An Everyday DNA blog article
Written and Illustrated by: Sarah Sharman, PhD
As a child of the 1990s, I was a big fan of the old Tim Burton Batman movies—especially Batman & Robin. My science-loving brain was fascinated by Poison Ivy, the villain who becomes a half-plant, half-human hybrid. Surely that couldn’t happen in real life… plants and humans don’t have much in common, right?
Plants draw energy from sunlight using their leaves, while humans like me power up on pizza and coffee. Plants are rooted in one place; I definitely am not. On the surface, we couldn’t be more different.
But beneath skin and cellulose, inside every cell, we’re built from the same blueprint of life: DNA. While a human-plant hybrid like Poison Ivy is pure science fiction, the shared language of DNA is very real, and it’s how scientists are solving some of the biggest challenges in both human health and agriculture.
The Universal Alphabet
DNA, or deoxyribonucleic acid, if we’re being formal, is the fundamental code of almost all life on Earth. Think of it as a universal instruction manual. While the “books” for a person and a flower look different on the outside, they are written with the same four-letter alphabet: A (adenine), C (cytosine), T (thymine), and G (guanine).
These letters pair up to form the rungs of the famous twisting DNA ladder you’ve probably seen in biology class. The specific order of these letters determines how the body makes proteins, the hardworking molecules that build tissues, fight infections, and carry out just about everything a living thing does.
Even though humans and plants look worlds apart, our genomes share thousands of the same basic genes: the ones responsible for everyday housekeeping, like copying DNA, making proteins, and turning sugar into energy. We even share common enemies; both humans and plants must defend themselves against viruses, fungi, and even “cancer-like” uncontrolled cell growth.
Different Scale, Same Code
If we use the same four letters, why aren’t we all green and photosynthetic? The secret lies in the arrangement, complexity, and sheer volume of the letters.
Humans typically have 23 pairs of chromosomes (the structural unit of DNA) and about 3 billion DNA letters. By contrast, plants are the “wild west” of genetics. They are among the most genetically diverse species on the planet.
For example, a tiny carnivorous plant called Genlisea tuberosa has one of the smallest genomes, with only about 61 million DNA letters. Compare that with Paris japonica, a slow-growing mountain flower that boasts a staggering 149 billion base pairs, nearly 50 times larger than the human genome.
Even though humans and plants look worlds apart, our genomes share thousands of the same basic genes: the ones responsible for everyday housekeeping, like copying DNA, making proteins, and turning sugar into energy. We even share common enemies; both humans and plants must defend themselves against viruses, fungi, and even “cancer-like” uncontrolled cell growth.
Different Scale, Same Code
If we use the same four letters, why aren’t we all green and photosynthetic? The secret lies in the arrangement, complexity, and sheer volume of the letters.
Humans typically have 23 pairs of chromosomes (the structural unit of DNA) and about 3 billion DNA letters. By contrast, plants are the “wild west” of genetics. They are among the most genetically diverse species on the planet.
For example, a tiny carnivorous plant called Genlisea tuberosa has one of the smallest genomes, with only about 61 million DNA letters. Compare that with Paris japonica, a slow-growing mountain flower that boasts a staggering 149 billion base pairs, nearly 50 times larger than the human genome.
Currently, one of the most transformative tools is long-read sequencing. Older methods, like short-read sequencing, were like trying to assemble a 1,000-piece jigsaw puzzle by looking at tiny, one-inch snippets. It worked, but it was slow and easy to mix up repeated patterns. Plant genomes are especially tricky because they are full of repeats, like a puzzle that is 70 percent sky. Short-read sequencing gets lost in the blue pieces.
Long-read sequencing lets researchers read much larger stretches of DNA at once, more like connecting whole sections of the puzzle in one go. It’s like switching from a tiny snapshot to a panoramic photo that shows exactly where the sky meets the horizon.
The Power of the Split-Screen: Genomics in Action
You might wonder what any of this means for your daily life. The answer: quite a lot.
At HudsonAlpha, our work in genomics isn’t siloed; it’s a cross-pollination of ideas. When we use long-read sequencing to help a family find an answer to a child’s developmental delay, we are using the same computational “muscles” that help a farmer identify why his crops aren’t thriving in drought conditions. By investing in these tools, we aren’t just solving two different problems; we’re building a single, powerful engine of discovery that fuels both a healthier population and a more robust, tech-driven rural economy.
To understand the impact, let’s look at how this plays out in real-time:
Researchers at HudsonAlpha are experts at sequencing and interpreting both plant and human DNA, driving impactful discoveries to help improve the human condition, from better understanding human health and disease to developing more sustainable and hearty crops to feed the world.
