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  • Open Access

    ARTICLE

    GhSCL4 Acts as a Positive Regulator in Both Transgenic Arabidopsis and Cotton during Salt Stress

    Yanyan Zhao1,*, Yanpeng Ding2, Bailin Duan1, Qingzhou Xie1

    Phyton-International Journal of Experimental Botany, Vol.92, No.1, pp. 1-15, 2023, DOI:10.32604/phyton.2022.022384

    Abstract GRAS transcription factors play important roles in plant abiotic stress response, but their characteristics and functions in cotton have not been fully investigated. A cotton SCL4/7 subgroup gene in the GRAS family, GhSCL4, was found to be induced by NaCl treatments. Nuclear localization and transactivation activity of GhSCL4 indicate its potential role in transcriptional regulation. Transgenic Arabidopsis thaliana over-expressing GhSCL4 showed enhanced resistance to salt and osmotic stress. What’s more, the transcript levels of salt stress-induced genes (AtNHX1 and AtSOS1) and oxidation-related genes (AtAPX3 and AtCSD2) were more highly induced in the GhSCL4 over-expression lines than in wild type after… More >

  • Open Access

    ARTICLE

    Participation of Auxin Transport in the Early Response of the Arabidopsis Root System to Inoculation with Azospirillum brasilense

    Elizabeth Carrillo-Flores1, Jonanci Arreola-Rivera1, Denní Mariana Pazos-Solís2, Moisés Bocanegra-Mondragón2, Grisel Fierro-Romero3, Ma. Elena Mellado-Rojas1, Elda Beltrán-Peña1,*

    Phyton-International Journal of Experimental Botany, Vol.91, No.11, pp. 2383-2401, 2022, DOI:10.32604/phyton.2022.021507

    Abstract The potential of Plant Growth Promoting Rhizobacteria (PGPR) has been demonstrated in the case of plant inoculation with bacteria of the genus Azospirillum which improves yield. A. brasilense produces a wide variety of molecules, including the natural auxin indole-3-acetic acid (IAA), as well as other phytoregulators. However, several studies have suggested that auxin induces changes in plant development during their interaction with the bacteria. The effects of A. brasilense Sp245 on the development of Arabidopsis thaliana root were investigated to help explain the molecular basis of the interaction. The results obtained showed a decrease in primary root length from the… More >

  • Open Access

    ARTICLE

    Allantoin Alleviates Seed Germination Thermoinhibition in Arabidopsis

    Songbei Ying, Sasa Jing, Leheng Cheng, Haiqing Sun, Yuan Tian, Lulu Zhi, Ping Li*

    Phyton-International Journal of Experimental Botany, Vol.91, No.9, pp. 1893-1904, 2022, DOI:10.32604/phyton.2022.022679

    Abstract Allantoin as the metabolite of purine catabolism can store and remobilize nitrogen for plant growth and development. However, emerging evidence suggests it also contributes to plant tolerance to stress response through altering abscisic acid (ABA) and reducing reactive oxygen species (ROS) level. 1-CYS PEROXIREDOXIN (PER1) is a seed-specific antioxidant that enhances seed longevity through scavenging ROS over-accumulation. High temperature (HT) suppresses seed germination and induces seed secondary dormancy, called as seed germination thermoinhibition. However, the mechanism that allantoin and PER1 regulate seed germination thermoinhibition remains unknown. In this study, we reported that allantoin treatment enhances seed germination under HT stress.… More >

  • Open Access

    ARTICLE

    Overexpression of rice F-box phloem protein gene OsPP12-A13 confers salinity tolerance in Arabidopsis

    CHUNKUN FAN, YONGPENG ZHANG, CHUNBAO YANG, YAWEI TANG, JI QU, BU JIE, DEJI QUZHEN, LIYUN GAO*

    BIOCELL, Vol.45, No.4, pp. 1121-1135, 2021, DOI:10.32604/biocell.2021.014336

    Abstract Salinity is a serious challenge for agriculture production by limiting the arable land. Rice is a major staple food crop but very sensitive to salt stress. In this study, we used Arabidopsis for the functional characterization of a rice F-box gene LOC_Os04g48270 (OsPP12-A13) under salinity stress. OsPP12-A13 is a nuclear-localized protein that is strongly upregulated under salinity stress in rice and showed the highest expression in the stem, followed by roots and leaves. Two types of transgenic lines for OsPP12-A13 were generated, including constitutive tissue over-expression using the CaMV35S promoter and phloem specific over-expression using the pSUC2 promoter. Both types… More >

  • Open Access

    ARTICLE

    The Potassium Transporter AtKUP12 Enhances Tolerance to Salt Stress through the Maintenance of the K+/Na+ Ratio in Arabidopsis

    Hua Zhang#, Zhongmin Yang#, Xilong You, Youqiang Heng, Yan Wang*

    Phyton-International Journal of Experimental Botany, Vol.90, No.2, pp. 389-402, 2021, DOI:10.32604/phyton.2021.014156

    Abstract Potassium (K+) is a necessary nutrient for plant growth and crop production. The K+ transporter plays crucial roles in the absorption and transport of K+ in plants. Most K+ transporters in Arabidopsis have been reported, but AtKUP12, which is a member of the KT/KUP/HAK family, has not yet been the subject of relevant in-depth research. In the present study, we demonstrated that AtKUP12 plays a crucial role in K+ uptake in Arabidopsis under 100 μM lowK+ and 125 mM salt stress conditions. AtKUP12 transcripts were induced by K+ deficiency and salt stress. We analyzed the K+ uptake of AtKUP12 using… More >

  • Open Access

    ARTICLE

    The importance of Arabidopsis seed mutants in the elucidation of the molecular basis of Endosperm Balance Number in tuberbearing Solanum species

    P. CORNEJO*, E.L. CAMADRO**, R.W. MASUELLI*

    BIOCELL, Vol.30, No.3, pp. 413-421, 2006, DOI:10.32604/biocell.2006.30.413

    Abstract The Endosperm Balance Number (EBN) is an important concept for potato breeding and has evolutionary importance in tuber-bearing Solanum species. The EBN is part of the post-zygotic hybridization barriers in the group and represents a reproductive isolating mechanism. Few genes have been proposed to be involved in its genetic control; until now, however, neither specific genes nor its molecular basis have been well established. Histological observations of embryo and endosperm development in inter-EBN crosses in tuber-bearing Solanum revealed phenotypes similar to those recently described in Arabidopsis seed mutants. The common feature between them is that the endosperm nuclei become greatly… More >

  • Open Access

    ARTICLE

    Quantitative trait loci associated with water deficit tolerance in Arabidopsis thaliana (L.) Heynh.

    Gutiérrez-Díez A1, GE Salinas-García1, L Iracheta-Donjuan2, JA Torres-Castillo1, N Mayek-Pérez3

    Phyton-International Journal of Experimental Botany, Vol.82, pp. 203-208, 2013, DOI:10.32604/phyton.2013.82.203

    Abstract Gene and quantitative trait loci (QTLs) localization in a model species allow to know their organization in the genome, and the possibility for the isolation and cloning of genes with agronomic importance. Seventy-three recombinant inbred lines (RILs) derived from the cross of Arabidopsis thaliana (L.) Heynh. ecotypes Columbia (Col) x Landsberg erecta (Ler) were grown in a greenhouse under contrasting soil moisture conditions (irrigated and water deficits). During their growth, some phenological (days to flowering) and plant growth traits (plant height, and number of nodes and leaves per plant) were measured. Significant differences for plant height and nodes per plant… More >

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