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Table 1 Description of embryonic and larval stages used for the transcriptomic and amino acid content analyses

From: Tyrosine pathway regulation is host-mediated in the pea aphid symbiosis during late embryonic and early larval development

 

Group

Group abbreviation

Developmental stages

Size (length or weight)

External morphological features

Embryos

Early embryos

EE

0-15

≤ 400 μm

*No visible eyes *Very slight body pigmentation

Intermediate embryos

IE

16-18

400-800 μm

*Developing eye spots in many individuals *Pigmented bodies

 

Late embryos

LE

19-20

> 800 μm

*Developed eye spots in all individuals *Highly pigmented bodies

Larvae

First instar larvae

L1

1st larval

≤ 0.2 mg

0-24 hours old

L1 early

≤ 6 hours old

  

L1 late

  

≥ 15 hours old

  1. Assignment of embryos to the three groups (EE, IE or LE) was based on size range and on morphological criteria detailed in this table (see Figure 1A for exemplary microphotographs). The developmental stages were defined according to Miura et al.[13]. Larval stages were determined according to the development time after laying.