近30年来,全世界向日葵面积已由1946年的600万公顷,发展到1979年的1300多万公顷,增长116％;某产量和食用量已先后超过芝麻油、菜油和花生油,成为仅次于大豆油的第二大植物油源。目前仍有扩展的趋势,其主要原因之一是,向日葵具有适应性广、抗逆性强的特点,尤以抗旱牲较为突出,因此国外对其抗旱机理的研究日渐增 In the past 30 years, the area of ​​sunflowers in the world has grown from 6 million hectares in 1946 to 13 million hectares in 1979, an increase of 116%. Some of the output and consumption of sunflower has surpassed sesame oil, vegetable oil and peanut oil successively, becoming the second only to soybean oil The second largest plant oil source. At present, there is still an expanding trend. One of the main reasons for this is that sunflower has the characteristics of wide adaptability and strong resistance, especially the drought-resistant ones are more prominent. Therefore, the research on the mechanism of drought resistance in foreign countries is increasingly increasing