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测定了不同水稻品种叶鞘内游离氨基酸及草酸的含量 ,并对草酸对褐稻虱的生物活性进行了测定 .试验结果表明 :水稻叶鞘内含有 2 1种游离氨基酸 ,在小粒野生稻中 ,氨基酸总量及天冬氨酸、谷氨酸、天冬酰胺、丝氨酸、丙氨酸和缬氨酸等 6种主要游氨基酸含量分别为 :40 5 7.9、2 15 .0、30 8.3、6 11.8、5 71.2、192 .1和 94.7μg/g ,均低于感虫品种TN1中的含量 .此外 ,小粒野生稻内草酸含量为 0 .38mg/g ,明显高于感虫品种TN1中的草酸含量
The contents of free amino acids and oxalic acid in leaf sheaths of different rice varieties were determined and the bioactivity of oxalic acid to brown planthopper (BPH) was determined.The results showed that there were 21 kinds of free amino acids in the leaf sheath of rice, The content of 6 major amino acids such as aspartic acid, glutamic acid, asparagine, serine, alanine and valine were 40 5 7.9,2 15 .0,30 8.3,6 11.8,5 71.2, 192.1 and 94.7 μg / g, respectively, which were lower than that of the susceptible strain TN1.In addition, the content of oxalic acid in the small-sized wild rice was 0.38 mg / g, which was significantly higher than that of the oxalic acid in the susceptible strain TN1