【摘要】 以烤烟品种红花大金元(红大)适熟期中部叶为材料,研究了烟叶主脉、一级侧脉、二级侧脉中非挥发性有机酸、木质素、可溶性总糖和烟碱含量的差异。结果表明,叶脉占烟叶干重60%以上;非挥发性脂肪酸、木质素、可溶性总糖和烟碱含量各级叶脉间的差异均达到显著水平,其中饱和脂肪酸、不饱和脂肪酸、高级脂肪酸和烟碱含量表现为二级侧脉>一级侧脉>主脉;二元脂肪酸和木质素含量表现为主脉>一级侧脉>二级侧脉;而可溶性总糖则主脉中含量最高,一级侧脉中的含量小于二级侧脉。更多还原

【Abstract】 Using ripe middle leaves of flue-cured tobacco cv.Honghuadajinyuan as experimental material,the contents of nonvolatile organic acids,lignin,soluble sugar and nicotine in primary veins,primary lateral veins and secondary lateral veins of tobacco leaves were compared.The results showed that veins accounted for more than 60% of the dry weight of whole leaf;the contents of nonvolatile fatty acid,lignin,soluble sugar and nicotine in various leaf veins differed significantly,the veins in order of the contents of saturated fatty acids,unsaturated fatty acids,high fatty acid and nicotine were secondary lateral vein > primary lateral vein > primary vein,while the contents of dicarboxylic fatty acid and lignin were on the contrary;as for soluble sugar content,the order was primary vein > secondary lateral vein > primary lateral vein.更多还原