Abstract
The effect of chilling stress (6 ± 2 °C) on the photosynthetic capacity of grapevine in cultivars of different chilling sensitivity was studied under laboratory conditions. Chilling stress (4 h under 80 W m -2 illumination) reduced the capacity of 14 CO 2 incorporation by 10 % (Leanyka) and 2.0-70 % (Zold veltelini), respectively. The onset of injury was influenced by the level of nutrients available. This decrease of the photosynthetic capacity was reversible. Longer exposure resulted in a cold adaptation in both cultivars. The more tolerant Leanyka responded to chilling by closing stomata while in the more sensitive Zold veltelini stomatal response was impaired. Chilling acted as a water stress as shown by a decrease of the water potential and by influencing the kinetic properties of fluorescence induction which indicates an inhibition of Photosystem II.
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.
