Jinfeng Qi

Kunming Institute of Botany

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Jianqiang Wu

Anhui Agricultural University

Christian Hettenhausen

Riemser Pharma (Germany)

Yuxing Xu

Union Hospital

Jingxiong Zhang

Kunming Institute of Botany

Jing Li

Shanxi Agricultural University

Saif Ul Malook

University of Florida

Chengkai Lu

Chinese Academy of Sciences

Lei Wang

Chinese Academy of Sciences

H. K. Lv

Chinese Academy of Sciences

X. D. Sheng

Institute of High Energy Physics

Cooperative Institutions

Chinese Academy of Sciences

653

Institute of High Energy Physics

392

University of Chinese Academy of Sciences

287

University of Science and Technology of China

168

Campbell Collaboration

137

Southwest Jiaotong University

132

Gansu Great Wall Electrical and Electronics Engineering Research Institute

126

Purple Mountain Observatory

105

Nanjing University

Shandong University

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Measurements of All-Particle Energy Spectrum and Mean Logarithmic Mass of Cosmic Rays from 0.3 to 30 PeV with LHAASO-KM2A

Physical Review Letters (2024)

Z. Cao F. Aharonian Axikegu Y. X. Bai Y. W. Bao

We present the measurements of all-particle energy spectrum and mean logarithmic mass of cosmic rays in the energy range of 0.3-30 PeV using data collected from LHAASO-KM2A between September 2021 and December 2022, which is based on a nearly composition-independent energy reconstruction method, achieving unprecedented accuracy. Our analysis reveals the position of the knee at 3.67±0.05±0.15 PeV. Below the knee, the spectral index is found to be -2.7413±0.0004±0.0050, while above the knee, it is -3.128±0.005±0.027, with the sharpness of the transition measured with a statistical error of 2%. The mean logarithmic mass of cosmic rays is almost heavier than helium in the whole measured energy range. It decreases from 1.7 at 0.3 PeV to 1.3 at 3 PeV, representing a 24% decline following a power law with an index of -0.1200±0.0003±0.0341. This is equivalent to an increase in abundance of light components. Above the knee, the mean logarithmic mass exhibits a power law trend towards heavier components, which is reversal to the behavior observed in the all-particle energy spectrum. Additionally, the knee position and the change in power-law index are approximately the same. These findings suggest that the knee observed in the all-particle spectrum corresponds to the knee of the light component, rather than the medium-heavy components.

Spectral index

Logarithmic mean

Particle (ecology)

10.1103/physrevlett.132.131002

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Citations (12)

Transcriptomic Responses of Fall Armyworms (Spodoptera frugiperda) Feeding on a Resistant Maize Inbred Line Xi502 with High Benzoxazinoid Content

Agronomy (2021)

Saif Ul Malook Xiaofeng Liu Cai-Yan Ma Jinfeng Qi Wende Liu

The fall armyworm (Spodoptera frugiperda) is a devastating invasive insect herbivore. Its success on its preferred host plant, maize (Zea mays), is supported by numerous specialized detoxification mechanisms that suppress the defense responses of maize. In this study, we used a resistant Chinese maize cultivar, Xi502, which showed slower growth and lower yield-related phenotypes compare with maize inbred line B73. Comparative transcriptomic analyses demonstrated that B73-fed fall armyworm larvae have a significantly faster transcriptomic re-configuration toward maturation compared to their siblings fed with Xi502 leaves, whereas a number of putative aromatic breakdown -related DEGs were specifically induced when feeding on Xi502. Targeted metabolomic quantification demonstrated that Xi502 contains significantly higher levels of various benzoxazinoid compounds. Artificial feeding with the structural analog of a benzoxazinoid compound preferentially accumulated in Xi502 demonstrated a significant growth inhibition effect on FAW larvae. These results provide important genetic material and preliminary evidence for further dissection of the FAW-resistance mechanism in maize.

