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  • Open Access


    Effects of Allelochemicals on Root Growth and Pod Yield in Response to Continuous Cropping Obstacle of Peanut

    Zhaohui Tang1,2,3, Feng Guo1,2,3, Li Cui1,2,3, Qingkai Li4, Jialei Zhang1,2,3, Jianguo Wang1,2,3, Sha Yang1,2,3, Jingjing Meng1,2,3, Xinguo Li1,2,3, Ping Liu2,3,5,*, Shubo Wan1,2,3,*

    Phyton-International Journal of Experimental Botany, Vol.92, No.1, pp. 17-34, 2023, DOI:10.32604/phyton.2022.022405


    Continuous cropping (CC) obstacle is a major threat in legume crops production; however, the underlying mechanisms concerning the roles allelochemicals play in CC obstacle are poorly understood. The current 2-year study was conducted to investigate the effects of different kinds and concentrations of allelochemicals, p-hydroxybenzoic acid (H), cinnamic acid (C), phthalic acid (P), and their mixtures (M) on peanut root growth and productivity in response to CC obstacle. Treatment with H, C, P, and M significantly decreased the plant height, dry weight of the leaves and stems, number of branches, and length of the lateral stem compared with control. Exogenous… More >

  • Open Access


    Titanium Dioxide Nanoparticles Promote Root Growth by Interfering with Auxin Pathways in Arabidopsis thaliana

    Jiali Wei*, Ying Zou, Ping Li, Xiaojun Yuan

    Phyton-International Journal of Experimental Botany, Vol.89, No.4, pp. 883-891, 2020, DOI:10.32604/phyton.2020.010973

    Abstract TiO2 nanoparticles (nano-TiO2) are widely used in the world, and a considerable amount of nano-TiO2 is released into the environment, with toxic effects on organisms. In the various species of higher plants, growth, including seed germination, root elongation, and biomass accumulation, is affected by nano-TiO2. However, the underlying molecular mechanisms remain to be elucidated. In this study, we observed that nano-TiO2 promoted root elongation in a dose-dependent manner. Furthermore, we found that nano-TiO2 elevated auxin accumulation in the root tips of the auxin marker lines DII-VENUS and DR5:: GUS, and, correspondingly, quantitative real-time PCR analysis revealed that nano-TiO2 increased the… More >

  • Open Access


    Phytosulfokine-α Promotes Root Growth by Repressing Expression of Pectin Methylesterase Inhibitor (PMEI) Genes in Medicago truncatula

    Liangliang Yu*, Wenjun Zhou, Danping Zhang, Junhui Yan, Li Luo

    Phyton-International Journal of Experimental Botany, Vol.89, No.4, pp. 873-881, 2020, DOI:10.32604/phyton.2020.011882

    Abstract Phytosulfokine-α (PSK-α), a sulfated pentapeptide with the sequence YIYTQ, is encoded by a small precursor gene family in Arabidopsis. PSK-α regulates multiple growth and developmental processes as a novel peptide hormone. Despite its importance, functions of PSK-α in M. truncatula growth remains unknown. In this study, we identified five genes to encode PSK-α precursors in M. truncatula. All of these precursors possess conserved PSK-α signature motif. Expression pattern analysis of these MtPSK genes revealed that each gene was expressed in a tissue-specific or ubiquitous pattern and three of them were remarkably expressed in root. Treatment of M. truncatula seedlings with… More >

  • Open Access


    Chromium Differentially Affects Hydrogen Peroxide Distribution in Primary and Adventitious Roots of Arabidopsis thaliana L.

    Aarón Giovanni Munguía-Rodríguez1,2, José López-Bucio1, Gerardo Rangel Sánchez1,2, León Francisco Ruiz-Herrera1, Yazmín Carreón-Abud2, Miguel Martínez-Trujillo2,*

    Phyton-International Journal of Experimental Botany, Vol.89, No.1, pp. 35-43, 2020, DOI:10.32604/phyton.2020.07835

    Abstract The post-embryonic growth of the Arabidopsis thaliana root system can be modified by different types of stress, such as sublethal concentrations of metals, which may induce the production of reactive oxygen species (ROS). In this study, the effects of different concentrations of potassium chromate (KCrO4) on the distribution and relative quantity of hydrogen peroxide (H2O2) were determined in primary and adventitious roots in A. thaliana HyPer line seedlings. This line has a biosensor that specifically reports H2O2 levels within tissues as fluorescence. Primary root growth was inhibited at 100 μM Cr (VI); in contrast, adventitious root formation was induced over… More >

  • Open Access


    Effects of cadmium on root growth, cell division and micronuclei formation in root tip cells of Allium cepa var. agrogarum L.

    Wang QL, LT Zhang, JH Zou, DH Liu, JY Yue

    Phyton-International Journal of Experimental Botany, Vol.83, pp. 291-298, 2014, DOI:10.32604/phyton.2014.83.291

    Abstract The effects of various cadmium (Cd) concentrations (10, 50 and 100 μM) on root growth, cell division and micronuclei formation in root tip cells of Allium cepa var. agrogarum L. were investigated to better understand the processes of Cd-induced apoptosis. The results indicated that 10 μM of Cd had an obviously passive influence on root growth during the 24 h treatment, and that the influence was even more serious with increasing Cd concentrations and duration of treatments. The mitotic index decreased with increasing Cd concentration and duration of treatments. Cadmium induced c-mitosis, chromosome bridges, chromosome stickiness and micronuclei. The frequency… More >

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