Browsing by Author "Demir, I."

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Effect of Smoke-Derived Butenolide Priming Treatment on Pepper and Salvia Seeds in Relation To Transplant Quality and Catalase Activity
(Elsevier, 2012) Demir, I.; Ozuaydin, I.; Yasar, F.; Van Staden, J.
A smoke-derived butenolide, 3-methyl-2H-furo[2,3-c]pyran-2-one, has previously been shown to improve seedling vigour of various crop species. The aim of this study was to examine the effect of butenolide priming treatments on seedling emergence and growth when it is applied to peat moss in which seeds are sown (post-sowing) rather than pre-sowing imbibition of the seed itself. Pepper (Capsicum annum L.) and salvia (Salvia sp.) seeds were sown in peat moss in modules and subjected to either butenolide priming (10(-7) M, 25 degrees C) or water for 24 h at 25 degrees C in the dark. Following this technique, seeds are imbibed, not subsequently dried and placed in a growth cabinet at 18 degrees C for germination. Butenolide-primed seeds emerged faster (lower MGT) and produced larger seedlings as indicated by fresh and dry weight compared to the water controls for both species. Butenolide-primed seeds had higher catalase activity than that of the controls suggesting that the enhancement obtained from priming may be due to changes in enzymatic activity. Butenolide priming may be used to enhance pepper and salvia seedling performance via the sowing medium. (C) 2011 SAAB. Published by Elsevier B.V. All rights reserved.
Positive Effect of Smoke-Derived Butenolide Priming on Melon Seedling Emergence and Growth
(Taylor & Francis Ltd, 2010) Mavi, K.; Light, M. E.; Demir, I.; van Staden, J.; Yasar, F.
A smoke-derived butenolide, 3-methyl-2H-furo[2,3-c]pyran-2-one, has previously been shown to improve seedling vigour. The aim of this study is to examine the effect of hydropriming and butenolide priming treatments on seedling emergence and growth under different sowing depths at 20 and 25 degrees C in two melon (Cucumis melo L.) seed lots of high and low quality. Seeds are subjected to hydropriming (21 h at 25 degrees C) and butenolide priming (10(-7) M, 21 h at 25 degrees C) and sown at a depth of 4 or 8 cm in peat moss (field capacity, 64% water by mass). In general, seedlings from butenolide-primed and hydroprimed seeds are superior to those of the control. At 20 degrees C, the effect of butenolide priming is more pronounced than that of hydropriming and the control, particularly for the seeds sown at a depth of 8 cm. Butenolide priming has a 'repair-inducing' effect and enhances the low-quality seeds more than those of the high-quality seed lot, an effect which is more obvious at 20 degrees C than 25 degrees C. It can be concluded that butenolide priming may be a useful tool to enhance melon seedling performance under low temperature sowing conditions.