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Gibberellic acid and 6-benzyladenine reduce time to flowering and improve flower quality of Laelia anceps

Olga Tejeda-Sartorius
Olga Tejeda-Sartorius
, 
Humberto Vaquera-Huerta
Humberto Vaquera-Huerta
, 
Libia Iris Trejo-Téllez
Libia Iris Trejo-Téllez
, 
Ramón Marcos Soto-Hernández
Ramón Marcos Soto-Hernández
 et 
Julio Sánchez-Escudero
Julio Sánchez-Escudero
   | 17 avr. 2021
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Article Category: Original Article
Publié en ligne: 17 avr. 2021
Pages: 121 - 133
Reçu: 22 déc. 2020
Accepté: 08 mars 2021
DOI: https://doi.org/10.2478/fhort-2021-0009
Mots clés
© 2021 Olga Tejeda-Sartorius et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Figure 1

Average D/T and N/T;°C, percentage of D/RH and N/RH, and PPF; μmmol · m−2 · s−1, by experimental period (2017 to 2019). D/T, day-time temperature; D/RH, day-time relative humidity; N/T, nights temperatures; N/RH, night relative humidity; PPF, photosynthetic photon flux.
Average D/T and N/T;°C, percentage of D/RH and N/RH, and PPF; μmmol · m−2 · s−1, by experimental period (2017 to 2019). D/T, day-time temperature; D/RH, day-time relative humidity; N/T, nights temperatures; N/RH, night relative humidity; PPF, photosynthetic photon flux.

Figure 2

Percentage of visible floral induction of L. anceps in three experimental periods, by effect of different doses of BA and GA3. BA, 6-benzyladenine; GA3, gibberellic acid. *Indicates an abortion in treatment.
Percentage of visible floral induction of L. anceps in three experimental periods, by effect of different doses of BA and GA3. BA, 6-benzyladenine; GA3, gibberellic acid. *Indicates an abortion in treatment.

Figure 3

Survival curves represent the proportion of L. anceps plants induced to flowering per day, with the effect of different doses of PGRs: GA3 and BA, in three experimental periods. Differences in the survival curves are significant with the log-rank test (p ≤ 0.05). BA, 6-benzyladenine; GA3, gibberellic acid; PGRs, plant growth regulators.
Survival curves represent the proportion of L. anceps plants induced to flowering per day, with the effect of different doses of PGRs: GA3 and BA, in three experimental periods. Differences in the survival curves are significant with the log-rank test (p ≤ 0.05). BA, 6-benzyladenine; GA3, gibberellic acid; PGRs, plant growth regulators.

Figure 4

Survival curves represent the proportion of L. anceps plants that reached anthesis per day, in each experimental period (A), and by effect of treatments in the global analysis period (B), with the application of different doses of PGRs: GA3 and BA. Differences in the survival curves are significant with the log-rank test (p ≤ 0.05). BA, 6-benzyladenine; GA3, gibberellic acid; PGRs, plant growth regulators.
Survival curves represent the proportion of L. anceps plants that reached anthesis per day, in each experimental period (A), and by effect of treatments in the global analysis period (B), with the application of different doses of PGRs: GA3 and BA. Differences in the survival curves are significant with the log-rank test (p ≤ 0.05). BA, 6-benzyladenine; GA3, gibberellic acid; PGRs, plant growth regulators.

Figure 5

Survival curves represent the proportion of L. anceps plants that reached anthesis daily, in each experimental period: 2017 (A), 2018 (B) and 2019 (C), by the effect of different doses of PGRs: GA3 and BA. Differences in the survival curves are significant with the log-rank test (p ≤ 0.05). BA, 6-benzyladenine; GA3, gibberellic acid; PGRs, plant growth regulators.
Survival curves represent the proportion of L. anceps plants that reached anthesis daily, in each experimental period: 2017 (A), 2018 (B) and 2019 (C), by the effect of different doses of PGRs: GA3 and BA. Differences in the survival curves are significant with the log-rank test (p ≤ 0.05). BA, 6-benzyladenine; GA3, gibberellic acid; PGRs, plant growth regulators.

Figure 6

Survival curves represent the proportion of L. anceps plants with live flowers per day, in each experimental period (A), and by effect of treatments in the period 2017 (B), with the application of different doses of PGRs: GA3 and BA. Differences in the survival curves are significant with the log-rank test (p ≤ 0.05). BA, 6-benzyladenine; GA3, gibberellic acid; PGRs, plant growth regulators.
Survival curves represent the proportion of L. anceps plants with live flowers per day, in each experimental period (A), and by effect of treatments in the period 2017 (B), with the application of different doses of PGRs: GA3 and BA. Differences in the survival curves are significant with the log-rank test (p ≤ 0.05). BA, 6-benzyladenine; GA3, gibberellic acid; PGRs, plant growth regulators.

Means of morpho-floral quality parameters between one experimental period and the next, by the application of different doses of BA (mg · L−1) and GA3 (mg · L−1) in L. anceps.

PGRs Doses Flower life Number of flowers stem Length of flower Width of flower
2017 2018 2019 2017 2018 2019 2017 2018 2019 2017 2018 2019
BA 9.5 21.50 a 24.75 a 25.00 a 1.17 a 1.75 a 1.88 a 7.82 a 9.13 a 8.73 a 8.28 a 7.35 a 6.98 a
19.0 26.06 a 22.25 a 24.25 a 1.32 b 2.38 a 1.91 ab 8.57 a 9.48 a 9.41 a 9.03 a 7.56 b 6.93 b
28.5 25.31 a 21.25 a 19.88 a 0.94 b 2.00 a 2.13 a 11.05 a 8.45 b 8.46 b 8.75 a 7.56 ab 6.85 b
GA3 400 26.14 a 25.31 ab 18.86 b 1.99 a 1.82 a 1.57 a 10.13 a 9.93 a 9.39 a 7.62 a 7.85 a 7.46 a
600 22.63 a 20.57 a 20.00 a 1.25 b 2.52 a 1.82 b 9.80 a 9.47 a 8.78 a 7.83 a 7.65 a 7.59 a
800 23.71 ab 25.57 a 19.57 b 1.43 a 1.86 a 1.71 a 8.91 ab 8.21 b 9.34 a 6.69 a 6.83 a 7.04 a
BA + GA3 2.37 + 100 26.25 a 19.15 b 18.35 b 1.88 b 3.02 a 2.02 b 9.55 a 8.80 a 8.13 a 7.15 a 6.61 a 6.44 a
4.75 + 150 27.67 a 20.29 a 21.17 a 1.49 b 3.23 a 1.87 ab 9.85 a 8.21 a 9.52 a 8.32 a 6.78 b 8.09 ab
7.12 + 200 25.43 a 20.86 a 20.57 a 1.71 a 2.14 a 1.29 a 10.16 a 8.81 a 8.43 a 7.64 a 6.37 a 6.99 a
Control 0.0 18.33 a 19.88 a 21.75 a 1.32 a 1.50 a 1.50 a 7.90 b 10.2 a 7.91 b 6.77 a 7.40 a 6.74 a

Means of the effect of different doses of 6-benzyladenine and gibberellic acid on morpho-floral quality parameters of L. anceps, by experimental period.

Experimental period FL NFS NFR SF/length SF/width FSL
2017 24.55 a 1.44 c 2.09 a 9.36 a 7.81 a 38.90 a
2018 22.01 b 2.22 a 2.35 a 9.07 ab 7.20 b 35.45 a
2019 21.01 b 1.77 b 2.15 a 8.80 b 7.11 b 35.71 a
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