diff --git a/assays/leaf_sampling/README.md b/assays/leaf_sampling/README.md
deleted file mode 100644
index 6bbd3ce33f7d7ed2c4f0b633bc16e66e2244fbcd..0000000000000000000000000000000000000000
--- a/assays/leaf_sampling/README.md
+++ /dev/null
@@ -1,10 +0,0 @@
-## leaf_sampling
-
-**Assay used in studies:**
-- gene_expression_eam7_plants_development
-- gene_expression_eam7_plants_diurnal
-- gene_expression_lwd1_mutants_diurnal
-
-**Info:**
-
-No dataset, as leaf samples were used in downstream assays (RNA_extraction).
\ No newline at end of file
diff --git a/assays/leaf_sampling/dataset/.gitkeep b/assays/leaf_sampling/dataset/.gitkeep
deleted file mode 100644
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..0000000000000000000000000000000000000000
diff --git a/assays/leaf_sampling/isa.assay.xlsx b/assays/leaf_sampling/isa.assay.xlsx
deleted file mode 100644
index 52c17f906eb38d3aa9a7368cbfb57c1a1a024132..0000000000000000000000000000000000000000
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diff --git a/assays/leaf_sampling/protocols/.gitkeep b/assays/leaf_sampling/protocols/.gitkeep
deleted file mode 100644
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..0000000000000000000000000000000000000000
diff --git a/assays/leaf_sampling/protocols/leaf_sampling.md b/assays/leaf_sampling/protocols/leaf_sampling.md
deleted file mode 100644
index 340a6ba698f0536ac0015b06f4676abe0bce2f5e..0000000000000000000000000000000000000000
--- a/assays/leaf_sampling/protocols/leaf_sampling.md
+++ /dev/null
@@ -1,8 +0,0 @@
-## Leaf sampling for RNA extraction
-
--	place two 3 mm metal beads into 2.0 ml tube
--	always sample the youngest, fully elongated leaf (auricles are clearly visible)
--	sample three biological replicates for each genotype and time point
--	for each biological replicate: pool the leaf from two plants into one tube
--	freeze samples directly in liquid nitrogen
--	Store samples at -80°C until needed
\ No newline at end of file
diff --git a/isa.investigation.xlsx b/isa.investigation.xlsx
index f548dc7d17a0a7bf4542ea53826ab90018f90d39..17b1672bef326326666f501b2d21813b2134117b 100644
Binary files a/isa.investigation.xlsx and b/isa.investigation.xlsx differ
diff --git a/studies/gene_expression_eam7_plants_development/isa.study.xlsx b/studies/gene_expression_eam7_plants_development/isa.study.xlsx
index 55496c492e6f2debcfa908ea533bf8378a46012e..8c133ad03f254ad38af35071060111e6e6d4cdfe 100644
Binary files a/studies/gene_expression_eam7_plants_development/isa.study.xlsx and b/studies/gene_expression_eam7_plants_development/isa.study.xlsx differ
diff --git a/studies/gene_expression_eam7_plants_development/protocols/development_plant_material_growth_conditions.md b/studies/gene_expression_eam7_plants_development/protocols/development_plant_material_growth_conditions.md
index 6ae4939b666963e088ac3369fc81352c98365a83..4a9c375cbe002b3c9e690b8b1c852b10061b8ea5 100644
--- a/studies/gene_expression_eam7_plants_development/protocols/development_plant_material_growth_conditions.md
+++ b/studies/gene_expression_eam7_plants_development/protocols/development_plant_material_growth_conditions.md
@@ -18,9 +18,15 @@ Genotypes:
 - QuickPot E24/10 trays (HerkuPlast Kubern GmbH, pot volume 480 cm^3)
 - Einheitserde ED73 (Einheitserde Werkverband e.V.) with 7% sand and 4 g/L Osmocote Exact Hi.End 3-4M, 4th generation (ICL Group Ltd.)
 
-**Sampling:**
+**Leaf sampling for RNA extraction:**
+
+- place two 3 mm metal beads into 2.0 ml tube
+- always sample the youngest, fully elongated leaf (auricles are clearly visible)
+- sample three biological replicates for each genotype and time point
+- for each biological replicate: pool the leaf from two plants into one tube
+- freeze samples directly in liquid nitrogen
+- Store samples at -80°C until needed
 
