Effects of Artificial Aging on Seed Vigor and Physiological Characteristics of the Invasive Alien Plant Aegilops tauschii

IF 1.1 4区 生物学 Q3 PLANT SCIENCES Acta Societatis Botanicorum Poloniae Pub Date : 2021-11-15 DOI:10.5586/asbp.9010
Ning Wang, M. Yuan, Hao Chen
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引用次数: 1

Abstract

The control of invasive plants depends to some extent on the persistence of the soil seed bank. The high temperature (40 °C) accompanied with high humidity (95%) method was used to treat the seeds of the invasive species Aegilops tauschii Coss. The aim of our study was to evaluate the seed vigor and longevity by accelerating aging, to serve as a reference for the evaluation of invasion potential of A. tauschii and corresponding eradication strategy adoption. The results showed that with the extension of aging time, the germination rate (GR), energy (GE), and index (GI) of A. tauschii seeds reduced. All the results were significantly different from the control (CK) since the second day ( p < 0.05). During the aging process, the seed relative water content (RWC), relative electric conductivity (REC), and thiobarbituric acid (TBARS) level increased, while the superoxide dismutase (SOD) gradually decreased after second day of seed aging. In addition, the aging treatment also caused a continuous decrease in the endogenous gibberellin (GA 3 ) content and a continuous increase in the abscisic acid (ABA) content of the seeds. Thus, a sharp decrease in the GA 3 /ABA ratio was evident. Finally, the study revealed that the germination inhibitors of A. tauschii were mainly concentrated in the glumes, which was revealed during seed aging. The results of the comprehensive analysis indicated that the changes of the above-mentioned internal factors eventually led to a rapid decline of the seed vigor of A. tauschii . Based on the results of the aging test, and the distribution characteristics of A. tauschii seeds in the soil seed banks, we recommend that soil solarization is one of the effective methods to eradicate the seed bank of A. tauschii .
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人工老化对外来入侵植物灰山羊草种子活力及生理特性的影响
入侵植物的控制在一定程度上取决于土壤种子库的持久性。采用高温(40℃)加高湿(95%)的方法处理入侵种黄颡鱼(Aegilops tauschii Coss)种子。本研究的目的是通过加速老化的方法来评价黄斑田鼠种子的活力和寿命,为评估黄斑田鼠的入侵潜力和采取相应的根除策略提供参考。结果表明,随着陈化时间的延长,黄豆种子的发芽率(GR)、能量(GE)和指数(GI)均有所降低。从第2 d开始,所有结果均与对照(CK)差异显著(p < 0.05)。在老化过程中,种子相对含水量(RWC)、相对电导率(REC)和硫代巴比妥酸(TBARS)水平升高,而超氧化物歧化酶(SOD)在老化第2天后逐渐降低。此外,老化处理还导致种子内源赤霉素(GA 3)含量持续降低,脱落酸(ABA)含量持续升高。因此,GA 3 /ABA比值明显下降。最后,研究表明,黄芪萌发抑制因子主要集中在颖片中,这在种子老化过程中得到了体现。综合分析结果表明,上述内部因素的变化最终导致了牛头草种子活力的快速下降。根据老化试验的结果,结合黄豆种子在土壤种子库中的分布特点,认为土壤日晒是根治黄豆种子库的有效方法之一。
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来源期刊
CiteScore
2.00
自引率
10.00%
发文量
18
审稿时长
1 months
期刊介绍: The journal has been published since 1923 and offers Open Access publication of original research papers, short communications, and reviews in all areas of plant science, including evolution, ecology, genetics, plant structure and development, physiology and biochemistry.
期刊最新文献
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