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  • Open Access

    REVIEW

    The Role of Salicylic Acid Signal in Plant Growth, Development and Abiotic Stress

    Yulan Hu1, Lulu Zhi1, Ping Li1, John T. Hancock2, Xiangyang Hu1,*

    Phyton-International Journal of Experimental Botany, Vol.91, No.12, pp. 2591-2605, 2022, DOI:10.32604/phyton.2022.023733

    Abstract In nature, plants are constantly affected by adverse conditions. Unlike animals, plants can resist these adverse stresses only by insisting on their original positions. Stress can be divided into biological stress and abiotic stress, abiotic stress directly affects the growth, development and yield of plants, it spans all developmental stages from seed germination to senescence. In order to adapt to changing environment, plants have evolved well-developed mechanisms that help to perceive the stress signals and enable optimal growth response. Salicylic acid (SA) is an important endogenous signal molecule in plants, which not only regulate some More >

  • Open Access

    ARTICLE

    Enhancement of Ultrasonic Seed Treatment on Yield, Grain Quality Characters, and 2-Acetyl-1-Pyrroline Biosynthesis in Different Fragrant Rice Genotypes

    Rujian Lan1,2,3,#, Meiyang Duan1,2,3,#, Feida Wu1,2,3,#, Rifang Lai1,2,3, Zhaowen Mo1,2,3, Shenggang Pan1,2,3, Xiangru Tang1,2,3,*

    Phyton-International Journal of Experimental Botany, Vol.91, No.11, pp. 2461-2473, 2022, DOI:10.32604/phyton.2022.021884

    Abstract Fragrant rice is popular for the good grain quality and special aroma. The present study conducted a field experiment to investigate the effects of ultrasonic seed treatment on grain yield, quality characters, physiological properties and aroma biosynthesis of different fragrant rice genotypes. The seeds of three fragrant rice genotypes were exposed to 1 min of ultrasonic vibration and then cultivated in paddy field. The results of present study showed that ultrasonic seed treatment increased grain yield of all fragrant rice genotypes but the responses of yield formation to ultrasonic were varied with different genotypes. Compared with More >

  • Open Access

    ARTICLE

    Identification and Characterization of a Novel Yellow Leaf Mutant yl1 in Rice

    Xiaofang Zeng1,#, Guangzheng Li1,#, Nu’an Liu2, Yan Li1, Jianrong Li1, Xiaozhen Huang1, Degang Zhao1,2,,*

    Phyton-International Journal of Experimental Botany, Vol.91, No.11, pp. 2419-2437, 2022, DOI:10.32604/phyton.2022.021199

    Abstract Leaf-color mutants play an important role in the study of chlorophyll metabolism, chloroplast development, and photosynthesis system. In this study, the yellow leaf 1 (yl1) rice mutant was identified from the ethyl methane sulfonate-treated mutant progeny of Lailong, a glutinous japonica rice landrace cultivated in Guizhou Province, China. Results showed that yl1 exhibited yellow leaves with decreased chlorophyll content throughout the growth period. Chloroplast development in the yl1 mutant was disrupted, and the grana lamellae was loosely packed and disordered. RNA sequencing and real-time quantitative polymerase chain reaction (qRT-PCR) analysis revealed that the chlorophyll synthesis-related genes OsCHLH, OsCHLM, OsCHLG, PORB,… More >

  • Open Access

    ARTICLE

    Transcriptomic and Physiological Analyses of Pigment Accumulation in Eucommia ulmoides ‘Hongye’

    Mengjiao Chen1,2, Jinhui Zhai3, Jiajia Zhang1,4,5,6, Hui Li1,2, Xinjiang Niu1,2, Yaxin Liu1,2, Yue Ren1,2, Hongyan Du1,4,5,6, Jingle Zhu1,4,5,6,*

    Phyton-International Journal of Experimental Botany, Vol.91, No.5, pp. 1027-1044, 2022, DOI:10.32604/phyton.2022.019106

    Abstract Eucommia ulmoides ‘Hongye’ is a new ornamental variety of E. ulmoides with excellent red or purple foliage. We found that E. ulmoides ‘Hongye’ exhibited a gradual change from green to red colour under light conditions. However, the colouring mechanism in the leaves of E. ulmoides ‘Hongye’ remains unclear. In this study, we compared the pigment content and leaf colour index of E. ulmoides ‘Hongye’ at five stages with those of E. ulmoides ‘Xiaoye’, which was used as the control variety. The transcriptome sequencing data of the first-period (H1, green) and fifth-period (H5, red) leaves were also analysed and compared. The corresponding… More >

  • Open Access

    REVIEW

    Chlorogenic Acid Metabolism: The Evolution and Roles in Plant Response to Abiotic Stress

    Deka Reine Judesse Soviguidi1,2, Rui Pan1, Yi Liu1,2, Liping Rao1,2, Wenying Zhang1,*, Xinsun Yang2,*

    Phyton-International Journal of Experimental Botany, Vol.91, No.2, pp. 239-255, 2022, DOI:10.32604/phyton.2022.018284

    Abstract During the evolution, plants acquired the ability to synthesize different phenylpropanoid compounds like chlorogenic acid (CGA), which plays vital roles in resistance mechanisms to abiotic stresses. These environmental factors, including heavy metal, cold, heat, ultraviolet (UV) light, drought, and salinity affect the plant physiological processes, resulting in massive losses of agriculture production. As plants evolve from green algae to bryophytes, ferns, gymnosperms and angiosperms, phenylpropanoids are produced and accumulated in different tissues, giving the plant the capacity to counteract the harmful effects of the adverse environments. Studies have been performed on the metabolic evolution of… More >

