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Study on pollen viability and stigma receptivity throughout the flowering period in the selected taxa of the Gesneriaceae family

Françoise Jean Baptiste
Françoise Jean Baptiste
 and 
Jong-Yi Fang
Jong-Yi Fang
   | Jun 26, 2023
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Article Category: ORIGINAL ARTICLE
Published Online: Jun 26, 2023
Page range: 123 - 133
Received: Dec 03, 2022
Accepted: Jan 30, 2023
DOI: https://doi.org/10.2478/fhort-2023-0009
Keywords
© 2023 Françoise Jean Baptiste et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Figure 1

The eight gesneriad taxa used in this study. (A) Alsobia ‘Cygnet’. (B) Deinostigma eberhardtii. (C) Episcia ‘Thad’s Yellow Bird’. (D) Kohleria ‘Brimstone’. (E) Saintpaulia ‘Lyon’s Party Parasol’. (F) Sinningia ‘HCY’s Peach Fragrance’. (G) Smithiantha ‘An’s Hanabi’. (H) Streptocarpus saxorum. Bars = 1 cm.
The eight gesneriad taxa used in this study. (A) Alsobia ‘Cygnet’. (B) Deinostigma eberhardtii. (C) Episcia ‘Thad’s Yellow Bird’. (D) Kohleria ‘Brimstone’. (E) Saintpaulia ‘Lyon’s Party Parasol’. (F) Sinningia ‘HCY’s Peach Fragrance’. (G) Smithiantha ‘An’s Hanabi’. (H) Streptocarpus saxorum. Bars = 1 cm.

Figure 2

Pollen germination percentages and pollen tube lengths of Smithiantha ‘An’s Hanabi’ in different germination media. Medium specification (WG: 0C-0B-0C; A1: 10S-50B-200C; A2: 10S-50B-400C; A3: 10S-100B-200C; A4: 10S-100B-400C; B1: 20S-50B-200C; B2: 20S-50B-400C; B3: 20S-100B-200C; B4: 20S-100B-400C; C1: 30S-50B- 200C; C2: 30S-50B-400C; C3: 30S-100B-200C; C4: 30S-100B-400C; S: sucrose; B: boric acid; C: calcium nitrate). Means with identical lowercase letters are not significantly different (Duncan test, *p < 0.05). WG, water agar.
Pollen germination percentages and pollen tube lengths of Smithiantha ‘An’s Hanabi’ in different germination media. Medium specification (WG: 0C-0B-0C; A1: 10S-50B-200C; A2: 10S-50B-400C; A3: 10S-100B-200C; A4: 10S-100B-400C; B1: 20S-50B-200C; B2: 20S-50B-400C; B3: 20S-100B-200C; B4: 20S-100B-400C; C1: 30S-50B- 200C; C2: 30S-50B-400C; C3: 30S-100B-200C; C4: 30S-100B-400C; S: sucrose; B: boric acid; C: calcium nitrate). Means with identical lowercase letters are not significantly different (Duncan test, *p < 0.05). WG, water agar.

Figure 3

Pollen germination percentages of eight gesneriad taxa in different germination media. (A) Alsobia ‘Cygnet’, (B) Deinostigma eberhardtii, (C) Episcia ‘Thad’s Yellow Bird’, (D) Kohleria ‘Brimstone’, (E) Saintpaulia ‘Lyon’s Party Parasol’, (F) Sinningia ‘HCY’s Peach Fragrance’, (G) Streptocarpus saxorum, and (H) Smithiantha ‘An’s Hanabi’. Medium specification (CK: 10S-0B-0C; A1: 10S-50B-200C; A2: 10S-50B-400C; A3: 10S-100B-200C; A4: 10S-100B-400C; S: sucrose; B: boric acid; C: calcium nitrate). Means with identical lowercase letters are not significantly different (Duncan test, *p < 0.05).
Pollen germination percentages of eight gesneriad taxa in different germination media. (A) Alsobia ‘Cygnet’, (B) Deinostigma eberhardtii, (C) Episcia ‘Thad’s Yellow Bird’, (D) Kohleria ‘Brimstone’, (E) Saintpaulia ‘Lyon’s Party Parasol’, (F) Sinningia ‘HCY’s Peach Fragrance’, (G) Streptocarpus saxorum, and (H) Smithiantha ‘An’s Hanabi’. Medium specification (CK: 10S-0B-0C; A1: 10S-50B-200C; A2: 10S-50B-400C; A3: 10S-100B-200C; A4: 10S-100B-400C; S: sucrose; B: boric acid; C: calcium nitrate). Means with identical lowercase letters are not significantly different (Duncan test, *p < 0.05).

Figure 4

Pollen tube lengths of eight gesneriad taxa in different germination media. (A) Alsobia ‘Cygnet’, (B) Deinostigma eberhardtii, (C) Episcia ‘Thad’s Yellow Bird’, (D) Kohleria ‘Brimstone’, (E) Saintpaulia ‘Lyon’s Party Parasol’, (F) Sinningia ‘HCY’s Peach Fragrance’, (G) Streptocarpus saxorum, and (H) Smithiantha ‘An’s Hanabi’. Medium specification (CK: 10S-0B-0C; A1: 10S-50B-200C; A2: 10S-50B-400C; A3: 10S-100B-200C; A4: 10S-100B-400C; S: sucrose; B: boric acid; C: calcium nitrate). Means with a common lowercase letter are not significantly different (Duncan test, *p < 0.05).
Pollen tube lengths of eight gesneriad taxa in different germination media. (A) Alsobia ‘Cygnet’, (B) Deinostigma eberhardtii, (C) Episcia ‘Thad’s Yellow Bird’, (D) Kohleria ‘Brimstone’, (E) Saintpaulia ‘Lyon’s Party Parasol’, (F) Sinningia ‘HCY’s Peach Fragrance’, (G) Streptocarpus saxorum, and (H) Smithiantha ‘An’s Hanabi’. Medium specification (CK: 10S-0B-0C; A1: 10S-50B-200C; A2: 10S-50B-400C; A3: 10S-100B-200C; A4: 10S-100B-400C; S: sucrose; B: boric acid; C: calcium nitrate). Means with a common lowercase letter are not significantly different (Duncan test, *p < 0.05).

