Abstract
A field experiment was performed to study the effects of spraying exogenous 6-benzyladenine (6-BA) after waterlogging for 6 days at the third leaf stage on the leaf mesophyll cell ultrastructure, chlorophyll content, gas exchange parameters, chlorophyll fluorescence, and malondialdehyde (MDA) content of summer maize (Zea mays L.) hybrids Denghai605 (DH605) and Zhengdan958 (ZD958), to determine the photosynthetic mechanism for the regulation of 6-BA to waterlogged summer maize. Results showed that exogenous application of 6-BA effectively alleviated the adverse effects of waterlogging on photosynthetic characteristics by increasing leaf area index and chlorophyll content. Treatment with spraying exogenous 6-BA resulted in significant and substantial (in the range of 9–37%) increases of the net photosynthetic rate compared to waterlogging treatments. In addition, spraying 6-BA effectively alleviated the adverse effects of waterlogging on leaf ultrastructure by increasing the numbers of grana and grana lamella, decreasing MDA content, and improving membrane structure and chloroplast structure. Visibly, spraying exogenous 6-BA effectively alleviated the adverse effects of waterlogging on leaf ultrastructure of summer maize led to the improvement of photosynthetic performance, resulting in significant and substantial (around 20%) increases in grain yield compared to those of the waterlogging treatments.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
