Fig 2. Treatment of Capsicum annuum with non-host Phytophthora nicotianae or BABA elicits localized autofluorescent compounds and reduces photosynthetic rate in C. annuum.

(A) C. annuum leaves were inoculated with 2,000 P. nicotianae zoospores, 2.5 mM BABA or mock inoculated with water and incubated in a humidity chamber. After 48 hours, inoculated leaf tissue was excised and imaged using a stereofluorescent microscope. (B) C. annuum plants were soil drenched with P. nicotianae or P. capsici zoospore solutions (100,000 zoospores per plant), 2.5 mM BABA or water and photosynthetic rate was measured using a Licor 6400 portable photosynthesis system 3 days post inoculation. Standard deviation bars are shown.