From 52f89db2db709d0f704a42348e39c608a7db49ab Mon Sep 17 00:00:00 2001
From: Viktoria Petrova <vipet103@hhu.de>
Date: Sat, 2 Nov 2024 14:37:09 +0100
Subject: [PATCH] add absolute quantification of bacteria assay and protocol

---
 .../AbsoluteQuantificationOfBacteria/README.md   |   0
 .../dataset/.gitkeep                             |   0
 .../isa.assay.xlsx                               | Bin 0 -> 6909 bytes
 .../protocols/.gitkeep                           |   0
 .../AbsoluteQuantificationOfBacteriaProtocol.md  |   7 +++++++
 5 files changed, 7 insertions(+)
 create mode 100644 assays/AbsoluteQuantificationOfBacteria/README.md
 create mode 100644 assays/AbsoluteQuantificationOfBacteria/dataset/.gitkeep
 create mode 100644 assays/AbsoluteQuantificationOfBacteria/isa.assay.xlsx
 create mode 100644 assays/AbsoluteQuantificationOfBacteria/protocols/.gitkeep
 create mode 100644 assays/AbsoluteQuantificationOfBacteria/protocols/AbsoluteQuantificationOfBacteriaProtocol.md

diff --git a/assays/AbsoluteQuantificationOfBacteria/README.md b/assays/AbsoluteQuantificationOfBacteria/README.md
new file mode 100644
index 0000000..e69de29
diff --git a/assays/AbsoluteQuantificationOfBacteria/dataset/.gitkeep b/assays/AbsoluteQuantificationOfBacteria/dataset/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/assays/AbsoluteQuantificationOfBacteria/isa.assay.xlsx b/assays/AbsoluteQuantificationOfBacteria/isa.assay.xlsx
new file mode 100644
index 0000000000000000000000000000000000000000..ed571a573bc16024ea58c94763bc62b3f91adb4e
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diff --git a/assays/AbsoluteQuantificationOfBacteria/protocols/.gitkeep b/assays/AbsoluteQuantificationOfBacteria/protocols/.gitkeep
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index 0000000..e69de29
diff --git a/assays/AbsoluteQuantificationOfBacteria/protocols/AbsoluteQuantificationOfBacteriaProtocol.md b/assays/AbsoluteQuantificationOfBacteria/protocols/AbsoluteQuantificationOfBacteriaProtocol.md
new file mode 100644
index 0000000..dae31d5
--- /dev/null
+++ b/assays/AbsoluteQuantificationOfBacteria/protocols/AbsoluteQuantificationOfBacteriaProtocol.md
@@ -0,0 +1,7 @@
+## Absolute quantification of bacteria
+
+Genomic DNA was isolated from roots of plants grown in FlowPots (experiments K and L). DNA concentration was determined with the Quant-iT PicoGreen double-stranded DNA Assay Kit (Thermo Fisher Scientific). To quantify bacterial load on plant roots, the amount of bacterial DNA relative to the amount of plant DNA was determined via quantitative PCR (qPCR). For bacteria, the v5-v7 region of the 16S rRNA gene was amplified using the AACMGGATTAGATACCCKG (799F) and ACGTCATCCCCACCTTCC (1192R) primers. For Col-0, a fragment of At1g12360 was amplified using the TCCGGTCAATATTTTTGTTCG and TATAGCAGCGAAAGCCTCGT primers, and for Gifu, a fragment of the *NFR5* gene was amplified using the TCATATGATGGAGGAGTTGTCTGTT and ATATGAGCTTCGGAGCATGG primers. qPCR was performed as described previously46. The amount of 16S rRNA was normalized to plant gene within each individual sample using the following equation: 
+
+16S rRNA gene over plant gene = 2-Ct(16S)/2-Ct(plant).
+
+For colony counts (exp. E), roots were harvested, washed, weighed and crushed in 500 µl (Col-0) or 750 µl (Gifu) of sterile water. Serial dilutions of 10−1, 10−2, 10−3, 10−4 and 10−5 of the crushed roots were prepared in sterile water. Then 10 µl of each were spotted onto 10% TSB agar square plates. Single colonies were counted after 1–3 d.
\ No newline at end of file
-- 
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