Results 21 to 30 of about 19,100 (167)
Reactive oxygen species act as signaling molecules to control root hair initiation and tip growth
New Phytologist, Volume 247, Issue 5, Page 2042-2048, September 2025.Summary Root hairs (RHs) increase the surface area of roots, facilitating nutrient and water uptake and plant anchorage. RHs form from root epidermal cells and elongate by polar tip growth. Reactive oxygen species (ROS) have recently been implicated as important signals that drive RH formation and elongation using both genetic and imaging approaches ...
Megan E. Gerber +2 more
wiley +1 more source
Shuitu Baochi Xuebao, 2019 采用土培盆栽试验，研究了在铅污染土壤中添加叶绿醇对土壤酶活性和土壤铅离子有效态的影响，探讨了不同处理时间下叶绿醇对铅污染土壤的缓解作用。结果表明：短时间内在土壤中添加叶绿醇对土壤过氧化氢酶、蔗糖酶和碱性磷酸酶活性具有促进作用，对土壤脲酶活性具有抑制作用，且每种酶对叶绿醇的敏感程度不同，其中碱性磷酸酶最为敏感；随着处理时间延长土壤中过氧化氢酶活性、脲酶活性和铅离子有效态降低，蔗糖酶活性和碱性磷酸酶活性显著升高；土壤重金属铅浓度为600 mg/kg时，叶绿醇浓度为50 mg/kg蔗糖酶活性最强 ...
于培鑫, 潘芳慧, 王友保, 李晶
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Functional Ecology, Volume 39, Issue 8, Page 2149-2169, August 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract Plants assemble beneficial rhizosphere microbiomes through a ‘cry for help’ mechanism upon pathogen or insect herbivore attack. The arbuscular mycorrhizal fungi (AMF) can influence the composition of microbial communities in the plant rhizosphere. However, their impacts
Yingde Li +6 more
wiley +1 more source
Shuitu Baochi Xuebao, 2008 对松嫩平原西部退化盐碱草地土壤过氧化氢酶、过氧化物酶、多酚氧化酶、蛋白酶、转化酶及碱性磷酸酶活性的季节动态进行研究,结果表明:土壤过氧化物酶、蛋白酶和转化酶活性在碱斑及不同退化程度盐碱草地中的季节变化趋势不同,而过氧化氢酶、多酚氧化酶和碱性磷酸酶活性的季节变化趋势基本一致,其峰值出现在8月或9月;在不同退化程度的盐碱草地中,各种酶活性的季节变化幅度不同,过氧化氢酶、多酚氧化酶和碱性磷酸酶活性在中度、重度盐碱化草地中的变化幅度大于轻度盐碱化草地,而过氧化物酶、蛋白酶和转化酶活性在中度 ...
YUE, WANG, WANG, YAN
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Pyruvate kinase M2 inhibits cisplatin induced caspase-dependent apoptosis via ERK-mediated signaling pathway in hepatocellular carcinoma cells [PDF]
, 2016 M2型丙酮酸激酶（pyruvatekinaseisoenzymetypeM2，PKM2）在肿瘤代谢 和生长等方面发挥重要作用。此外，PKM2还可作为蛋白激酶及辅助转录因子， 调控相关基因的转录表达，促进肿瘤细胞的增殖。我们实验室前期已经证实了 PKM2在肝细胞癌中高表达，并通过EGF/EGFR及TGFβ/TGFβR信号通路调控 肝癌细胞的迁移、侵袭。本课题研究目的在于进一步探索PKM2在肝癌细胞增 殖与凋亡方面的调控作用及相关分子生物学机制。 采用短发夹RNA转染HepG2和Huh7两株肝癌细胞株 ...
谌小春
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Veterinary Dermatology, Volume 36, Issue 3, Page 302-313, June 2025.Background – Malassezia pachydermatis (MP) is implicated in severe dermatitis and otitis externa (OE) of companion animals and recently gained attention for its increasing resistance to azole compounds. For this reason, developing novel therapeutic strategies is of great interest. In a previous work, we used reference yeast isolates to evaluate several
Costanza Spadini +11 more
wiley +1 more source
Shuitu Baochi Xuebao, 2006 采用回归正交设计方案，研究了Cd、Cu、Ni复合污染对6种土壤酶（脲酶、转化酶、蛋白酶、磷酸酶、过氧化氢酶、脱氢酶）活性的影响。结果表明：6种土壤酶活性与Cd，Cu，Ni复合污染之间均呈显著或极显著的相关关系，但Cd，Cu，Ni复合污染对各种土壤酶活性的影响存在着明显差异。在复合效应影响中，重金属对土壤酶活性的抑制效应顺序为：Cd〉Cu〉Ni，Cd，Cu对土壤酶的活性多表现为抑制作用，而Ni多表现为激活作用，Cd，Cu，Ni对磷酸酶均表现出一定的激活效应。Cd，Cu ...
罗虹, 刘鹏, 宋小敏
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Interaction of two-component systems in Thermus thermophilus [PDF]
, 2015 目前，细菌产生了许多机制来对抗抗生素药物的使用，这给细菌性疾病的药物治疗带来了巨大的威胁。细菌感知外界环境压力的其中一个机制就是运用双组分信号转导系统（TCSs）来响应外界刺激。一个TCS一般包含两个组分：组氨酸激酶（HK）和调节应答蛋白（RR）。HK可以感知各种各样的信号，并通过改变它对应的RR的磷酸化水平来调控RR的活性，大部分磷酸化的RR接下来介导转录水平的调控。由于哺乳动物体内不含TCSs，所以TCSs是新的抗生素药物开发的重要靶点。 在一个TCS中 ...
胡晓婕
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Functional Ecology, Volume 39, Issue 5, Page 1274-1287, May 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract Interactions between plants and soil microorganisms in the rhizosphere are vital for maintaining the nutrient cycle and stability of terrestrial ecosystems. Nitrogen, closely related to carbon (C) cycling and ecosystem productivity, undergoes transformation by soil ...
Ru Wang +9 more
wiley +1 more source
Shuitu Baochi Xuebao, 2011 在黑龙江省内选取9个典型黑土剖面,研究其土壤过氧化氢酶、磷酸酶、脲酶、转化酶、硝酸还原酶活性的剖面分布规律。结果表明:在0-40 cm土层中,黑土5种酶活性都随土壤层次的加深而下降,而在40cm以下的土层中,过氧化氢酶、硝酸还原酶、转化酶活性不再降低,趋于稳定或略有升高,磷酸酶和脲酶活性却急剧降低,甚至没有酶活性;相关分析表明,土壤过氧化氢酶、磷酸酶、脲酶、硝酸还原酶活性和土壤全氮、速效氮、全磷、全钾、全碳含量及C/N显著相关,土壤转化酶活性和土壤全氮、速效氮、全钾、速效钾、全碳含量显著相关 ...
岳中辉 +5 more
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