Publication: Seed germination behaviour of Diplotaxis tenuifolia
Abstract
Ozellikle Kuzey Akdeniz havzasinda yayilis gösteren Diplotaxis cinsine ait 20'den fazla tur vardir. Diplotaxis tenuifolia (yabani roka) özellikle Italyan ve Fransiz mutfaginda çokça kullanimaktadir. Ayrica tarih boyunca çesitli hastaliklar için tibbi kullanimi da kaydedilmistir. Bu çalismada D. tenuifolia'nin çimlenme davranislari incelenmistir. Tohumlar pH ve tuz stresine karsi çok hassastir. Gün isigi kosullarinda tohum çimlenmesi %80'leri asmakla birlikte karanlikta ve sürekli isik altinda çimlendirilen tohumlarda çimlenme verimi düsmektedir. Çimlenmeden bir veya iki hafta sonra +4°C'de korunan tohumlarda farkedilir derecede çimlenmenin arttigi (%60) kaydedilmistir. Islatma ve kurutma islemi yapilan tohumlarda da uzun süre bekletilen tohumlara göre %28'lik bir artiþ sözkonusudur. Bu bulgular da göstermektedir ki, D. tenuifolia için tohum bankasi olusturmada depolama kosullari çok önem tasimaktadir.
Genus Diplotaxis is represented by more than 20 species mainly distributed in the North Mediterranean. Out of these Diplotaxis tenuifolia (wild rocket) is used widely in Italian and French cuisine. It has also been used for medicinal purpose for different illnesses throughout the history. In this study the germination behaviour of the seeds of D. tenuifolia was investigated. The seeds were very sensitive to pH and salinity stress. The seed germination increased under daylight conditions reaching a level of 80 percent but decreased in dark and continuous light. A remarkable increase was recorded (60%) in the germination of seeds subjected to +4°C shock for a week or two before left for germination. Pre-hydration followed by re-drying increased the germination to some extent (28%). These findings reveal that the storage conditions are important for establishing a seed bank of D. tenuifolia, in order to get highest germination.
Genus Diplotaxis is represented by more than 20 species mainly distributed in the North Mediterranean. Out of these Diplotaxis tenuifolia (wild rocket) is used widely in Italian and French cuisine. It has also been used for medicinal purpose for different illnesses throughout the history. In this study the germination behaviour of the seeds of D. tenuifolia was investigated. The seeds were very sensitive to pH and salinity stress. The seed germination increased under daylight conditions reaching a level of 80 percent but decreased in dark and continuous light. A remarkable increase was recorded (60%) in the germination of seeds subjected to +4°C shock for a week or two before left for germination. Pre-hydration followed by re-drying increased the germination to some extent (28%). These findings reveal that the storage conditions are important for establishing a seed bank of D. tenuifolia, in order to get highest germination.