Table 1. Analyses of the reads obtained from the four libraries (root control, root stressed, leaf control, and leaf stressed).

Reads	Root	Leaf
Number of reads	606,396	619,131
Number of bases	366,686,703	345,617,595
Reads in control condition	305,731	319,997
Number of bases in control condition	184,485,642	177,132,266
Average read length	603,425	553,544
Reads in drought condition	300,665	299,134
Number of bases in drought condition	182,201,061	168,485,369
Average read length	605,994	563,244
Fully assembled	453,218	519,150
Partially assembled	90,933	65,475
Singletons	40,377	31,374
Repeat	17,257	189
Outlier	4,179	2,806
Too short	345	135
Number of isogroups	24,900	16,585
Average contig count	1.5	1.4
Number of isogroups with one isotig	20,969	14,592
Number of isotigs	32,085	19,899
Average isotig size	1085,508	952.03
N50 isotig size	1,299	1,115
Valid singletons	37,457	28,880

Isogroup is the collection of contigs containing reads that imply connections between them. Isotig is analogous to an individual transcript.