Strigolactone may interact with gibberellin to control apical dominance in pea (Pisum sativum)
Strigolactone may interact with gibberellin to control apical dominance in pea (Pisum sativum)
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DOI：
10.1007/s10725-011-9603-0
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发表时间：
2011-11-01
影响因子：
4.2
通讯作者：
Sorce, Carlo
中科院分区：
文献类型：
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作者：
Luisi, Alessandro;Lorenzi, Roberto;Sorce, Carlo
独脚金内酯作为植物生长调节剂的作用已经通过对生物合成和信号传导突变体植物的研究以及通过使用GR 24（这类分子的合成类似物）而得到证实。独脚金内酯突变体显示出浓密的表型，并且GR24应用抑制了这些突变体中腋芽的生长，从而恢复了野生植物的表型，其特征在于更强的顶端优势。在这项工作中，我们测试了这种化学物质对豌豆（豌豆）植物的有效性，顶端切除，破坏顶端优势，导致腋芽生长。此外，我们寻找的响应独脚金内酯和赤霉素代谢之间的关系，通过应用GR 24的攀爬和矮生豌豆，后者是赤霉素生物合成的突变体。结果表明，内源水平的生物活性赤霉素GA1可能会调节断头豌豆植物GR24的反应，通过改变芽的敏感性所施加的独脚金内酯。
The role of strigolactones as plant growth regulators has been demonstrated through research on biosynthesis and signaling mutant plants and through the use of GR24, a synthetic analog of this class of molecules. Strigolactone mutants show a bushy phenotype and GR24 application inhibits the growth of axillary buds in these mutants, thus restoring the phenotype of a wild plant, which is characterized by a stronger apical dominance. In this work, we tested the effectiveness of this chemical on pea (Pisum sativum) plants following apex removal, which disrupts apical dominance and leads to axillary bud outgrowth. Moreover, we searched for relationships between the response to the strigolactone and gibberellin metabolism by applying GR24 to both climbing and dwarf peas, the latters being mutants for gibberellin biosynthesis. The results suggest that the endogenous level of the bioactive gibberellin GA1 might modulate the response of decapitated pea plants to GR24, by changing bud sensitivity to the applied strigolactone.