Seeds Under Glass

Nineteen pressurized canisters sat in two staggered rows along Cargo Bay One, their hull plates still frosted with Callisto atmosphere. Each steel drum held a sealed plug of loamy silt, an automated misting loop, and a mature crown of genetically altered Jovian flora. Together, they weighed twenty metric tons. Song Meiling's flight computer allowed exactly forty kilograms of botanical cargo if the Canglong was to clear Jupiter's radiation belts alive.

Ran Youzhen stood on the non-skid deck plates with a hydraulic pry-bar in her left hand and a handheld cryo-siphon slung across her shoulder.

"You have twenty-eight minutes until our periapsis burn window closes," Meiling's voice rasped through the bay's overhead intercom. "If those drums are still bolted to the deck when the thrusters fire, I vent the whole bay from the cockpit. Soil, ferns, and curator included."

"Give me twenty minutes," Youzhen said into her collar mic. "And do not touch the emergency dump valve until I clear the seal."

"Nineteen minutes," Meiling answered. A faint chime marked the cutoff.

Behind Youzhen, the airlock hatch clicked. Gu Jianhe stepped into the hold, his right arm bound tightly against his chest in a fresh thermal sling. The smell of cold burn-gel lingered around his collar. With his left hand, he carried a heavy Pelican transit case lined with shock-absorbing foam and thirty-two empty micro-slits.

"The pilot is not joking," Jianhe said, setting the case on a deck strut. "She has already routed the secondary dump relays past the municipal safety board. The moment her countdown hits zero, the belly doors swing wide."

"I know," Youzhen said. She knelt in front of Pod Six.

Through the reinforced quartz viewport of the drum, a dense mat of Ganymede under-ice rhizomes spread fibrous white runners across nutrient loam under low-lux diodes. Its roots anchored into four hundred kilograms of packed silt and two hundred liters of circulating nutrient water.

Youzhen fitted a magnetic socket wrench to the canister's primary maintenance hatch. When she pulled, the wrench kicked back with a sharp metallic clack.

A red LED blinked on the collar housing: `ERROR 884: MUNICIPAL BIO-QUARANTINE ACTIVE. OFF-STATION EXTRACTION FORBIDDEN DURING TRANSIT.`

"The station's safety daemon is still asserting jurisdiction," Jianhe said, leaning down to inspect the diagnostic panel. "Even with the hub turned to solid glass, Callisto Agricultural Code 14 insists these root balls remain in their original substrate."

"The code was written eighty years ago to stop corporate smuggling," Youzhen muttered. She unlatched her acoustic tuner from her utility belt and clipped its magnetic probe directly to the drum's locking ring. "It requires a dual-key acoustic signal from the master seed vault and a simultaneous liquid-nitrogen vent before the internal core releases."

"We don't have the station's master key," Jianhe said. "And if you crack the nitrogen line wrong, the flash expansion will shatter the ceramic genomic wafers inside."

"Then we don't crack it wrong."

Youzhen set the acoustic tuner to 4,200 Hertz—the harmonic baseline of the hub's titanium-aluminum locking pins. She tapped the probe against the housing with the heel of her hand. The hum vibrated through the metal casing, buzzing against the soles of her magnetic boots.

"Hold the siphon nozzle against the bypass valve," she instructed Jianhe. "Keep the backpressure at two point three bars. If it drops below two, the interlock freezes shut permanently."

Jianhe wedged his left knee under the siphon body to steady it, using his uninjured hand to twist the intake valve. Cold vapor hissed around his knuckles, frosting his suit cuff.

"Pressure holding at two point three," Jianhe said.

Youzhen adjusted the tuner's frequency step by step: 4,240... 4,285... 4,310.

Inside the drum, a heavy spring released with a muffled thud. The yellow diagnostic light flickered, shifted to amber, and finally settled on a steady pale green.

`QUARANTINE BYPASS ACCEPTED. CORE CASSETTE UNLOCKED.`

Youzhen did not pause. She gripped the central T-handle of Pod Six and hauled backward with her whole body.

With a hiss of venting argon, the inner cylindrical cassette slid out from the center of the heavy drum. It was no larger than an artillery shell, barely fifteen centimeters wide, housing twenty-two thousand dormant rhizomes and four high-density optical wafers containing the complete sequenced genomes of Ganymede's under-ice shelves.

She detached the cassette from its heavy liquid jacket, slid the thin core unit into the open transit case at Jianhe's feet, and locked it into the first slot. A tiny diode on the case flickered blue.

"One," Youzhen said, wiping frost from her visor. "Eighteen to go."

They moved down the row with mechanical speed. Jianhe managed the nitrogen backpressure with his left hand and braced the transit case with his boot, while Youzhen worked the tuner, tripped the mechanical latches, and pulled the cassettes.

Drum after drum gave up its genetic core: the dwarf lichens of Ganymede's sub-crust, the radiation-tolerant brassicas from the Outer Spire, the engineered nitrogen-fixing fungi that had kept Callisto's air breathable for three generations.

At Pod Nineteen, Youzhen reached the last canister. The orchid drum.

Through the glass, the blue petals trembled as the coolant loops began to starve. The leaves had already begun to dull, losing their crystalline sheen as the internal heating circuit dropped below zero.

"Youzhen," Meiling's voice broke across the radio, flat and urgent. "Twelve minutes to Jovian periapsis. I am charging the belly-door pneumatic actuators. Clear the bay."

"Almost done," Youzhen replied.

She seated the acoustic tuner on the nineteenth collar. The pins resisted, jammed by a frost heave in the outer jacket. Youzhen took the steel pry-bar, slipped the wedge into the thermal seam, and threw her weight into the lever.

The metal groaned. The frost crackled and split. The T-handle snapped outward, catching the palm of her glove with enough force to sting through the insulated fabric.

The cassette slid free into her hands.

Inside the gutted drum, the live orchid sagged against the cooling glass. Its roots, stripped of the thermal core's heat, stiffened as ice crystals formed across the dark loam.

For two seconds, Youzhen's fingers remained tight around the bare metal handle of the drum, her boots locked to the deck beside the dying plant.

"Ran Youzhen," Jianhe said quietly from the airlock threshold. "The case is full. Bring the seals."

She pulled her hands away, turned, and slotted the nineteenth core cassette into the Pelican container. She brought the heavy lid down and snapped the four titanium latches shut. The digital tare scale on the handle flashed green: `TOTAL MASS: 39.4 KG.`

"Core ark secured," Youzhen spoke into her mic. "We are in the airlock."

"Good," Meiling said. "Hang on to something bolted down."

Youzhen and Jianhe backed through the inner pressure hatch. As the heavy steel doors rolled shut and dog-latched into place, the freighter shuddered beneath their boots.

Through the thick observation window of the airlock, Youzhen watched the cargo bay's outer belly doors slide apart.

The silence of vacuum swept into the hold.

The nineteen hollow steel canisters, unbolted and loose on the guide rails, slid toward the opening under centrifugal force. One by one, they tumbled out into the black expanse beneath the hull. The dark soil spilled from their open collars, dispersing into a cloud of frozen earth and shattered blue petals, catching the faint, distant glare of Jupiter's great swirling storm bands before vanishing into the dark.

Beside her, Jianhe leaned his shoulder against the bulkhead, his good hand resting lightly atop the small plastic case.

"Twenty-two thousand species," Jianhe said, his voice quiet in the narrow airlock.

"Twenty-two thousand," Youzhen agreed.

She tightened the strap of the case over her shoulder, feeling its thirty-nine kilos settle against her ribs as the Canglong's main engines roared to life, driving them down into the gravity well.