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. 2009 Feb 26;14(4):347–353. doi: 10.1007/s12298-008-0033-z

TDZ-induced direct shoot organogenesis and somatic embryogenesis on cotyledonary node explants of lentil (Lens culinaris Medik.)

Gulshan Chhabra 1, Darshna Chaudhary 1, Madan Varma 1, Manish Sainger 1, Pawan K Jaiwal 1,✉
PMCID: PMC3550644  PMID: 23572901

Abstract

An efficient and simple procedure for inducing high frequency direct shoot organogenesis and somatic embryogenesis in lentil from cotyledonary node explants (without both the cotyledons) in response to TDZ alone is reported. TDZ at concentration lower than 2.0 μM induced shoot organogenesis whereas at higher concentration (2.5–15 μM) it caused a shift in regeneration from shoot organogenesis to somatic embryogenesis. The cotyledonary node and seedling cultures developed only shoots even at high concentrations of BAP and TDZ, respectively. TDZ at 0.5 and 5.0 μM was found to be optimal for inducing an average of 4–5 shoots per cotyledonary node in 93 % of the cultures and 55 somatic embryos in 68 % of the cultures, respectively. The somatic embryos were germinated when transferred to lower TDZ concentration (0.5–1.0 μM). The shoots were rooted on MS basal medium containing 2.5 μM IBA. The plantlets were obtained within 8 weeks from initiation of culture and were morphologically similar to seed-raised plants. The possible role of stress in thidiazuron induced somatic embryogenesis is discussed.

Key words: Thidiazuron, Lens culinaris, Somatic embryogenesis, Organogenesis

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Abbreviations

2-iP

2-isopentanyl adenine

TDZ

Thidiazuron

AdS

Adenine sulphate

KIN

Kinetin

BAP

6-benzyl aminopurine

IBA

Indole-3-butyric acid

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