واكنش گیاه دارویی بادرشبي (Dracocephalum moldavica) به سطوح شوري ناشي از كلريدسديم در مرحله جوانه¬زني و گياهچه
محورهای موضوعی : توليد محصولات زراعي
علیرضا پیرزاد
1
(دانشیار گروه زراعت و اصلاح نباتات دانشگاه ارومیه، ارومیه، ایران)
رضا درویش زاده
2
(دانشگاه ارومیه)
رئوف سیدشریفی
3
(دانشکده کشاورزی دانشکاه محق اردبیلی)
محمد صدقی
4
(دانشگاه محقق اردبیلی)
کلید واژه: بادرشبي, جوانه¬زني, شوري, كلريدسديم, گياهچه,
چکیده مقاله :
به منظور مطالعه جوانه¬زني و رشد گياهچه در مرحله هتروتروف در گياه بادرشبي، آزمايشي به صورت كرتهاي كاملا تصادفي در 4 تكرار و در سطوح شوري 0 ، 4 ، 8 ، 12 ، 16 و 20 دسي¬زيمنس بر متر کلریدسدیم اجرا گرديد. در اين مطالعه اثر كلريدسديم بر درصدجوانه¬زني، سرعت جوانه¬زني و درصد كاهش جوانه¬زني در بادرشبي غيرمعني¬دار و بر شاخص جوانه¬زني، زمان تا 50درصد جوانه¬زني، طول¬ساقه¬چه، طول ريشه¬چه، نسبت طول ساقه¬چه به ريشه¬چه، وزن تر و خشك گياهچه معني¬دار شد. بیشترین (1/33) و کمترین (9/20) شاخص جوانه¬زنی و کمترین (54 ساعت) و بیشترین (122ساعت) زمان جوانه¬زنی 50درصد بذور به ترتيب مربوط به شوری¬هاي 4 و 20 دسی¬زیمنس برمتر بود. طویل¬ترین ساقه-چه (91/3سانتی¬متر) و ریشه¬چه (97/1سانتی¬متر) از تیمار شاهد و کمترین طول ساقه¬چه (11/1سانتی¬متر) و ریشه¬چه (46/0سانتی¬متر) از شوری 20 دسی¬زیمنس برمتر حاصل شد كه اين تفاوت در روند تغییرات طول، منجر به حداکثر و حداقل نسبت طول ساقه¬چه به ریشه¬چه به¬ترتيب در شوري¬هاي 4 و 16 دسی¬زیمنس برمتر شد. بیشترین وزن¬تر (7/95میلی-گرم) و خشک (68/7میلی¬گرم) گیاهچه از شوری 4 و كمترين وزن¬تر (5/64میلی¬گرم) و خشک (73/5میلی¬گرم) گیاهچه از 20 دسی¬زیمنس برمتر به¬دست آمد.
To study the germination and plantlet growth in heterotrophic stage of balm mint, an experiment was carried out in complete random plots in four replications 0, 4, 12, 16 and 20 DC Siemens on sodium chloride. In this study the impact of sodium chloride on the percentage and speed of germination , and the percentage of the reduction of germination in balm mint was not meaningful, but it was significant for the index of germination, time to %50 germination, the length of stalk and rootlet to the length of the stalk and rootlet and the dry and wet weight of plantlet. The highest ( 122 hours ) time of germination, 50 percent of the seeds related to the salinity of 4 and 20 DC Siemens to meter respectively. The longest stalklet (3.91cm ) and rootlet ( 1.97cm ) were obtained from control treatment and the lowest stalklet length ( 1.11cm ) and rootlet (0.46cm ) of 20 DC Siemens to meter. This difference in the process of length changes, led to the maximum and minimum ratio of stalklet length to rootlet respectively in the salinity of 4 and 16 DC Siemens to meter. The highest wet weight ( 95.7 mg ) and dry ( 7.68 mg ) of the plantlet were obtained from salinity of 4 and lowest wet weight ( 64.5 mg ) and dry ( 5.73 mg ) of the plantlet were 20 DC Siemens to meter.
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