Diagnosis of the infection of sunflower by Orobanche cumana using multicolour fluorescence imaging

摘要: Orobanche cumana is an holoparasite and thus totally dependent on sunflower for fixed carbon. Initial stages of the infection occur in first weeks after sowing are critical establishment a continuum between host parasite vascular system. From that moment obtains its supply water, mineral nutrients, assimilates from plant. Alterations plant metabolism can be detected using remote sensing techni- ques detection fluorescence emitted by plants. One these indirect techniques multicolour imaging. In this work, we assessed early O. ima- ging inferred physiological processes affected plants infected parasite. Ten germinated seeds inbred line NR5 were inoculated with population LP2013 cumana. The same number not was used as control. Sunflower planted pots soil mixture grown greenhouse at 12-22°C 6 weeks. Multicolour fluores- cence imaging conducted 3, 4, 5 inoculation. two pairs fully expanded leaves each imaged, and, measure date, five variables com- pared to those Three inoculation, when symptoms still observed, decreased levels blue green increased far-red observed inocu- lated At 4 displayed cumana, differences