Foliar Application of Anti-frost Solution Influences Physiological and Biochemical Parameters in Bougainvillea, Canna and Petunia
محورهای موضوعی : مجله گیاهان زینتیSahar Mirzaei 1 , Morteza Khoshkhuy 2 , Behzad Edrisi 3
1 - Assistant Professor, Ornamental Plants Research Centre, Horticultural Science ResearchInstitute, Agricultural Research, Education and Extension Organization (AREEO), Mahallat, Iran.
2 - Professor, Department of Horticulture Science, Shiraz University, Iran.
3 - Ornamental Plants Research Center, Horticultural Sciences Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Mahallat, Iran
کلید واژه: Chlorophyll, Proline, Cold, Electrical Conductivity,
چکیده مقاله :
Frost is the coating or deposit of ice that may form in cold conditions, usually overnight. If the temperature drops far enough for the plant cells to freeze, non hardy plants will die. Therefore, a research was laid out to study the influence of an anti-frost solution on growth, flowers quality and biochemical parameters of ornamental plants. The anti-frost solution was applied as foliar sprays in different concentration of T0: 0 (mg L-1) (only water) as control, T1: 250 (mg L-1), T2: 500 (mg L-1), T3: 1000 (mg L-1), T4: 1500 (mg L-1), T5: 2000 (mg L-1) ‘ferti-fros’, on bougainvillea (Bougainvillea glabra(, canna (Canna indica) and petunia (Petunia axillaris). Results showed that flowering percentage and flowering duration in the treated plants was more than control. Highest flowering percentage and flowering duration was in T5 (81.22%) and (13.86 days), respectively. By increasing concentration of anti-frost solution, damaging percentage was decreased. Lowest damaging percentage was in T5 (69.77%). Total chlorophyll enhanced with increasing concentration of anti-frost solution. Highest amount of total chlorophyll belonged to T5 (50.80 mg g-1). By comparing effect of different treatments on amount of prolineit was shown that control had highest amount of proline (0.56 μM g-1). With increasing concentration of anti-frost, amount of proline was decreased T5 (0.08 μmol g-1).Electrical conductivity was affected by different treatments in all flowers. Highest amount of electrical conductivity recorded for control (9.0 mS g-1 cm-1) and lowest amount was in T5 (2.26 mS g-1 cm-1). Difference of all the treatments was significant at 0.1% level of significance.
یخ زدگی، لایهای یا رسوباتی از یخ میباشد که در شرایط سرما معمولا شب، شکل میگیرد. اگر دما به اندازهای پایین بیاید که سلولهای گیا ه یخ بزنند، گیاهان غیر چوبی میمیرند. بنابراین آزمایش تحقیقاتی طرح گردید تا اثرات محلولهای ضد سرما بر روی رشد، کیفیت گلدهی و پارامترهای بیوشیمیایی در گیاهان زینتی بررسی گردد. محلول ضد سرما در غلظتهای مختلف، (شاهد) T0: 0، T1: 250، T2: 500، T3: 1000، T4: 1500 و T5: 2500 میلیگرم در لیتر تهیه و بر روی اندامهای گل اختر (Canna Indica)، اطلسی (Petunia Axillaris) و کاغذی (Bougainvillea Glabra) محلول پاشی گردید. نتایج نشان داد که تعداد گلها و دوره گلدهی در گیاهان تیمار شده بیشتر از شاد بود. بیشتر تعداد گل و طول دوره گلدهی متعلق به تیمار T5، بهترتیب 22/81 درصد و 86/13 روز بود.با افزایش غلظت محلول ضد سرما، درصد گیاهان آسیب دیده کاهش یافت. کمترین میزان در تیمار T5 (77/69 درصد) مشاهد شد. با افزایش غلظت محلول ضد یخ، مقدار کلروفیل افزایش یافت. بیشترین مقدار کلروفیل در تیمار T5 (80/50 میلیگرم در هر گرم) مشاهده شد. با مقایسه اثرات تیمارهای مختلف مشاهده شد که شاهد دارای بالاترین میزان پرولین (56/0 میکرومول در هر گرم) و نشت یونی (9 میلیزیمنس در گرم در سانتیمتر) بود و با افزایش غلظت محلول ضد یخ، کاهش یافتند. کمترین میزان پرولین (08/0 میکرومول در گرم) و نشت یونی (26/2 میلیزیمنس در گرم در سانتیمتر) متعلق به تیمار T5 بود. تفاوت تیمارهای مختلف در سطح 1/0 درصد معنیدار بود.
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