在光照培养室内种植大豆[Giycine max (Linn.) Merrill]幼苗,以单侧红光和单侧自然光作为光源, 30 d后测定大豆幼苗的株高、鲜重和干重等生长指标和可溶性糖、叶绿素、蛋白质含量等生理指标.结果表明,单侧红光或单侧自然光处理下的幼苗都有明显的向光性生长现象;单侧红光处理大豆幼苗株高显著高于单侧自然光处理;幼苗鲜重和干重没有显著差异;所测定的3项生理指标在两组中都存在极显著差异,自然光中大豆幼苗的可溶性糖高于红光中大豆幼苗的可溶性糖含量,前者大约为后者的16倍;红光中大豆幼苗的蛋白质、叶绿素a、叶绿素b和叶绿素(a+b)含量均高于自然光中大豆幼苗的含量,前者分别是后者的1.50倍、1.14倍,1.19倍和1.16倍.%Soybean seedlings were cultivated in the light culture room, using unilateral red light and unilateral sunlight as light source. After a period of 30 days, the ecological indexes, including seedling height, fresh weight and dry weight of seedling were measured, and several physiological indexes such as soluble sugar content, chlorophyll content and protein content were also determined. The results showed that all the seedlings had the phenomenon of phototropism under exposure of unilateral red light or unilateral sunlight. The seedling height in the treated group of unilateral red light was significantly higher than in the treated group of unilateral sunlight. However, fresh weight and dry weight had no significant differences between two groups. The three physiological indexes had extremely significant differences between two groups. Soluble sugar content in unilateral sunlight treatment was 16 times higher than in the unilateral red light treatment. Protein content, chlorophyll a content, chlorophyll b content and chlorophyll(a+b) content in the unilateral red light treatment was 1.5 times, 1.14 times, 1.19 times and 1.16 times higher than in the unilateral sunlight treatment, respectively.
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