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پتانسیل مقاومت به استرس غرقابی در ژرم پلاسم گلابی وحشی (Pyrus boisseriana Buhse.) | ||
| نشریه جنگل و فرآورده های چوب | ||
| مقاله 2، دوره 67، شماره 4، اسفند 1393، صفحه 553-562 اصل مقاله (737.4 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/jfwp.2015.53075 | ||
| نویسندگان | ||
| علی ستاریان1؛ قاسم علی پاراد2؛ مهرداد زرافشار* 3؛ مسلم اکبری نیا4؛ سید فرید غفاری دهکردی5 | ||
| 1دانشیار گروه جنگل‌داری، دانشگاه گنبد کاووس، گنبد کاووس، ایران | ||
| 2دانشجوی دکتری جنگل‌داری، دانشکدة منابع طبیعی، دانشگاه تربیت مدرس، نور، ایران | ||
| 3دکتری جنگل‌داری، دانشکدة منابع طبیعی، دانشگاه تربیت مدرس، نور، ایران | ||
| 4دانشیار گروه جنگل‌داری، دانشکدة منابع طبیعی، دانشگاه تربیت مدرس، نور، ایران | ||
| 5کارشناس ارشد جنگل‌داری، دانشکدة منابع طبیعی، دانشگاه تربیت مدرس، نور، ایران | ||
| چکیده | ||
| ژرم‌پلاسم وحشی گونههای گیاهی به‌واسطة اکتساب سازگاری در سطح ژن تا خصوصیات ظاهری، سازگاری مقبولی به انواع تنشهای محیطی نشان میدهند که استفاده از آن‌ها در جنگلکاریها، کشاورزی، و باغداری مورد توجه قرار می‌گیرد. در این پژوهش، با تکیه بر مطالعة زندهمانی، رشد، زیستتوده، و تغییرات فیزیولوژیکی نهالهای گلابی وحشی، پتانسیل این گونه، به‌عنوان پایک در باغ‌هایی که به‌طور متناوب تحت تأثیر شرایط غرقابی قرار میگیرند، بررسی شد. بدین‌ترتیب نهالهای گلابی در طرحی کاملاً تصادفی و دو سطح غرقابی (15 روز غرقاب و به دنبال آن 15 روز زهکشی) و شاهد به مدت 30 روز بررسی شدند. نتایج نشان داد که غرقابی باعث کاهش زندهمانی و رویش قطری و ارتفاعی نهالها شده است. همچنین مشخص شد که غرقابی پس از 7 روز باعث کاهش شدید پارامترهای فیزیولوژیک از جمله هدایت روزنهای، فتوسنتز، و میزان تعرق شده است و این روند کاهشی تا 15 روز بعد از شرایط غرقاب ادامه داشت تا اینکه بعد از زهکشی، مشخصههای فیزیولوژی شروع به بازیابی کردند. همچنین غرقابی باعث کاهش زیستتودة قسمتهای گوناگون نهال شده است. ثبت مقادیر ناچیز پارامترهای فتوسنتز در روز پانزدهم از تنش، حاکی از آن است که ژرم‌پلاسم وحشی گلابی میتواند در باغ‌هایی که به‌طور متناوب 15 روز تحت شرایط غرقاب هستند مورد توجه قرار بگیرد. در صورت ادامة شرایط غرقاب بیش از 15 روز مرگ گیاه حتمی است. | ||
| کلیدواژه‌ها | ||
| رویش ارتفاعی؛ زندهمانی؛ زیستتوده؛ فتوسنتز؛ هدایت روزنهای | ||
| عنوان مقاله [English] | ||
| Potential of Tolerance in Germplasm of Wild Pear under Flooding Stress | ||
| نویسندگان [English] | ||
| ali Sattarian1؛ Ghasemali Parad2؛ Mehrdad Zarafshar3؛ Moslem Akbarinia4؛ seyed farid Ghafari5 | ||
| 1Associate Professor, Department of Forestry, Gonbad Kavoos University, Gonbad Kavoos, I.R. Iran | ||
| 2PhD Candidate, Faculty of Natural Resources, Tarbiat Modares University, Noor, I.R. Iran | ||
| 3PhD, Faculty of Natural Resources, Tarbiat Modares University Noor, I.R. Iran | ||
| 4Associate Professor, Faculty of Natural Resources, Tarbiat Modares University Noor, I.R. Iran | ||
| 5M.Sc, Faculty of Natural Resources, Tarbiat Modares University Noor, I.R. Iran | ||
| چکیده [English] | ||
| Wild plant germplasm possesses useful adaptive strategies. Wild plant species, for example, are resistant to biotic and abiotic stress and can be used for reforestation, agriculture, and horticulture. We surveyed the potential of wild pear to resist flooding. We looked at survival, growth, biomass, and several physiological variables. The rootstocks of wild pear are candidates for planting in orchards that experience periodic flooding. For this purpose, we conducted a completely randomized design with two flooding treatments: 1. 15 days flooding plus 15 days recovery and 2. control, for a 30 day experimental period. The results showed no discernible effects of flooding on survival, height, and diameter. Nevertheless, seven days of flooding had negative and extensive effects on photosynthesis, transpiration, and stomatal conductance. This trend continued until the fifteenth day. Photosynthesis, however, recovered 15 days after the flooding. In addition, plant biomass was negatively affected by flooding. Cessation of photosynthesis after 15 days of flooding proves that the wild pear can be used as rootstock in areas prone to flooding for up to 15 days. If the flooding continues, however, the plant will eventually die. | ||
| کلیدواژه‌ها [English] | ||
| Biomass, Height growth, photosynthesis, Stomatal conductance, Vitality | ||
| مراجع | ||
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