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مطالعه جوانهزنی و رشد گیاهچه بالنگو ((Benth.) Benth.in Wall Lallemantia royleana) در پاسخ به دما و تعیین دمای کاردینال جوانهزنی با استفاده از مدل‌های رگرسیونی غیرخطی | ||
| علوم و فناوری بذر ایران | ||
| مقاله 15، دوره 7، شماره 2 - شماره پیاپی 14، بهمن 1397، صفحه 205-218 اصل مقاله (817.66 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22034/ijsst.2019.110945.1102 | ||
| نویسندگان | ||
| محمدشاهین دانشمندی* 1؛ رضا توکل افشاری2؛ رضا صدرآبادی حقیقی3 | ||
| 1مربی، دانشکده کشاورزی و منابع طبیعی دانشگاه تربت حیدریه | ||
| 2استاد. گروه زراعت و اصلاح نباتات دانشکده کشاورزی دانشگاه فردوسی مشهد | ||
| 3استاد گروه زراعت دانشگاه ازاد اسلامی واحد مشهد | ||
| چکیده | ||
| در این پژوهش خصوصیات بیولوژیک بذر گیاه دارویی بالنگو در واکنش به دما ارزیابی شد. برای کمی‌سازی جوانهزنی و تعیین دمای کاردینال از چهار مدل رگرسیونی دندان مانند، دوتکه‌ای، مدل بتا و چند جمله‌ای درجه‌دوم و برای توصیف تابع برتر از ضرایب رگرسیونی (a و b)، ضریب تبیین چندگانه (R2)، ضریب همبستگی (r) و سطح معنی‌داری توابع بین زمان(ساعت) جوانهزنی مشاهده شده و زمان(ساعت) جوانهزنی پیش بینی شده استفاده شد. نتایج نشان داد جوانهزنی بالنگو در دامنه دمایی 5 تا 25 درجه سانتی‌گراد امکانپذیر است. بالاترین درصد جوانهزنی در شرایط آزمایشگاه در دمای 20 درجه به وقوع پیوست (5/98 درصد). بیشترین رشد گیاهچه و کمترین زمان تا ظهور ساقه‌چه نیز در همین دما رخ داد (به ترتیب 03/60 میلی متر و 58 ساعت). بر‌اساس نتایج برازش مدل‌های رگرسیونی غیرخطی، واکنش جوانهزنی نسبت به دما توسط مدل دو تکه‌ای بهتر از سه مدل دیگر توصیف شد، لذا برای کمّی سازی پارمترهای بیولوژیک و ظهور گیاهچه بالنگو می‌توان از این تابع استفاده کرد. با استفاده از این مدل، دمای کمینه، بهینه و دمای بیشینه جوانهزنی بذر بالنگو به ترتیب در دمای 1، 6/22 و 30 درجه سانتی‌گراد تعیین گردید. دستاوردهای این پژوهش نشان داد بالنگو یک گیاه سرما پسند بوده و جوانهزنی آن در دامنه دمایی 20 تا 6/22 درجه سانتی گراد نتایج مطلوب را در پی خواهد داشت. در این پژوهش معادلاتی جهت بررسی همزمان جوانهزنی بذر و رشد گیاهچه در واحد زمان ارائه شد که با عنوان «ارزش جوانهزنی (GV)» معرفی گردید. | ||
| کلیدواژه‌ها | ||
| ارزش جوانهزنی؛ کمی سازی جوانهزنی؛ مدل دوتکه‌ای | ||
| عنوان مقاله [English] | ||
| The Study of Seed Germination and Seedling Growth of Balangu (Lallemantia royleana (Benth.) Benth.in Wall) in Response to Temperature and Quantification of Cardinal Temperatures Using Nonlinear Regression Models | ||
| نویسندگان [English] | ||
| Reza Tavakkol afshari2؛ REZA SADRABADI HAGHIGHI3؛ | ||
| 2Department of Agronomy and Plant Breeding, Faculty of Agricultural, Ferdowsi ‎University of Mashhad, Mashhad, Iran‎ | ||
| 3Department of Agronomy and Plant Breeding, Mashhad Branch, Islamic Azad University, ‎Mashhad, Iran | ||
| چکیده [English] | ||
| In this research, biological characteristics of Balangu seed in response to temperature were evaluated. Germination responses and cardinal temperatures were evaluated using dent-like, segmented, beta and quadratic regression models and regression coefficients (a and b), correlation of determinant (R2), correlation coefficient (r), and significant level functions of predicted values versus observed ones were used to find the appropriate models. The results showed that the germination of Balangu is possible at a range of 5 to 25 °C. The highest germination percentage was detected at 20°C (98.5%). Moreover, at 20°C temperature the highest seedling growth and less time to shoot emergence (60.03 mm and 58 h respectively) was detected. Segmented model was superior compared to other models, therefore, this model is recommended for quantifying biological parameters and seedling emergence of Balangu. Temperatures of 1°C, 22.6°C and 30°C were the cardinal temperatures for seed germination (minimum, optimum and maximum, respectively). According to the results of this research, Balangu is the psychrophile plants and appropriate temperature germination is 20°C to 22.6°C. In this research, a proposed equation entitled of "Germination Value (GV)" for the simultaneous evaluation of seed germination and seedling growth per unit of time was introduced. | ||
| کلیدواژه‌ها [English] | ||
| Germination Value, Quantifying Germination, Segmented Models | ||
| مراجع | ||
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