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Research Article Open access CC BY 4.0

In vitro Cytological Studies of Leaf Callus Cultures of Orthosiphon aristatus (Blume) Miq

P. Dorothy, M. S. Sudarshana, A. R. Nissar, H. V. Girish

Biotechnology Journal International · pp. 1–6 · Published 9 May 2016

10.9734/BBJ/2016/25638

Abstract

The study was carried out to unravel the in vitro cytological behaviour of leaf callus cultures of Orthosiphon ariststus (Blume) Miq. The cultures were raised using leaf explants on Murashige and Skoog (MS) medium supplemented with different growth regulators like auxins (2,4-D, IAA, NAA) and cytokinin (BAP) alone and in different concentrations and combinations. Best callusing from the leaf explants was achieved in 2,4-D supplemented MS medium at 5 mg/l concentration. Cytogenetic analysis of the chromosomal variations was carried out for primary cultures as well as 3-month-old callus cultures. The chromosome number did not show variations and the cells studied were observed to be diploid (2n= 28) in nature. Among the numerical observations induced, polyploid cells were the most frequent. The frequency of bridges was observed among the other structural changes. The composition and concentration of the growth regulators was found to affect chromosomal instability with multinucleate, multinucleolate and embryogenic masses. These observations indicate that genetic variations may arise during cell cultures.

Callus polyploidy cytokinesis multinucleate enucleated cells

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Cited by 7

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G. Manasa, C. Mahendra, K. K. Sampathkumar · Journal of Herbs, Spices & Medicinal Plants · 2018

Optimization of auxin and cytokinin concentrations for callus formation, total volatile extractables, total phenolic, and flavonoid contents in Orthosiphon aristatus leaves using response surface methodology

Luong Thi Le Tho, Le Dang Minh Tuan, Do Thi Tuyet Hoa · South African Journal of Botany · 2026

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