بهبود تحمل به شوری در خیار به وسیله پیوند بر روی پایه کدو

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه علوم باغبانی، دانشکده کشاورزی، دانشگاه تبریز

2 گروه علوم خاک، دانشکده کشاورزی، دانشگاه تبریز

چکیده

یکی از مشکلات تولید خیار در کشور، تنش ناشی از شوری گسترده در خاک و آب است. استفاده از پایه­های کدو یک راه­حل موثر در افزایش تحمل به شوری در خیار است. به منظور بررسی اثر پیوند روی پایه­های شینتوزا، کبالت و روت­پاور در شرایط شوری 40، 60 و 80 میلی­مولار حاصل از نمک NaCl بر عملکرد، رشد، کیفیت میوه، نشت یونی، سطح برگ، سطح ویژه برگ، شاخص SPAD، مقدار آب نسبی برگ و برخی ترکیبات معدنی و پرولین در خیار رقم خسیب، یک آزمایش به صورت فاکتوریل در قالب طرح پایه کاملاً تصادفی (CRD) با 3 تکرار انجام گرفت. شوری با افزایش ماده خشک و مواد جامد محلول باعث بهبود کیفیت میوه گیاهان پیوندی و غیرپیوندی شد. درصد کاهش عملکرد و زیست­توده در هر سه تیمار شوری به طور معنی­داری در گیاهان پیوندی نسبت به گیاهان غیر پیوندی پایین­تر بود. گیاهان پیوندی تحت تنش دارای عملکرد میوه، رشد، سطح برگ، مقدار آب نسبی برگ، محتوای کلروفیل (شاخص SPAD) بیشتر، وضعیت تغذیه­ای بهتر در بافت ریشه و برگ، غلظت پرولین بالاتر و نشت الکترولیت کمتر در مقایسه با گیاهان غیر پیوندی بودند. این نتایج نشان داد که پایه­ها ظرفیت بالایی برای دفع و نگهداری سدیم داشته و در نتیجه باعث کاهش انتقال سدیم به ساقه و افزایش تحمل به شوری در خیار می­شوند.
 

کلیدواژه‌ها


عنوان مقاله [English]

Improving Cucumber Salt Tolerance by Grafting on Cucurbit Rootstock

نویسندگان [English]

  • Esmaeil Madadkhah 1
  • Sahebali Bolandnazar 1
  • Shahin Oustan 2
چکیده [English]

Soil and water salinity is one of the stresses that have limited cucumber production in Iran. The use of cucurbit rootstocks is a valid strategy in increasing cucumber salt tolerance. In order to investigate the effect of the grafting on Shintoza, Cobalt, and Root power rootstocks in salinity condition (40, 60 and 80 mM NaCl) on yield, growth, fruit quality, electrolyte leakage, leaf area, specific leaf area (SLA), SPAD index, leaf relative water content (LRWC), mineral composition, and proline of cucumber plants (cv. Khasib), an factorial experiment was carried out based on completely randomized design (CRD) with three replications. Salinity improved fruit quality in both grafted and ungrafted plants by increasing fruit dry matter and total soluble solids content. Moreover, at the three salt treatments the percentage of yield and biomass reduction was significantly lower in the grafted plants in comparison to ungrafted plants. Grafted cucumber plants exposed to NaCl were capable of maintaining higher fruit yield, plant growth, leaf area, leaf relative water content (LRWC), higher chlorophyll content (SPAD index), a better nutritional status in the root and leaf tissues and higher proline concentration and less electrolytic leakage in comparison with ungrafted ones. These results suggest that rootstocks have a higher capacity for Na+ exclusion and retention, which resulted in reduced Na+ transport to the shoot and increased the salt tolerance of cucumber.
 

کلیدواژه‌ها [English]

  • Cucumber
  • Grafting
  • Growth Indices
  • Salinity stress
  • Salt Tolerance
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