Abscisic acid inhibits germination and indirectly delays ethylene biosynthesis of Beta vulgaris
Abscisic acid inhibits germination and indirectly delays ethylene biosynthesis of Beta vulgaris
复制标题
脱落酸抑制甜菜发芽并间接延迟乙烯生物合成
DOI：
10.15258/sst.2015.43.2.18
复制
发表时间：
2015
影响因子：
1.4
通讯作者：
M. Proft
中科院分区：
文献类型：
--
作者：
W. Abts;B. Poel;B. Vandenbussche;M. Proft
乙烯和脱落酸（ABA）已知在一些物种的萌发过程中相互作用。然而，乙烯在甜菜发芽过程中没有参与，质疑与ABA的可能相互作用。我们的研究结果表明，ABA以浓度依赖性的方式延迟了白僵菌的萌发。通过对乙烯合成途径的分析，发现在添加ABA的情况下，乙烯的释放速度被推迟，这很可能是由于发芽率较慢。1-氨基环丙烷-1-羧酸（ACC）影响ABA水平的反向交互作用似乎不发生在寻常草中，因为在不同浓度ACC的存在下，萌发过程中ABA含量没有变化。某些植物生长调节剂（ABA、ACC和生长素）在果皮中的含量也比真种子高得多。推测果皮在白杨萌发过程中起着重要的作用，因为它是激素水平差异巨大的理化边界。本研究结果表明，乙烯不参与野刺草萌发过程，乙烯对野刺草萌发过程中ABA含量没有影响。
Ethylene and abscisic acid (ABA) are known to interact during the germination of several species. However, ethylene is not involved during the germination of Beta vulgaris, questioning a possible interaction with ABA. Our results have shown that ABA delays the germination of B. vulgaris in a concentration-dependent manner. By analysing the ethylene biosynthesis pathway, the ethylene release rate was shown to be delayed when ABA is supplemented, most probably due to the slower germination rate. The inverse interaction in which 1-aminocyclopropane-1-carboxylic acid (ACC) affects ABA levels does not seem to occur in B. vulgaris as no changes in ABA content were observed during germination in the presence of ACC at different concentrations. Levels of certain plant growth regulators (ABA, ACC and auxin) were also shown to be much higher in the fruit pericarp compared with the true seed. Presumably the pericarp plays an important role during the germination process of B. vulgaris because it is a physiochemical boundary with drastic differences in hormone levels. Our results clearly show demonstrate that ethylene is not involved during the actual germination of B. vulgaris, and that there is no effect of ethylene on ABA during germination of B. vulgaris.