PJB-2019-523
SILICATE FERTILIZER ENHANCED GROWTH AND RESISTANCE OF RED RICE (Oryza sativa L. 'Cempo Merah') TO UV-B IRRADIATION
Lisra Sukestywarani Putri
Abstract
Ultraviolet B (UV-B) radiation may cause changes in the chemical composition of plants causing photooxidative stress. Silicon (Si) is a beneficial element for rice which acts as a physical defense against biotic and abiotic stresses. Si also acts as UV screening which can decrease UV radiation. The potency of silicon on the growth and resistance of red rice (Oryza sativa L. 'Cempo Merah') under ultraviolet B irradiation was observed through application of silicate fertilizer is consisted of 3 levels ie 0 mg/kg, 75 mg.kg-1, and 150 mg.kg-1 of CaSiO3. The UV-B irradiation treatment was performed with 3 different irradiations i.e. without irradiation, irradiation with UV-B lamp 9 watts (5.79 kJ /m2) and 15 watts (11.35 kJ/m2). The growth variables included plant height, number of leaves, plant biomass, levels of chlorophyll, superoxide dismutase (SOD) and total phenol. This study also observed leaf anatomical variables including stomata density and thickness of leaf epidermis. Application of silicate fertilizer increased plant height, number of leaves, chlorophyll level, stomata density and the thickness of leaf epidermis in UV-B irradiation stress. Silicate fertilizer also increased plant resistance as indicated by decreasing SOD and total phenol levels in UV-B irradiation treatments on rice (Oryza sativa L. 'Cempo Merah').
To Cite this article:
Download