Fall armyworm

Inbred strain

10.3390/agronomy11122503

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Citations (4)

Maize resistance to witchweed through changes in strigolactone biosynthesis

Science (2023)

Changsheng Li Lemeng Dong Janani Durairaj Jiahn‐Chou Guan Masahiko Yoshimura

Maize (Zea mays) is a major staple crop in Africa, where its yield and the livelihood of millions are compromised by the parasitic witchweed Striga. Germination of Striga is induced by strigolactones exuded from maize roots into the rhizosphere. In a maize germplasm collection, we identified two strigolactones, zealactol and zealactonoic acid, which stimulate less Striga germination than the major maize strigolactone, zealactone. We then showed that a single cytochrome P450, ZmCYP706C37, catalyzes a series of oxidative steps in the maize-strigolactone biosynthetic pathway. Reduction in activity of this enzyme and two others involved in the pathway, ZmMAX1b and ZmCLAMT1, can change strigolactone composition and reduce Striga germination and infection. These results offer prospects for breeding Striga-resistant maize.

Strigolactone

Striga hermonthica

Germ plasm

10.1126/science.abq4775

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Citations (44)

Extensive Inter-plant Protein Transfer between Cuscuta Parasites and Their Host Plants

Molecular Plant (2019)

Nian Liu Guojing Shen Yuxing Xu Hui Liu Jingxiong Zhang

Cuscuta

Parasitic plant

Proteome

10.1016/j.molp.2019.12.002

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Citations (71)

Stem parasitic plant Cuscuta australis (dodder) transfers herbivory-induced signals among plants

Proceedings of the National Academy of Sciences (2017)

Christian Hettenhausen Juan Li Huifu Zhuang Huan-Huan Sun Yuxing Xu

Significance Cuscuta spp. (i.e., dodders) are plant parasites that connect to the vasculature of their host plants to extract water, nutrients, and even macromolecules. Knowledge of ecologically meaningful communications between host plants and Cuscuta , or between Cuscuta bridge-connected hosts, has remained obscure until now. Here we show that herbivore attack on one of the Cuscuta bridge-connected plants induces gene expression and increases the activity of trypsin proteinase inhibitors, and thus elevates the resistance to insects in other undamaged but Cuscuta -connected plants. This Cuscuta -mediated interplant signaling is rapid, conserved, far-reaching, and partly requires the plant hormone jasmonic acid. Although Cuscuta parasites can negatively influence their host plants, under certain circumstances, they may also provide ecologically relevant information-based benefits.

Cuscuta

Parasitic plant

10.1073/pnas.1704536114

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Citations (70)

A re-evaluation of dilution for eliminating PCR inhibition in soil DNA samples

Soil Biology and Biochemistry (2016)

Hang Wang Jinfeng Qi Derong Xiao Zhibao Wang Kun Tian

Dilution

Serial dilution

10.1016/j.soilbio.2016.12.011

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Citations (48)

Ultraviolet-B enhances the resistance of multiple plant species to lepidopteran insect herbivory through the jasmonic acid pathway

Scientific Reports (2018)

Jinfeng Qi Mou Zhang Chengkai Lu Christian Hettenhausen Qing Tan

Abstract Land plants protect themselves from ultraviolet-B (UV-B) by accumulating UV-absorbing metabolites, which may also function as anti-insect toxins. Previous studies have shown that UV-B enhances the resistance of different plant species to pierce-sucking pests; however, whether and how UV-B influences plant defense against chewing caterpillars are not well understood. Here we show that UV-B treatment increased Spodoptera litura herbivory-induced jasmonic acid (JA) production in Arabidopsis and thereby Arabidopsis exhibited elevated resistance to S . litura . Using mutants impaired in the biosynthesis of JA and the defensive metabolites glucosinolates (GSs), we show that the UV-B-induced resistance to S . litura is dependent on the JA-regulated GSs and an unidentified anti-insect metabolite(s). Similarly, UV-B treatment also enhanced the levels of JA-isoleucine conjugate and defense-related secondary metabolites in tobacco, rice, and maize after these plants were treated with simulated herbivory of lepidopteran insects; consistently, these plants showed elevated resistance to insect larvae. Using transgenic plants impaired in JA biosynthesis or signaling, we further demonstrate that the UV-B-enhanced defense responses also require the JA pathway in tobacco and rice. Our findings reveal a likely conserved JA-dependent mechanism by which UV-B enhances plant defense against lepidopteran insects.

Jasmonic acid

Spodoptera litura

Helicoverpa zea

Secondary metabolite

10.1038/s41598-017-18600-7

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Citations (53)

Deep view of composite SNR CTA1 with LHAASO in γ-rays up to 300 TeV

Science China Physics Mechanics and Astronomy (2025)

Zhen Cao F. Aharonian Axikegu Y. X. Bai Y. W. Bao

10.1007/s11433-024-2479-4

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