تأثیر تنش شوری روی برخی از ویژگی‌های کمی و کیفی ژنوتیپ‌های "برگ موجی" و "برگ صاف" آلترنانترا (Alternanthera repens)

نوع مقاله : مقاله علمی-پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد گروه علوم باغبانی، دانشکده کشاورزی، دانشگاه لرستان، خرم آباد، ایران

2 استادیار گروه علوم باغبانی، دانشکده کشاورزی، دانشگاه شهید چمران اهواز، اهواز، ایران

3 دانشیار گروه علوم باغبانی، دانشکده کشاورزی، دانشگاه لرستان، خرم آباد، ایران

چکیده

این پژوهش باهدف بررسی اثرات تنش شوری روی برخی از ویژگی‌های مرفولوژیکی، فیزیولوژیکی و بیوشیمیایی گیاه آلترنانترا به‌صورت گلخانه‌ای انجام شد. آزمایش به‌صورت فاکتوریل بر پایه طرح بلوک‌های کامل تصادفی در چهار تکرار انجام گرفت. گیاهان به‌روش تقسیم بوته ازدیاد و در شرایط هیدروپونیک کشت شدند. پس از استقرار گیاهان، تیمار شوری شامل چهار سطح صفر (شاهد)، 30، 60 و 90 میلی‌مولار کلریدسدیم به‌مدت 12 هفته بر روی دو ژنوتیپ "برگ موجی" و "برگ صاف" اعمال شد. نتایج نشان داد اثر ژنوتیپ و شوری بر تمام ویژگی‌ها معنی‌دار بود. در شوری 90 میلی‌مولار در مقایسه با شاهد طول گیاه در ژنوتیپ "برگ موجی" به 50 درصد و در ژنوتیپ "برگ صاف" به 28 درصد رسید. با افزایش تنش شوری وزن‌تر و خشک شاخساره و ریشه، محتوای نسبی آب برگ نیز کاهش نشان دادند. میزان پرولین، نشت الکترولیت و آنتوسیانین با افزایش تنش شوری افزایش پیدا کردند. در تیمار شوری 90 میلی‌مولار در مقایسه با شاهد در ژنوتیپ‌های "برگ موجی" و "برگ صاف" به‌ترتیب محتوای نسبی آب برگ 15/18 و 95/31 درصد کاهش، کلروفیل کل 5/57 و 5/78 درصد کاهش، نشت الکترولیت 5/407 و 4/670 درصد افزایش، پرولین 1/385 و 5/297 درصد افزایش و آنتوسیانین 4/382 و 8/177 درصد افزایش نشان دادند. براساس نتایج ژنوتیپ "برگ موجی" مقاوم‌تر بود و توانست تا شوری 90 میلی‌مولار را تحمل کند و به بقای خود ادامه دهد، درحالی‌که ژنوتیپ " برگ صاف" شوری‌ بیشتر از 60 میلی‌مولار را تحمل نکرد و گیاهان تیمار شده با شوری 90 میلی‌مولار در این ژنوتیپ دچار آسیب شدند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effects of Salinity Stress on some Quantitative and Qualitative Characteristics of Alternanthera repens Genotypes: "Entire Leaf "and "Undulate Leaf"

نویسندگان [English]

  • Daryoush Pourghasemi 1
  • Merangiz Chehrazi 2
  • Abdolhossein Rezaei Nejad 3
1 MSc Student, Department of Horticultural Sciences, Faculty of Agriculture, Lorestan University, Khoramabad, Iran
2 Assistant Professor, Department of Horticultural Sciences, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran
3 Associate Professor, Department of Horticultural Sciences, Faculty of Agriculture, Lorestan University, Khoramabad, Iran
چکیده [English]

In order to study the effect of salinity on some morphological, physiological and biochemical characteristics of Alternanthera repens, this project was carried out as a factorial experiment based on a randomized complete block design with four replications in a greenhouse. Two Alternanthera genotypes, "Undulate leaf" and "Entire leaf" were propagated through plant division, and grown hydroponically. After establishment of the plants, they were treated with 0 (control), 30, 60 and 90mM NaCl for 12 weeks. Results showed that effects of genotype and salinity were significant on all measured traits. Compared to the controls, plants height were reduced in plants grown under 90mM NaCl to 50 and 28 percent, in "Undulate leaf" and "Entire leaf", respectively. As salinity level increased, shoot fresh and dry weight and relative water content (RWC) decreased. Further, as salinity level increased, proline content, electrolyte leakage (EL) and anthocyanin content increased. Compared to the controls, plants grown under 90 mM NaCl showed 18.15 and 31.95 percent less RWC, 57.5 and 78.5 percent less chlorophyll, 407.5 and 670.4 percent more EL, and 382.4 and 177.8 more anthocyanin, in "Undulate leaf" and "Entire leaf", respectively. According to the results, "Undulate leaf" was more resistant to salinity compared to "Entire leaf". At 90 mM NaCl salinity, "Undulate leaf" could survive, while, "Entire leaf" was completely injured.

کلیدواژه‌ها [English]

  • NaCl
  • Anthocyanin
  • Proline
  • Relative water content
  • Chlorophyll

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دوفصلنامه فنآوری تولیدات گیاهی
دوره 10، شماره 1
خرداد 1397
صفحه 1-11

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