β西柏三烯二醇对拟南芥的化感效应及其作用机理研究
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国家自然科学基金(31070386,21302195,31300290);


Allelopathic Effect and Mechanism of βcembrenediol on the Growth of Arabidopsis thaliana
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    摘要:

    以拟南芥幼苗为受体植物,研究了不同浓度二萜类化合物β西柏三烯二醇对拟南芥生长的活性作用以及作用机理,以揭示萜类化感物质的作用机制。结果表明:(1)β西柏三烯二醇对拟南芥幼苗的鲜重具有显著抑制作用,当处理浓度为50 μmol/L时抑制作用达到显著水平,并对拟南芥鲜重的抑制率均大于30%。(2)经过β西柏三烯二醇处理后,拟南芥叶片中叶绿素a、b含量显著下降,且抑制作用随处理浓度的增大和处理时间的延长而增加。(3)随着β西柏三烯二醇处理浓度的增大,拟南芥中过氧化物酶(POD)和超氧化物歧化酶(SOD)的活性逐渐显著降低,而过氧化产物MDA含量显著增加。可见,β西柏三烯二醇通过抑制拟南芥体内抗氧化酶的活性,引起膜脂过氧化,从而抑制拟南芥幼苗的正常生长和生理过程,且这种抑制作用随浓度的升高而增强。

    Abstract:

    In this study, we investigated the allelopathic effects of βcembrenediol and its phytotoxic mechanism on Arabidopsis thaliana seedlings. The results showed that: (1) βcembrenediol significantly reduced fresh weight of A. thaliana. The fresh weight of A. thaliana seedlings treated with the compound at high concentrations (50 μmol/L) was reduced more than 30% compared to the control; (2) After βcembrenediol treatment, the levels of chl a, b in A. thaliana leaves both declined in a concentrationdependent and timedependent manner;(3) βcembrenediol inhibited the activities of POD and SOD, while increased the content of MDA. These results indicated that under the stress of βcembrenediol, the activities of enzyme were inhibited and the degree of membrane lipid peroxidation was strengthened, and chlorophyll content was decreased, ultimately resulted in growth inhibition of A. thaliana seedlings.

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任 夏,燕志强,金 辉,等.β西柏三烯二醇对拟南芥的化感效应及其作用机理研究[J].西北植物学报,2017,37(4):713-718

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  • 在线发布日期: 2017-05-05
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