-- always sample youngest, fully elongated leaf
 - sample at ZT 9 (1h after lights turned off, as FT1 expression is highest)
 - sample genotypes at 19, 26, 33, 40, 47 and 59 DAE
 
diff --git a/studies/gene_expression_eam7_plants_diurnal/isa.study.xlsx b/studies/gene_expression_eam7_plants_diurnal/isa.study.xlsx
index a063310508b766fbbe3bba86a62a76c9510c8248..d9f14729d51974633b8dbd5075b31a3608f73116 100644
Binary files a/studies/gene_expression_eam7_plants_diurnal/isa.study.xlsx and b/studies/gene_expression_eam7_plants_diurnal/isa.study.xlsx differ
diff --git a/studies/gene_expression_eam7_plants_diurnal/protocols/diurnal_plant_material_growth_conditions.md b/studies/gene_expression_eam7_plants_diurnal/protocols/diurnal_plant_material_growth_conditions.md
index 35f54b32799f6174ae8a1f7aa5f9f8fc643975d4..deb2017c7f42ae1b0d0a3c2007a87ecefb2d1d6b 100644
--- a/studies/gene_expression_eam7_plants_diurnal/protocols/diurnal_plant_material_growth_conditions.md
+++ b/studies/gene_expression_eam7_plants_diurnal/protocols/diurnal_plant_material_growth_conditions.md
@@ -19,7 +19,17 @@ Genotypes:
 - Einheitserde ED73 (Einheitserde Werkverband e.V.) with 7% sand and 4 g/L Osmocote Exact Hi.End 3-4M, 4th generation (ICL Group Ltd.)
 
 
-**Sampling:**
+**Leaf sampling for RNA extraction:**
+
+- place two 3 mm metal beads into 2.0 ml tube
+- always sample the youngest, fully elongated leaf (auricles are clearly visible)
+- sample three biological replicates for each genotype and time point
+- for each biological replicate: pool the leaf from two plants into one tube
+- freeze samples directly in liquid nitrogen
+- Store samples at -80°C until needed
+
+- sample at ZT 9 (1h after lights turned off, as FT1 expression is highest)
+- sample genotypes at 19, 26, 33, 40, 47 and 59 DAE
 
 - 2 weeks old plants
 - youngest, fully elongated leaf: leaf 2
diff --git a/studies/gene_expression_lwd1_mutants_diurnal/README.md b/studies/gene_expression_lwd1_mutants_diurnal/README.md
index 860900778e5c515f1f5b594f195bc2195033dffe..7439a5fb3f84781b8eae541522f7d02736c29f83 100644
--- a/studies/gene_expression_lwd1_mutants_diurnal/README.md
+++ b/studies/gene_expression_lwd1_mutants_diurnal/README.md
@@ -8,7 +8,7 @@ Gene expression of *CO1, ELF3, FT1, LUX1, LWD1, PHYB, PHYC, Ppd-H1*, and *PRR1*
 
 ```mermaid
 	flowchart TD;
-	A[lwd1 mutants and GP-fast] --> |leaf_sampling| B[frozen leaf tissues, 3 biol. replicates]
+	A[lwd1 mutants and GP-fast] --> |plant growth and leaf sampling| B[frozen leaf tissues, 3 biol. replicates]
 	B --> |RNA_extraction| C[RNA samples]
 	C --> |cDNA_synthesis| D[cDNA samples]
 	D --> |qRT-PCR| E[gene expression data, 2 techn. replicates]
diff --git a/studies/gene_expression_lwd1_mutants_diurnal/isa.study.xlsx b/studies/gene_expression_lwd1_mutants_diurnal/isa.study.xlsx
index 4d00176afb847ed396a1ff37f9f1c83c1d0c973f..f4923256c28fc797f532f750b4ca5af4ca1a455a 100644
Binary files a/studies/gene_expression_lwd1_mutants_diurnal/isa.study.xlsx and b/studies/gene_expression_lwd1_mutants_diurnal/isa.study.xlsx differ
diff --git a/studies/gene_expression_lwd1_mutants_diurnal/protocols/diurnal_plant_material_growth_conditions.md b/studies/gene_expression_lwd1_mutants_diurnal/protocols/diurnal_plant_material_growth_conditions.md
index d2ab6197d63642e71255be1c19721a509519a235..98ee71e1c2fd3e9d2eddfed4d911de0a7d68c4d9 100644
--- a/studies/gene_expression_lwd1_mutants_diurnal/protocols/diurnal_plant_material_growth_conditions.md
+++ b/studies/gene_expression_lwd1_mutants_diurnal/protocols/diurnal_plant_material_growth_conditions.md
@@ -20,7 +20,17 @@ Genotypes:
 - Einheitserde ED73 (Einheitserde Werkverband e.V.) with 7% sand and 4 g/L Osmocote Exact Hi.End 3-4M, 4th generation (ICL Group Ltd.)
 
 
-**Sampling:**
+**Leaf sampling for RNA extraction:**
+
+- place two 3 mm metal beads into 2.0 ml tube
+- always sample the youngest, fully elongated leaf (auricles are clearly visible)
+- sample three biological replicates for each genotype and time point
+- for each biological replicate: pool the leaf from two plants into one tube
+- freeze samples directly in liquid nitrogen
+- Store samples at -80°C until needed
+
+- sample at ZT 9 (1h after lights turned off, as FT1 expression is highest)
+- sample genotypes at 19, 26, 33, 40, 47 and 59 DAE
 
 - 2 weeks old plants
 - youngest, fully elongated leaf: leaf 2