Abstract
Abstract Anatomy and photosynthesis of grapevine leaf affected by protuberant growth Grapevine cultivated under controlled environmental conditions developed leaves affected by abaxial protuberant growth in form of raised patches in the intercostal region which were examined by SEM and porometry. Cross‐sections of freeze‐fractured raised patches without prior fixation showed an increase in the number of mesophyll cells responsible for the emergence, without superficial epidermal cracks, necrosis or deformed stomata. Leaves with wide spread symptoms appeared more shiny and curled and, showed a larger reduction in photosynthesis, by up to 76 %, than in transpiration, by up to 20 %, relative to unaffected leaves. It is concluded that this reduction in photosynthesis may be caused by increased mesophyll resistance to CO2 andless light transmission. The protuberant growth was not correlated with ambient CO2 concentrations ranging from 340–700 μl CO2 l−1.
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.
