两种烟草(Nicotiana tabacum L.)对盐度的生理和分子响应品种

IF 3.7 2区 农林科学 Q1 AGRONOMY
Yuelin Wang, Hanjun Zhou, Liang Xu, Xiefeng Ye
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引用次数: 0

摘要

本研究比较了两个不同耐盐性的烟草品种basma(东方烟草)和K326(烤烟)萌发期在NaCl胁迫下的耐盐性。与K326相比,Basma表现出更高的抗氧化酶活性(1.16 ~ 3.58倍),在活性氧(ROS)积累高峰期间降低了16.5%的水平,并通过上调NtSOS1有效调节离子稳态,使地上组织Na+积累减少21.01 ~ 22.90倍,地下组织Na+积累减少12.84 ~ 14.15倍。此外,在盐水胁迫72 h后,Basma使地下组织中的吲哚- 3 -乙酸(IAA)含量增加了1.5倍,这一变化得到了NtPIN4表达增加的支持。综上所述,Basma通过提高抗氧化酶活性、调节离子稳态和维持IAA平衡,表现出比K326更强的耐盐性。由此可见,增强活性氧清除能力、改变根系结构和施用IAA可有效提高烟草的耐盐性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Physiological and Molecular Responses to Salinity in Two Tobacco (Nicotiana tabacum L.) Varieties

This study compared the salt tolerance of two tobacco varieties with different salt tolerances during the germination period—Basma (Oriental tobacco) and K326 (flue-cured tobacco)—under NaCl stress. Basma exhibited higher antioxidant enzyme activity (1.16–3.58 times that of K326), reduced O 2 $$ {\mathrm{O}}_2^{-} $$ levels by 16.5% during the peak accumulation of reactive oxygen species (ROS) and effectively regulated ion homeostasis by upregulating NtSOS1, reducing Na+ accumulation in aboveground tissues by 21.01–22.90 times and in underground tissues by 12.84–14.15 times compared to K326. Additionally, Basma increased the indole-3-acetic acid (IAA) content in underground tissues by 1.5 times after 72 h of saline stress, a change supported by increased expression of NtPIN4. In summary, Basma demonstrated greater salt tolerance than K326 by increasing antioxidant enzyme activity, regulating ion homeostasis and maintaining IAA balance. These findings suggest that enhancing ROS scavenging, modifying root structure and applying IAA can effectively enhance salt tolerance in tobacco cultivation.

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来源期刊
Journal of Agronomy and Crop Science
Journal of Agronomy and Crop Science 农林科学-农艺学
CiteScore
8.20
自引率
5.70%
发文量
54
审稿时长
7.8 months
期刊介绍: The effects of stress on crop production of agricultural cultivated plants will grow to paramount importance in the 21st century, and the Journal of Agronomy and Crop Science aims to assist in understanding these challenges. In this context, stress refers to extreme conditions under which crops and forages grow. The journal publishes original papers and reviews on the general and special science of abiotic plant stress. Specific topics include: drought, including water-use efficiency, such as salinity, alkaline and acidic stress, extreme temperatures since heat, cold and chilling stress limit the cultivation of crops, flooding and oxidative stress, and means of restricting them. Special attention is on research which have the topic of narrowing the yield gap. The Journal will give preference to field research and studies on plant stress highlighting these subsections. Particular regard is given to application-oriented basic research and applied research. The application of the scientific principles of agricultural crop experimentation is an essential prerequisite for the publication. Studies based on field experiments must show that they have been repeated (at least three times) on the same organism or have been conducted on several different varieties.
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