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  • Open Access


    Retrieval of Winter Wheat Canopy Carotenoid Content with Ground- and Airborne-Based Hyperspectral Data

    Ting Cui, Xianfeng Zhou*, Yufeng Huang, Yanting Guo, Yunrui Lin, Leyi Song, Jingcheng Zhang

    Phyton-International Journal of Experimental Botany, Vol.92, No.9, pp. 2633-2648, 2023, DOI:10.32604/phyton.2023.029259

    Abstract Accurate assessment of canopy carotenoid content (CCx+cC) in crops is central to monitor physiological conditions in plants and vegetation stress, and consequently supporting agronomic decisions. However, due to the overlap of absorption peaks of carotenoid (Cx+c) and chlorophyll (Ca), accurate estimation of carotenoid using reflectance where carotenoid absorb is challenging. The objective of present study was to assess CCx+cC in winter wheat (Triticum aestivum L.) with ground- and aircraft-based hyperspectral measurements in the visible and near-infrared spectrum. In-situ hyperspectral reflectance were measured and airborne hyperspectral data were acquired during major growth stages of winter wheat in five consecutive field experiments.… More >

  • Open Access


    Carotenoids: New Applications of “Old” Pigments

    Stefan M. Kolašinac1, Zora P. Dajić Stevanović1,*, Sofija N. Kilibarda1,  Aleksandar Ž. Kostić2,*

    Phyton-International Journal of Experimental Botany, Vol.90, No.4, pp. 1041-1062, 2021, DOI:10.32604/phyton.2021.015996

    Abstract Carotenoids represent a large group of mainly red, orange, and yellow natural metabolites mainly involved in regulation of many metabolic processes. Carotenoids are beneficial for human health. Current study describes the importance, chemical composition and functioning of carotenoids. It is well known that carotenoids support pigments acting in light absorbance mechanisms during photosynthesis, and are known to protect the chlorophyll molecules from oxidative stress and reactive oxygen species (ROS) damage. Carotenoids are involved in signaling processes in plants, responses to environmental stresses, pollination, germination and reproduction, and development regulation. As nutrients of strong antioxidant activity that is primarily linked to… More >

  • Open Access


    Flesh Color Diversity of Sweet Potato: An Overview of the Composition, Functions, Biosynthesis, and Gene Regulation of the Major Pigments

    Hanna Amoanimaa-Dede, Chuntao Su, Akwasi Yeboah, Chunhua Chen, Shaoxia Yang, Hongbo Zhu*, Miao Chen*

    Phyton-International Journal of Experimental Botany, Vol.89, No.4, pp. 805-833, 2020, DOI:10.32604/phyton.2020.011979

    Abstract Sweet potato is a multifunctional root crop and a source of food with many essential nutrients and bioactive compounds. Variations in the flesh color of the diverse sweet potato varieties are attributed to the different phytochemicals and natural pigments they produce. Among them, carotenoids and anthocyanins are the main pigments known for their antioxidant properties which provide a host of health benefits, hence, regarded as a major component of the human diet. In this review, we provide an overview of the major pigments in sweet potato with much emphasis on their biosynthesis, functions, and regulatory control. Moreover, current findings on… More >

  • Open Access


    Carotenoid content, antioxidant capacity and volatile compounds of the aroma during tomato ripening

    López-Vidal1 O, H Escalona-Buendía2, C Pelayo-Zaldívar2, J Cruz-Salazar1, JM Villa-Hernández1, F Rivera-Cabrera1, O Villegas-Torres3, I Alia-Tejacal3, L J Pérez-Flores1, F Díaz de León-Sánchez1

    Phyton-International Journal of Experimental Botany, Vol.83, pp. 185-192, 2014, DOI:10.32604/phyton.2014.83.185

    Abstract During ripening, tomato fruit accumulates high levels of carotenoids. These compounds, besides their function as pigments, nutrients and antioxidants, are precursors of some important volatile compounds for the development of the characteristic aroma of these fruits. In the present work, the antioxidant capacity, lycopene and β-carotene levels, and the production of aromatic substances derived from the carotenoid biosynthetic pathway were analyzed in the tomato cultivar 7705 at different ripening stages. Results showed a significant (p<0.05) increase of lycopene and β-carotene (22.1 and 2.9 fold, respectively) from the mature green to the breaker stage. Lycopene levels increased and those of β-carotene… More >

  • Open Access


    Production of biomass and carotenoids of Dunaliella tertiolecta in nitrogen-limited cultures

    López-Elías JA1, D Fimbres-Olivarría3, LA Medina-Juárez1, A Miranda-Baeza2, LR Martínez-Córdova1, DMA Molina-Quijada3

    Phyton-International Journal of Experimental Botany, Vol.82, pp. 23-30, 2013, DOI:10.32604/phyton.2013.82.023

    Abstract Microalgae have a high content of antioxidant compounds (carotenoids, phycobilins and fatty acids) used in biotechnology industry. Under stress conditions Dunaliella cells produce more carotenoids. Because of this, we evaluated growth, biomass and carotenoid production under control (indoor) and outdoor conditions using mass cultures of Dunaliella tertiolecta Butcher, under nitrogenlimited media. Control medium was f/2 (nitrates: 18.75 g/L), and limited media were f/4 (nitrates: 37.5 g/L), f/6 (nitrates: 25 g/L) and f/8 (nitrates: 18.75 g/L). The highest cell concentrations were found in cultures using medium f/2 maintained indoor (1.28 x 106 cells/mL) and outdoor (0.76 x 106 cell/mL). Dry biomass… More >

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