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Starch staining of wild type, ppi1, and ppi2. Cotyledons and root tips of 10-d-old seedlings were harvested and stained with iodine. A, Wild-type (WT) cotyledon; B, wild-type root; C, ppi1 cotyledon; D, ppi1 root; E, ppi2 cotyledon; F, ppi2 root.
