Mehmet Ali ÇULLU, Sema KARAKAŞ, Murat DİKİLİTAŞ

In Vitro Koşullarda Halofit Bitkilerden Salsola soda ve Portulaca oleracea'nın NaCl Stresine Karşı Çimlenme ve Gelişim Durumları

Tohumların çimlenmesinde tuz stresi önemli bir etkiye sahiptir. Yüksek tuz stresinde tohumlarınçimlenebilmesi, türün tolerans kabiliyetine bağlıdır. Tuza tolerans gösteren bitkilerin yaşam döngüleriiçinde tuza duyarlı oldukları en kritik dönem çimlenme ve fide dönemleridir. Bu çalışmada tuz stresinetoleranslı halofit bitkilerden Salsola soda ve Portulaca oleraceanın çimlenme aşamasında artan NaCl dozlarına (0-, 50-, 100-, 150-, 200-, 250-, 300-, 350-, 400-, 450-, 500-, 550 ve 600 mM) karşı toleransıbelirlenmiştir. Petri kaplarında çimlenen tohumların ikinci hafta sonunda çimlenme yüzdesi, radikul vehipokotil uzunluğu, yaş ağırlık, çimlenme ve vigor indeksleri artan tuz stresi ile negatif bir ilişkigöstermiştir (P

Germination and Development of Halophyte Plants of Salsola soda and Portulaca olerecea Against NaCl Stress in In Vitro Conditions

Salt stress has an important effect on seed germination. Germination ability depends on the tolerancelevel of species under high salt concentrations. The most sensitive period to salt stress for the salttolerant plants is the germination or seedling stage. In this study, performance of salt toleranthalophyte species of Salsola soda and Portulaca oleracea were determined in germination periodaganist increasing NaCl levels (0-, 50-, 100-, 150-, 200-, 250-, 300-, 350-, 400-, 450-, 500-, 550 ve 600mM). Germination percentage, radicule and hypocotyl lenghts, fresh weight, and vigor index values ofseeds after two weeks in Petri plates showed negative correlation with the increase of salt stress(P

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