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  • Open Access

    ARTICLE

    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., , 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

    ARTICLE

    Genotypic Divergence, Photosynthetic Efficiency, Sodium Extrusion, and Osmoprotectant Regulation Conferred Salt Tolerance in Sorghum

    Ashaduzzaman Sagar1 , Md. Sabibul Haque1, Md. Alamgir Hossain1, Md. Nesar Uddin1, Jannat E. Tajkia1, Md. Ashik Mia1, Toufika Hossain Shabi2, Md. Solaiman Ali Fakir1, Md. Abdul Kader3,4,5, Walid Soufan6, Md. Atikur Rahman7, Muhammad Aamir Iqbal8, Mohammad Sohidul Islam9, Ayman El Sabagh10,*, A. K. M. Zakir Hossain1,*

    Phyton-International Journal of Experimental Botany, Vol., , DOI:10.32604/phyton.2023.028974

    Abstract Salt stress is one of the major limitations to modern agriculture that negatively influences plant growth and productivity. Salt tolerant cultivar can provide excellent solution to enhance stress tolerance with plant fitness to unfavorable environments. Therefore, this study was aimed to screen salt tolerant sorghum genotypes through evaluating of different morphological, biochemical, and physiological attributes in response to salinity stress. In this study, we have been evaluated total six sorghum genotypes including Hybrid sorgo, Debgiri, BD-703, BD-706, BD-707, and BD-725 under salt stress (12 dS m−1 NaCl). The response variables included length and weight of root and shoot, root: shoot… More >

  • Open Access

    ARTICLE

    The Function of GABA in Plant Cell Growth, Development and Stress Response

    Yue Jin1, Lulu Zhi1, Xin Tang1, Yilin Chen1, John T. Hancock2, Xiangyang Hu1,*

    Phyton-International Journal of Experimental Botany, Vol., , DOI:10.32604/phyton.2023.026595

    Abstract Gamma-aminobutyric acid (GABA) is a ubiquitous four-carbon non-protein amino acid that is involved in various physiological processes of plant growth and development, such as root architecture, stem elongation, leaf senescence, pollen tube growth, fruit ripening, and seed germination. GABA is also related to plant stress responses, such as drought, salt, cold, and heat stresses. Regulation of GABA in plant stress responses is complex and involves multiple signaling pathways, including calcium and hormone signaling. This paper systematically reviews the synthesis, metabolic pathways and regulatory role of GABA in plants, which will provide new insights into the understanding of plant growth and… More >

  • Open Access

    REVIEW

    Effect of Dandelion (Taraxacum mongolicum Hand.-Mazz.) Intercropping with Different Plant Spacing on Blight and Growth of Pepper (Capsicum annuum L.)

    Peixin Li1,2,#, Hanbing Liu1,2,#, Yingtong Chen3, Xin Zhang1,2, Ning Cao1,2, Ying Sun1,2, Meimei Jia1,2, Mengran Wu1,2, Xuejiao Tong1,2, Xinmei Jiang1,2, Xihong Yu1,2,*,#, Yao Cheng1,2,*,#

    Phyton-International Journal of Experimental Botany, Vol., , DOI:10.32604/phyton.2023.027392

    Abstract Intercropping of crops that can secrete bacteriostatic active substances can not only inhibit the occurrence of disease but also have an important effect on plant growth. However, the effects of dandelion intercropping on pepper blight control and pepper growth remain unclear. In this study, the control effect of dandelion on pepper blight was studied by inoculating the pepper leaves with Phytophthora infestans, and it also discusses the correlation of the occurrence of pepper epidemic disease with the pepper canopy environment, soil environment, pepper photosynthesis, and yield index. The results showed that best plant distance for dandelion intercropping was 20 cm… More >

  • Open Access

    ARTICLE

    A Novel Hybrid Model Based on Machine and Deep Learning Techniques for the Classification of Microalgae

    Volkan Kaya1, İsmail Akgül1, Özge Zencir Tanır2,*

    Phyton-International Journal of Experimental Botany, Vol., , DOI:10.32604/phyton.2023.029811

    Abstract Classification and monitoring of microalgae species in aquatic ecosystems are important for understanding population dynamics. However, manual classification of algae is a time-consuming method and requires a lot of effort with expertise due to the large number of families and genera in its classification. The recognition of microalgae species has become an increasingly important research area in image recognition in recent years. In this study, machine learning and deep learning methods were proposed to classify images of 12 different microalgae species in order to successfully classify algae cells. 8 Different novel models (MobileNetV3Small-Lr, MobileNetV3SmallRf, MobileNetV3Small-Xg, MobileNetV3Large-Lr, MobileNetV3Large-Rf, MobileNetV3Large-Xg, MobileNetV3Small-Improved and… More >

  • Open Access

    ARTICLE

    Antibacterial Activity and Mechanisms of Ethanol Extracts from Scutellaria baicalensis Georgi and Magnolia officinalis against Phytophthora nicotianae

