Rapid propagation of <i>Homalomena gigantea</i> ornamental plant using rhizome cuttings

Pham, Thanh; Thoi, Trung Le Nguyen; Thi, Nhung Dang; Nhat, Minh Nguyen Hoang; Yen, Thao Nguyen Huynh; Tuyet, Anh Bui Thi; Yen, Nhi Vuong Thi; Quynh, Trang Nguyen Thi

doi:10.1590/2447-536X.v30.e242711

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Article • Ornam. Hortic. 30 • Jan-Dec 2024 • https://doi.org/10.1590/2447-536X.v30.e242711 copy

Rapid propagation of Homalomena gigantea ornamental plant using rhizome cuttings

Propagação rápida da planta ornamental Homalomena gigantea usando estacas de rizoma

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

This study investigates the critical factors influencing shoot and root regeneration from Homalomena gigantea rhizome cuttings, providing valuable insights for rhizome cutting practices for this plant species. Three key experiments were conducted to assess the impact of plant growth regulator (PGR) concentrations, cutting length, and cutting section on regeneration. In the first experiment, different concentrations of α-NAA and BAP were examined, revealing that PGR selection and concentration play a pivotal role in shoot and root induction and plantlet development. The highest success rates were observed at 150 ppm α-NAA and 100 ppm BAP, although there was a trade-off between the quantity and quality of plantlets, emphasizing the need for a balanced plant regulator selection. The second experiment investigated the influence of rhizome cutting length. Longer cuttings, particularly at 5 and 7 cm, consistently led to better shoot and root development, highlighting the importance of selecting appropriate cutting lengths. In the third experiment, cutting sections (apical, middle, and distal) without PGR concentrations were assessed, with all sections showing high regeneration rates. However, the apical section produced the highest-quality plantlets with superior growth parameters, followed by the middle section, while the distal section exhibited lower effectiveness. In summary, these findings underscore the significance of PGR choice and concentration, cutting length, and cutting section for successful regeneration of H. gigantea from rhizome cuttings. These insights provide valuable guidance for enhancing rhizome cuttings methods for this plant species and promoting efficient propagation.

Keywords:
apical rhizome; distal rhizome; Homalomena gigantea; middle rhizome

Plant growth regulator	Treatment [ppm]	Percent response [%]		Quality of rhizome cutting plantlets per explant (Mean ± SE)
Plant growth regulator	Treatment [ppm]	Shoot	rooting	No. of shoots	Shoot length	No. of roots	Root length
α-NAA	CT	87.38 ± 0.63 c	73.94 ± 0.11 d	1.00 ± 0.97 c	2.63 ± 0.25 b	2.20 ± 0.20 e	8.63 ± 0.50 g
	50	95.80 ± 0.49 b	85.46 ± 0.04 b	1.29 ± 0.12 bc	5.40 ± 0.35 a	3.20 ± 0.26 cd	10.46 ± 0.53 ef
	100	94.32 ± 0.28 b	97.36 ± 0.87 a	1.26 ± 0.11 bc	4.60 ± 0.29 ab	2.47 ± 0.27 e	18.2 ± 0.59 a
	150	97.45 ± 0.57 a	97.14 ± 0.36 a	1.53 ± 0.13 ab	6.06 ± 0.33 a	5.53 ± 0.26 b	12.03 ± 0.60 cd
	200	85.65 ± 0.99 c	97.78 ± 0.85 a	1.20 ± 0.10 bc	4.06 ± 0.22 ab	3.40 ± 0.29 c	9.20 ± 0.18 fg
	Regression	0.054	0.891	0.532	0.528	0.571	0.1
BAP	50	89.66 ± 0.39 c	99.34 ± 0.27 a	1.27 ± 0.11 bc	4.00 ± 0.23 ab	1.93 ± 0.18 e	12.63 ± 0.49 c
	100	99.36 ± 0.10 a	98.42 ± 0.59 a	1.80 ± 0.20 a	4.23 ± 0.22 ab	2.60 ± 0.19 de	15.77 ± 0.40 b
	150	99.52 ± 0.20 a	97.49 ± 0.85 a	1.83 ± 0.15 a	5.67 ± 0.21 a	6.93 ± 0.33 a	14.53 ± 0.60 b
	200	91.93 ± 0.12 c	81.59 ± 0.41 c	1.34 ± 0.6 bc	3.23 ± 0.38 b	1.20 ± 0.11 f	11.13 ± 0.41 de
	Regression	0.536	0.183	0.541	0.349	0.443	0.386

Treatment [cm]	Percent response [%]		Quality of rhizome cutting plantlets per explant (Mean ± SE)
Treatment [cm]	Shoot	Root	No. of shoots	Shoot length	No. of roots	Root length
1	82.42 ± 0.62 b	84.74 ± 0.23 b	0.93 ± 0.67 c	2.33 ± 0.24 b	2.00 ± 0.23 d	6.07 ± 0.38 c
3	96.83 ± 0.26 a	97.84 ± 0.14 a	1.53 ± 0.17 b	4.73 ± 0.32 a	7.73 ± 0.35 b	15.27 ± 0.64 a
5	97.87 ± 0.14 a	98.63 ± 0.11 a	2.27 ± 0.23 a	4.13 ± 0.35 a	10.40 ± 0.51 a	14.10 ± 0.43 a
7	95.84 ± 0.33 a	96.70 ± 0.25 a	1.53 ± 1.65 b	4.20 ± 0.23 a	5.20 ± 0.31 c	10.67 ± 0.60 b

Section of rhizome	Percent response [%]		Quality of rhizome cutting plantlets per explant (Mean ± SE)
Section of rhizome	Shoot	Root	No. of shoot	Shoot length	No. of root	Root length
Apical	99.82 ± 0.04 a	99.66 ± 0.05 a	1.40 ± 0.13 b	6.70 ± 0.25 a	34.67 ± 0.72 a	19.86 ± 0.94 a
Middle	99.78 ± 0.06 a	99.70 ± 0.10 a	1.87 ± 0.19 a	3.67 ± 0.25 b	10.33 ± 0.48 b	14.13 ± 0.32 b
Distal	99.74 ± 0.07 a	99.76 ± 0.10 a	1.60 ± 0.13 ab	3.06 ± 0.22 b	4.67 ± 0.27 c	10.60 ± 0.43 c

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[1] * Corresponding author: nguyenthiquynhtrang@dhsphue.edu.vn; ntqtrang@hueuni.edu.vn