment on Germination Indices and Biochemical Traits of Stevia Seedlings (Stevia rebuadiana) under Salt Stress","authors":"Elnaz Mohamadian, H. Kianmehr, Hojjat Ataei Somagh, Neda Azad Nafas Mahjor, F. Safari, Arezo Safarzadeh","doi":"10.29252/yujs.5.1.101","DOIUrl":"https://doi.org/10.29252/yujs.5.1.101","url":null,"abstract":"","PeriodicalId":14578,"journal":{"name":"Iranian Journal of Seed Research","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74616582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}