Tham khảo tài liệu 'advances in photosynthesis fundamental aspects part 17', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 472 Advances in Photosynthesis - Fundamental Aspects role for ROS generation and disruptions of the photosynthetic electron transport shortly after pathogen attack or toxin treatment have been suggested as potential mechanism Kim et al. 2010 . Similar mechanism has been proposed by Allakhverdiev et al Allakhverdiev et al. 2008 following heat stress that targets the oxygen evolving complex along with the associated cofactors in photosystem II PSII carbon fixation by rubisco and the ATP generating system. In another system Kocal et al Kocal et al. 2008 studied the role of cell wall invertase cw-Inv in transgenic tomato Solanum lycopersicum plants silenced for the major leaf cw-Inv isoforms during normal growth and during the compatible interaction with Xanthomonas campestris pv vesicatoria. Cw-Inv expression was found to be induced upon microbial infection and was most likely associated with an apoplastic hexose accumulation during the infection process. The hexoses formed are thought to aid the pathogen s nutrition Berger et al. 2007 Biemelt and Sonnewald 2006 Seo et al. 2007 . Fungal pathogens also produce their own invertases to ensure their nutritional supply Chou et al. 2000 Voegele et al. 2006 . One of the most sophisticated mechanisms that divert plant metabolites to pathogen is the role of auxin in host-pathogen interactions Fu et al. 2011 Navarro et al. 2006 . Indole-3-acetic acid IAA is the major form of auxin in most plants and induces the loosening of plant cell wall the natural protective barrier to invaders. X. oryzae pv oryzae X. oryzae pv oryzicola and M. grisea secrete IAA which in turn may induce rice to synthesize its own IAA at the infection site. IAA induces the production of expansins the cell wallloosening proteins and makes rice vulnerable to pathogens Fu et al. 2011 . Similarly Garavaglia et al Garavaglia et al. 2010 have reported an eukaryotic-acquired gene by a biotrophic phytopathogen that allows its prolonged survival on the host by .
