求题为A small leak will sink a great ship的演讲稿

A small leak will sink a great ship

Mutation in a microRNA converts petals to stamens. The mutants of petunia and snapdragon show marked similarity. The studies revealed that, due to a common gene defect, the 'plan' underlying the control of floral organ identity is impaired - resulting in 'the wrong organ at the wrong place'.
Image: MPI for Plant Breeding ResearchFlowers of higher plants are built in a similar pattern: their outermost whorl is composed of sepals, which protect the young bud, thereafter comes a whorl of often colorful petals attracting insect pollinators, followed by a whorl of stamens with pollen sacks and the innermost whorl holds carpels, which later give rise to the fruit and seeds. This basic architecture is comparable in higher plants prompting the question after common components of a genetic 'masterplan'.

Researchers in the group of Zsuzsanna Schwarz-Sommer investigated a mutant of snapdragon where stamens