. 2021 Jun 23;12:680030. doi: 10.3389/fpls.2021.680030

Table 5.

Ionic and carbohydrate composition of tomato leaves grown under different nutrient conditions. Chla (b), Chlorophyll a (b); Car, carotenoids.

Component	Organic waste-based	Low-mineral	High-mineral
Inorganic ions (mmol·kg⁻¹ DW) n= 10
Na⁺	125 ± 37^a	18 ± 9^b	40 ± 43^b
${NH}_{4}^{+}$	0.4 ± 0.8^a	2 ± 1.7^b	2.1 ± 1.5^b
K⁺	217 ± 59^a	202 ± 27^a	341 ± 61^b
Ca²⁺	143 ± 46^a	106 ± 22^ab	84 ± 34^b
Mg²⁺	192 ± 43^ab	201 ± 22^a	152 ± 32^b
Cl⁻	515 ± 139^a	7 ± 2^b	6 ± 2^b
${NO}_{3}^{-}$	272 ± 100^a	66 ± 30^b	132 ± 50^b
${PO}_{4}^{3 -}$	21 ± 9^a	78 ± 11^b	99 ± 28^c
${SO}_{4}^{2 -}$	8 ± 8^a	162 ± 37^b	150 ± 37^b
Pigments (mg·g⁻¹ DW) n= 10
Chla	12.9 ± 1.0^a	11 ± 0.7^b	13.7 ± 1.4^a
Chlb	3.7 ± 0.4^a	3.2 ± 0.1^b	4.0 ± 0.4^a
Chla+Chlb	16.6 ± 1.3^a	14.2 ± 0.7^b	17.6 ± 1.7^a
Chla/Chlb	3.2 ± 0.4^a	2.6 ± 0.3^b	3.3 ± 0.3^a
Car (x+c)	3.5 ± 0.2^a	3.4 ± 0.2^a	3.5 ± 0.1^a
(Chla+Chlb)/Car	5.2 ± 0.5^a	5.6 ± 0.6^b	5.4 ± 0.2^ab
Nitrogen content (g·100 g⁻¹ DW) n= 10
N- ${NH}_{4}^{+}$	0.0007 ± 0.0004^a	0.0003 ± 0.0004^b	0.0003 ± 0.0006^b
N- ${NO}_{3}^{-}$	0.38 ± 0.14^a	0.09 ± 0.04^b	0.18 ± 0.07^b
Organic Nitrogen	2.4 ± 0.2^a	2.1 ± 0.1^ab	2.5 ± 0.2^b
Total Nitrogen	2.8 ± 0.3^a	2.2 ± 0.1^b	2.7 ± 0.3^a
Carbohydrates (mg·g⁻¹ DW) n= 8–10
Glucose	9.6 ± 2.5^a	5.0 ± 1.7^b	6.0 ± 2.2^b
Fructose	4.8 ± 1.0^a	2.8 ± 0.6^b	4.2 ± 1.1^a
Sucrose	9.7 ± 1.1^a	6.8 ± 1.6^b	7.7 ± 1.0^b
Starch	24.8 ± 12.4^a	8.8 ± 6.1^b	5.0 ± 1.2^b
Total carbohydrates	46.2 ± 13.5^a	23.5 ± 7.9^b	22.9 ± 3.6^b

Mean values ± sd are shown. Different letters indicate statistically significant differences between treatments at p = 0.05.