Glucose delays seed germination in Arabidopsis thaliana
Glucose delays seed germination in Arabidopsis thaliana
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DOI：
10.1007/s00425-003-1154-9
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发表时间：
2004-02-01
期刊：
影响因子：
4.3
通讯作者：
Smeekens, SCM
中科院分区：
文献类型：
--
作者：
Dekkers, BJW;Schuurmans, JAMJ;Smeekens, SCM
本文报道了葡萄糖对拟南芥（Arabidopsis thaliana（L.）嘿浓度低于已知抑制早期幼苗发育的浓度。这种抑制作用于胚胎生长，并且不依赖于己糖激酶（HXK）的功能。将激素和激素抑制剂施加到萌发培养基中，并在葡萄糖培养基上测试了几种激素生物合成和信号转导突变体，以研究脱落酸（阿坝）、赤霉素和乙烯在葡萄糖诱导的萌发延迟中的可能作用。结果表明，葡萄糖对萌发的抑制不能被乙烯或赤霉素所拮抗，并且不依赖于HXK 1/阿坝/ABI 4信号级联。这些发现表明，存在独立于ABI 2/ABI 4/ABI 5的单独调节通路。因此，在相对较短的时间内，糖利用不同的信号级联来抑制发芽和发芽后的生长，强调糖反应的复杂性。
Here we report that glucose delays germination of Arabidopsis thaliana (L.) Heynh. seeds at concentrations below those known to inhibit early seedling development. This inhibition acts on embryo growth and is independent of hexokinase (HXK) function. Hormones and hormone inhibitors were applied to the germination media and several hormone biosynthesis and signalling mutants were tested on glucose media to investigate a possible role of abscisic acid (ABA), gibberellin and ethylene in the glucose-induced germination delay. Results indicate that the germination inhibition by glucose cannot be antagonized by ethylene or gibberellin and is independent of the HXK1/ABA/ABI4 signalling cascade. These findings suggest that there is a separate regulatory pathway independent of ABI2/ABI4/ABI5. Thus, in a relatively short time frame sugars utilize different signalling cascades to inhibit germination and post-germination growth, underlining the complexity of sugar responses.