棉 花 学 报     Cotton  Science   2010，22（2）：125-131

The Effect of Enhanced UV-B Radiation on the Physiological Indicator, Quality and Yield of Cotton
WANG Jin¹, ZHANG Jing², FAN Xin-yan¹, WANG Shao-ming², TIAN Li-ping², JIN Lü-sheng¹
(1.Wulanwusu Agrometeorological Experiment Station, Shihezi, Xinjiang 832003, China; 2.College of Life Sciences, Shihezi University, Shihezi, Xinjiang 832003, China)

Abstract: The objectives of this research were to study the influences of enhanced ultraviolet radiation (UV-B, 280～320 nm) on physiological indicator, yield and quality of cotton fiber under cropland conditions. Through increasing UV-B radiation, with 0 W·m^-2 (R0)、0.5 W·m^-2 (R1)、1W·m^-2 (R2)、1.5W·m^-2（R3）for the four processing, the effects of enhancing Ultraviolet-B radiation on chlorophyll content, soluble protein and free proline content of cotton leaves were studied. With the increase in UV-B radiation, chlorophyll content and soluble protein content increased at first and decreased afier then.The relative content of proline was elevated, yield and quality of cotton decreased significantly. Enhancing UV-B radiation resulted in damage to cotton. When the radiation exceeds the threshold of cotton plant, led to the greater injury, resulted in the quality and cotton production reduce at last.
Key words: UV-B radiation; cotton; physiological indicator; yield; quality   [Full Text, 562KB]