Micropropagation of Inula germanica L. from the Seedlings Explants

This is the first communication of micropropagation system for Inula germanica using seedling explants germinated in vitro. The development of this system gives the possibility of future reintroduction of I. germanica providing a way to stabilize or re-establish its population. Shoot tips and fragme...

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Bibliographic Details
Published in:Notulae botanicae Horti agrobotanici Cluj-Napoca 2018-01, Vol.46 (1), p.52-57
Main Authors: TREJGELL, Alina, KAMIŃSKA, Monika, LISOWSKA, Karolina, TRETYN, Andrzej
Format: Article
Language:English
Subjects:
Acclimatization
Auxins
Communications systems
Cotyledons
Explants
Flowering
Fluorescence
Fragments
Hypocotyls
Indole-3-butyric acid
Inula
Iris germanica
Micropropagation
Naphthaleneacetic acid
Organogenesis
Protected species
Reintroduction
Rooting
Roots
Seedlings
Shoots
Tips
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Summary:This is the first communication of micropropagation system for Inula germanica using seedling explants germinated in vitro. The development of this system gives the possibility of future reintroduction of I. germanica providing a way to stabilize or re-establish its population. Shoot tips and fragments of cotyledons, hypocotyls and roots were isolated from ten-day-old seedlings. Explants were put on MS medium containing 1.0 mg l-1 benzylaminopurine and 0.1 mg l-1 naphthaleneacetic acid and cultured under continuous white fluorescent light (45 μmol.m-2.s-1) at 26 ± 1 °C. The highest percentage of shoot organogenesis (83.3%) was recorded for hypocotyl, while the highest average number of shoots per explant (12.0) was recorded for shoot tips. In subsequent subcultures, multiplication rate decreased to 3.0-4.9 shoots per explant. Less than 19% shoots were able to root on the solid medium without auxins. The highest rooting efficiency (69.3%) was recorded for solid medium supplemented with indolebutyric acid, but growth of roots was inhibited. The percentage of rooted shoots (62.2%) and number of roots per shoot (2.4 per shoot) into the liquid medium were comparable to medium with 0.1 mg·l-1 indolebutyric acid. showing a positive impact on the process of acclimatization. The regenerated plants were able to flowering in the first year after acclimatization. Developed micropropagation system for I. germanica is efficient and can be a useful tool for the active protection of this species.
ISSN:0255-965X
1842-4309
DOI:10.15835/nbha46110810