Strigolactone elevates ethylene biosynthesis in etiolated Arabidopsis seedlings
Strigolactone elevates ethylene biosynthesis in etiolated Arabidopsis seedlings
复制标题
DOI：
10.1080/15592324.2020.1805232
复制
发表时间：
2020-08-17
影响因子：
2.9
通讯作者：
Yoon, Gyeong Mee
中科院分区：
文献类型：
--
作者：
Lee, Han Yong;Yoon, Gyeong Mee
气体植物激素乙烯影响植物生命的许多方面，包括发芽、果实成熟、衰老和胁迫反应。乙烯的这些不同作用部分地通过与其他植物激素的串扰而发生，这影响了乙烯的生物合成和信号传导途径。我们最近发现，植物激素，包括赤霉酸，脱落酸，生长素，茉莉酸甲酯，水杨酸，调节ACC脱氢酶（ACS），乙烯生物合成的限速酶的稳定性。在这里，我们报告，处理黄化拟南芥幼苗独脚金内酯（SL）增加乙烯生物合成。SL不影响ACS的稳定性或ACS基因的表达，但它增加了ACC氧化酶（ACO）基因的转录水平，从而增强乙烯的生物合成。与我们以前的研究结果一起，这些发现表明，大多数植物激素差异调节乙烯生物合成在黑暗中生长的拟南芥幼苗通过影响ACS稳定性和/或乙烯生物合成基因的转录水平。
The gaseous phytohormone ethylene influences many aspects of plant life, including germination, fruit ripening, senescence, and stress responses. These diverse roles of ethylene occur in part through crosstalk with other phytohormones, which affects ethylene biosynthesis and signaling pathways. We have recently shown that the phytohormones, including gibberellic acid, abscisic acid, auxin, methyl jasmonate, and salicylic acid, regulate the stability of ACC synthases (ACSs), the rate-limiting enzymes in ethylene biosynthesis. Here, we report that treatment of etiolated Arabidopsis seedlings with strigolactone (SL) increases ethylene biosynthesis. SL does not influence ACS stability orACSgene expression, but it increases the transcript levels of a subset of ACC oxidase (ACO) genes, thereby enhancing ethylene biosynthesis. Taken together with the results of our previous study, these findings demonstrate that most phytohormones differentially regulate ethylene biosynthesis in dark-grown Arabidopsis seedlings by affecting ACS stability and/or the transcript levels of ethylene biosynthesis genes.