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Aeroponics for adventitious rhizogenesis in evergreen haloxeric tree Tamarix aphylla (L.) Karst.: influence of exogenous auxins and cutting type - PubMed

Aeroponics for adventitious rhizogenesis in evergreen haloxeric tree Tamarix aphylla (L.) Karst.: influence of exogenous auxins and cutting type

Udit Sharma et al. Physiol Mol Biol Plants. 2018 Feb.

Abstract

Tamarix aphylla (L.) Karst., a drought resistant halophyte tree, is an agroforestry species which can be used for reclamation of waterlogged saline and marginal lands. Due to very low seed viability and unsuitable conditions for seed germination, the tree is becoming rare in Indian Thar desert. Present study concerns the evaluation of aeroponics technique for vegetative propagation of T. aphylla. Effect of various exogenous auxins (indole-3-acetic acid, indole-3-butyric acid, naphthalene acetic acid) at different concentrations (0.0, 1.0, 2.0, 3.0, 5.0, 10.0 mg l-1) was examined for induction of adventitious rooting and other morphological features. Among all three auxins tested individually, maximum rooting response (79%) was observed with IBA 2.0 mg l-1. However, stem cuttings treated with a combination of auxins (2.0 mg l-1 IBA and 1.0 mg l-1 IAA) for 15 min resulted in 87% of rooting response. Among three types of stem cuttings (apical shoot, newly sprouted cuttings, mature stem cuttings), maximum rooting (~ 90%) was observed on mature stem cuttings. Number of roots and root length were significantly higher in aeroponically rooted stem cuttings as compared to stem cuttings rooted in soil conditions. Successfully rooted and sprouted plants were transferred to polybags with 95% survival rate. This is the first report on aeroponic culture of Tamarix aphylla which can be utilized in agroforestry practices, marginal land reclamation and physiological studies.

Keywords: Adventitious rooting; Aeroponics; Farash; Haloxeric tree; Stem cuttings; Tamarix aphylla.

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Conflict of interest statement

Compliance with ethical standardsAuthors declare that they have no conflict of interest.

Figures

Fig. 1
Fig. 1

Adventitious rhizogenesis in T. aphylla. a Mature candidate plus tree of T. aphylla. b Sprouted shoots in stem cuttings. c Suspended roots in aeroponic chamber. d Stem cuttings rooted under aeroponic growth chamber. e Stem cuttings rooted in soil. f Successfully rooted plats in polybags

Fig. 2
Fig. 2

Effect of different type of stem cuttings on percent rooting in aeroponics and transplant survival. Mean values followed by different letters are significantly different according to DMRT test at P < 0.05

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