اثر تنش شوری بر جوانه زنی بذر، رشد اولیه گیاهک و ساختار تشریحی اندام‌های رویشی چغندرقند

نویسندگان

1 گروه زیست شناسی، دانشکده علوم، دانشگاه ارومیه، ارومیه، ایران

2 گروه گیاهان دارویی، موسسه تحقیقات جنگل ها و مراتع، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران

چکیده
چغندرقند از تیره تاج خروسیان دارای نیاکان شورپسند است. در این تحقیق، اثر غلظتهای مختلف کلرید سدیم در مرحله جوانه زنی بذر گیاه چغندرقند و ساختار تشریحی گیاه بررسی شد. نتایج نشان داد که تنش شوری، جوانه زنی بذر و رشد اولیه گیاهچه چغندر قند را کاهش داد و باعث ایجاد تغییراتی در ساختارتشریحی گیاه مانند افزایش سنتز کوتین روی سلول‌های اپیدرمی برگ شد و همچنین تغییراتی در ضخامت سیستم آوندی، اپیدرم، پارانشیم برگ ­ها، ریشه­ ها و دمبرگ شد.



واژه

کلیدواژه‌ها


عنوان مقاله English

The effect of salinity on seed germination, early seedling growth and anatomical structure of Beta vulgaris

نویسندگان English

Fatemeh Nejadhabibvash 1
Mohammad Bagher Rezaee 2
1 Department of Biology, Faculty of Science, Urmia University, Urmia, Iran
2 Department of Medicinal Plants, Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization, Tehran, Iran
چکیده English

Beta vulgaris belongs to the family Amaranthaceae and was found to have halophytic ancestors. The objective of this study was to investigate the effect of sodium chloride on seed germination, therefore the early stages of seedling growth of Beta vulgaris grown under different salinity levels (0, 100, 150 and 200 mM of NaCl) were studied. The experiment was laid out in a completely randomized design (CRD) with four replications. It was revealed that as concentration of NaCl increases, the rate and percentage of germination, length and fresh weight of radicle & plumule and seedling vigour index decrease. In conclusion, our results indicated that salt stress decreased Beta vulgaris seed germination and early seedling growth while induced changes in the anatomical characteristics such as increased level of cutin synthesis on epidermal leaves cells and altered the thickness of vascular system, epidermis and parenchyma in leaves, roots and petioles.






کلیدواژه‌ها English

Salinity
seedling
radicle length
phloem
xylem
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  • تاریخ دریافت 18 خرداد 1405
  • تاریخ انتشار 18 خرداد 1405