اثر سالیسیلیک اسید بر برخی صفات مورفولوژیک و زراعی گوار (.Cyamopsis tetragonoloba L) تحت تنش خشکی

نوع مقاله: علمی پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، گروه زراعت و اصلاح نباتات، دانشکده کشاورزی، دانشگاه شهید باهنر کرمان، کرمان، ایران

2 استادیار گروه زراعت و اصلاح نباتات، دانشکده کشاورزی، دانشگاه شهید باهنر کرمان، کرمان، ایران

چکیده

گوار گیاهی گرمسیری و متحمل به شوری و خشکی است. به­منظور بررسی اثر سالیسیلیک اسید بر صفات مورفولوژیک و زراعی آن در دورهای مختلف آبیاری، آزمایشی در قالب کرت­های خرد شده بر پایه طرح بلوک­ های کامل تصادفی با چهار تکرار در شهرستان قلعه گنج استان کرمان در سال زراعی 1396 اجرا شد. فواصل آبیاری شامل 6، 9 و 12 روز در کرت­های اصلی و سطوح سالیسیلیک اسید شامل صفر، 0.5، 1 و 2 میلی­مولار در کرت­ هاى فرعی قرار گرفتند. محلول­ پاشی سالیسیلیک اسید در سه مرحله پنج برگی، گلدهی و غلاف ­دهی گیاهان انجام گرفت. نتایج نشان داد که تنش خشکی باعث کاهش معنی ­دار صفات شاخص سطح برگ، تعداد غلاف در بوته و تعداد دانه در غلاف شد. محلول ­پاشی سالیسیلیک اسید موجب افزایش معنی ­دار کلیه صفات مورد بررسی گردید. به ­طوری که، بیشترین تعداد غلاف در بوته و تعداد دانه در غلاف در غلظت 2 میلی ­مولار و بیشترین شاخص سطح برگ در غلظت 1 میلی­ مولار سالیسیلیک اسید به ­دست آمدند. اثرات متقابل دورهای آبیاری و سالیسیلیک اسید بر وزن هزار دانه، پروتئین دانه و عملکرد دانه در هکتار در سطح احتمال یک درصد معنی ­دار شدند. نتایج نشان داد بیشترین عملکرد دانه (1245.25 کیلوگرم در هکتار) مربوط به تیمار غلظت سالیسیلیک اسید 1 میلی ­مولار و دور آبیاری 6 روز بود. با توجه به نتایج این تحقیق، محلول ­پاشی سالیسیلیک اسید 1 میلی ­مولار به ­منظور افزایش مقاومت گیاه گوار و کاهش افت عملکرد دانه به هنگام وقوع تنش خشکی مناسب به نظر می­ رسد.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of Salicylic Acid on Morpho-agronomical Traits of Guar (Cyamopsis tetragonoloba L.) under Drought Stress

نویسندگان [English]

  • Faramarz Chamani 1
  • Enayatollah Tohidinejad 2
  • Mehdi Mohayeji 2
1 M.Sc. Student, Department of Agronomy and Plant Breeding, Shahid Bahonar University of Kerman, Kerman, Iran
2 Department of Agronomy and Plant Breeding, Faculty of Agriculture, Shahid Bahonar University of Kerman
چکیده [English]

Guar is a tropical, salt and drought tolerant plant. To assess the effect of salicylic acid on its morphological and agronomical traits under different irrigation intervals, a split plot experiment based on randomized complete block design with four replicates was performed in Galeh-Gang region in Kerman province, Iran. Three different irrigations with 6, 9 and 12 day intervals, assigned to main plots and four salicylic acid concentrations (0, 0.5, 1 and 2 mM) to sub plots. Salicylic acid spraying was done three times at five leaf, flowering and podding stages. The results indicated that most of the morphologic and agronomic characters of guar were influenced under different irrigation intervals. Leaf area index, number of pods per plants and number of seeds per pod were decreased when drought stress occured. Spraying plants with salicylic acid increased almost all characters under study. While, the highest number of pods per plant, seeds per pod were obtained at 2 mM and leaf area index at 1 mM salicylic acid treatments. Irrigation interval by salicylic acid interaction was significant for specific leaf area, 1000 seed weight, seed protein content and seed yield. The highest seed yield (1245.25 kg.ha-1) was belonged to the irrigation of 6 day interval and 1 mM acid salicylic treatment. As a whole it can be concluded that use of 1 mM salicylic acid treatment might increase drought tolerance of guar and prevent yield reduction during drought stress.

کلیدواژه‌ها [English]

  • grain protein
  • leaf area index
  • Number of pod per plants
  • Number of seeds per pod
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