Table 2.

Macronutrient concentration (mg kg⁻¹ dry weight) in roots, stems and leaves of H. lanatus and D. tenuifolia. Values are means ± standard deviation (SD). Between treatments means with the same letter are not significantly different at Tukey’s test (p ≤ 0.05). In mean comparison between species, ns is not significant at p ≤ 0.05, *, and *** indicate significance at p ≤ 0.05, and p ≤ 0.001.

Treatment	K		Mg		Na		P
	H. lanatus	D. tenuifolia	H. lanatus	D. tenuifolia	H. lanatus	D. tenuifolia	H. lanatus	D. tenuifolia
	Roots
Ctrl	5500 ± 657a	14,777 ± 743a	633 ± 81.8a	1302 ± 87.4a	331 ± 79.8b	187 ± 98.7a	1224 ± 136a	6669 ± 840a
nCeO2 25 nm	6869 ± 1352a	13,288 ± 2805a	588 ± 35.4ab	1551 ± 334a	390 ± 125ab	249 ± 123a	1465 ± 125a	5969 ± 1487a
nCeO2 50 nm	5881 ± 791a	16,545 ± 2015a	490 ± 33.5b	1780 ± 355a	686 ± 191a	406 ± 100a	1363 ± 108a	7659 ± 742 a
Mean	6084 ± 1047	14,870 ± 2413 ***	570 ± 79.2	1544 ± 337 ***	469 ± 204	281 ± 129 *	1351 ± 150	6766 ± 1230 ***
	Stems
Ctrl	28,927 ± 2252a	23,694 ± 2802a	1032 ± 110a	1014 ± 394a	115 ± 11.7ab	265 ± 142a	2836 ± 287a	3431 ± 737a
nCeO2 25 nm	31,580 ± 2978a	22,466 ± 3856a	1114 ± 10.4a	878 ± 277a	95.5 ± 9.12b	318 ± 29.6a	2524 ± 167a	2875 ± 9.76a
nCeO2 50 nm	32,065 ± 3806a	26,355 ± 663a	1117 ± 37.7a	932 ± 208a	128 ± 15.2a	519 ± 267a	2668 ± 291a	3402 ± 661a
Mean	30,857 ± 3041	24,172 ± 2964 ***	1088 ± 71.9	941 ± 194ns	113 ± 17.8	368 ± 176 ***	2676 ± 259	3234 ± 437 *
	Leaves
Ctrl	31,314 ± 2192a	30,115 ± 4571a	1547 ± 80.9a	2312 ± 313a	150 ± 46.6a	1249 ± 325a	3671 ± 462a	3138 ± 628a
nCeO2 25 nm	32,772 ± 2096a	22,672 ± 3176a	1397 ± 51.9a	2459 ± 94.6a	81 ± 16.8a	803 ± 219a	3335 ± 401a	2677 ± 429a
nCeO2 50 nm	31,610 ± 1854a	30,057 ± 3631a	1508 ± 13.2a	2267 ± 229a	126 ± 77.6a	1094 ± 206a	3163 ± 473a	3719 ± 388a
Mean	31,899 ± 1836	27,615 ± 5106 *	1455 ± 68.2	2346 ± 192 ***	119 ± 55.1	1049 ± 296 ***	3390 ± 447	3178 ± 664ns