Dissection of early transcriptional responses to water stress in Arundo donax L. by unigene-based RNA-seq

Table 2 Comparison between A. donax water stress response genes and rice drought response network

Rice module	Rice genes	Putative orthologs in A. donax	Putative orthologs in A. donax shoot DEGs (p value)	Putative orthologs in A. donax root DEGs (p value)	Putative module function
Module 1	303	149	2	8
Module 2	213	155	5	4
Module 3	141	61	1	0
Module 4	134	35	2	3
Module 5	117	71	2	2
Module 6	90	29	4	0
Module 7	77	46	22 (4.89E−15)	12 (3.66E−07)	Hormonal signal transduction
Module 8	48	18	0	0
Module 9	47	16	3	2
Module 10	47	27	8 (3.22E−4)	0	Post-translational protein modification
Module 11	46	11	0	0
Module 12	42	11	0	0
Module 13	38	13	0	0
Module 14	28	17	6 (5.42E−4)	8 (3.53E−07)	Stomatal closure
Module 15	21	11	1	0

A total of 56 (in shoot) and 39 (in root) A. donax DEGs for which rice orthologs could be identified are mapped onto the 15 co-expression modules previously identified in rice [70]. Significance levels for over- and under-representation as compared to rice (p-value) are provided
There are 1392 rice genes in the 15 modules. Based on Blastp reciprocal best hits method, a total of 56 and 39 differentially expressed genes were identified as putative orthologs of rice genes in shoot and root of A. donax, respectively

ISSN: 2731-3654