Response of rice (Oryza sativa) exposed to both biotic and abiotic stresses can be quantified by employing fast and accurate optical methods. In this study, the overall stress responses of (i) 12 near-isogenic lines (NILs) in the genetic background of the rice blast-susceptible cultivar Lijiangxintuanheigu (LTH) and (ii) four NILs in the genetic background of the bacterial blight-susceptible cultivar IR24, were inspected by means of Chl fluorescence (Chl-F) imaging. The distribution of the maximum and effective quantum yield of PSII (Fv/FM and QY) and steady-state Chl-F (Ft) were found to be effective in differentiating symptomatic leaf tissue for both rice blast and bacterial blight, which correlated well with 30 cycles of rice blast and six cycles of bacterial blight previously screened using classical (manual) approaches. Subsequently, identified Chl-F parameters allowing detection under ambient light (QY and Ft) were tested across both biotic and abiotic (drought) stress experiments, for rice cultivars contrasting for drought stress response (N22, IR64 and NSIC Rc 222). Their applicability has been proven for both rice blast and bacterial blight; however, QY failed to detect the effect of drought. In addition to Chl-F, the usefulness of 11 selected vegetation indices (Vis) was tested on these three cultivars exposed to particular stresses: (i) rice blast was detectable by Vis calculated from the visible spectrum; (ii) bacterial blight by near-infrared-related Vis; and (iii) drought by Vis calculated from the visible spectrum. The key Chl-F parameters and/or Vis have been summarized and discussed.

• MeSH
• chlorofyl chemie   metabolismus   MeSH
• fluorescence MeSH
• fluorometrie MeSH
• fotosystém II (proteinový komplex) genetika   metabolismus   MeSH
• fyziologický stres * MeSH
• interakce hostitele a patogenu MeSH
• listy rostlin genetika   metabolismus   mikrobiologie   MeSH
• Magnaporthe fyziologie   MeSH
• nemoci rostlin genetika   mikrobiologie   MeSH
• období sucha * MeSH
• regulace genové exprese u rostlin MeSH
• rýže (rod) genetika   metabolismus   mikrobiologie   MeSH
• spektrofotometrie MeSH
• Xanthomonas fyziologie   MeSH
• Publikační typ
• časopisecké články MeSH