بررسی اثر روش های مختلف کاشت و سطوح مختلف توزیع هورمون ها بر صفات زایشی ژنوتیپ های برنج تحت تنش شوری در شمال خوزستان

نوع مقاله : مقاله پژوهشی

نویسندگان

1 محقق دوره پسادکتری، گروه مهندسی تولید و ژنتیک گیاهی، دانشکده کشاورزی، دانشگاه علوم کشاورزی و منابع طبیعی خوزستان، ایران.

2 استاد، گروه مهندسی تولید و ژنتیک گیاهی، دانشکده کشاورزی، دانشگاه علوم کشاورزی و منابع طبیعی خوزستان، ایران.

چکیده

این پژوهش به صورت کرت‌های دو بار خردشده در قالب طرح بلوک‌های کامل تصادفی با سه تکرار در استان خوزستان با هدف تعیین بهترین روش کشت برنج در دو سال (1397 و 1398) انجام شد. سه شیوه کاشت (خشکه‌کاری، نشایی و مستقیم یا رایج منطقه)، 16 سطح مختلف هورمون‌های اکسین و سالسیلیک اسید به صورت پرایمینگ بذری و تیمارهای مختلف اسپری برگی با مقدار 1 و 2 لیتر در هکتار و زمان‌های اسپری مختلف در مراحل پنجه‌زنی و ظهور خوشه بر ژینوتیپ‌های مختلف برنج مورد بررسی قرار گرفت.
یافته‌ها: نتایج تچزیه مرکب نشان داد بین اثرات اصلی و متقابل صفات تفاوت معنی‌داری در سطح احتمال یک درصد وجود دارد. عملکرد دانه و اجزای عملکرد به همراه کلیه صفات رویشی و زایشی (وزن پانیکول، وزن هزاردانه، تعداد دانه پر و پوک در پانیکول) که می‌توانند از طریق فتوسنتز جاری یا انتقال مجدد باعث افزایش عملکرد دانه گردند بیشترین مقدار خود را در روش کشت نشایی به دلیل ایجاد شرایط بهینه و مطلوب رشد در راستای تنش‌‌زدایی دارا بودند. در بین تیمارهای هورمونی بیشترین مقدار عملکرد دانه و اجزای عملکرد در پرایمینگ تلفیقی بذر با هر دو هورمون رشدی اکسین و سالیسیلیک اسید به دلیل مکمل هم بودن دو هورمون رشدی در تنظیم واکنش‌های بیوشیمیایی و مرفولوژیکی گیاه که هرچه زمان استفاده از این هورمون‌ها زودتر باشد به لحاظ زمان‌بر بودن، تأثیر سازگاری به مراتب بیشتری داشتند که در روش پرایمینگ به دلیل ایجاد مقاومت و تسریع در رشد، مشاهده شدند.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Evaluation of different planting methods and different Hormones concentrations on Reproductive traits of Genotype rice in under Salt Stress North Khuzestan region

نویسندگان [English]

  • Kaveh Limouchi 1
  • sayed ataolah siadat 2
1 Postdoctoral researcher, Department of Plant Production and Genetic, College of Agriculture, Agricultural Sciences and Natural Resources University of Khuzestan, Iran.
2 Professor, Department of Plant Production and Genetic, College of Agriculture, Agricultural Sciences and Natural Resources University of Khuzestan, Iran.
چکیده [English]

This study was performed by split-split plots using randomized complete block design with three replications in Khuzestan province with the aim of determining the best method of rice cultivation in two years (2018 and 2019). Three planting methods (planting drying, planting seedlings, planting direct or common), 16 different levels of auxin and salicylic acid hormones in the form of seed priming and different leaf spray treatments with 1 and 2 liters per hectare and different spraying times in the tillering stages and the appearance of panicle on different rice genotypes were investigated.
Results: The combined analysis results showed that in addition to the interaction effect of planting method in hormone traits, there is a significant difference in the level of probability of one percent. grain yield and yield components along with all vegetative and reproductive traits (Panicle weight, 1000-grain weight, grain and floret in the panicle) that can increase grain yield through current photosynthesis or remobilization had their highest value in the transplanting method due to the creation of optimal growth conditions for stress relief. Among the combined hormonal priming treatments of seeds with both growth hormones auxin and salicylic acid, the highest amount of grain yield and yield components was observed due to the complementarity of the two growth hormones in regulating biochemical and morphological reactions of the plant. Time-consuming effects are much more compatible, and we were in the priming method because of creating resistance and accelerating growth.

کلیدواژه‌ها [English]

  • rice
  • Genotype
  • Planting methods
  • hormone
  • Reproductive
  • Panicle
  • grain
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