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淹水向日葵茎中的程序性细胞死亡与通气组织形成及其受乙烯和活性氧的促进作用

Programmed Cell Death and Aerenchyma Formation in Water-Logged Sunflower Stems and Its Promotion by Ethylene and ROS.

作者信息

Ni Xi-Lu, Gui Meng-Yuan, Tan Ling-Ling, Zhu Qiang, Liu Wen-Zhe, Li Chang-Xiao

机构信息

Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration of North-western China, Key Lab for Restoration and Reconstruction of Degraded Ecosystem in North-western China of Ministry of Education, Yinchuan, China.

Key Laboratory for the Eco-Environment of the Three Gorges Reservoir Region of the Ministry of Education, College of Life Science, Southwest University, Chongqing, China.

出版信息

Front Plant Sci. 2019 Jan 9;9:1928. doi: 10.3389/fpls.2018.01928. eCollection 2018.

DOI:10.3389/fpls.2018.01928
PMID:30687344
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6333753/
Abstract

Previous studies have shown that waterlogging/ hypoxic conditions induce aerenchyma formation to facilitate gas exchange. Ethylene (ET) and reactive oxygen species (ROS), as regulatory signals, might also be involved in these adaptive responses. However, the interrelationships between these signals have seldom been reported. Herein, we showed that programmed cell death (PCD) was involved in aerenchyma formation in the stem of . Lysigenous aerenchyma formation in the stem was induced through waterlogging (WA), ethylene and ROS. Pre-treatment with the NADPH oxidase inhibitor diphenyleneiodonium (DPI) partially suppressed aerenchyma formation in the seedlings after treatment with WA, ET and 3-amino-1, 2, 4-triazole (AT, catalase inhibitor). In addition, pre-treatment with the ethylene perception inhibitor 1-methylcyclopropene (1-MCP) partially suppressed aerenchyma formation induced through WA and ET in the seedlings, but barely inhibited aerenchyma formation induced through ROS. These results revealed that ethylene-mediated ROS signaling plays a role in aerenchyma formation, and there is a causal and interdependent relationship during WA, ET and ROS in PCD, which regulates signal networks in the stem of .

摘要

先前的研究表明，涝渍/缺氧条件会诱导通气组织形成以促进气体交换。乙烯（ET）和活性氧（ROS）作为调节信号，可能也参与了这些适应性反应。然而，这些信号之间的相互关系鲜有报道。在此，我们表明程序性细胞死亡（PCD）参与了[植物名称未给出]茎中通气组织的形成。茎中溶生性通气组织的形成是通过涝渍（WA）、乙烯和ROS诱导的。用NADPH氧化酶抑制剂二苯基碘鎓（DPI）预处理，部分抑制了经WA、ET和3-氨基-1,2,4-三唑（AT，过氧化氢酶抑制剂）处理后幼苗中通气组织的形成。此外，用乙烯感知抑制剂1-甲基环丙烯（1-MCP）预处理，部分抑制了幼苗中经WA和ET诱导的通气组织形成，但几乎不抑制经ROS诱导的通气组织形成。这些结果表明，乙烯介导的ROS信号在通气组织形成中起作用，并且在PCD过程中WA、ET和ROS之间存在因果和相互依存的关系，这调节了[植物名称未给出]茎中的信号网络。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f2dc/6333753/3e9e3328266f/fpls-09-01928-g0010.jpg
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