  • Open Access

    ARTICLE

    Identification of Genes Involved in Celastrol Biosynthesis by Comparative Transcriptome Analysis in Tripterygium wilfordii

    Yaru Zhu1,2,3, Xiujun Zhang1, Yansheng Zhang3, Shiyou Lü1,4,*, Changfu Li1,3,*

    Phyton-International Journal of Experimental Botany, Vol.91, No.2, pp. 279-291, 2022, DOI:10.32604/phyton.2022.017625

    Abstract Tripterygium wilfordii has been renowned mostly because of the anticancer effects of its root extracts, which is partly ascribed to the presence of celastrol, a pentacyclic triterpenoid, as one of the main active components. Celastrol also has recently been reported as an effective prodrug in the treatment of obesity. Despite the promising activities, the pathway leading to celastrol biosynthesis, especially cytochrome P450 (CYP) enzyme(s) that occur in its downstream steps, are largely unknown. This study conducted a comparative analysis of the T. wilfordii transcriptome derived from its root and leaf tissues. Differential gene expression analysis identified a More >

  • Open Access

    ARTICLE

    Biosynthesis of raw starch degrading β-cyclodextrin glycosyltransferase by immobilized cells of Bacillus licheniformis using potato wastewater

    YASSER S. MOSTAFA1,*, SAAD A. ALAMRI1,2, SULIMAN A. ALRUMMAN1, TAREK H. TAHA3, MOHAMED HASHEM1,4, MAHMOUD MOUSTAFA1,5, LAMIAA I. FAHMY6

    BIOCELL, Vol.45, No.6, pp. 1661-1672, 2021, DOI:10.32604/biocell.2021.016193

    Abstract The study was sought to enhance the synthesis of thermal stable β-cyclodextrin glycosyltransferase (β-CGTase) using potato wastewater as a low-cost medium and assess the degree to which it is efficient for industrial production of β-cyclodextrin (β-CD) from raw potato starch. Thermophilic bacteria producing β-CGTase was isolated from Saudi Arabia and the promising strain was identified as Bacillus licheniformis using phylogenetic analysis of the 16S rRNA gene. Alginate-encapsulated cultures exhibited twice-fold of β-CGTase production more than free cells. Scanning electron microscopy (SEM) of polymeric capsules indicated the potential for a longer shelf-life, which promotes the restoration of… More >

  • Open Access

    REVIEW

    Paclobutrazol and Its Use in Fruit Production: A Review

    Laura Raquel Orozco-Meléndez1, Ofelia Adriana Hernández-Rodríguez1, Oscar Cruz-Álvarez1, Loreto Robles-Hernández1, Graciela Dolores Ávila-Quezada1, Esteban Sánchez Chavez2, Damián Aarón Porras-Flores1, Dámaris Leopoldina Ojeda-Barrios1,*

    Phyton-International Journal of Experimental Botany, Vol.91, No.1, pp. 1-12, 2022, DOI:10.32604/phyton.2022.016908

    Abstract There are documentary records referring to paclobutrazol (PBZ) as a growth bioregulator that inhibits the gibberellin synthesis and its application increases yields in fruit and vegetable crop productions. Its agronomic management includes it as an emerging technology to reduce vigour, promote flower induction and flower development in fruit trees with increased economic returns. Its use is banned in some countries because of concerns about residues that can cause harmful effects on the environment. Therefore, the aim of this article was to collect, analyse and summarise relevant information on the use of PBZ in fruit tree… More >

  • Open Access

    REVIEW

    Insights into the Roles of Melatonin in Alleviating Heavy Metal Toxicity in Crop Plants

    Ling Li*,#, Xuyu Yan#

    Phyton-International Journal of Experimental Botany, Vol.90, No.6, pp. 1559-1572, 2021, DOI:10.32604/phyton.2021.016692

    Abstract Alleviating heavy metal pollution in farmland soil, and heavy metal toxicity in plants is the focus of global agricultural environmental research. Melatonin is a kind of indoleamine compound that wide exists in organisms; it is currently known as an endogenous free radical scavenger with the strongest antioxidant effect. As a new plant growth regulator and signaling molecule, melatonin plays an important role in plant resistance to biotic or abiotic stress. Recent studies indicate that melatonin can effectively alleviate heavy metal toxicity in crop plants, which provides a new strategy to minimize heavy metal pollution in… More >

  • Open Access

    ARTICLE

    Physiologic and Transcriptomic Insights into the High Alkali Response of Dunaliella salina

    Jun Zhou, Haiqing Sun, Jiali Wei, Ping Li*

    Phyton-International Journal of Experimental Botany, Vol.90, No.5, pp. 1401-1414, 2021, DOI:10.32604/phyton.2021.016514

    Abstract The halophilic unicellular green alga Dunaliella salina is characterized as the distinct tolerance to high salt in the field. Normally the organism is concurrently subjected with salt and alkali stress, but the feature of D. salina in response to high alkali stress was not investigated before. In this study, we used high pH stress to simulate high alkali stress and found D. salina also showed tolerance to high alkali stress, even grown under pH at 11.0, with high cell density and chlorophyll biosynthesis. High-throughput transcriptome analysis revealed the dramatically different expression of genes associated with nitrogen metabolism, lipid… More >

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