Contact: Z. Jeff Chen
University of Texas at Austin
Caption: Small RNAs affect development of seeds. These are arabidopsis seeds three, four, five, six and seven days after pollination (left to right). First row: diploid seeds. Second row: seeds from a cross between a diploid mother and tetraploid father. Third row: seeds from a cross between a tetraploid mother and diploid father. Fourth row: tetraploid seeds. Note that seeds in the third row (five to six days after pollination) are much smaller than those in the second row as a result of increased maternally inherited small RNAs.
Credit: Z. Jeff Chen, The University of Texas at Austin
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Related news release: Seed size is controlled by maternally produced small RNAs, scientists find