Table 1.

Water content (% fresh weight) of barley plants grown in control or K‐free (−K) media

Daya	Shoot water content (% FW)
	Control	−K	P valueb
3	90.6	92.6	0.196
6	91.5	89.5	0.169
9	91.9	90.5	0.342
12	92.7	92.0	0.499
15	91.7	90.3	0.444

Leaf regionc	Tissue water content (% FW)
	Control	−K	P valued
Tip	90.1	86.4	0.043
Middle	91.4	90.7	0.334
Base	92.1	91.5	0.225
P valued	0.217	0.004

^aAfter transfer to hydroponics.

^bDifference of water content in different media.

^cSecond leaf, as described in Section 2.

^dDifference of water content in different leaf segments.