Contact: Professor Paul Jarvis
University of Leicester
Caption: Arabidopsis seedlings of three different genotypes grown in sectors. Wild-type plants (top) have a dark green color, reflecting their large chloroplasts with extensive thylakoid membrane networks; the ppi1 single mutant plants (bottom right) are pale yellow in color, due to the fact that their chloroplasts do not develop properly; the sp1 ppi1 double mutant (bottom left) has a much greener appearance than ppi1 and contain chloroplasts that are much more developed due to the absence of the SP1 protein.
Credit: Graphics: Paul Jarvis and Qihua Ling
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