A day in the life of a Seed Processing Assistant
It's just another working day for Angie Bell, one of Kew's Seed Processing Assistants, as she heads down the spiral staircase to the underground vault of the Millennium Seed Bank where she will be banking seeds from Malawi in sub-zero temperatures.
As a Seed Processing Assistant my role includes a range of tasks that are carried out at various times throughout the week.
These tasks include seeing the seed collections from arrival at the Seed Bank, all the way through to banking them in the vault, and beyond. The collections are dried, cleaned, x-rayed, counted, banked and then germination tested. Each day is different as, although the range of tasks is fairly limited, the material we are working on is very varied. This makes it a very exciting role and you are always learning something new!
First task of the day
This morning my team are working down in the vault preparing some seed collections for storage at -20°C and, where necessary, at -190°C in cryo storage as well. By this point the collections have been cleaned, x-rayed and counted and have spent a month in the main dry room at 15% relative humidity (RH) to ensure they are dry enough for storage. We use a non-destructive Rotronic device to check that the RH of the seeds is at 17% RH or less.
Today we are banking species from Malawi. Each collection is placed in a suitably sized glass container with an indicator sachet and, using our database, a location in the freezer is allocated and labels for the containers printed.
Once we have repeated this process for each collection in the batch the next step is dressing up in the big blue suits to go into the freezer and put the containers in/on the relevant drawer and shelves. It is exciting to know that by lunchtime we have added seeds from another 60 species to the 1.9 billion seeds already in storage at the MSB.
A different task for the afternoon
It is all change in the afternoon with x-raying to be done. Using our digital x-ray machine we can view the contents of a sample of each seed collection and determine its quality. The machine produces an image that allows us to see full, empty, infested and diseased seeds in detail. Not all collections take a great picture so in those instances we cut open some seeds under a microscope instead. We work through a number of collections until we get to this Leguminosae species; it has a number of infested seeds present, you can even see some maggots!
Change of plan as an exciting new batch arrives
While we are working a batch arrives from the USA. An incoming batch takes priority over any other work so we pack away and clean up ready to unpack the new collections. Each batch comes with lots of paperwork and the first job is to check if any chemical treatments have been used or if any quarantine or CITES listed species are present, as these would need to be separated and handled differently.
We unpack the box inside an extraction hood and wear gloves as a precaution. In the box we find 35 seed collections with associated voucher specimens and data sheets. Using the batch list we check that seeds, voucher specimen and data are included for each species. We open and assess each seed collection and also make notes where relevant e.g. if the collection is very small.
Once unpacked the seeds are placed in a crate in the dry room.
The vouchers are placed at -20°C for one week prior to processing, the data is entered onto our database, and the International Coordinator for the USA is informed that the batch has arrived safely. By the time we have finished clearing up it is 5pm and time to go home.
- Angie -