Table 1. Fold Changes of 25 Transcripts That Are Candidates for Systemic Regulation in Roots, as Identified in Microarray Analyses in This Study.

Probe Set ID	hma2 hma4 vs. WT Fold Changea	WT −Zn vs. WT Control Fold Change	Locus	Gene Name	Annotation	Putative Function
259556_at	23	3.2	AT1G21300	–	Transposable element gene	Not assigned
250904_at	9.4	2.4	AT5G03620	–	Subtilisin-like serine endopeptidase	Proteolytic activity
255239_at	7.1	4.8	AT4G05580	–	Transposable element gene	Not assigned
265094_at	6.7	3.5	AT1G03890	–	RmlC-like cupin	Nutrient reservoir
245779_at	6.3	8.3	AT1G73510	–	Unknown protein	Not assigned
251294_at	6.2	1283	AT3G61940	MTP2	Efflux transmembrane transporter/ zinc ion transmembrane transporter	Zinc ion transport
258301_at	5.8	13.0	AT3G30510	–	Transposable element gene	Not assigned
256586_at	5.8	7.6	AT3G28770	–	Unknown protein	Not assigned
257458_at	5.7	4.9	AT2G05400	–	Meprin and TRAF homology domain-containing protein	Ubiquitin-specific proteolysis
267334_at	5.7	5.3	AT2G19420	–	Unknown protein	Not assigned
256544_at	5.6	4.0	AT1G42560	MLO9	Mildew resistance locus O 9	Calmodulin binding in pathogen response
252865_at	5.5	6.1	AT4G39753	–	Galactose oxidase/kelch repeat superfamily protein	Protein regulation via E3 ubiquitin ligase complex
265199_s_at	5.4	4.6	AT2G36780	–	UDP-glucoronosyl/UDP-glucosyl transferase family protein	Transfer of glucose to flavonol, required for anthocyanin biosynthesis
266726_at	4.7	3.9	AT2G03160	ASK19	Ubiquitin-protein ligase	Transfer of ubiquitin to proteins targeted for degradation
263645_at	4.4	4.7	AT2G04720	–	Pseudogene, GTP-binding protein-related, similar to GTP-binding protein	Not assigned
245890_at	3.9	3.3	AT5G09490	RPS15B	Ribosomal protein	Ribosome component
260188_at	3.1	5.0	AT1G35995	–	Transposable element gene	Not assigned
253894_at	2.4	4.4	AT4G27150	NWMU2-2S	2S seed storage protein 2, 2S albumin storage protein 2	Nutrient reservoir
259332_at	2.2	7.1	AT3G03830	–	SAUR-like auxin-responsive protein family	Developmental responses
250699_at	0.1	0.2	AT5G06820	SRF2	Strubbelig receptor family 2	transmembrane receptor, protein tyrosine kinase signaling pathway
263674_at	0.1	0.3	AT2G04790	–	Unknown protein	Not assigned
263905_at	0.2	0.3	AT2G36190	ATCWINV4	Hydrolase, hydrolyzing O-glycosyl compounds	Involved in sugar catabolism
255609_s_at	0.2	0.2	AT4G01180	–	XH/XS-domain-containing protein	Not assigned
248812_at	0.2	0.2	AT5G47330	–	Palmitoyl protein thioesterase family protein	Involved in lipid catabolism
255970_s_at	0.2	0.1	AT3G31540	–	Transposable element gene

Shown are means of two independent replicate experiments. Entities were considered regulated if log₂(fold change) > 1 or < −1 in both experiments and significant using a Mann-Whitney unpaired, corrected P value < 0.2. –, Not assigned.

^aGrown in control conditions.