Short waterlogging events differently affect morphology and photosynthesis of two cucumber (Cucumis sativus L.) cultivars

• DOI: 10.3389/fpls.2022.896244
• Publication Date: 2022-07-22T17:13:22Z
• Authors: Omolayo J. Olorunwa; Bikash Adhikari; Skyler Brazel; Sorina C. Popescu; George V. Popescu; T. Casey Barickman
• Keywords: Cucumis; Stomatal Conductance; Waterlogging (archaeology); Photosynthetic capacity

Waterlogging induces growth and developmental changes in sensitive crops such as cucumber (Cucumis sativus L.) during early plant development. However, information on the physiological mechanisms underpinning response of plants to waterlogging conditions is limited. Here, we investigated effects 10-day stress morphology, photosynthesis, chlorophyll fluorescence parameters two cultivars seedlings. hampered cultivars' growth, biomass accumulation, photosynthetic capacity. Both also developed adventitious roots (ARs) after 10 days (DOW). We observed differential responses light- carbon-dependent reactions with an increase light-dependent reactions. At same time, carbon assimilation was considerably inhibited by waterlogging. Specifically, CO2 rate (A) leaves significantly reduced caused a corresponding decrease stomatal conductance (gs). The downregulation maximum Rubisco efficiency (Vcmax) electron transport (Jmax) were non-stomatal limiting factors contributing A reduction. Exposure DOW affected PSII photochemistry downregulating quantum yield (ΦPSII). redox state primary quinone acceptor lake model (1-qL), measure regulatory balance light reactions, became more oxidized DOW, indicating enhanced sink capacity despite A. Overall, results suggest that alterations photochemical apparatus cucumber. Thus, developing resist inhibition while maintaining metabolism potential approach for increasing crops' tolerance waterlogged environments.