对田间发现的胡萝卜雄性不育株作了调查与观察 ,并与可育株作了形态特征比较。结果表明 :(1)胡萝卜雄性不育株占群体总株数的 0 .786 %。 (2 )不育花花瓣为绿色 ,雄蕊为绿色瓣花型 ,不完全花瓣状 ,无花丝 ,花粉 ;花柱 ,柱头及子房完全被花瓣状结构所包裹 ,不易被发现。可育花花瓣为白色 ,花丝细长 ,白色 ,白色花药肥厚 ,布满花粉 ;花柱、柱头及子房明显。(3)观察至不育株育性对温度具敏感性 The carrot male sterile plants discovered in the field were investigated and observed, and morphological characteristics were compared with that of fertile plants. The results showed that: (1) The male sterile male carrot accounted for 0.786% of the total number of the population. (2) The petals of sterile flowers are green, and the stamens are green petals. They are not completely petal-shaped, nor filiform and pollens. The style, stigma and ovary are completely covered by petal-like structures and are not easily found. Fertile flower petals are white, filaments slender, white, white anthers hypertrophy, covered with pollen; style, stigmas and ovaries significantly. (3) Observed to sterile plant fertility is temperature sensitive