Dergiler / EurAsian Journal of BioSciences (elektronik) / 2008 / Sayı: 2
Induction of salt tolerance in pepper (Capsicum annuum) by 24-epibrassinolide
- Sayı
- 2008 · Sayı: 2
- Sayfa
- 83–90
- DOI
- —
Özet
Biber bitkilerinde, tuzlulugun inhibitor etkilerini gidermede rassinosteroitlerin etkinligini arastirmak uzere, sera kosullarinda kisa donemli bir test gerceklestirildi. Tuzlu su ile sulanan biber bitkilerinde (Capsicum annuum) farkli 24-epibrassinolit konsantrasyonlarinin (0.0, 0.01, 0.05, 0.1, ve 0.5 mg L-1) yapraklara uygulanmasinin buyume, nispi su icerigi ve klorofil floresansi uzerine etkileri incelendi. Tuz, cesitli buyume parametrelerini etkiler. Ancak, tuzun etkileri koklerden ziyade surgunlerde daha belirgindi. 24-epibrassinolit'in harici uygulanmasinin, surgun buyume parametreleri ve yaprak nispi su icerigi uzerindeki tuz stresinin inhibitor etkilerini gidermede etkili oldugu goruldu. Ancak, 24-epibrassinolit'in, kok buyumesi ve klorofil floresansi uzerinde onemli bir etkisi gozlenmedi. Bes konsantrasyon icerisinde, stres sartlari altinda 0.5 mg L-1'nin en iyi sonucu verdigi goruldu.
Abstract
In order to study the effectiveness of brassinosteroids on the amelioration of the inhibitory effect of salinity on pepper plants, a short-term experiment was conducted in greenhouse to test different concentrations of 24-epibrassinolide (0.0, 0.01, 0.05, 0.1, and 0.5 mg L-1) by foliar application on growth, relative water contents and chlorophyll fluorescence of pepper (Capsicum annuum cv. Beldi) plants irrigated with salt water (0.4 g L-1 NaCl). Salt decreases the different parameters of growth. However, its effects were more pronounced on the shoot than root growth. An exogenous supply of 24-epibrassinolide was found to be successful in alleviating of the inhibitory effects of salt stress on shoot growth parameters and the leaf relative water contents. However, non-significant effect of 24-epibrassinolide was observed on root growth and chlorophyll fluorescence. Out of the five concentrations, the effects of 0.5 mg L-1 proved the best under stress conditions.