干旱胁迫对苦荞农艺性状及黄酮类物质含量的影响

Effects of Drought Stress on Agronomic Traits and Flavonoid Compound Contents of Tartary Buckwheat

以川荞1号和晋荞2号为材料,设置自然干旱胁迫处理,分别在7、14 d取样测定川荞1号和晋荞2号农艺性状以及叶片、根系、籽粒中总黄酮、芦丁、槲皮素含量。结果表明,干旱胁迫7 d时,2种苦荞的茎粗、株高、叶片数、根体积、晋荞2号的根长和侧根数均显著降低,2种苦荞的茎节数、川荞1号的根长和侧根数均无显著性差异。干旱胁迫14 d时,2种苦荞的株高、叶片数、根体积、晋荞2号茎粗、节数、根长均显著降低,2种苦荞的侧根数、川荞1号茎粗、节数、根长均无显著性差异。干旱胁迫7、14 d时,2种苦荞叶中总黄酮、芦丁、槲皮素含量均降低;根、籽粒中总黄酮、芦丁、槲皮素含量均升高。其中,干旱胁迫7 d时,晋荞2号籽粒中总黄酮和芦丁含量均显著升高。

Chuanqiao 1 and Jinqiao 2 were treated with drought stress.The agronomic characters of Chuanqiao 1 and Jinqiao 2 and the contents of total flavonoids,rutin and quercetin in leaves,roots and grains were determined by sampling on 7 and 14 days,respectively.The results showed that under drought stress for 7 d,the stem diameter,plant height,leaf number,root volume,root length and lateral root number of Jinqiao 2 decreased significantly,but the number of stem nodes,root length and lateral root number of Chuanqiao 1 were not significantly different between the two kinds of Tartary buckwheat.Under drought stress for 14 d,the plant height,leaf number and root volume of the two Tartary buckwheat species were studied.The number of root and root of 2 kinds of Tartary buckwheat was not significant,and the number of lateral roots of two kinds of Tartary buckwheat was not significant.After drought stress for 7 and 14 d,the contents of total flavonoids,rutin and quercetin in the leaves of two kinds of Tartary buckwheat decreased,while the contents of total flavonoids,rutin and quercetin in roots and grains increased.The contents of total flavonoids and rutin in Jinqiao 2 grain were significantly increased.