30多年前,在对植物氮代谢研究中,科学家发现植物受水分胁迫时,体内可溶性氮与总氮量都有变化,氨基酸的类型也随之改变,尤其是游离脯氨酸浓度的增加,引起许多学者的注意。六十年代一些学者提出,作物受水分胁迫时,脯氨酸的积累是氮代谢的一个主要途径,其积累水平,可作为作物抗旱的生理指标。后来,通过对大麦、高粱、棉花、玉米等作物的研究,肯定了许多作物遭受干旱时,均有游离脯氨酸积累,这是作物对干旱的抵抗反 More than 30 years ago, in the study of plant nitrogen metabolism, scientists found that plants under water stress, the body of soluble nitrogen and total nitrogen have changed, the type of amino acids also change, especially free proline concentration increased, causing Many scholars pay attention. Some scholars in the 1960s suggested that accumulation of proline is one of the main pathways for nitrogen metabolism in crops under water stress, and its accumulation level can be used as a physiological indicator of crop drought resistance. Later, research on crops such as barley, sorghum, cotton and corn confirmed the accumulation of free proline in many crops when they were exposed to drought as the resistance of crops to drought