Influence of plant growth regulators (BA, TDZ, 2-iP and NAA) on micropropagation of Aglaonema widuri
الموضوعات :
Behazd Kaviani
1
(Department of Horticultural Science, Rasht Branch, Islamic Azad University, Rasht, Iran)
Shahram Sedaghathoor
2
(Department of Horticultural Science, Rasht Branch, Islamic Azad University, Rasht, Iran)
Mohammad Reza Safari Motlagh
3
(Department of Plant Pathology, Rasht Branch, Islamic Azad University, Rasht, Iran)
Seddigeh Rouhi
4
(Department of Horticultural Science, Rasht Branch, Islamic Azad University, Rasht, Iran)
الکلمات المفتاحية: tissue culture, ornamental plants, phytohormones, Araceae, in vitro micropropagation,
ملخص المقالة :
Aglaonema widuri is an evergreen and indoor ornamental plant. This study aimed to investigate the effect of some plant growth regulators on micropropagation of A. widuri. A protocol was developed for high frequency in vitro multiplication of A. widuri on the same medium for both shoots and roots induction. This condition decreases time duration and cost of micropropagation. Apical buds as explants were obtained from greenhouse-grown A. widuri and were established on Murashige and Skoog (MS) medium. Three cytokinins [N6-benzyladenine (BA; 0.00, 3.00, 3.50, and 4.00 mgL-1), 1-phenyl-3-(1,2,3-thiaiazol-5-yl) urea (TDZ; 0.00, 0.50, and 1.00 mgL-1), and N6-(2-isopentenyl) adenine (2-iP; 0.00 and 7.00 mgL-1)] and one auxin [α-naphtaleneacetic acid (NAA; 0.00, 0.10, 0.20, 0.30, and 0.40 mgL-1)] were studied for their effect on miropropagation of A. widuri. BA and NAA treatments as 3.00 mgL-1 + 0.2 mgL-1 recorded the highest shoot proliferation rate (number: 6.00 shoots and length: 7.75 cm per explant). Treatment of 4.00 mgL-1 BA + 0.10 mgL-1 NAA + 0.50 mgL-1 TDZ produced maximum nodes (13.25 per explant). The largest number of leaf (4.25 per explant) was produced in the medium containing 3.50 mgL-1 BA + 0.20 mgL-1 NAA. Maximum root initiation and development (14.25 per explant) was obtained on medium containing 3.00 mgL-1 BA + 0.20 mgL-1 NAA. The combination of 3.50 mgL-1 BA + 0.20 mgL-1 NAA was found to be the most suitable growth regulators for obtaining the highest root length (8.25 cm per explant). The plantlets were transferred to pots and grown in the greenhouse with a success rate of 95%.
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