论文部分内容阅读
以京冬 6号为材料分析了小麦籽粒发育期籽粒、籽粒腹腔液、穗梗韧皮部汁液、旗叶、旗叶韧皮部汁液和根系伤流液中氨基酸含量及组分的变化。籽粒中以谷氨酰胺和谷氨酸 ( Gln+Glu)、脯氨酸 ( Pro)、丙氨酸( Ala)、天冬氨酸和天冬酰胺 ( Asn+Asp)、丝氨酸 ( Ser)和甘氨酸 ( Gly)为主。籽粒腹腔液中以 Ala、γ-氨基丁酸( γ-Aba)、Ser、Gln和 Gly为主。穗梗韧皮部汁液中 Asn、苏氨酸 ( Thr)、Ala、Ser和 Gln占总氨基酸的 70 %以上。旗叶中主要是 Ala、Asn、Ser、缬氨酸 ( Val)、Pro、Gly、Thr和 Asp,旗叶韧皮部汁液中 Gln占总氨基酸的 2 0 %以上 ,其次为 Asp、Thr、Va、Ser、亮氨酸 ( Leu)和 Asn。茎基部导管汁液中 ,Gln占总氨基酸的 3 8.52 % ,Ala、Ser、Thr和 Val的比例均在 5%以上。结果表明籽粒对氨基酸的吸收利用有选择性 ,整株氨基酸的运输和转换是活跃的 ,并提出了籽粒发育期整株间氨基酸协调转化的模式
The changes of amino acid content and composition in the grain, grain peritoneal fluid, phloem juice in phloem, flag leaf, phloem sap and root wound fluid were analyzed with Jingdong 6 as materials. Glutamic acid and glutamic acid (Gln + Glu), proline (Pro), alanine (Ala), aspartic acid and asparagine (Asn + Asp), serine and glycine (Gly) based. In the peritoneal fluid, Ala, γ-aminobutyric acid (γ-Aba), Ser, Gln and Gly were the main components. Asn, Thr, Ala, Ser and Gln in the phloem sap of ear were more than 70% of total amino acids. The main contents of flag leaves were Ala, Asn, Ser, Val, Pro, Gly, Thr and Asp. Gln in flag leaf phloem juice accounted for more than 20% of total amino acids, followed by Asp, Thr, Va, Ser , Leu and Asn. Glutin contained 3 8.52% of the total amino acids, and Ala, Ser, Thr and Val were all above 5%. The results showed that the grain was selective for the absorption and utilization of amino acids, the transport and conversion of the whole plant amino acids were active, and the pattern of coordinated conversion of amino acids in whole grains during grain development was proposed