Large Cells for Tiny Leaves (IMAGE)
Caption
Stipules arise at the base of a leafstalk and may remain inconspicuous because of growth arrest, as in hairy bittercress (left). These different growth patterns depend on the LMI1 gene, which causes growth arrest. When LMI1 is mutated, stipules grow out as additional leaves (middle). The same gene, is responsible for growth arrest of tendrils - the thread-like structures at the tip of pea leaves (right). This is because in pea LMI is active at the tip of the leaf rather than the stipules, which form large photosynthetic organs.
Credit
Peter Huijser
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