Table 3.

Absolute concentrations (nmol µL⁻¹) of amino acids in the ovular secretions

	Asp	Ser	Glu	Gly	His	Arg	Thr	Ala	Pro	Val	Lys	Ile	Leu	HPro	Gln	β-Ala	GABA	TAC	Prot	NoProt	Ess	NoEss
Gb		0.19 ± 0.09			0.15 ± 0.06				2.01 ± 0.93	0.11 ± 0.03			0.20 ± 0.08		0.20 ± 0.09	1.44 ± 0.47		4.35 ± 1.19	2.90 ± 1.29	1.44 ± 0.47	0.51 ± 0.18	2.4 ± 1,1
Zf								0.03								0.03		0.06	0.03	0.03		0.03
Ck		9.05	8.69	0.30	0.20		0.18	1.46	6.43	0.80		0.07	0.05					27.47	27.47		1.50	25.97
Cl		1.06 ± 0.51		0.05 ± 0.03	0.12 ± 0.05		0.03 ± 0.3	0.15 ± 0.08	5.19 ± 1.01	0.06 ± 0.051		0.10 ± 0.06	0.14 ± 0.04	0.19 ± 0.06	2.21 ± 0.77	0.02 ± 0.04		10.04 ± 1.74	9.74 ± 1.68	0.30 ± 0.06	0.51 ± 0.2	9.23 ± 1.49
Jc		0.46 ± 0.16	0.11 ± 0.04	0.28 ± 0.1			1.69 ± 0.58	0.18 ± 0.06	20.61 ± 5.30			0.13 ± 0.04	0.12 ± 0.06					23.58 ± 4.90	23.58 ± 4.90		1.94 ± 0.50	21.64 ± 5.40
Jo		1.64 ± 0.72	1.17 ± 0.41	0.12 ± 0.08			0.53 ± 0.21	0.08 ± 0.08	20.24 ± 6.30			0.08 ± 0.05	0.55 ± 0.26					24.42 ± 6.3	24.42 ± 6.3		1.17 ± 0.18	23.25 ± 6.39
Tb	0.70 ± 0.35	0.93 ± 0.47		0.12 ± 0.06	0.75 ± 0.34	0.11 ± 0.07	0.11 ± 0.08	1.23 ± 0.48	9.15 ± 2.98	0.13 ± 0.06		0.06 ± 0.05	0.03 ± 0.05	0.04 ± 0.05	3.31 ± 0.97	0.04 ± 0.04	0.12 ± 0.08	17.33 ± 5.77	17.04 ± 5.69	0.29 ± 0.11	1.57 ± 0.87	15.47 ± 5.11
Lm	5.73 ± 2.90	9.89 ± 4.60	26.35 ± 8.62	0.98 ± 0.38	25.03 ± 10.63	1.37 ± 0.70	2.19 ± 1.12	9.55 ± 4.53	6.02 ± 3.65		0.22 ± 0.09		0.68 ± 0.36					89.69 ± 5.98	89.69 ± 5.98		30.68 ± 13.41	59.01 ± 7.43
Pm	4.96 ± 2.23	11.70 ± 2.75	12.26 ± 4.55		4.60 ± 1.78	1.34 ± 0.56	2.65 ± 1.41	5.88 ± 2.47	30.27 ± 8.83	1.90 ± 0.65	1.83 ± 0.56	2.39 ± 0.63						82.36 ± 27.9	82.36 ± 27.9		15.14 ± 5.81	67.22 ± 22.09
Efm		0.63 ± 0.16						0.50 ± 0.12								1.96 ± 0.43		3.09 ± 072	1.13 ± 0.29	1.96 ± 0.43		1.13 ± 0.29
Em		0.17							2.07	0.03						0.71		3.00	2.29	0.71	0.05	2.24
Ggf	5.44	73.18	6.37	34.78	27.55			0.02	0.04									14.74	14.74		2.76	11.98
Ggm	0.45	2.32		0.16	0.39	0.48	0.19	0.69	0.22	0.27	0.39	0.22	0.29		0.34	0.24	0.32	7.24	6.40	0.84	2.23	4.17
Wm, f								1.92	2.11					2.45		0.51		6.99	4.03	2.96		4.03
Wm, m		1.62			1.79	2.06		0.22	0.66	0.06	0.13		0.03	3.07	0.21	0.20	0.16	10.23	6.8	3.43	4.09	2.71

For Gnetum gnemon and Welwitschia mirabilis, ovular secretions from functional ovules of ovulate individuals (f) and from sterile ovules of staminate individuals (m) were analysed. Non-essential protein amino acids are in Roman characters, essential protein amino acids are in bold characters and non-protein amino acids are in italics. Amino acids with concentration <2 % of total amino acid concentration in all species are not reported.

Prot, total protein amino acids concentration; NoProt, total non-protein amino acids concentration; Ess, total essential amino acids concentration; NoEss, total non-essential amino acids concentration. B-Ala, β-alanine; HPro, hydroxyproline. All other amino acids are indicated with standard abbreviations. Abbreviations of taxa are as in Table 1.