In vitro rhizogenesis of blueberry microcuttings under different LED light spectra

Florêncio, Mariana Trevisan; Kreyci, Patrícia Fabretti; Jacob, Jéssica Fernanda de Oliveira; Ambrosano, Guilherme Bovi; Demétrio, Christian Aparecido; Rodrigues, Paulo Hercílio Viegas

doi:10.1590/S1678-3921.pab2024.v59.03561

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Plant Physiology/ Scientific Notes • Pesq. agropec. bras. 59 • 2024 • https://doi.org/10.1590/S1678-3921.pab2024.v59.03561 linkcopy

In vitro rhizogenesis of blueberry microcuttings under different LED light spectra

Rizogênese in vitro de microestacas de mirtilo sob diferentes espectros de luz de LED

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

The objective of this work was to evaluate the effect of different LED light spectra on the in vitro rhizogenesis of microcuttings of blueberry 'Jewel', without the use of growth regulators. The plantlets were subjected to four LED light treatments, as follows: R, 100% red; R2B, 70% red and 30% blue; B, 100% blue; and CW, control white. After six weeks incubated in a culture room, R and R2B treatments show statistically significant effects on the in vitro rooting of blueberry.

Index terms:
rooting; tissue culture; plantlets

Light spectrum⁽¹⁾	H⁽²⁾ (mm)	LA⁽²⁾ (cm2)	PFM⁽²⁾ (g)	Cl a⁽²⁾	Cl b⁽²⁾	Cl T⁽²⁾	LN⁽³⁾	RL⁽³⁾ (mm)	R (%)
R	50.7 ± 14.2a	0.23 ± 0.07a	0.045 ± 0.021ab	1.41 ± 0.17a	27.5 ± 4.8b	28.9 ± 4.7b	10 (6; 12)a	17.6 (0; 28.9)a	63.33
R2B	41.6 ± 14.3b	0.26 ± 0.08a	0.052 ± 0.020a	1.31 ± 0.83a	31.1 ± 2.8b	32.4 ± 3.6ab	9 (4; 11)b	9.8 (0; 29.7)a	76.66
B	20.7 ± 9.3d	0.13 ± 0.05b	0.035 ± 0.022bc	1.27 ± 0.16a	30.4 ± 4.0b	31.7 ± 4.2ab	7 (3; 11)c	0 (0; 19.3)b	30.00
CW	29.3 ± 10.3c	0.14 ± 0.07b	0.024 ± 0.013c	1.85 ± 0.91a	37.0 ± 1.6a	38.8 ± 2.5a	8 (3; 9)bc	0 (0; 24.6)b	26.66
CV (%)	34.4	35.5	26.0	42.9	6.3	6.4	-	-

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[TFN1] ⁽¹⁾
Light treatments: R, 100% red; R2B, 70% red and 30% blue; B, treatment 100% blue; and CW, treatment control white.

[TFN2] ⁽²⁾
Different letters, in the same column, indicate significant differences by Tukey’s test, at 5% probability.

[TFN3] ⁽³⁾
Different letters, in the same column, indicate significant differences, by Dunn’ test, at 5% probability).