Figure 5

Daily pollen germination percentages throughout the entire flowering period of eight gesneriad taxa. (A) Alsobia ‘Cygnet’, (B) Deinostigma eberhardtii, (C) Episcia ‘Thad’s Yellow Bird’, (D) Kohleria ‘Brimstone’, (E) Saintpaulia ‘Lyon’s Party Parasol’, (F) Sinningia ‘HCY’s Peach Fragrance’, (G) Streptocarpus saxorum, and (H) Smithiantha ‘An’s Hanabi’. Means with a common lowercase letter are not significantly different (Duncan test, *p < 0.05).
Daily pollen germination percentages throughout the entire flowering period of eight gesneriad taxa. (A) Alsobia ‘Cygnet’, (B) Deinostigma eberhardtii, (C) Episcia ‘Thad’s Yellow Bird’, (D) Kohleria ‘Brimstone’, (E) Saintpaulia ‘Lyon’s Party Parasol’, (F) Sinningia ‘HCY’s Peach Fragrance’, (G) Streptocarpus saxorum, and (H) Smithiantha ‘An’s Hanabi’. Means with a common lowercase letter are not significantly different (Duncan test, *p < 0.05).

Figure 6

Daily pollen tube lengths throughout the flowering period of eight gesneriad taxa. (A) Alsobia ‘Cygnet’, (B) Deinostigma eberhardtii, (C) Episcia ‘Thad’s Yellow Bird’, (D) Kohleria ‘Brimstone’, (E) Saintpaulia ‘Lyon’s Party Parasol’, (F) Sinningia ‘HCY’s Peach Fragrance’, (G) Streptocarpus saxorum, and (H) Smithiantha ‘An’s Hanabi’. Means with a common lowercase letter are not significantly different (Duncan test, *p < 0.05).
Daily pollen tube lengths throughout the flowering period of eight gesneriad taxa. (A) Alsobia ‘Cygnet’, (B) Deinostigma eberhardtii, (C) Episcia ‘Thad’s Yellow Bird’, (D) Kohleria ‘Brimstone’, (E) Saintpaulia ‘Lyon’s Party Parasol’, (F) Sinningia ‘HCY’s Peach Fragrance’, (G) Streptocarpus saxorum, and (H) Smithiantha ‘An’s Hanabi’. Means with a common lowercase letter are not significantly different (Duncan test, *p < 0.05).

Figure 7

Stigma morphology of eight gesneriad taxa. Dry stigmas of (A) Alsobia ‘Cygnet’, (B) Deinostigma eberhardtii, (C) Episcia ‘Thad’s Yellow Bird’, (D) Kohleria ‘Brimstone’, (E) Sinningia ‘Mark Twain’, and (F) Smithiantha ‘An’s Hanabi’ at Day 8–10 of flowering. Wet stigmas of (G) Streptocarpus saxorum and (H) Saintpaulia ‘Lyon’s Party Parasol’ at Day 1 of flowering. Bars = 1 cm.
Stigma morphology of eight gesneriad taxa. Dry stigmas of (A) Alsobia ‘Cygnet’, (B) Deinostigma eberhardtii, (C) Episcia ‘Thad’s Yellow Bird’, (D) Kohleria ‘Brimstone’, (E) Sinningia ‘Mark Twain’, and (F) Smithiantha ‘An’s Hanabi’ at Day 8–10 of flowering. Wet stigmas of (G) Streptocarpus saxorum and (H) Saintpaulia ‘Lyon’s Party Parasol’ at Day 1 of flowering. Bars = 1 cm.

Figure 8

Daily pistil lengths throughout the flowering period of eight gesneriad taxa. (A) Alsobia ‘Cygnet’, (B) Deinostigma eberhardtii, (C) Episcia ‘Thad’s Yellow Bird’, (D) Kohleria ‘Brimstone’, (E) Saintpaulia ‘Lyon’s Party Parasol’, (F) Sinningia ‘Mark Twain’, (G) Streptocarpus saxorum, and (H) Smithiantha ‘An’s Hanabi’. Means with a common lowercase letter are not significantly different (Duncan test, *p < 0.05).
Daily pistil lengths throughout the flowering period of eight gesneriad taxa. (A) Alsobia ‘Cygnet’, (B) Deinostigma eberhardtii, (C) Episcia ‘Thad’s Yellow Bird’, (D) Kohleria ‘Brimstone’, (E) Saintpaulia ‘Lyon’s Party Parasol’, (F) Sinningia ‘Mark Twain’, (G) Streptocarpus saxorum, and (H) Smithiantha ‘An’s Hanabi’. Means with a common lowercase letter are not significantly different (Duncan test, *p < 0.05).
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