Nevertheless, plant species survive and persist. Plants are subjected to innumerable forms of stress, from extreme climate to microbial pathogens.
Silencing TaISP by virus-induced gene silencing in a susceptible wheat cultivar reduces fungal growth and uredinium development, suggesting an increase in resistance against Pst infection. Expression of Pst_12806 in plants reduces electron transport rate, photosynthesis, and production of chloroplast-derived ROS. Pst_12806 interacts with the C-terminal Rieske domain of the wheat TaISP protein (a putative component of the cytochrome b6-f complex). Pst_12806 is upregulated during infection, and its knockdown (by host-induced gene silencing) reduces Pst growth and development, likely due to increased ROS accumulation. It suppresses plant basal immunity by reducing callose deposition and the expression of defense-related genes. Transient expression of Pst_12806 inhibits BAX-induced cell death in tobacco plants and reduces Pseudomonas-induced hypersensitive response in wheat. tritici ( Pst), that is translocated into chloroplasts and affects chloroplast function. Here we identify a haustorium-specific protein (Pst_12806) from the wheat stripe rust fungus, Puccinia striiformis f.
Chloroplasts are important for photosynthesis and for plant immunity against microbial pathogens.
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