بررسی تأثیر قارچ‌های مایکوریزی بر نهال‏های سنجد (‏Elaeagnus angustifolia L.‎‏) تحت تنش آبی

نوع مقاله : علمی - پژوهشی

نویسندگان

1 دکتری جنگل‏شناسی و اکولوژی جنگل، دانشکده منابع طبیعی دانشگاه علوم کشاورزی و منابع طبیعی ساری، ایران‏

2 دانشیار، گروه جنگلداری، دانشکده منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران‏

3 دانشیار، موسسه تحقیقات خاک و آب، سازمان تحقیقات، آموزش و ترویج کشاورزی، کرج، ایران‏

4 استادیار پژوهش، مرکز تحقیقات کشاورزی و منابع طبیعی، سازمان تحقیقات، آموزش و ترویج کشاورزی‎ ‎اصفهان، ایران‏

5 دکتری علوم مرتع، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی، سازمان تحقیقات، آموزش و ترویح کشاورزی، اصفهان، ایران

چکیده

این پژوهش به‌صورت فاکتوریل در قالب طرح بلوک­های کامل تصادفی با دو عامل: 1- تلقیح با قارچ‏های آربسکولار مایکوریزا در سه سطح Rhizophagus irregularis، Funneliformis mosseae و شاهد (بدون تلقیح) و 2- تنش خشکی در چهار سطح 100 (شاهد)، 75، 50 و 25 درصد ظرفیت زراعی (FC) در چهار تکرار در گلخانه­ انجام شد. صفات مورفولوژیکی نهال‌های سنجد Elaeagnus angustifolia L. (ارتفاع، قطر یقه و غیره) در ابتدا و انتهای دوره آزمایش اندازه‌گیری شد. نتایج نشان داد با افزایش تنش آبی صفات رویشی مانند ارتفاع، قطر یقه، تعداد شاخه و برگ، وزن خشک ریشه و اندام هوایی نهال‏های سنجد به‌طور معنی‏دار کاهش یافت. طول ریشه اصلی نهال‏ها با افزایش تنش خشکی تا FC 50 درصد روند افزایشی نشان داد که نشان‌دهنده افزایش طول ریشه در شرایط تنش آبی بود. متوسط طول ریشه نهال‏های سنجد در گونه‏های قارچی F. mosseaeو R. irregularisبه­ترتیب 46 و 38 سانتی‌متر بود. کاربرد میکوریز به‌طور قابل­ملاحظه‏ای رشد رویشی و صفات مورفولوژیکی نهال‏ها را در شرایط تنش خشکی افزایش داد، گونه قارچی F. mosseae در تمامی صفات مورفولوژیک غیر از وزن خشک ریشه شرایط مطلوب‏تری نسبت به گونه قارچی R. irregularis برای نهال‏های یک‏ساله سنجد ایجاد کرد.

کلیدواژه‌ها


عنوان مقاله [English]

Investigation of the effect of mycorrhizal fungi on seedlings Elaeagnus angustifolia L. under drought stress under controlled conditions

نویسندگان [English]

  • Bahman Zamani kebrabadi 1
  • Seyed Mohammad Hojjati 2
  • Farhad Rejali 3
  • Masoud Esmaeili Sharif 4
  • Razieh Saboohi 5
1 Ph.D of Silviculture and Forest Ecology, Sari Agricultural Sciences and Natural Resources University, Sari, ‎I. R. Iran‎
2 Associate Professor, Department of Forestry, Faculty of Natural Resources, Sari Agricultural Sciences and ‎Natural Resource University, Sari, I. R. Iran‎
3 Associate Professor, Soil and Water Research Institute, Agricultural, Research, Education and Extension ‎Organization, Karaj, I. R. Iran‎
4 Assistant professor, Division of Natural Resources, Isfahan Agricultural and Natural Resources, ‎Agricultural, Research, Education and Extension Organization, Isfahan, I. R. Iran‎
5 PhD of Range Management, Isfahan Agriculture and Natural Resources Research and Education Center, ‎AREEO, Isfahan, I. R. Iran‎
چکیده [English]

Russian olive seedlings were planted in environmental plan in the form of Complete Randomized Block Design (RCBD) with four replications and treat mental plan in the form of factorial with 2 factors in the greenhouse. The test factors were Arbuscular mycorrhizal inoculum (Rhizophagus irregularis, Funneliformis mosseae and control without inoculation) and four drought stress intensity (25, 50, 75 and 100% of field capacity (FC)). Seedlings growth rate include height, collar diameter, number of leaves, number of branches, weight of aerial and underground organs were calculated by comparison of the growth rate at the beginning and end of the experimental period. With increasing drought stress intensity, vegetative traits such as height, collar diameter, number of branches and leaves, root dry weight and shoot dry weight of Russian olive seedlings were decreased significantly. With increasing drought stress to 50% of FC, the main root length of seedlings showed an increasing trend, indicating an increase in root length under dehydration. The average root length of Russian olive seedlings in F. mosseae and R. irregularis were 46 and 38 cm, respectively. Application of mycorrhiza significantly increased vegetative growth and morphological traits of seedlings under drought stress. F. mosseae in all morphological traits except root dry weight was more favorable than R. irregularis for one-year-old Russian olive seedlings‎.

کلیدواژه‌ها [English]

  • Shoot weight
  • collar diameter
  • Colonization
  • Seedling height
  • Root weight
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