乙烯利
生长素
赤霉素
生物
扩张素
延伸率
细胞生物学
乙烯
生物化学
基因表达
植物
基因
极限抗拉强度
催化作用
冶金
材料科学
作者
Yushi Zhang,Yubin Wang,Delian Ye,Jiapeng Xing,Liusheng Duan,Zhaohu Li,Mingcai Zhang
出处
期刊:Plant Science
[Elsevier]
日期:2020-01-01
卷期号:290: 110196-110196
被引量:35
标识
DOI:10.1016/j.plantsci.2019.110196
摘要
Ethephon efficiently regulates plant growth to modulate the maize (Zea mays L.) stalk strength and yield potential, yet there is little information on how ethylene governs a specific cellular response for altering internode elongation. Here, the internode elongation kinetics, cell morphological and physiological properties and transcript expression patterns were investigated in the ethephon-treated elongating internode. Ethephon decreased the internode elongation rate, shortened the effective elongation duration, and advanced the growth process. Ethephon regulated the expression patterns of expansin and secondary cell wall-associated cellulose synthase genes to alter cell size. Moreover, ethephon increased the activities and transcripts level of phenylalanine ammonia-lyase and peroxidase, which contributed to lignin accumulation. Otherwise, ethephon-boosted ethylene evolution activated ethylene signal and increased ZmGA2ox3 and ZmGA2ox10 transcript levels while down-regulating ZmPIN1a, ZmPIN4 and ZmGA3ox1 transcript levels, which led to lower accumulation of gibberellins and auxin. In addition, transcriptome profiles confirmed previous results and identified several transcription factors that are involved in the ethephon-modulated transcriptional regulation of cell wall biosynthesis and modification and responses to ethylene, gibberellins and auxin. These results indicated that ethylene-modulated auxin and gibberellins signaling mediated the transcriptional operation of cell wall modification to regulate cell elongation in the ethephon-treated maize internode.
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