数字农科院2.0

Graphene Oxide And Aba Cotreatment R.egulates Root Growth Of B rassica Napus L. By Regulating Iaa/Aba

文献类型： 外文期刊

作者： Xie, LL; Chen, F; Zou, XL; Shen, SS; Wang, XG; Yao, GX; Xu, BB

作者机构：

关键词： ABA; GO; IAA; Root growth; SA

期刊名称： JOURNAL OF PLANT PHYSIOLOGY

ISSN： 0176-1617

年卷期： 2019 年 240 卷

页码：

收录情况： JCR（2021版）

摘要： Previous studies have proven that graphene oxide (GO) regulates abscisic acid (ABA) and indole-3-acetic acid (IAA) contents and modulates plant root growth. To better understand the mechanism of plant growth and development regulated by GO and crosstalk between ABA and GO, Zhongshuang No. 9 seedlings were treated with GO and ABA. The results indicated that GO and ABA significantly affected the morphological properties and endogenous phytohormone contents in seedlings, and there was significant crosstalk between GO and ABA. ABA treatments combined with GO led to a rapid decrease in triphenyltetrazolium chloride (TTC) reduction intensity, and the inhibitory effect was enhanced with increasing ABA concentration. The treatments significantly affected the transcriptional levels of some key genes involved in the ABA, IAA, cytokinin (CTK), salicylic acid (SA), and ethane (ETH) pathways and increased the ABA and gibberellin (GA) contents in rapeseed seedlings. The effects of the treatments on the IAA and CTK contents were complex, but, importantly, the treatments suppressed root elongation. Correlation analysis also indicated that the relationship between root length and IAA/ABA could be described by a polynomial function: y = 88.11x(2) - 25.15x + 4.813(R-2 = 0.912). The treatments increased the ACS2 transcript abundance for ETH biosynthesis and the ICS1 transcriptional level of the key genes involved in salicylic acid (SA) biosynthesis, as well as the downstream signaling genes CBP60 and SARD1. This finding indicated that ABA is an important factor regulating the effects of GO on the growth and development of Brassica napus L., and that ETH and SA pathways may be potential pathways involved in the response of rape seedlings to GO treatment.

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