بررسی اثرات کاربرد گاما آمینو بوتیریک اسید و لاکتات کلسیم بر فتوسنتز و تجمع نیترات در کاهو رقم ‏دیمایو

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار، دانشکده کشاورزی، دانشگاه شهید باهنر کرمان، کرمان، ایران

2 دانشجوی کارشناسی ارشد، دانشکده کشاورزی، دانشگاه شهید باهنر کرمان، کرمان، ایران

چکیده

جذب نیترات در گیاهان با توجه به نگرانی‌های زیست محیطی و کیفیت محصولات کشاورزی اهمیت بسیار زیادی دارد. از طرفی فتوسنتز به عنوان اصلی‌ترین شاخص رشد و عملکرد گیاهان مطرح بوده، بنابراین توانایی حفظ آن در شرایط مختلف محیطی برای ثبات عملکرد محصول مهم می‌باشد. در این مطالعه برخی از خصوصیات فیزیولوژیکی و میزان تجمع نیترات با استفاده از تیمار گاما آمینو بوتیریک اسید (گابا) و لاکتات کلسیم در کاهو رقم دیمایو مورد بررسی قرار گرفت. بدین منظور از محلول‌های گابا با غلظت‌های (صفر، نیم و یک و نیم میلی‌گرم بر لیتر) و لاکتات کلسیم با غلظت‌های (صفر، یک و دو درصد) و اثر متقابل آن‌ها، به صورت محلول‌پاشی برگی در طی دو مرحله پس از انتقال نشاء و دو هفته پس از آن استفاده شد. این آزمایش به صورت فاکتوریل در قالب طرح کاملا تصادفی در گلخانه انجام شد. تیمار گابای 5/1 میلی‌گرم بر لیتر + لاکتات کلسیم 2 درصد بیشترین میزان عملکرد، کلروفیل کل و محتوای آب نسبی را نشان داد، در حالی که بیشترین میزان نشت یون و تجمع نیترات در برگ گیاهان شاهد به دست آمد. هم‌چنین کمترین میزان تجمع نیترات در تیمار گابا با غلظت 5/1 میلی‌گرم بر لیتر اندازه‌گیری شد که مقدار تجمع نیترات را نسبت به گیاهان شاهد به میزان چهار برابر کاهش داد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effects of application of GABA and calcium lactate on photosynthesis and nitrate ‎accumulation in Lactuca sativa ‘Dimayo’ ‎

نویسندگان [English]

  • Najme Zeinalipour 1
  • Fatemeh Aghebati 2
1 Assistant Professor, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran
2 M. Sc. Student, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran
چکیده [English]

Nitrate uptake in plants is very important due to environmental concerns and the quality of agricultural products. On the other hand, photosynthetic efficiency is considered as the principal indicator of plant growth and yield, therefore the ability to sustain crop stability in different environmental conditions is crucial. In this study, some physiological characteristics and nitrate accumulation were investigated using γ-aminobutyric acid (GABA) and calcium lactate in lettuce of Dimayo cultivar. For this purpose, GABA solutions with three concentrations (0, 0.5 and 1.5 mg/l) and calcium lactate with three concentrations (0, 1 and 2 %) and their interaction were used, as foliar spraying during two times including after seedling transplant and two weeks later. This factorial experiment was performed in a completely randomized design in the greenhouse. GABA treatment of 1.5 mg/l + calcium lactate 2% showed the highest yield, total chlorophyll and relative water content. However, the highest ion leakage and nitrate accumulation were obtained in the leaves of control plants. Also, the lowest amount of nitrate accumulation was measured in GABA treatment with a concentration of 1.5 mg/l, which reduced the amount of nitrate accumulation compared to control plants by four times.  

کلیدواژه‌ها [English]

  • Chlorophyll
  • iceberg
  • ion leakage
  • relative water content‎

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علوم باغبانی ایران
دوره 53، شماره 4
دی 1401
صفحه 957-966

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سابقه مقاله

  • تاریخ دریافت: 11 بهمن 1400
  • تاریخ بازنگری: 19 مرداد 1401
  • تاریخ پذیرش: 09 شهریور 1401

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