Qingsong Jiao, Xueyun Hu^*

Phyton-International Journal of Experimental Botany, Vol.94, No.9, pp. 2615-2630, 2025, DOI:10.32604/phyton.2025.069246 - 30 September 2025

Abstract Chlorophyll fluorescence, particularly the parameter F_v/F_m, has emerged as a reliable, non-invasive indicator of the maximum quantum efficiency of Photosystem II (PSII) in plants. Over the past decade, significant research has leveraged F_v/F_m to evaluate plant responses to a wide range of biotic and abiotic stresses, as well as to support crop improvement and ecological monitoring. This review synthesizes recent progress in understanding the physiological basis, measurement techniques, and applied significance of F_v/F_m across diverse plant systems. We highlight methodological advancements in fluorescence imaging and remote sensing, identify consistent patterns and contrasting findings in stress-response studies, and More >

Alexis Salazar-Navarro¹, Víctor Ruíz-Valdiviezo², José Joya-Dávila¹, Daniel González-Mendoza^1,*, Olivia Tzintzun-Camacho¹, Ulin Basilio-Cortes¹, Dagoberto Duran-Hernández¹, Henry López-Lopez¹, Onecimo Grimaldo-Juárez¹

Phyton-International Journal of Experimental Botany, Vol.94, No.3, pp. 641-655, 2025, DOI:10.32604/phyton.2025.062871 - 31 March 2025

Abstract The biochemical response of Coffea arabica var. Borbon to chitosan and chitosan oligosaccharides (COS) was evaluated in one-year-old plants under greenhouse conditions. COS solutions were synthesized through chemical and physical hydrolysis using acetic acid, hydrogen peroxide, and microwave irradiation. The obtained COS had an average molecular weight (Mw) of 3549.90 ± 0.33 Daltons (Da), a deacetylation degree (DD) of 76.64 ± 1.12%, and a polymerization degree (PD) of 18.91 ± 0.0018. Solutions of chitosan and COS were applied to C. arabica var. Borbon at concentrations of 0.25, 0.5, and 1 wt%. The experimental design was conducted using… More >

Bowen Huang, Enyi Xie^*, Yu Ran, Xinyi Chen, Yongjian Huang, Jianjun Cui^*

Phyton-International Journal of Experimental Botany, Vol.92, No.1, pp. 251-269, 2023, DOI:10.32604/phyton.2022.022672 - 06 September 2022

Abstract In aquaculture, high-density seaweed farming brings higher economic benefits but also increases outbreaks of diatom felt. The effective control of diatom felt in high-density seaweed farming has always been a research hotspot. This study selected two potential allelochemicals 2-hydroxycinnamic acid and quinic acid to explore their effects on a diatom Nitzschia closterium and an economic seaweed Monostroma nitidum. The results showed that 2-hydroxycinnamic acid had better inhibitory effects than quinic acid on the growth, pigment content and photosynthetic efficiency of N. closterium. Their half-maximal inhibitory concentrations at 120 h (IC_{50–120 h}) were 0.9000 and 1.278 mM, respectively. Additionally, these… More >

Ekhlaque A. Khan^1,2,*, Hamdino M. I. Ahmed³, Meena Misra¹, Pallavi Sharma^1,4, Amarendra N. Misra¹

Phyton-International Journal of Experimental Botany, Vol.91, No.5, pp. 959-973, 2022, DOI:10.32604/phyton.2022.018708 - 24 January 2022

Abstract Cadmium (Cd), a life threatening hazardous heavy metal is abundant in nature. Cd amounts are greater in leaves than other plant parts, and it shows considerable effects on photosynthesis. Nitric oxide (NO), a free radical present in living organisms, is now known as an important signaling molecule playing various physiological processes in plants. In this study, the possible ameliorative effect of NO on photosynthesis was examined on pea seedlings grown under Cd stress. Results showed that chlorophyll, net photosynthetic rate, transpiration rate, stomatal conductance, photochemical efficiency of Photosystem II and Photosystem I decreased, and Fo More >