    Xu Gao, Ziqi Shen, Jinliang Xu, Min Fan, Qiang Li*

    Phyton-International Journal of Experimental Botany, Vol., , DOI:10.32604/phyton.2023.027318

    Abstract Phytophthora nicotianae causes substantial economic losses in most countries where tobacco is produced. At present, the control of P. nicotianae mainly depends on chemical methods, with considerable environmental and health issues. We investigated the effects of ethanol extracts from Scutellaria baicalensis Georgi (SBG) and Magnolia officinalis (MO). On mycelial growth, sporangium formation, and zoospore release of P. nicotianae. Both extracts inhibited the growth of P. nicotianae, with mycelial growth inhibition rates of 88.92% and 93.92%, respectively, at 40 mg/mL, and EC50 values of 5.39 and 5.74 mg/mL, respectively. The underlying mechanisms were the inhibition of sporangium formation, the reduction of… More >

  • Open Access

    ARTICLE

    Repellent and Insecticidal Activity of Naphthoquinones from the Heartwood of Tectona grandis on Incisitermes marginipennis (Latreille)

    Crisanto Velázquez-Becerra1,*, Gu Yen Ambriz-Ortiz1, Rafael Torres-Martínez2, Mauro Manuel Martínez-Pacheco3

    Phyton-International Journal of Experimental Botany, Vol., , DOI:10.32604/phyton.2023.026954

    Abstract Wood is a lignocellulosic material that, because of its organic nature, is a source of nutrients for bacteria, fungi, and insects. Incisitermes marginipennis (Latreille) is an interesting dry wood-boring termite. Because it is an extremely destructive pest, difficult to control due to its cryptic lifestyle, and for its role in the biogeochemical cycle of carbon and other elements; it is a fundamental organism. The use of less toxic and eco-friendly substances is important for protecting domestic, cultural, and historical heritage made of wood or lignocellulosic materials. The aim of this study was to evaluate the biological activity of various naphthoquinones… More >

  • Open Access

    ARTICLE

    The Physiological Mechanisms Underlying N2-Fixing Common Bean (Phaseolus vulgaris L.) Tolerance to Iron Deficiency

    Abdelmajid Krouma1,2,*

    Phyton-International Journal of Experimental Botany, Vol., , DOI:10.32604/phyton.2023.029048

    Abstract Iron is an essential element for plants as well as all living organisms, functioning in various physiological and biochemical processes such as photosynthesis, respiration, DNA synthesis, and N2 fixation. In the soil, Fe bioavailability is extremely low, especially under aerobic conditions and at high pH ranges. In contrast, plants with nodules on their roots that fix atmospheric nitrogen need much more iron. To highlight the physiological traits underlying the tolerance of N2-fixing common bean to iron deficiency, two genotypes were hydroponically cultivated in a greenhouse: Coco nain (CN) and Coco blanc (CB). Plants were inoculated with an efficient strain of… More >

  • Open Access

    ARTICLE

    Physiological and Biochemical Mechanisms of Salinity Tolerance in Carex morrowii Boott

    Aysegul Akpinar*

    Phyton-International Journal of Experimental Botany, Vol., , DOI:10.32604/phyton.2023.029006

    Abstract Carex species are widely used in many parts of the world and contain a large number of ecologically diverse species. Among the Carex species, some of them are known to be glycophytes, while others are halophytes. Carex morrowii Boott (Cyperaceae) is resistant to trample through their root structure and has an essential ornamental value in the landscape with their leaves. However, no information was found about the level of salinity tolerance/ sensitivity of the Carex morrowii among these species. In the present study, changes in trace element contents (Na, K, Ca, Cu, Mn, Mg, Ni, Fe, P, Zn, and N)… More >

  • Open Access

    ARTICLE

    Lipid Production, Oxidative Status, Antioxidant Enzymes and Photosynthetic Efficiency of Coccomyxa chodatii SAG 216-2 in Response to Calcium Oxide Nanoparticles

    Huwida A. A. Abdel-Kader1, Naeima Yousef1, Mohammad Anwar Hossain2,*, Mona F. A. Dawood1,*

    Phyton-International Journal of Experimental Botany, Vol., , DOI:10.32604/phyton.2023.028583

    Abstract The extensive use of nanoparticles (NPs) in diverse applications causes their localization to aquatic habitats, affecting the metabolic products of primary producers in aquatic ecosystems, such as algae. Synthesized calcium oxide nanoparticles (CaO NPs) are of the scarcely studied NPs. Thus, the current work proposed that the exposure to CaO NPs may instigate metabolic pathway to be higher than that of normally growing algae, and positively stimulate algal biomass. In this respect, this research was undertaken to study the exposure effect of CaO NPs (0, 20, 40, 60, 80, and 100 µg mL−1 ) on the growth, photosynthesis, respiration, oxidative… More >

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