5 research outputs found

    干旱胁迫下复苏植物牛耳草基因组DNA甲基化分析

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    利用甲基化敏感扩增多态性(methylation sensitive amplified polymorphism,MSAP)技术,研究干旱复苏过程中,牛耳草叶片DNA甲基化水平及动态变化情况.5对引物对共扩增出376个CCGG位点,其中188个位点发生了甲基化或去甲基化变化.处理组总甲基化水平均高于对照组,且均以Ⅰ型CHG(半甲基化)位点为主,占约32.3%~40.2%.牛耳草干旱复苏过程DNA甲基化和去甲基化同时发生,但以去甲基化为主.此外,qRT-PCR技术检测Bh Dnmt2、Bh CMT2等DNA甲基化相关酶基因在干旱复苏过程中的表达,发现均有明显变化.综上,DNA甲基化参与了牛耳草的抗旱复苏过程,可能是通过甲基化/去甲基化调节基因表达,从而参与牛耳草的抗旱分子反应

    玉米圆斑病菌侵染体系的建立

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    以玉米自交系B73作为研究对象,以玉米圆斑病菌为供试菌株,采取玉米离体叶片侵染与活体整株侵染相对比的方式,通过观察侵染早期不同时间的玉米叶片,测定相关POD酶活性及相关基因表达量变化等,对侵染早期玉米叶片的生理指标和分子指标进行研究,通过比较这2种接菌方式对玉米早期生理生化表型的的影响,来筛选一种较为便捷实用的试验方法。结果表明,离体叶片侵染体系与活体植株侵染在侵染初期所选取的各种生理生化指标方面变化无差异;离体叶片侵染体系具有操作简单、重复性高、节约时间的优点,可以作为整株侵染的替代体系,为研究早期调控提供试验手段

    Measurement of integrated luminosity of data collected at 3.773 GeV by BESIII from 2021 to 2024*

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    Determination of the number of ψ(3686) events taken at BESIII

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    The number of ψ(3686) events collected by the BESIII detector during the 2021 run period is determined to be (2259.3±11.1)×106 by counting inclusive ψ(3686) hadronic events. The uncertainty is systematic and the statistical uncertainty is negligible. Meanwhile, the numbers of ψ(3686) events collected during the 2009 and 2012 run periods are updated to be (107.7±0.6)×106 and (345.4±2.6)×106, respectively. Both numbers are consistent with the previous measurements within one standard deviation. The total number of ψ(3686) events in the three data samples is (2712.4±14.3)×10^

    Amplitude analysis of the decays D0π+ππ+πD^0\rightarrow\pi^+\pi^-\pi^+\pi^- and D0π+ππ0π0D^0\rightarrow\pi^+\pi^-\pi^0\pi0

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