摘要
通过室外盆栽试验,研究了在4个不同氮水平条件下,增强UV-B辐射(0.57 W/m2)对水稻(Oryza sativa L.)生理生化指标的影响。结果表明,在自然光照条件下,适当提高氮水平可以促进超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)的合成,并降低丙二醛(MDA)和超氧阴离子(O-2·)的含量;增强UV-B辐射提高了SOD、POD以及CAT的活性,但MDA和O-2·的含量也显著上升;在增强UV-B辐射条件下,中氮处理(200 kg/hm2)使MDA和O-2·的含量最低,同时,SOD、POD和CAT的活性也相对较高,表明中氮处理可能提高了水稻对增强UV-B辐射的抗性。
Effects of different levels of nitrogen on the physiology and biochemistry of rice under enhanced UV-B radiation （0.57 W/m^2） were studied by pot experiment outdoor.The results showed that appropriate nitrogen addition promoted the synthesis of superoxide dismutase（SOD）,peroxidase（POD） and catalase（CAT） and reduced the content of malonaldehyde（MDA） and superoxide anion radical （O-2·.Enhanced UV-B radiation increased the activity of SOD,POD and CAT,but the content of MDA and O-2·increased at the same time.The middle level of nitrogen（200kg/hm^2） made the MDA and O-2·content become the lowest.The SOD,POD and CAT activity were comparatively high under the enhanced UV-B radiation.It is indicated that the middle level of nitrogen may improve the resistance to enhanced UV-B radiation in rice.
出处
《湖北农业科学》
北大核心
2014年第6期1249-1252,共4页
Hubei Agricultural Sciences
基金
河南省科技攻关项目(82300433202)
河南省水稻重大专项(091100110401)
