Table 2.

Analysis of phenotypes and vitality of pollen collected from healthy and viroid-infected tobacco genotypes.

	Parameters of Vitality ${}^{\mathit{a}}$
Genotypes	Young Bicellular [% ± SD]	Aborted Pollen [% ± SD]	Mass of Pollen Tubes [mg ± SD]	Length of Pollen Tubes [μm ± SD]
AFCVd-infected ${}^b$	n.d. ${}^c$	2.45 ± 0.95	6.75 ± 0.71	1027 ± 362
Control ${}^b$	n.d.	3.87 ± 0.85	6.13 ±1.21	877 ±386
35S:AFCVd/infected ${}^d$	n.d.	9.77 ± 3.28	9.05 ± 0.84	895 ± 257
Control ${}^d$	n.d.	3.87 ± 0.85	6.95 ± 0.36	1084 ± 405
LAT52:AFCVd/infected ${}^d$	2.51 ± 0.57	6.32 ± 1.34	8.27 ± 2.19	999 ± 328
Control ${}^d$	2.05 ± 1.41	3.74 ± 1.15	10.52 ± 3.05	948 ± 300
35S:CBCVd/infected ${}^d$	1.17 ± 0.46	6.19 ± 2.05	6.30 ± 0.37	784 ± 273
Control ${}^d$	0.94 ± 0.41	3.68 ± 1.40	7.07 ± 0.74	1040 ± 325

${}^a$ Mass of pollen tubes germinating from 1 mg of mature pollen. See Figure 4 for pollen phenotypes. Mean values ± SD are given. ${}^b$ Non-transformed tobacco, AFCVd infected with the biolistic method; comparison with healthy controls. ${}^c$ Not determined. ${}^d$ Transformed/infected plants with the corresponding infectious plant vectors are shown; comparison with healthy controls.